7Baggers

Tidewater Inc
(NYSE:TDW) 

TDW stock logo

Tidewater Inc., together with its subsidiaries, provides offshore marine support and transportation services to the offshore energy industry through the operation of a fleet of marine service vessels worldwide. It provides services in support of offshore oil and natural gas exploration, field develo...

Founded: 1956
Full Time Employees: 5,300
Sector: Energy
Industry: Oil & Gas Equipment & Services

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At a glance:
Bull Thesis:
Bear Thesis:
Main Competitors:
Moat:
Income Statements:
Quarterly
Annual
    Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 2004-09-30 2004-06-30 2004-03-31 2003-12-31 2003-09-30 2003-06-30 2003-03-31 2002-12-31 2002-09-30 2002-06-30 2002-03-31 
                                                                                                   
      revenues:
                                                                                                   
      vessel revenues
    323,418,000 332,883,000 338,491,000 336,858,000 330,699,000 343,463,000 338,485,000 337,003,000 318,686,000 300,515,000 296,975,000 210,323,000 191,180,000 185,106,000 190,247,000 162,175,000 103,876,000 100,428,000 91,634,000 88,514,000 80,993,000 87,830,000 85,395,000 100,975,000 111,974,000 117,173,000 123,641,000 87,494,000 -116,795,000 97,011,000 112,257,000 156,905,000 70,571,000 112,257,000 156,905,000 125,120,000 139,361,000 162,430,000 180,048,000 212,908,000 264,131,000 298,313,000 317,770,000 378,126,000 390,952,000 381,510,000 362,450,000 360,713,000 363,668,000 331,630,000 325,039,000 305,043,000 309,822,000 290,094,000 288,255,000 270,486,000 248,412,000 253,315,000 252,714,000 269,633,000 266,870,000 261,996,000 258,656,000 274,507,000 294,563,000 310,436,000 334,133,000 349,181,000 344,637,000 328,371,000 314,205,000 310,670,000 297,368,000 292,891,000 287,092,000 280,491,000 271,314,000 258,685,000 235,274,000 228,086,000 198,230,000 185,392,000 174,450,000 170,076,000 161,206,000 149,794,000 144,463,000 162,097,000 159,052,000 160,336,000 151,123,000 160,716,000 155,952,000 156,764,000  
      other operating revenues
    2,804,000 3,915,000 2,622,000 4,573,000 2,745,000 1,622,000 1,871,000 2,227,000 2,478,000 2,143,000 2,287,000 4,638,000 1,924,000 1,640,000 1,515,000 1,272,000 1,853,000 4,747,000 767,000 1,439,000 2,511,000 4,029,000 1,072,000 1,369,000 4,394,000 2,592,000 2,218,000 3,999,000 -738,000 2,181,000 2,849,000 3,844,000 3,729,000 2,849,000 3,844,000 4,095,000 4,361,000 5,495,000 4,126,000 5,283,000 7,792,000 6,461,000 6,992,000 9,428,000 6,572,000 4,167,000 5,383,000 4,535,000 4,269,000 2,455,000    4,354,000    1,292,000                                      
      total revenue
    326,222,000 336,798,000 341,113,000 341,431,000 333,444,000 345,085,000 340,356,000 339,230,000 321,164,000 302,658,000 299,262,000 214,961,000 193,104,000 186,746,000 191,762,000 163,447,000 105,729,000                                                                               
      yoy
    -2.17% -2.40% 0.22% 0.65% 3.82% 14.02% 13.73% 57.81% 66.32% 62.07% 56.06% 31.52% 82.64%                                                                                   
      qoq
    -3.14% -1.26% -0.09% 2.40% -3.37% 1.39% 0.33% 5.63% 6.11% 1.13% 39.22% 11.32% 3.40% -2.62% 17.32% 54.59%                                                                                
      costs and expenses:
                                                                                                   
      vessel operating costs
    166,187,000 172,119,000 176,130,000 167,354,000 164,979,000 170,384,000 178,654,000 176,513,000 167,556,000 158,553,000 164,239,000 118,264,000 115,459,000 115,496,000 113,037,000 100,257,000 68,511,000 71,187,000 65,344,000 64,263,000 61,020,000 63,397,000 61,784,000 64,774,000 78,825,000 80,619,000 80,439,000 61,364,000 -74,111,000 65,237,000 83,773,000 80,845,000 52,301,000 83,773,000 80,845,000 82,358,000 87,094,000 108,874,000 98,146,000 125,094,000 158,612,000 179,281,000 193,940,000 210,365,000 212,819,000 217,244,000 206,734,000 197,679,000 195,316,000 196,161,000 185,640,000 180,895,000 177,055,000 165,828,000 168,707,000 155,838,000 161,290,000 152,302,000 153,518,000 160,597,000 169,892,000 154,583,000 145,894,000 148,188,000 157,526,000 153,651,000 147,457,000 161,320,000 175,371,000 176,728,000 155,168,000 148,731,000 142,307,000 138,540,000 131,484,000 123,997,000 122,568,000 119,762,000 115,852,000 103,414,000 106,005,000 106,210,000 103,221,000 101,825,000 98,261,000 98,564,000 95,705,000 96,815,000 103,862,000 98,317,000 91,940,000 90,013,000 90,279,000 90,930,000  
      costs of other operating revenues
    761,000 630,000 1,252,000 3,108,000 1,430,000 688,000 901,000 816,000 1,150,000 1,337,000 1,481,000 373,000 1,151,000 694,000 592,000 483,000 361,000 228,000 355,000 581,000 1,067,000 342,000 219,000 171,000 2,673,000 534,000 586,000 2,474,000 -1,005,000 1,681,000 1,585,000 2,689,000 2,273,000 1,585,000 2,689,000 2,714,000 3,423,000 3,903,000 3,187,000 3,778,000 6,102,000 5,744,000 6,889,000 8,395,000 6,560,000 4,661,000 5,588,000 4,097,000 4,040,000 2,020,000    3,523,000    1,231,000                                      
      general and administrative
    33,559,000 38,968,000 35,256,000 31,213,000 29,094,000 30,688,000 28,471,000 26,329,000 25,329,000 24,724,000 21,001,000 26,013,000 23,545,000 28,633,000 27,267,000 27,804,000 18,217,000 17,641,000 18,045,000 16,787,000 16,043,000 16,992,000 17,438,000 17,597,000 21,420,000 30,474,000 23,696,000 23,565,000 -26,917,000 25,546,000 33,059,000 41,727,000 16,246,000 33,059,000 41,727,000 34,151,000 32,954,000 37,047,000 36,974,000 35,598,000 37,286,000 43,953,000 45,355,000 46,642,000 46,762,000 51,060,000 45,735,000 45,723,000 46,038,000 50,480,000 46,739,000 46,339,000 41,867,000 40,664,000 40,791,000 40,425,000 37,773,000 37,581,000 41,522,000 33,238,000 37,919,000 32,775,000 44,182,000 33,676,000 37,686,000 34,388,000 34,136,000 31,669,000 35,315,000 35,108,000 33,285,000 31,112,000 30,680,000 31,512,000 26,137,000 24,924,000 23,975,000 23,692,000 24,943,000 22,855,000 19,433,000 19,259,000 19,379,000 18,741,000 17,702,000 17,602,000 16,871,000 17,137,000 17,237,000 16,269,000 16,839,000 16,790,000 16,168,000 15,609,000  
      depreciation and amortization
    66,619,000 66,189,000 66,404,000 64,314,000 65,432,000 64,620,000 62,435,000 59,445,000 56,270,000 59,167,000 57,730,000 32,768,000 30,666,000 29,881,000 30,856,000 31,766,000 26,657,000 28,288,000 27,980,000 28,549,000 29,727,000 30,681,000 30,777,000 28,144,000 27,107,000 25,735,000 25,038,000 12,017,000 -17,855,000 13,390,000 36,287,000 37,592,000 8,142,000 36,287,000 37,592,000 41,302,000 43,845,000 44,552,000 45,251,000 45,422,000 45,979,000 45,657,000 45,054,000 43,331,000 43,708,000 43,111,000 42,925,000 42,391,000 42,056,000 40,108,000 38,287,000 37,181,000 36,047,000 35,784,000 35,585,000 35,215,000 33,807,000 33,749,000 34,723,000 35,058,000 35,832,000 34,963,000 33,541,000 32,734,000 32,260,000 31,649,000 32,780,000 32,173,000 30,657,000 30,621,000 31,681,000 31,123,000 29,836,000 28,197,000 29,912,000 29,912,000 28,563,000 27,797,000 27,683,000 26,892,000 26,614,000 26,337,000 25,677,000 25,298,000 24,713,000 23,925,000 25,303,000 24,715,000 24,371,000 24,121,000 21,916,000 21,020,000 20,297,000 19,920,000  
      loss on asset dispositions
    112,000         -4,218,000 -863,000 -1,404,000  -1,076,000 -264,000 1,297,000 -207,000 -53,000 74,000 932,000 1,948,000   -1,660,000  -270,000 494,000   1,571,000            7,607,000  1,537,000                                                    
      total costs and expenses
    267,238,000 272,822,000 278,462,000 260,509,000 258,397,000 263,708,000 270,410,000 261,103,000 239,266,000 239,563,000 243,588,000 176,014,000 168,605,000 173,628,000 172,702,000 161,607,000 113,039,000                                                                               
      operating income
    58,984,000 63,976,000 62,651,000 80,922,000 75,047,000 81,377,000 69,946,000 78,127,000 81,898,000 63,095,000 55,674,000 38,947,000 24,499,000 13,118,000 19,060,000 1,840,000 -7,310,000 -26,992,000 -21,564,000 -20,159,000 -26,301,000 -25,348,000 -25,176,000 -117,745,000 -18,533,000 -22,551,000 -4,394,000 -12,194,000 13,547,000 -25,086,000 -205,374,000 -69,340,000 -5,782,000 -205,374,000 -69,340,000 -287,034,000 -155,344,000 -66,135,000 -56,569,000 -9,400,000 -17,644,000 14,089,000   84,723,000 66,004,000 61,063,000 20,488,000 76,565,000 43,425,000 58,574,000 40,974,000 57,197,000 49,487,000 46,383,000 41,191,000 -5,481,000 31,461,000 24,575,000 42,602,000 26,892,000 45,267,000 45,604,000 66,493,000 72,027,000 56,206,000                              
      yoy
    -21.40% -21.38% -10.43% 3.58% -8.37% 28.98% 25.63% 100.60% 234.29% 380.98% 192.10% 2016.68% -435.14% -148.60% -188.39% -109.13% -72.21% 6.49% -14.35% -82.88% 41.91% 12.40% 472.96% 865.60% -236.81% -10.11% -97.86% -82.41% -334.30% -87.79% 196.18% -75.84% -96.28% 210.54% 22.58% 2953.55% 780.44% -569.41%   -120.83% -78.65%   10.65% 52.00% 4.25% -50.00% 33.86% -12.25% 26.28% -0.53% -1143.55% 57.30% 88.74% -3.31% -120.38% -30.50% -46.11% -35.93% -62.66% -19.46%                                  
      qoq
    -7.80% 2.11% -22.58% 7.83% -7.78% 16.34% -10.47% -4.60% 29.80% 13.33% 42.95% 58.97% 86.76% -31.18% 935.87% -125.17% -72.92% 25.17% 6.97% -23.35% 3.76% 0.68% -78.62% 535.33% -17.82% 413.22% -63.97% -190.01% -154.00% -87.79% 196.18% 1099.24% -97.18% 196.18% -75.84% 84.77% 134.89% 16.91% 501.80% -46.72% -225.23%    28.36% 8.09% 198.04% -73.24% 76.32% -25.86% 42.95% -28.36% 15.58% 6.69% 12.60% -851.52% -117.42% 28.02% -42.31% 58.42% -40.59% -0.74% -31.42% -7.68% 28.15%                               
      operating margin %
    18.08% 19.00% 18.37% 23.70% 22.51% 23.58% 20.55% 23.03% 25.50% 20.85% 18.60% 18.12% 12.69% 7.02% 9.94% 1.13% -6.91% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% Infinity% NaN% NaN% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% -Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN%  
      other income:
                                                                                                   
      foreign exchange gain
    -3,403,000 2,134,000 1,277,000 11,703,000 7,569,000 -234,750 5,522,000  -4,085,000    2,348,000   -1,881,000 946,000   422,000 -850,000 -2,880,000 -1,153,000 -2,076,000 864,000 173,000 11,000   1,000  664,000   664,000 2,970,000 -2,539,000  -1,645,000 -469,000 844,000  225,000 4,334,000 5,408,000  -2,728,000 1,341,000 3,017,000  4,181,000 52,000 529,000 -1,751,000 2,574,000 -1,738,000 1,659,000 814,000 131,000 973,000 -436,000 1,610,000  161,000 -2,252,000  -1,998,000 3,396,000 2,487,000    141,000   -468,000 35,000 -769,000 -120,000 136,000 411,000 608,000  -645,000 13,000 437,000        -852,000  
      interest income and other
    2,189,000 3,454,000 455,000 2,103,000 2,157,000 2,697,000 1,028,000 1,175,000 1,483,000 3,029,000 568,000 2,790,000 130,000 981,000 581,000 349,000 3,486,000 1,426,000 148,000 8,000 23,000 144,000 272,000 696,000 116,000 1,579,000 1,859,000 -128,000 -2,724,000 2,709,000 1,680,000 1,588,000 873,000 1,680,000 1,588,000 1,437,000 992,000 1,176,000 949,000 609,000 355,000 790,000 372,000 434,000 499,000 622,000 708,000 137,000 538,000 740,000 693,000 936,000 1,128,000 719,000 1,137,000 347,000 766,000 1,190,000 1,584,000 1,074,000 2,029,000 378,000 2,234,000 978,000 502,000 3,168,000 2,370,000 1,372,000 1,425,000 1,899,000 3,178,000 4,077,000                        
      interest and other debt costs
    -16,891,000 -16,715,000 -16,589,000 -16,442,000 -16,344,000 -16,742,000 -17,622,000 -19,127,000 -19,476,000 -20,263,000 -19,288,000 -4,731,000 -4,190,000 -4,339,000 -4,391,000 -4,284,000 -4,175,000 -3,417,000 -3,681,000 -3,944,000 -4,541,000 -5,984,000 -6,071,000 -5,959,000 -6,142,000 -7,468,000 -7,582,000 -7,599,000 9,722,000 -7,585,000 -10,605,000 -21,008,000 -5,240,000 -10,605,000 -21,008,000 -18,587,000 -18,477,000 -16,954,000 -14,011,000 -13,312,000 -13,247,000    -12,559,000 -13,129,000 -12,733,000 -12,250,000 -9,918,000 -8,913,000 -7,827,000 -7,183,000 -7,148,000 -7,587,000 -7,454,000 -6,027,000 -4,766,000 -4,061,000 -4,364,000 -3,646,000 -1,686,000    -450,000     -320,000  -1,535,000 -1,336,000 -2,842,000  -2,464,000 -2,345,000 -2,580,000  -2,357,000 -1,911,000 -2,362,000  -1,694,000 -1,636,000 -1,374,000  -920,000 -1,004,000 -240,000  -109,000 -95,000 -125,000  
      total other expense
    -18,105,000 -11,139,000 -41,958,000 -2,636,000 -6,618,000 -28,382,000 -11,072,000 -20,323,000 -22,083,000 -14,974,000 -20,865,000 -5,735,000 -1,712,000 -1,239,000 -7,798,000 -20,235,000          -6,184,000 -5,617,000                                                                     
      income before income taxes
    40,879,000 52,837,000 20,693,000 78,286,000 68,429,000 52,995,000 58,874,000 57,804,000 59,815,000 48,121,000 34,809,000 33,212,000 22,787,000 11,879,000 11,262,000 -18,395,000 -7,053,000 -41,126,000 -25,520,000 -23,621,000 -33,518,000 -33,904,000 -32,128,000 -107,934,000 -23,695,000 -28,735,000 -10,011,000 -35,708,000 34,311,000 -29,905,000 -524,115,000 -85,255,000 -10,782,000 -524,115,000 -85,255,000 -299,657,000 -174,055,000 -84,647,000 -15,442,500 -24,282,000                                                        
      income tax expense
    34,903,000 -166,612,000 21,711,000 5,584,000 26,109,000 16,376,000 12,883,000 7,887,000 13,070,000 10,793,000 9,260,000 11,284,000 11,971,000 1,697,000 6,352,000 6,619,000 5,218,000 -3,047,000 887,000 6,026,000 2,009,000 -4,477,000 5,953,000 2,730,000 -5,171,000 15,071,000 5,542,000 3,321,000 2,599,000 1,278,000 295,000 1,717,000 4,745,000 295,000 1,717,000 -2,884,000 3,568,000 3,996,000 3,823,000 -4,679,000 11,388,000 10,287,000   21,067,000 13,792,000 7,822,000 -196,000 15,667,000  12,860,000 7,471,000 13,707,000  12,612,000 3,168,000 510,000  13,326,000 9,931,000 10,181,000  2,530,000 10,885,000 -22,801,000                               
      net income
    5,976,000 219,449,000 -1,018,000 72,702,000 42,320,000 36,619,000 45,991,000 49,917,000 46,745,000 37,328,000 25,549,000 21,928,000 10,816,000 10,182,000 4,910,000 -25,014,000 -12,271,000 -38,079,000 -26,407,000 -29,647,000 -35,527,000 -29,427,000 -38,081,000 -110,664,000 -18,524,000 -43,806,000 -15,553,000 -39,029,000 42,668,000 -31,183,000 -524,410,000 -86,972,000 -15,527,000 -524,410,000 -86,972,000 -296,773,000 -177,623,000 -88,643,000 -19,691,500 -19,603,000                                                        
      yoy
    -85.88% 499.28% -102.21% 45.65% -9.47% -1.90% 80.01% 127.64% 332.18% 266.61% 420.35% -187.66% -188.14% -126.74% -118.59% -15.63% -65.46% 29.40% -30.66% -73.21% 91.79% -32.82% 144.85% 183.54% -143.41% 40.48% -97.03% -55.12% -374.80% -94.05% 502.96% -70.69% -91.26% 491.60% 341.67% 1413.92%                                                            
      qoq
    -97.28% -21656.88% -101.40% 71.79% 15.57% -20.38% -7.87% 6.79% 25.23% 46.10% 16.51% 102.74% 6.23% 107.37% -119.63% 103.85% -67.77% 44.20% -10.93% -16.55% 20.73% -22.73% -65.59% 497.41% -57.71% 181.66% -60.15% -191.47% -236.83% -94.05% 502.96% 460.13% -97.04% 502.96% -70.69% 67.08% 100.38% 350.16% 0.45%                                                         
      net income margin %
    1.83% 65.16% -0.30% 21.29% 12.69% 10.61% 13.51% 14.71% 14.55% 12.33% 8.54% 10.20% 5.60% 5.45% 2.56% -15.30% -11.61% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN%  
      net loss attributable to noncontrolling interests
    -164,000 -193,250 -212,000 -228,000 -333,000 -274,500 -380,000 -437,000  -307,000 -650,000   -1,500 -470,000  -103,000 -136,500 -149,000 -185,000 -212,000                                                                           
      net income attributable to tidewater inc.
    6,140,000 219,884,000 -806,000 72,930,000 42,653,000 36,905,000 46,371,000 50,354,000 47,026,000 37,664,000 26,199,000 22,584,000 10,738,000 -8,092,250 5,380,000                                                                                 
      basic income per common share
    120 4,400 -20 1,470 830 700 880 960 900 720 500 440 210 -190 120                                                                                 
      diluted income per common share
    120 4,370 -20 1,460 830 700 870 940 890 710 490 430 210 -190 100                                                                                 
      weighted-average common shares outstanding
    49,589,000 50,053,000 49,498,000 49,674,000 51,502,000 52,452,000 52,490,000 52,684,000 52,320,000 51,591,000 52,230,000 50,857,000 50,604,000 44,132,000 44,451,000 41,814,000 41,412,000 41,008,907,000 41,132,000 40,899,000 40,716,000 40,354,638,000 40,405,000 40,306,000 40,101,000 38,537,000 37,571,000 23,425,000 21,539,143,000 26,614,507,000 47,121,304,000 47,080,783,000 19,389,031,000 47,121,304,000 47,071,066,000 47,068,079,000 47,067,864,000 47,067,715,000 46,981,102,000 46,943,705,000 46,942,950,000 46,981,747,000 48,658,840,000 48,481,722,000 49,582,086,000 49,580,038,000 49,392,749,000 49,347,448,000 49,274,816,000 49,226,911,000 49,550,391,000 49,162,547,000 49,392,973,000 50,193,065,000 51,165,460,000 51,036,420,000 51,296,924,000 51,278,261,000 51,221,800,000 51,053,051,000 51,003,348,000 51,328,284,000 51,447,077,000 51,373,290,000 51,371,295,000 51,362,308,000 51,364,237,000 51,242,848,000 51,246,848,000 51,519,584,000 54,259,495,000 53,498,846,000 55,111,678,000 56,072,548,000 55,914,998,000 55,211,834,000 55,595,519,000 57,296,433,000 57,372,815,000 57,231,972,000 57,189,133,000 57,230,937,000 56,854,282,000 57,035,705,000 56,937,688,000 56,900,905,000 56,563,328,000 56,660,962,000 56,640,767,000 56,620,317,000 56,413,856,000 56,476,727,000 56,396,271,000 56,258,224,000  
      dilutive effect of warrants and restricted stock units
    249,000 91,000                                                                                              
      adjusted weighted-average common shares
    49,838,000 50,432,000 49,498,000 50,011,000 51,678,000 53,071,000 53,083,000 53,347,000 52,900,000 52,937,000 53,610,000 52,005,000 51,972,000 44,132,000 51,520,000 41,814,000 41,412,000 41,008,907,000 41,132,000 40,899,000 40,716,000 40,354,638,000 40,405,000 40,306,000 40,101,000 38,537,000 37,571,000 23,425,000 21,539,143,000 26,614,507,000 47,121,304,000 47,080,783,000 19,389,031,000 47,121,304,000 47,071,066,000 47,068,079,000 47,067,864,000 47,067,715,000 46,981,102,000 46,943,705,000 46,942,950,000 46,981,747,000 48,658,840,000 48,481,722,000 49,812,927,000 49,863,024,000 49,680,114,000 49,830,266,000 49,723,119,000 49,558,001,000 49,734,040,000 49,384,285,000 49,625,070,000 50,367,751,000 51,429,567,000 51,242,749,000 51,578,053,000 51,593,788,000 51,487,083,000 51,359,698,000 51,157,167,000 51,562,208,000 51,689,030,000 51,654,252,000 51,605,466,000 51,561,572,000 51,546,857,000 51,317,136,000 51,486,084,000 51,815,039,000 54,606,806,000 53,814,255,000 55,558,944,000 56,519,346,000 56,508,272,000 55,816,403,000 56,120,976,000 58,008,263,000 57,966,671,000 57,928,135,000 57,734,399,000 57,582,035,000 57,068,274,000 57,268,729,000 57,079,990,000 56,962,951,000 56,688,390,000 56,750,338,000 56,722,797,000 56,765,375,000 56,602,630,000 56,597,466,000 56,497,530,000 56,662,433,000  
      gain on asset dispositions
     -5,084,000 -580,000 -5,480,000 -2,538,000 -2,672,000 -51,000 -2,000,000 -11,039,000    -2,216,000         -80,000 -520,000  -5,331,000   -1,919,000 -4,930,000  -3,189,000 -6,064,000 -4,000 -3,189,000 -4,508,750 -6,139,000 -6,253,000 -5,643,000 -6,692,000 -5,883,000 -6,111,000    -3,590,000 -2,943,000 -2,363,000 -7,170,000 -49,000 -2,140,000 -3,839,000 -99,000 -1,833,000 -838,000 -3,986,000 -2,496,000 -9,458,000 -1,717,000 -1,607,000 -2,425,000 -3,638,000                                   
      loss on early extinguishment of debt
     -12,000 -27,101,000                                              -4,144,000                                               
      equity in net earnings of unconsolidated companies
           5,000  10,000 4,000 25,000  14,000 9,000 -244,000  -1,625,000 100,000 52,000      -468,000 95,000  -3,748,250 56,000 4,517,000 2,841,000 1,305,000 4,517,000 2,841,000 1,557,000 1,313,000  -6,511,000 -1,710,000 -2,919,000  1,075,000  3,821,000 5,283,000 4,929,000 2,671,000 3,781,000 4,420,000 3,830,000 2,639,000 3,357,000 2,363,000 3,614,000 3,482,000 3,456,000 2,489,000 3,419,000 3,291,000 2,785,000 2,690,000 3,403,000 3,732,000 5,557,000 5,415,000 4,905,000 4,079,000 3,798,000 4,196,000 4,218,000 3,141,000 3,725,000 3,386,000 3,229,000 1,879,000 3,376,000 2,449,000 2,925,000 2,228,000 2,715,000 2,167,000 1,798,000 1,169,000 1,639,000 1,693,000 1,296,000 1,532,000 1,631,000 1,793,000 1,343,000 1,396,000 1,723,000 1,227,000  
      dilutive effect of warrants, restricted stock units and stock options
       337,000 176,000 -37,000 593,000 663,000 580,000 24,000 1,380,000 1,148,000 1,368,000  7,069,000                                                                                 
      equity in net losses of unconsolidated companies
            -5,000            -1,849,000       -15,439,000          -1,000                                                          
      foreign exchange loss
           -2,376,000  2,250,000 -2,149,000 -3,819,000  2,105,000 -3,997,000   582,000 -523,000         -348,000 -337,250  -1,157,000  -58,000 -1,157,000    -2,733,000        -1,289,000    -89,000                    -1,190,000  -159,000  -525,000              -798,000 -55,000 -488,000  -637,000 -1,016,000   
      net income attributable to noncontrolling interests
            -281,000   -656,000 78,000   567,000      -68,500 -154,000 -41,000 -79,000                                                                       
      long-lived asset impairment and other
                 178,500 1,214,000                                                                                 
      loss on warrants
                   -14,175,000                                                                                
      long-lived asset impairment credit
                    -500,000                                                                               
      affiliate credit loss impairment credit
                                                                                                   
      net loss attributable to tidewater inc.
                   -25,581,000 -12,168,000 -37,934,000 -26,258,000 -29,462,000 -35,315,000 -29,247,000 -37,927,000 -110,623,000 -18,445,000 -44,200,000 -15,959,000 -39,172,000 -20,252,000 -30,896,000 -524,434,000 -94,855,000 -15,693,000 -524,434,000 -94,855,000 -297,676,000 -178,490,000 -89,097,000 -19,599,000 -19,509,000                                                        
      basic loss per common share
                   -610 -290 -920 -640 -720 -870 -710 -940 -2,740 -460 -1,150 -420 -1,670 1,410 -1,160 -11,130 -2,010 -810 -11,130 -2,010 -6,320 -3,790 -1,890 -417.5 -420                                                        
      diluted loss per common share
                   -610 -290 -920 -640 -720 -870 -710 -940 -2,740 -460 -1,150 -420 -1,670 1,410 -1,160 -11,130 -2,010 -810 -11,130 -2,010 -6,320 -3,790 -1,890 -417.5 -420                                                        
      total other income
                    257,000           -23,514,000                                                                    
      long-lived asset impairments
                     541,750 2,167,000   16,908,500 1,945,000 55,482,000 10,207,000                                                                       
      affiliate credit loss impairment expense
                     1,400,000  -1,000,000  -600,000  53,581,000                                                                        
      affiliate guarantee obligation
                           2,000,000                                                                        
      dividend income from unconsolidated company
                           17,150,000                                                                        
      revenues: - sum
                           102,344,000 116,368,000    74,071,500 99,192,000 115,106,000 160,749,000 74,300,000 115,106,000 110,215,500 129,215,000 143,722,000 167,925,000 198,722,000 218,191,000 271,923,000 304,774,000 324,762,000 387,554,000 397,524,000 385,677,000 367,833,000 365,248,000     311,918,000    250,894,000 254,607,000 253,988,000 271,775,000 267,100,000 262,525,000 259,996,000 286,505,000 295,524,000 326,609,000 341,617,000 362,335,000                            
      costs and expenses: - sum
                           220,089,000 134,901,000    83,426,500 124,278,000 320,480,000 230,089,000 80,082,000 320,480,000 237,343,750 416,249,000 299,066,000 234,060,000 201,960,750 227,591,000 289,567,000 290,685,000 299,090,000 601,134,000 312,801,000 319,673,000 306,770,000 344,760,000     254,721,000    256,375,000 223,146,000 229,413,000 229,173,000 240,208,000    223,497,000                               
      other income: - sum
                           9,811,000 -5,162,000                                                                       
      total revenues
                             119,765,000 125,859,000 91,493,000                                                                    
      asset impairments
                             5,224,000  6,186,000 6,063,500 16,853,000 163,423,000 64,857,000  163,423,000 64,857,000 253,422,000 129,562,000 36,886,000 55,540,000 15,141,000 31,672,000                                                       
      total operating costs and expenses
                             142,316,000 130,253,000 103,687,000                                                                    
      less: net income attributable to noncontrolling interests
                             394,000 406,000 143,000 -96,500 -287,000 24,000 7,883,000 166,000 24,000 7,883,000 903,000 867,000 454,000                                                          
      dilutive effect of stock options and restricted stock
                                                230,841,000 282,986,000 -149,393,000 482,818,000 448,303,000 331,090,000 -37,020,000 221,738,000 232,097,000 174,686,000 -3,554,000 206,329,000 281,129,000 315,527,000 33,820,000 306,647,000 153,819,000 233,924,000    199,264,000    295,455,000                          
      vessel operating leases
                                  5,542,000 8,443,000 1,124,000 5,542,000 8,443,000 8,441,000 8,441,000 8,441,000 8,337,000 8,441,000 8,441,000 8,443,000 8,075,000 7,165,000 6,542,000 6,540,000 8,151,000 5,757,000 3,971,000 4,031,000                                              
      other income
                                                                                                   
      reorganization items
                                  -313,176,000  -1,880,000 -313,176,000                                                              
      restructuring charge
                                            7,586,000                                                       
      goodwill impairment
                                               283,699,000    56,283,000         30,932,000                                       
      less: net losses attributable to noncontrolling interests
                                          177,000 -94,000                                                        
      earnings before income taxes
                                            -32,611,000    81,892,000 57,491,000 51,239,000 12,387,000 69,839,000 39,583,000 59,451,000 37,418,000 55,063,000 43,231,000 46,254,000 37,255,000  31,893,000 25,345,000 44,294,000 29,584,000 48,872,000 59,443,000 70,781,000 75,384,000 62,126,000 132,395,000 139,356,000 117,624,000 102,140,000 104,376,000 107,686,000 105,431,000 108,076,000 110,266,000 115,389,000 129,915,000 95,265,000 84,884,000 80,855,000 118,773,000 39,000,000 27,820,000 29,048,000 23,985,000 18,942,000 -15,968,000 25,250,000 18,290,000 26,931,000 23,945,000 35,018,000 34,609,000 34,138,000  
      net earnings
                                            -43,999,000    60,825,000 43,699,000 43,417,000 12,583,000 54,172,000 30,083,000 46,591,000 29,947,000 41,356,000 32,856,000 33,642,000 34,087,000 -4,876,000 24,558,000 12,019,000 34,363,000 19,403,000 39,831,000 56,913,000 59,896,000 98,185,000 44,482,000 109,726,000 116,965,000 95,431,000 84,776,000 85,385,000 89,370,000 86,466,000 87,542,000 87,597,000 93,409,000 104,191,000 71,449,000 64,682,000 60,022,000 82,192,000 28,860,000 52,396,000 19,753,000 16,309,000 12,881,000 -6,963,000 18,327,000 12,254,000 18,044,000 18,589,000 23,637,000 23,361,000 23,043,000  
      less: net earnings attributable to noncontrolling interests
                                            -164,000    -82,000 26,000                                                  
      net earnings attributable to tidewater inc.
                                            -43,835,000    60,907,000 43,673,000                                                  
      basic earnings per common share
                                            -930    1,230  880 250 1,100 610 940 610 840 650 660 670 -100 480 230 670 380 780 1,100 1,170 1,910 870 2,130 2,280 1,860 1,650 1,630 1,670 1,570 1,560 1,580 1,690 1,870 1,250                  
      diluted earnings per common share
                                            -930    1,220  870 250 1,090 610 940 610 830 650 660 670 -90 480 230 670 380 770 1,090 1,160 1,900 860 2,130 2,280 1,850 1,640 1,630 1,660 1,560 1,550 1,560 1,670 1,860 1,230 1,110 1,040 1,420 500 920 340 290 230 -130 320 220 320 330 420 410 410  
      basic earnings attributable to tidewater inc. per common share
                                                 880                                                  
      diluted earnings attributable to tidewater inc. per common share
                                                 880                                                  
      less: net loss attributable to noncontrolling interests
                                                                                                   
      cash dividends declared per common share
                                                  187.5 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150  
      income taxes
                                                     9,500,000    10,375,000    7,335,000    9,041,000    17,644,000 15,487,000 22,391,000 22,193,000 17,364,000 14,453,750 18,316,000 18,965,000 20,534,000 17,880,000 21,980,000 25,724,000 23,816,000 16,888,500 20,833,000 36,581,000 10,140,000 5,758,000 9,295,000 7,676,000 6,061,000 -9,005,000 6,923,000 6,036,000 8,887,000 5,356,000 11,381,000 11,248,000 11,095,000  
      other marine revenues
                                                      2,718,250 4,423,000 2,096,000  1,349,750 1,625,000 2,482,000  1,274,000 2,142,000 230,000 529,000 1,340,000 11,998,000 961,000 16,173,000 6,757,250 13,154,000 2,192,000 11,683,000 9,453,500 3,545,000 21,678,000 12,591,000 6,456,000 7,422,000 2,665,000 11,135,000 11,266,000 6,473,000 6,121,000 6,775,000 5,163,000 17,517,000 5,621,000 8,323,000 9,731,000 7,310,000 5,167,000 4,474,000 2,750,000 2,371,000 2,601,000 3,546,000  
      costs of other marine revenues
                                                      2,321,000 4,176,000 1,585,000  1,300,000 1,938,000 2,031,000  1,257,000 2,705,000 203,000 495,000 1,240,000 10,565,000 882,000 14,700,000 6,191,000 11,347,000 1,315,000 10,429,000 14,444,000 1,747,000 19,485,000 11,747,000 5,713,000 6,544,000 1,948,000 9,914,000 9,086,000 5,226,000 4,934,000 4,590,000 3,539,000 15,007,000 4,093,000 6,814,000 8,027,000 6,022,000 4,273,000 3,180,000 1,809,000 1,294,000 1,541,000 2,005,000  
      earnings (loss ) before income taxes
                                                            -4,366,000                                       
      provision for venezuelan operations
                                                                  -5,350,000  517,000 48,553,000                              
      incremental common shares from stock options
                                                                  3,820,000 280,962,000 234,171,000  -20,373,000 74,288,000 239,236,000  -55,847,000 315,409,000 447,266,000 446,798,000 -20,678,000 604,569,000 525,457,000 711,830,000 63,014,000 696,163,000 545,266,000 351,098,000 76,987,000 233,024,000 142,302,000 62,046,000 18,611,000 89,376,000 82,030,000 145,058,000 -19,385,000 120,739,000 101,259,000 404,209,000  
      gain on assets dispositions
                                                                    -5,374,000                               
      gain on sales of assets
                                                                         -10,387,000  -660,000 -2,102,000 -6,930,000  -8,803,000 -28,439,000 -2,713,000  -5,275,000 -68,553,000 -1,634,000  -2,837,000 -1,247,000 -6,433,000 -11,864,000 199,000 2,304,000 2,286,000 1,287,000 -12,000 3,330,000 1,557,000  
      minority interests
                                                                            -85,000 -44,000  -41,000 -248,000 20,000 -43,000 22,000 28,000 -23,000  -36,000 53,000 -40,000  -70,000 -34,000 -57,000  -20,000 -14,000 -33,000  
      interest and miscellaneous income
                                                                            4,146,000 5,685,000 6,581,000 5,144,000 3,733,000 4,777,000 4,715,000 2,429,000 1,612,000 1,205,000 847,000 695,000 611,000 581,000 621,000 589,000 972,000 714,000 431,000 430,000 413,000 518,000  
      impairment on long-lived assets
                                                                                  762,500 3,050,000                
      earnings per common share
                                                                                  747.5 1,050 1,440 500 920 350 290 230 -120 320 220 320 330 420 410 410  
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 2004-09-30 2004-06-30 2004-03-31 2003-12-31 2003-09-30 2003-06-30 2003-03-31 2002-12-31 2002-09-30 2002-06-30 2002-03-31 
                                                                                                     
        assets
                                                                                                     
        current assets:
                                                                                                     
        cash and cash equivalents
      552,280,000 578,761,000 428,225,000 369,405,000 341,799,000 324,918,000 280,840,000 315,897,000 280,853,000 274,437,000 275,070,000 171,261,000 165,145,000 164,192,000 115,014,000 87,981,000 136,234,000 149,037,000 127,414,000 131,157,000 131,858,000 149,933,000 192,243,000 203,119,000 187,802,000 359,332,000 369,549,000 391,060,000 371,791,000 461,088,000 459,286,000 442,472,000 459,978,000 683,778,000 706,404,000 649,804,000 674,923,000 668,660,000 678,438,000 47,980,000 88,216,000 102,984,000 78,568,000 77,388,000 124,315,000 53,451,000 60,359,000 114,146,000 45,534,000 64,813,000 40,569,000 54,187,000 136,729,000 240,574,000 320,710,000 188,347,000 302,186,000 196,423,000 245,720,000 308,041,000 51,653,000 122,877,000 223,070,000 336,573,000 295,655,000 314,906,000 250,793,000 201,898,000 144,552,000 184,670,000 270,205,000 228,602,000 320,983,000 354,593,000 393,806,000 340,813,000 257,003,000 224,298,000 246,109,000 167,064,000 125,713,000 15,143,000 15,376,000 16,042,000 11,819,000 14,033,000 17,636,000 15,919,000 37,353,000 10,668,000 17,767,000 7,923,000 10,845,000 17,309,000 11,882,000 
        trade and other receivables, net of allowance for credit losses of 2,949 and 3,034 at march 31, 2026 and december 31, 2025, respectively
      299,735,000                                                                                               
        marine operating supplies
      29,404,000 38,482,000 27,857,000 24,467,000 23,101,000 34,319,000 26,670,000 26,908,000 24,767,000 31,933,000 27,489,000 22,495,000 24,448,000 30,830,000 20,764,000 21,182,000 13,252,000 12,606,000 13,335,000 15,404,000 15,676,000 15,876,000 17,808,000 20,580,000 21,944,000 21,303,000 29,141,000 29,337,000 29,505,000 27,591,000 28,930,000 28,896,000 31,083,000 31,097,000 30,560,000 30,720,000 31,124,000 32,125,000 33,413,000 38,719,000 37,135,000 43,255,000 49,005,000 55,284,000 63,531,000 63,214,000 57,392,000 55,711,000 53,744,000 62,007,000 62,348,000 61,251,000 56,131,000 55,812,000 53,850,000 52,488,000 53,517,000 55,181,000 50,748,000 49,169,000 48,522,000 45,864,000 44,237,000 46,105,000 43,331,000 47,627,000 48,727,000 51,104,000 54,684,000 47,754,000 46,369,000 44,205,000 40,355,000 41,858,000 44,902,000 43,574,000 43,297,000 42,295,000 41,181,000 40,351,000 36,459,000 37,695,000 38,959,000 37,517,000 39,090,000 40,405,000 37,919,000 39,946,000 36,726,000 34,959,000 31,277,000 32,145,000 29,766,000 27,989,000 28,071,000 
        prepaid expenses and other current assets
      18,195,000 11,520,000 11,652,000 14,123,000 15,160,000 13,588,000 18,117,000 20,115,000 17,447,000 15,172,000 16,598,000 18,958,000 18,978,000 20,985,000 17,509,000 23,259,000 12,012,000 8,731,000 13,129,000 15,953,000 13,594,000 11,692,000 18,925,000 20,350,000 22,185,000                                                                       
        total current assets
      899,614,000 914,135,000 800,330,000 724,507,000 698,198,000 698,662,000 625,971,000 646,945,000 615,509,000 591,135,000 575,366,000 410,492,000 396,436,000 377,908,000 346,713,000 329,783,000 309,191,000 342,672,000 350,093,000 355,163,000 363,742,000 388,649,000 440,815,000 473,767,000 518,193,000 644,941,000 669,878,000 674,118,000 683,302,000 768,387,000 797,331,000 816,069,000 871,201,000 1,118,916,000 1,141,287,000 1,164,504,000 1,248,528,000 1,281,154,000 1,323,314,000 745,201,000 786,559,000 834,812,000 868,815,000 873,111,000 896,905,000 871,294,000 820,209,000 803,911,000 681,755,000 619,173,000 508,090,000 489,984,000 541,781,000 639,563,000 694,100,000 538,371,000 658,043,000 563,593,000 579,147,000 653,030,000 415,371,000 498,648,000 585,627,000 691,891,000 685,470,000 713,841,000 634,451,000 592,808,000 548,473,000 578,023,000 630,595,000 600,333,000 666,718,000 687,078,000 731,549,000 658,652,000 573,962,000 535,206,000 529,043,000 444,000,000 381,721,000 251,266,000 227,956,000 229,086,000 228,603,000 227,609,000 224,637,000 226,588,000 245,777,000 221,758,000 213,492,000 197,041,000 196,543,000 205,109,000 226,581,000 
        net properties and equipment
      1,069,081,000 1,072,020,000 1,104,503,000 1,132,114,000 1,163,758,000 1,184,282,000 1,220,056,000 1,253,583,000 1,286,618,000 1,315,122,000 1,348,001,000 784,873,000 786,168,000 796,655,000 815,990,000 838,612,000 677,580,000 688,040,000 709,324,000 731,659,000 754,707,000 780,318,000 820,876,000 839,912,000 922,979,000    1,089,857,000 776,640,000 803,725,000 814,263,000 868,689,000 2,659,314,000 2,864,762,000 3,009,407,000 3,311,567,000 3,475,436,000 3,551,291,000 3,607,301,000 3,658,006,000 3,719,206,000 3,746,307,000 3,675,421,000 3,649,987,000 3,615,174,000 3,621,608,000 3,546,476,000 3,531,349,000 3,542,268,000 3,189,819,000 3,098,652,000 3,012,023,000 2,938,736,000 2,905,765,000 2,880,693,000 2,788,808,000 2,732,899,000 2,701,780,000 2,636,820,000 2,562,365,000 2,365,377,000 2,253,824,000 2,144,401,000 2,090,060,000 2,014,829,000 2,013,325,000 1,945,248,000 1,872,324,000 1,775,454,000 1,679,038,000 1,666,999,000 1,623,968,000 1,564,119,000 1,482,097,000 1,430,739,000 1,419,110,000 1,381,576,000 1,373,727,000 1,370,345,000 1,358,527,000 1,468,622,000 1,452,186,000 1,428,842,000 1,406,668,000 1,387,963,000 1,342,494,000 1,346,502,000 1,314,670,000 1,277,210,000 1,165,921,000 1,138,084,000 1,106,206,000 1,062,402,000 998,411,000 
        deferred drydocking and survey costs
      147,871,000 139,736,000 154,234,000 165,659,000 169,326,000 152,550,000 160,944,000 148,657,000 128,639,000 106,698,000 99,215,000 92,481,000 82,787,000 61,080,000 57,877,000 53,661,000 44,362,000 40,734,000 40,510,000 40,372,000 46,648,000 56,468,000    49,025,000 41,029,000 30,602,000 22,215,000 16,053,000 14,372,000 11,430,000 388,000                                                               
        indemnification assets
      8,273,000 9,455,000 9,456,000 11,158,000 11,114,000 11,946,000 12,216,000 10,920,000 16,642,000 17,370,000 18,648,000 22,678,000 27,698,000 28,369,000 30,117,000 30,269,000                                                                                
        deferred tax assets
      190,614,000                                                                                               
        other assets
      25,217,000 50,626,000 60,357,000 40,934,000 23,770,000 27,464,000 27,944,000 29,643,000 30,408,000 32,449,000 30,325,000 33,640,000 34,058,000 33,644,000 32,364,000 30,410,000 22,997,000 24,334,000 23,146,000 24,539,000 23,833,000 25,742,000 25,108,000 27,411,000 29,971,000 37,269,000 39,651,000 38,507,000 31,326,000 28,700,000 26,779,000 30,783,000 46,845,000 92,134,000 139,535,000 98,772,000 89,967,000 84,279,000 78,440,000 82,350,000 103,680,000 96,765,000 75,196,000 102,616,000 101,071,000 92,751,000 96,385,000 153,260,000 149,239,000 144,708,000 126,277,000 113,842,000 120,354,000 118,452,000 117,854,000 117,633,000 113,119,000 110,901,000 99,391,000 100,472,000 89,772,000 88,107,000 84,538,000 98,760,000 95,055,000 81,521,000 60,053,000 70,520,000 88,732,000 94,031,000 85,960,000 91,127,000 99,338,000 100,815,000 82,475,000 86,920,000 72,798,000 79,668,000 98,708,000 116,971,000 132,141,000 175,850,000 172,203,000 175,242,000 166,232,000 155,962,000 152,183,000 139,009,000 130,354,000 116,964,000 113,966,000 117,710,000 120,738,000 112,478,000 101,902,000 
        total assets
      2,340,670,000 2,386,911,000 2,128,880,000 2,074,372,000 2,066,166,000 2,074,904,000 2,047,131,000 2,089,748,000 2,077,816,000 2,062,774,000 2,071,555,000 1,344,164,000 1,327,147,000 1,297,656,000 1,283,061,000 1,282,735,000 1,054,130,000 1,095,780,000 1,123,073,000 1,151,733,000 1,188,930,000 1,251,177,000 1,350,774,000 1,415,675,000 1,553,124,000 1,754,021,000 1,792,270,000 1,809,298,000 1,827,739,000 1,590,909,000 1,643,542,000 1,686,048,000 1,812,852,000 3,919,580,000 4,190,699,000 4,315,199,000 4,688,262,000 4,877,858,000 4,990,547,000 4,480,515,000 4,607,665,000 4,713,484,000 4,756,162,000 4,716,626,000 5,002,465,000 4,930,844,000 4,885,829,000 4,847,445,000 4,754,579,000 4,697,042,000 4,168,055,000 4,055,664,000 4,022,088,000 4,042,264,000 4,061,618,000 3,877,867,000 3,896,207,000 3,776,930,000 3,748,116,000 3,755,540,000 3,428,593,000 3,323,482,000 3,293,357,000 3,301,720,000 3,233,217,000 3,180,594,000 3,073,804,000 2,970,507,000 2,866,978,000 2,801,921,000 2,751,780,000 2,710,698,000 2,744,394,000 2,703,148,000 2,649,298,000 2,533,050,000 2,421,289,000 2,349,229,000 2,364,540,000 2,295,310,000 2,235,298,000 2,257,429,000 2,213,173,000 2,195,664,000 2,164,020,000 2,133,558,000 2,081,790,000 2,067,058,000 2,045,940,000 1,971,340,000 1,849,578,000 1,809,580,000 1,781,172,000 1,737,849,000 1,669,370,000 
        liabilities and equity
                                                                                                     
        current liabilities:
                                                                                                     
        accounts payable
      58,238,000 66,347,000 42,579,000 48,715,000 50,203,000 71,385,000 64,058,000 60,740,000 51,774,000 44,931,000 57,183,000 69,822,000 64,775,000 38,946,000 31,829,000 30,537,000 23,696,000 20,788,000 18,042,000 16,189,000 14,622,000 16,981,000 12,953,000 17,111,000 30,711,000 23,672,000 24,170,000 29,739,000 31,939,000 30,571,000 30,561,000 45,781,000 39,439,000 35,087,000 31,599,000 50,754,000 64,231,000 53,743,000 49,130,000 61,019,000 60,710,000 58,659,000 54,011,000 49,487,000 63,346,000 74,814,000 74,515,000 95,247,000 89,689,000 75,976,000 63,602,000 81,981,000 89,560,000 92,675,000 74,115,000 50,712,000 55,259,000 47,885,000 45,177,000 41,938,000 42,195,000 34,389,000 41,673,000 39,674,000 51,637,000 52,800,000 104,663,000 81,517,000 84,377,000 91,724,000 93,147,000 79,542,000 70,396,000 78,160,000                      
        accrued expenses
      139,525,000 153,169,000 130,879,000 131,305,000 133,000,000 129,894,000 117,878,000 133,149,000 132,190,000 125,590,000 119,631,000 91,875,000 107,348,000 105,518,000 105,945,000 109,212,000 55,141,000 51,734,000 52,133,000 50,532,000 48,466,000 52,422,000       61,784,000 46,060,000 49,312,000 56,408,000 61,115,000 63,155,000 78,121,000 67,412,000 76,085,000 71,967,000 91,611,000 96,604,000 136,952,000 118,162,000 146,255,000 149,523,000 144,135,000 131,355,000 157,302,000 186,473,000 168,185,000 170,784,000 159,086,000 147,498,000 144,446,000 139,634,000 134,953,000 129,540,000 131,067,000 121,727,000 120,869,000 123,256,000 140,256,000 137,443,000 119,485,000 144,294,000 118,922,000 129,331,000 58,020,000 64,700,000 54,838,000 56,248,000 54,497,000 62,673,000 53,657,000 50,868,000                      
        current portion of long-term debt
      5,760,000 5,845,000 5,840,000 93,366,000 80,042,000 65,386,000 53,105,000 102,993,000 103,009,000 103,077,000 102,369,000 2,441,000       140,995,000 7,355,000 18,201,000 27,797,000 9,576,000 9,437,000 9,104,000 9,689,000 10,002,000 9,957,000 8,568,000 7,671,000 6,290,000 5,215,000 5,174,000 10,106,000 2,034,124,000 2,036,060,000 2,041,367,000 2,041,406,000 2,052,270,000 9,810,000 10,000,000 45,420,000 10,181,000    9,512,000                                                 
        other current liabilities
      66,402,000 89,876,000 97,162,000 69,688,000 74,299,000 64,948,000 38,532,000 43,342,000 52,164,000 55,133,000 53,301,000 42,305,000 43,220,000 50,323,000 46,629,000 47,872,000 25,471,000 23,865,000 29,139,000 28,825,000 35,003,000 32,785,000 31,599,000 25,815,000 26,953,000 30,024,000 24,442,000 20,115,000 18,366,000 18,894,000 17,815,000 8,826,000 38,041,000 28,029,000 48,429,000 50,274,000 60,345,000 63,968,000 74,825,000 66,253,000 75,530,000 74,483,000 82,461,000 79,235,000 73,953,000 71,489,000 70,567,000 53,677,000 39,334,000 40,218,000 39,808,000 31,089,000 26,040,000 25,321,000 26,225,000 22,740,000 21,711,000 19,709,000 13,697,000 29,485,000 27,825,000 29,476,000 13,745,000 45,766,000 44,925,000 43,202,000 35,146,000 46,467,000 52,295,000 52,909,000 34,930,000 35,206,000 30,723,000 30,116,000 17,259,000 20,336,000 12,223,000 18,214,000 11,266,000                 
        total current liabilities
      269,925,000 315,237,000 276,460,000 343,074,000 337,544,000 331,613,000 273,573,000 340,224,000 339,137,000 328,731,000 332,484,000 206,443,000 215,343,000 194,787,000 184,403,000 187,621,000 125,499,000 157,942,000 299,880,000 162,660,000 172,648,000 183,179,000 163,294,000 162,159,000 189,635,000 159,853,000 154,349,000 156,081,000 158,355,000 153,707,000 169,121,000 197,217,000 259,185,000 260,172,000 2,328,713,000 2,340,910,000 2,421,555,000 2,431,983,000 2,459,128,000 407,072,000 452,594,000 492,230,000 482,234,000 446,038,000 421,979,000 409,773,000 401,681,000 339,169,000 301,307,000 291,306,000 266,629,000 263,924,000 263,441,000 321,156,000 238,929,000 206,779,000 211,862,000 193,230,000 183,589,000 198,588,000 214,198,000 205,231,000 204,712,000 260,385,000 246,251,000 231,321,000 203,350,000 198,652,000 197,595,000 216,824,000 198,904,000 219,611,000 214,128,000 193,378,000 146,680,000 136,906,000 123,710,000 119,795,000 115,754,000 99,521,000 94,256,000 85,570,000 92,242,000 94,271,000 83,039,000 85,772,000 72,052,000 71,302,000 72,768,000 75,825,000 72,266,000 67,640,000 68,831,000 68,121,000 73,690,000 
        long-term debt
      648,616,000 649,048,000 649,802,000 531,874,000 555,994,000 571,710,000 597,352,000 607,998,000 620,329,000 631,361,000 641,301,000 179,573,000 169,423,000 169,036,000 168,649,000 168,279,000 167,997,000 167,885,000 14,139,000 148,612,000 148,337,000 164,934,000 246,179,000 273,215,000 273,015,000 419,905,000 424,911,000 427,436,000 430,436,000 435,301,000 438,559,000 442,729,000 445,677,000 80,863,000      1,441,924,000 1,488,379,000 1,498,109,000 1,524,295,000 1,484,326,000 1,496,203,000 1,500,960,000 1,505,358,000 1,464,018,000 1,445,628,000 1,475,062,000 1,000,000,000 930,000,000 890,000,000 890,000,000 950,000,000 825,000,000 825,000,000 700,000,000 700,000,000 700,000,000 390,000,000 300,000,000 275,000,000 275,000,000 275,000,000 300,000,000 300,000,000 300,000,000 300,000,000 300,000,000 300,000,000 300,000,000 300,000,000 300,000,000 300,000,000 300,000,000 300,000,000 300,000,000 300,000,000 300,000,000 300,000,000 395,000,000 380,000,000 375,000,000 380,000,000 365,000,000 325,000,000 310,000,000 300,000,000 245,000,000 139,000,000 119,000,000 109,000,000 99,000,000 54,000,000 
        other liabilities
      58,140,000 61,372,000 63,594,000 63,197,000 62,263,000 60,396,000 62,366,000 62,539,000 63,197,000 64,985,000 66,246,000 65,621,000 68,968,000 67,843,000 82,910,000 85,188,000 70,892,000 68,184,000 74,442,000 80,723,000 79,234,000 79,792,000 87,724,000 90,301,000 91,578,000 96,499,000 97,471,000 98,096,000  53,781,000 57,685,000 58,060,000                                                                
        commitments and contingencies
                                                                                                     
        equity:
                                                                                                     
        common stock of 0.001 par value...
      50,000 50,000 50,000 50,000 51,000 52,000 52,000 52,000 53,000 52,000 53,000 51,000 51,000 51,000 46,000 42,000 42,000 41,000 41,000 41,000 41,000 41,000 40,000 40,000 40,000 39,000 38,000 37,000 37,000                                                                   
        additional paid-in capital
      1,660,121,000 1,663,247,000 1,659,820,000 1,656,626,000 1,652,856,000 1,656,830,000 1,653,027,000 1,649,523,000 1,646,061,000 1,671,759,000 1,668,392,000 1,554,793,000 1,553,919,000 1,556,990,000 1,555,388,000 1,554,561,000 1,376,934,000 1,376,494,000 1,375,215,000 1,373,727,000 1,372,846,000 1,371,809,000 1,370,778,000 1,369,645,000 1,368,325,000 1,365,872,000 1,359,842,000 1,356,436,000 1,352,388,000 1,063,603,000 1,064,039,000 1,061,983,000  165,516,000 165,221,000 171,018,000 169,443,000 168,264,000 166,604,000 168,753,000 165,790,000 162,707,000 159,940,000 158,501,000 153,513,000 148,216,000 142,381,000 138,095,000 133,386,000 125,872,000 119,975,000 117,981,000 112,606,000 107,754,000 102,726,000 98,097,000 95,848,000 92,719,000 90,204,000 83,586,000 79,730,000 76,494,000 88,173,000 82,046,000                                
        accumulated deficit
      -299,017,000 -305,157,000 -525,041,000 -524,235,000 -545,890,000 -548,831,000 -541,191,000 -573,390,000 -594,347,000 -637,838,000 -640,128,000 -666,327,000 -688,911,000 -699,649,000 -710,269,000 -715,649,000 -690,068,000 -677,900,000 -639,966,000 -613,708,000 -584,246,000 -548,931,000 -519,684,000 -481,757,000 -371,134,000 -292,673,000 -248,473,000 -232,514,000 -210,783,000                                                                   
        accumulated other comprehensive income
      7,133,000 7,248,000 7,894,000 7,273,000 6,607,000 6,060,000 4,592,000 5,062,000 5,209,000 5,266,000 4,413,000 4,566,000 8,254,000 8,576,000    2,668,000     1,106,000 581,000 133,000 2,194,000 2,194,000 2,194,000 2,194,000                                                                   
        total stockholders’ equity
      1,368,287,000 1,365,388,000 1,142,723,000 1,139,714,000 1,113,624,000 1,114,111,000 1,116,480,000 1,081,247,000 1,056,976,000 1,039,239,000 1,032,730,000 893,083,000 873,313,000 865,968,000 846,639,000 840,717,000 689,379,000 701,303,000 734,001,000 758,978,000 787,766,000 822,115,000 852,240,000 888,509,000 997,364,000 1,075,432,000 1,113,601,000 1,126,153,000 1,143,836,000 942,953,000 974,284,000 983,123,000 1,040,973,000 1,110,865,000 1,634,918,000 1,739,306,000 2,035,408,000 2,212,507,000 2,299,520,000 2,370,075,000 2,398,041,000 2,451,053,000 2,474,488,000 2,502,721,000 2,770,394,000 2,716,650,000 2,679,384,000 2,639,988,000 2,634,567,000 2,585,467,000 2,561,756,000 2,526,311,000 2,520,277,000 2,486,077,000 2,526,357,000 2,501,224,000 2,512,560,000 2,528,143,000 2,513,944,000 2,506,138,000 2,479,825,000 2,474,145,000 2,464,030,000 2,418,590,000 2,368,694,000 2,280,064,000 2,244,678,000 2,143,828,000 2,042,320,000 1,957,558,000 1,930,084,000 1,866,985,000 1,909,719,000 1,882,017,000 1,886,010,000 1,792,427,000 1,696,579,000 1,637,798,000 1,659,121,000 1,592,047,000 1,535,695,000 1,464,197,000  1,396,302,000 1,381,660,000 1,370,997,000  1,377,460,000 1,366,947,000 1,362,358,000  1,338,830,000 1,322,680,000 1,304,200,000  
        noncontrolling interests
      -4,298,000 -4,134,000 -3,699,000 -3,487,000 -3,259,000 -2,926,000 -2,640,000 -2,260,000 -1,823,000 -1,542,000 -1,206,000 -556,000 100,000 22,000 460,000 930,000 363,000 466,000 611,000 760,000 945,000 1,157,000 1,337,000 1,491,000 1,532,000 2,332,000 1,938,000 1,532,000 1,087,000 955,000 1,242,000 2,358,000 1,841,000 14,965,000 16,141,000 8,258,000 7,355,000 6,488,000 6,034,000 5,857,000 5,951,000 6,115,000 6,227,000 6,044,000 6,330,000 6,412,000                                                  
        total equity
      1,363,989,000 1,361,254,000 1,139,024,000 1,136,227,000 1,110,365,000 1,111,185,000 1,113,840,000 1,078,987,000 1,055,153,000 1,037,697,000 1,031,524,000 892,527,000 873,413,000 865,990,000 847,099,000 841,647,000 689,742,000 701,769,000 734,612,000 759,738,000 788,711,000 823,272,000 853,577,000 890,000,000 998,896,000 1,077,764,000 1,115,539,000 1,127,685,000 1,144,923,000 943,908,000 975,526,000 985,481,000 1,042,814,000 1,125,830,000 1,651,059,000 1,747,564,000 2,042,763,000 2,218,995,000 2,305,554,000 2,375,932,000 2,403,992,000 2,457,168,000 2,480,715,000 2,508,765,000 2,776,724,000 2,723,062,000 2,685,371,000                                                 
        total liabilities and equity
      2,340,670,000 2,386,911,000 2,128,880,000 2,074,372,000 2,066,166,000 2,074,904,000 2,047,131,000 2,089,748,000 2,077,816,000 2,062,774,000 2,071,555,000 1,344,164,000 1,327,147,000 1,297,656,000 1,283,061,000 1,282,735,000 1,054,130,000 1,095,780,000 1,123,073,000 1,151,733,000 1,188,930,000 1,251,177,000 1,350,774,000 1,415,675,000 1,553,124,000 1,754,021,000 1,792,270,000 1,809,298,000 1,827,739,000 1,590,909,000 1,643,542,000 1,686,048,000 1,812,852,000 3,919,580,000 4,190,699,000 4,315,199,000 4,688,262,000 4,877,858,000 4,990,547,000 4,480,515,000 4,607,665,000 4,713,484,000 4,756,162,000 4,716,626,000 5,002,465,000 4,930,844,000 4,885,829,000                                                 
        restricted cash
         21,000 5,234,000 2,032,000 7,259,000 3,527,000 6,474,000 1,241,000 4,973,000 1,242,000 4,972,000 1,241,000 4,965,000 1,240,000 4,958,000 1,240,000 24,092,000 20,284,000 9,061,000 2,079,000 26,401,000 19,880,000 12,461,000 3,300,000 13,614,000 6,975,000 25,953,000 7,466,000 5,213,000 2,847,000                                                                
        trade and other receivables, less allowance for credit losses of 3,034 and 3,184 as of december 31, 2025 and 2024, respectively
       285,372,000                                                                                              
        deferred tax asset
       200,939,000                                                                                              
        liabilities and stockholders' equity
                                                                                                     
        trade and other receivables, net of allowance for credit losses of 3,039 and 3,184 at september 30, 2025 and december 31, 2024, respectively
        332,596,000                                                                                             
        trade and other receivables, net of allowance for credit losses of 3,031 and 3,184 at june 30, 2025 and december 31, 2024, respectively
         316,491,000                                                                                            
        trade and other receivables, net of allowance for credit losses of 3,144 and 3,184 at march 31, 2025 and december 31, 2024, respectively
          312,904,000                                                                                           
        trade and other receivables, less allowance for credit losses of 3,184 and 15,914 as of december 31, 2024 and 2023, respectively
           323,805,000                                                                                          
        trade and other receivables, net of allowance for credit losses of 3,086 and 15,914 at september 30, 2024 and december 31, 2023, respectively
            293,085,000                                                                                         
        trade and other receivables, net of allowance for credit losses of 3,350 and 15,914 at june 30, 2024 and december 31, 2023, respectively
             280,498,000                                                                                        
        trade and other receivables, net of allowance for credit losses of 3,687 and 15,914 at march 31, 2024 and december 31, 2023, respectively
              285,968,000                                                                                       
        trade and other receivables, less allowance for credit losses of 15,914 and 14,060 as of december 31, 2023 and 2022, respectively
               268,352,000                                                                                      
        assets held for sale
                565,000 630,000 695,000 4,195,000 6,815,000 6,862,000 8,591,000 14,421,000 17,891,000 17,214,000 31,214,000 34,396,000 19,163,000 29,064,000 26,142,000                                                                       
        trade and other receivables, net of allowance for credit losses of 15,448 and 14,060 at september 30, 2023 and december 31, 2022, respectively
                250,671,000                                                                                     
        trade and other receivables, less allowance for credit losses of 14,758 and 14,060 at june 30, 2023 and december 31, 2022, respectively
                 195,906,000                                                                                    
        trade and other receivables, less allowance for credit losses of 12,640 and 14,060 at march 31, 2023 and december 31, 2022, respectively
                  182,198,000                                                                                   
        trade and other receivables, less allowance for credit losses of 2,362 and 1,948 as of december 31, 2022 and 2021, respectively
                   156,465,000                                                                                  
        due from affiliates, less allowance for credit losses of 11,698 and 72,456 as of december 31, 2022 and 2021, respectively
                                                                                                     
        due to affiliates
                      21,191,000 61,555,000 59,571,000 59,759,000 56,356,000  53,355,000 48,803,000 50,013,000 41,676,000 39,060,000 40,245,000  48,064,000 62,353,000                                                                 
        trade and other receivables, less allowance for credit losses of 2,568 and 1,948 at september 30, 2022 and december 31, 2021, respectively
                    181,646,000                                                                                 
        due from affiliates, less allowance for credit losses of 11,642 and 72,456 at september 30, 2022 and december 31, 2021, respectively
                                                                                                     
        accumulated other comprehensive loss
                    1,474,000 1,763,000 2,471,000  -1,289,000 -1,082,000 -875,000 -804,000        -403,000 -403,000 -446,000 82,000 -10,258,000 -10,344,000 -6,446,000 -6,443,000 -6,634,000 -6,866,000 -20,237,000 -20,628,000 -20,181,000 -20,378,000  -11,728,000 -11,877,000 -12,225,000 -16,449,000 -16,970,000 -16,913,000 -17,141,000 -16,183,000 -19,302,000 -19,838,000 -19,330,000 -18,766,000 -18,952,000 -18,089,000 -18,184,000 -20,177,000 -21,123,000  -16,931,000 -17,101,000                                
        trade and other receivables, less allowance for credit losses of 2,288 and 1,948 at june 30, 2022 and december 31, 2021, respectively
                     189,259,000                                                                                
        due from affiliates, less allowance for credit losses of 12,215 and 72,456 at june 30, 2022 and december 31, 2021, respectively
                                                                                                     
        trade and other receivables, less allowance for credit losses of 1,987 and 1,948 at march 31, 2022 and december 31, 2021, respectively
                      112,953,000                                                                               
        due from affiliates, less allowance for credit losses of 12,812 and 72,456 at march 31, 2022 and december 31, 2021, respectively
                      21,191,000                                                                               
        trade and other receivables, less allowance for credit losses of 1,948 and 1,516 as of december 31, 2021 and 2020, respectively
                       86,503,000                                                                              
        due from affiliates, less allowance for credit losses of 72,456 and 71,800 as of december 31, 2021 and 2020, respectively
                       70,134,000                                                                              
        trade and other receivables, less allowance for credit losses of 2,134 and 1,516 at september 30, 2021 and december 31, 2020, respectively
                        86,015,000                                                                             
        due from affiliates, less allowance for credit losses of 70,638 and 71,800 at september 30, 2021 and december 31, 2020, respectively
                        68,217,000                                                                             
        trade and other receivables, less allowance for credit losses of 2,099 and 1,516 at june 30, 2021 and december 31, 2020, respectively
                         90,229,000                                                                            
        due from affiliates, less allowance for credit losses of 70,695 and 71,800 at june 30, 2021 and december 31, 2020, respectively
                         64,922,000                                                                            
        trade and other receivables, less allowance for credit losses of 2,136 and 1,516 at march 31, 2021 and december 31, 2020, respectively
                          99,865,000                                                                           
        due from affiliate less allowance for credit losses of 71,595 and 71,800 at march 31, 2021 and december 31, 2020, respectively
                          62,474,000                                                                           
        trade and other receivables, less allowance for credit losses of 1,516 as of december 31, 2020 and less allowance for doubtful accounts of 70 as of december 31, 2019
                           112,623,000                                                                          
        due from affiliate, less allowance for credit losses of 71,800 as of december 31, 2020 and less due from affiliate allowance of 20,083 as of december 31, 2019
                           62,050,000                                                                          
        due to affiliate
                           53,194,000       34,972,000   78,135,000 112,642,000 121,037,000 132,857,000 132,836,000 175,925,000 197,289,000 187,971,000 169,943,000 165,945,000 192,046,000 185,657,000 157,522,000 127,287,000 118,456,000 86,154,000                                                 
        trade and other receivables, less allowance for credit losses of 651 as of september 30, 2020 and less allowance for doubtful accounts of 70 as of december 31, 2019
                            100,583,000                                                                         
        due from affiliate less allowance for credit losses of 72,696 as of september 30, 2020 and less due from affiliate allowance of 20,083 as of december 31, 2019
                            65,692,000                                                                         
        net deferred drydocking and survey costs
                            63,975,000 74,585,000 81,981,000                                                                       
        accrued costs and expenses
                            55,811,000 60,993,000 72,854,000 54,792,000 56,675,000 56,025,000                                                                    
        contingencies
                                                                                                     
        trade and other receivables, less allowance for credit losses of 556 as of june 30, 2020 and less allowance for doubtful accounts of 70 as of december 31, 2019.
                             115,008,000                                                                        
        due from affiliate less allowance for credit losses of 71,959 as of june 30, 2020 and less due from affiliate allowance of 20,083 as of december 31, 2019
                             65,766,000                                                                        
        trade and other receivables, less allowance for credit losses of 579 as of march 31, 2020 and less allowance for doubtful accounts of 70 as of december 31, 2019.
                              119,455,000                                                                       
        due from affiliate
                              128,204,000    132,951,000   207,919,000 245,056,000 252,810,000 262,652,000 287,592,000 300,757,000 341,966,000 338,595,000 336,474,000 346,884,000 385,452,000 420,365,000 421,904,000 407,995,000 430,167,000 429,450,000                                                 
        trade and other receivables
                               123,133,000 121,155,000 112,853,000  88,013,000 96,630,000 115,754,000  116,612,000  174,335,000 209,850,000 201,699,000  261,209,000 269,049,000 262,762,000  301,038,000 276,425,000 291,341,000  615,060,000 558,824,000 467,777,000  361,989,000 333,284,000 322,978,000  287,081,000 287,475,000 293,657,000  282,312,000 301,248,000 312,717,000  296,798,000 333,303,000 334,309,000  331,408,000 337,385,000 332,516,000  320,667,000 296,066,000 279,145,000  268,958,000 266,067,000 258,654,000  232,148,000 213,082,000 189,685,000  171,487,000 171,035,000 164,778,000  165,085,000 164,897,000 165,931,000  154,718,000 152,581,000 156,178,000  
        due from affiliates
                               124,757,000 121,959,000 119,049,000  174,349,000 197,059,000                                                                 
        other current assets
                               13,116,000 14,460,000 14,844,000 11,836,000 9,880,000 10,213,000 18,181,000 14,813,000 34,619,000 18,409,000 22,053,000 31,874,000 36,704,000 44,755,000 60,819,000 45,275,000 40,359,000 17,781,000 17,497,000 24,639,000 33,121,000 20,587,000 18,994,000 23,653,000 24,576,000 11,735,000 12,557,000 15,637,000 20,199,000 10,072,000 10,455,000 14,865,000 18,332,000 10,212,000 13,508,000 13,948,000 17,190,000 6,703,000 12,415,000 13,181,000 16,999,000 6,365,000 8,398,000 11,852,000 13,083,000 5,208,000 6,859,000 9,314,000 11,482,000 6,033,000 5,307,000 7,595,000 9,959,000 4,325,000 4,437,000 6,467,000 8,743,000 3,837,000 4,040,000 6,659,000 8,393,000 3,320,000 5,638,000 6,801,000 10,200,000 3,675,000 2,255,000 3,351,000 3,633,000 4,036,000 
        investments in, at equity, and advances to unconsolidated companies
                                658,000 774,000 1,039,000 1,129,000 1,335,000 13,503,000 25,729,000 49,216,000 45,115,000 42,516,000 38,200,000 36,989,000 37,502,000 45,663,000 59,420,000 62,701,000 65,844,000 65,478,000 70,803,000 67,926,000 63,928,000 60,099,000 52,254,000 49,445,000 46,047,000 55,364,000 50,108,000 47,691,000 46,077,000 43,348,000 38,415,000 40,783,000 39,044,000 36,464,000 32,331,000 42,596,000 40,614,000 37,914,000 33,878,000 41,649,000 37,221,000 33,177,000 28,695,000 25,659,000 27,433,000 23,485,000 25,616,000 22,382,000 24,423,000 27,985,000 26,665,000 24,025,000 34,308,000 35,240,000 34,155,000 32,937,000 32,074,000 33,740,000 33,763,000 33,270,000 33,722,000 26,205,000 26,385,000 26,654,000 27,445,000 27,991,000 28,931,000 29,106,000 13,722,000 
        properties and equipment
                               1,022,786,000 1,041,054,000 1,065,297,000                                                                    
        trade and other receivables, less allowance for doubtful accounts of 2,700 and 1,800 as of december 31, 2018 and december 31, 2017, respectively
                                  111,266,000                                                                   
        accrued property and liability losses
                                  2,726,000 2,447,000 2,790,000 2,852,000 2,774,000 2,758,000 3,583,000 3,574,000 3,602,000 3,610,000 3,321,000 3,443,000 3,457,000 3,460,000 3,669,000 3,265,000 3,238,000 3,264,000 3,631,000 3,772,000 4,099,000 4,328,000 4,133,000 3,356,000 3,395,000 3,526,000 3,636,000 3,787,000 3,825,000 3,909,000 3,846,000 3,909,000 3,922,000 3,923,000 4,809,000 5,651,000 5,767,000 5,988,000 5,521,000 5,968,000 6,085,000 6,167,000 6,271,000 5,973,000 6,097,000 6,166,000 6,130,000 6,841,000 6,861,000 7,111,000 7,223,000 8,368,000 9,119,000 9,193,000 9,286,000 9,913,000 9,684,000 9,222,000 9,125,000 9,583,000 9,679,000 9,515,000 9,648,000 10,210,000 10,749,000 10,080,000 9,737,000 
        other liabilities and deferred credits
                                  89,902,000    62,569,000 60,382,000 154,705,000 159,237,000 164,530,000 174,112,000 181,546,000 210,239,000 224,518,000 230,632,000 235,108,000 226,727,000 188,694,000 184,756,000 179,204,000 206,204,000 174,370,000 144,055,000 139,074,000 120,567,000 130,419,000 127,279,000 128,555,000 124,705,000 128,630,000 129,837,000 128,521,000 126,759,000 124,151,000 125,837,000 125,302,000 125,428,000 122,882,000 151,186,000 116,541,000 120,138,000 120,545,000 123,214,000 120,657,000 123,751,000 122,114,000 120,627,000 101,699,000 104,425,000 103,115,000 94,083,000 92,666,000 95,695,000 89,596,000 82,477,000 79,041,000 66,300,000 63,123,000 62,626,000 75,615,000 56,063,000 56,334,000 52,142,000 53,226,000 50,457,000 49,650,000 48,725,000 48,415,000 
        successor common stock of 0.001 par value...
                                   27,000 26,000 24,000 21,000                                                               
        retained deficit
                                   -120,274,000 -89,378,000 -78,438,000                                                                
        trade and other receivables, less allowance for doubtful accounts of 200 and 16,165 as of september 30, 2017 and march 31, 2017, respectively
                                      120,271,000                                                               
        deferred income taxes
                                        46,013,000 56,375,000 48,204,000 41,514,000 34,841,000 35,600,000 28,323,000 25,618,000 23,276,000 42,540,000 111,312,000 110,146,000 108,929,000 189,182,000 188,771,000 189,266,000 189,763,000 211,440,000 214,515,000 214,586,000 214,627,000 213,520,000 211,423,000 218,571,000 216,735,000 218,751,000 216,258,000 213,867,000 211,504,000 209,431,000 205,920,000 205,473,000 201,200,000 199,036,000 196,279,000 193,006,000 189,605,000 186,356,000 183,574,000 182,048,000 179,687,000 179,863,000 178,802,000 177,177,000 175,267,000 179,903,000 181,634,000 195,458,000 184,410,000 227,798,000 223,784,000 217,285,000 211,982,000 217,610,000 214,475,000 202,679,000 199,543,000 194,712,000 187,638,000 180,530,000 173,422,000 
        predecessor common stock of 0.10 par value, 125,000,000 shares authorized, 47,121,304 shares issued and outstanding at march 31, 2017
                                                                                                     
        predecessor additional paid-in capital
                                                                                                     
        successor additional paid-in capital
                                      1,056,563,000                                                               
        retained earnings
                                      -15,693,000 950,895,000 1,475,329,000 1,570,027,000 1,867,701,000 2,046,170,000 2,135,075,000 2,216,862,000 2,248,182,000 2,303,831,000 2,330,223,000 2,351,197,000 2,623,636,000 2,575,339,000 2,544,255,000 2,513,380,000 2,513,193,000 2,471,557,000 2,453,973,000 2,419,574,000 2,421,991,000 2,393,179,000 2,437,836,000 2,416,777,000 2,430,474,000 2,448,325,000 2,436,736,000 2,437,585,000 2,416,078,000 2,409,524,000 2,402,575,000 2,358,619,000                                
        liabilities subject to compromise
                                       2,389,557,000                                                              
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 47,121,304 shares at june 30, 2017 and 47,121,304 shares at march 31, 2017
                                       4,712,000                                                              
        trade and other receivables, less allowance for doubtful accounts of 16,165 in 2017 and 11,450 in 2016
                                        123,262,000                                                             
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 47,121,304 shares at march 31, 2017 and 47,067,715 shares at march 31, 2016
                                        4,712,000                                                             
        properties and equipment:
                                                                                                     
        vessels and related equipment
                                         4,204,048,000 4,486,959,000 4,604,215,000 4,666,749,000 4,681,306,000 4,696,526,000 4,714,193,000 4,717,132,000 4,630,902,000 4,564,784,000 4,519,296,000 4,521,102,000 4,465,661,000 4,533,231,000 4,589,777,000 4,250,169,000 4,151,491,000 4,063,067,000 3,984,630,000 3,952,468,000 3,977,687,000 3,881,444,000 3,942,046,000 3,910,430,000 3,837,234,000 3,769,478,000 3,561,934,000 3,455,322,000 3,324,728,000 3,263,720,000 3,186,468,000 3,238,674,000 3,170,546,000 3,082,637,000 2,975,735,000 2,867,391,000 2,829,525,000 2,758,613,000 2,671,656,000 2,609,324,000 2,533,082,000 2,503,169,000 2,480,799,000 2,457,947,000 2,442,080,000 2,412,698,000 2,524,279,000 2,362,575,000 2,320,426,000 2,286,390,000 2,252,873,000 2,195,863,000 2,305,532,000 2,255,075,000 2,199,850,000 2,077,034,000 2,036,714,000 1,987,726,000 1,931,838,000 1,855,182,000 
        other properties and equipment
                                         77,880,000 78,459,000 91,949,000 92,065,000 120,969,000 120,455,000 119,684,000 119,879,000 98,516,000 98,965,000 97,867,000 97,714,000 65,739,000 65,791,000 66,747,000 83,779,000 86,420,000 93,893,000 93,612,000 93,107,000 93,889,000 92,854,000 91,868,000 85,589,000 85,435,000 84,047,000 83,143,000 82,007,000 82,015,000 81,975,000 81,919,000 81,689,000 83,014,000 83,111,000 82,662,000 82,357,000 81,967,000 81,137,000 80,077,000 51,955,000 50,983,000 50,254,000 50,177,000 50,205,000 50,047,000 49,449,000 49,390,000 41,499,000 41,024,000 41,156,000 41,223,000 41,494,000 41,593,000 41,550,000 41,641,000 41,403,000 41,590,000 42,293,000 42,526,000 41,860,000 
        properties and equipment: - sum
                                         4,281,928,000 4,565,418,000 4,696,164,000  4,802,275,000 4,816,981,000 4,833,877,000 4,837,011,000 4,729,418,000 4,663,749,000 4,617,163,000 4,618,816,000 4,531,400,000   4,333,948,000  4,156,960,000    3,974,298,000 4,033,914,000 3,996,019,000 3,922,669,000 3,853,525,000 3,645,077,000 3,537,329,000 3,406,743,000 3,345,695,000 3,268,387,000 3,320,363,000 3,253,560,000               2,404,074,000             
        less accumulated depreciation and amortization
                                         1,272,521,000 1,253,851,000 1,220,728,000 1,207,523,000 1,194,974,000 1,158,975,000 1,114,671,000 1,090,704,000 1,053,997,000 1,013,762,000 1,001,989,000 997,208,000 984,924,000 1,067,673,000 1,114,256,000 1,144,129,000 1,139,259,000 1,144,937,000 1,139,506,000 1,139,810,000 1,190,883,000 1,185,490,000 1,301,015,000 1,294,239,000 1,285,849,000 1,291,160,000 1,279,700,000 1,283,505,000 1,262,342,000 1,255,635,000 1,253,558,000 1,307,038,000 1,308,312,000 1,293,424,000 1,282,943,000 1,270,710,000 1,244,493,000 1,215,782,000 1,187,614,000 1,179,182,000 1,153,326,000 1,134,313,000 1,149,400,000 1,134,425,000 1,121,782,000 1,103,620,000 1,105,047,000 951,888,000 932,608,000 920,878,000           
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 47,068,450 shares at december 31, 2016 and 47,067,715 shares at march 31, 2016
                                         4,707,000                                                            
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 47,068,079 shares at september 30, 2016 and 47,067,715 shares at march 31, 2016
                                          4,707,000                                                           
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 47,067,715 shares at june 30, 2016 and 47,067,715 shares at march 31, 2016
                                           4,707,000                                                          
        trade and other receivables, less allowance for doubtful accounts of 11,450 in 2016 and 37,634 in 2015
                                            228,113,000                                                         
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 47,067,715 shares at march 31, 2016 and 47,029,359 shares at march 31, 2015
                                            4,707,000                                                         
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 46,969,590 shares at december 31, 2015 and 47,029,359 shares at march 31, 2015
                                             4,697,000                                                        
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 46,967,809 shares at september 30, 2015 and 47,029,359 shares at march 31, 2015
                                              4,697,000                                                       
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 46,965,458 shares at june 30, 2015 and 47,029,359 shares at march 31, 2015
                                               4,696,000                                                      
        trade and other receivables, less allowance for doubtful accounts of 37,634 in 2015 and 35,737 in 2014
                                                303,096,000                                                     
        goodwill
                                                  283,699,000 283,699,000 283,699,000 283,699,000 339,982,000 341,448,000 297,822,000 297,822,000 297,822,000 297,822,000 297,822,000 297,822,000 297,822,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 328,754,000 
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 47,029,359 shares at march 31, 2015 and 49,730,442 shares at march 31, 2014
                                                4,703,000                                                     
        current portion of long term debt
                                                 7,006,000 10,020,000 10,395,000                                                  
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 46,886,453 shares at december 31, 2014 and 49,730,442 shares at march 31, 2014
                                                 4,689,000                                                    
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 49,728,092 shares at september 30, 2014and 49,730,442 shares at march 31, 2014
                                                  4,973,000                                                   
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 49,720,702 shares at june 30, 2014 and 49,730,442 shares at march 31, 2014
                                                   4,972,000                                                  
        trade and other receivables, less allowance for doubtful accounts of 35,737 in 2014 and 46,332 in 2013
                                                    252,421,000                                                 
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 49,730,442 shares at march 31, 2014 and 49,485,832 shares at march 31, 2013
                                                    4,973,000                                                 
        non controlling interests
                                                    5,987,000                                                 
        liabilities and stockholders’ equity
                                                                                                     
        stockholders’ equity:
                                                                                                     
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 49,621,004 shares at december 31, 2013 and 49,485,832 shares at march 31, 2013
                                                     4,962,000                                                
        total liabilities and stockholders’ equity
                                                     4,847,445,000 4,754,579,000 4,697,042,000 4,168,055,000 4,055,664,000 4,022,088,000  4,061,618,000 3,877,867,000 3,896,207,000 3,776,930,000 3,748,116,000 3,755,540,000 3,428,593,000 3,323,482,000 3,293,357,000 3,301,720,000 3,233,217,000   2,970,507,000 2,866,978,000 2,801,921,000 2,751,780,000 2,710,698,000 2,744,394,000 2,703,148,000 2,649,298,000 2,533,050,000 2,421,289,000 2,349,229,000 2,364,540,000 2,295,310,000 2,235,298,000 2,257,429,000 2,213,173,000 2,195,664,000 2,164,020,000 2,133,558,000 2,081,790,000 2,067,058,000 2,045,940,000 1,971,340,000 1,849,578,000 1,809,580,000 1,781,172,000 1,737,849,000 1,669,370,000 
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 49,577,276 shares at september 30, 2013 and 49,485,832 shares at march 31, 2013
                                                      4,958,000                                               
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 49,507,077 shares at june 30, 2013 and 49,485,832 shares at march 31, 2013
                                                       4,951,000                                              
        trade and other receivables, less allowance for doubtful accounts of 46,332 in 2013 and 49,921 in 2012
                                                        393,438,000                                             
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 49,485,832 shares at march 31, 2013 and 51,250,995 shares at march 31, 2012
                                                        4,949,000                                             
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 49,397,616 shares at december 31, 2012 and 51,250,995 shares at march 31, 2012
                                                         4,939,000                                            
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 49,823,682 shares at september 30, 2012 and 51,250,995 shares at march 31, 2012
                                                          4,982,000                                           
        current maturities on long-term debt
                                                           60,000,000         25,000,000                                 
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 49,820,140 shares at june 30, 2012 and 51,250,995 shares at march 31, 2012
                                                           4,982,000                                          
        total liabilities and stockholders' equity
                                                           4,042,264,000            3,180,594,000 3,073,804,000                             
        trade and other receivables, less allowance for doubtful accounts of 49,921 in 2012 and 50,677 in 2011
                                                            309,468,000                                         
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 51,250,995 shares at march 31, 2012 and 51,876,038 shares at march 31, 2011
                                                            5,125,000                                         
        commitments and contingencies note
                                                                                                     
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 51,162,747 shares at december 31, 2011 and 51,876,038 shares at march 31, 2011
                                                             5,116,000                                        
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 51,898,578 shares at september 30, 2011 and 51,876,038 shares at march 31, 2011
                                                              5,190,000                                       
        common stock of 0.10 par value, 125,000,000 shares
                                                                                                     
        authorized, issued 51,879,153 shares at june 30, 2011 and 51,876,038 shares at march 31, 2011
                                                               5,188,000                                      
        trade and other receivables, less allowance for doubtful accounts of 50,677 in 2011 and 38,632 in 2010
                                                                272,467,000                                     
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 51,876,038 shares at march 31, 2011 and 51,830,048 shares at march 31, 2010
                                                                5,188,000                                     
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 51,440,973 shares at december 31, 2010 and 51,830,048 shares at march 31, 2010
                                                                 5,144,000                                    
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 51,421,176 shares at september 30, 2010 and 51,830,048 shares at march 31, 2010
                                                                  5,140,000                                   
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 51,376,026 shares at june 30, 2010 and 51,830,048 shares at march 31, 2010
                                                                   5,138,000                                  
        trade and other receivables, less allowance for doubtful accounts of 38,632 in 2010 and 5,773 in 2009
                                                                    311,617,000                                 
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 51,830,048 shares at march 31, 2010 and 51,696,245 shares at march 31, 2009
                                                                    5,183,000                                 
        deferred compensation – restricted stock
                                                                    -14,970,000 -10,144,000                                
        current maturities of long-term debt
                                                                     25,000,000 25,000,000                               
        commitment and contingencies
                                                                                                     
        common stock of .10 par value, 125,000,000 shares authorized, issued 51,706,924 shares at december and 51,696,245 shares at march
                                                                     5,170,000                                
        common stock of .10 par value, 125,000,000 shares authorized, issued 51,707,721 shares at september and 51,696,245 shares at march
                                                                      5,170,000                               
        other stockholders’ equity
                                                                      2,363,524,000 2,274,894,000  2,138,674,000 2,037,166,000 1,952,405,000 1,924,852,000 1,861,726,000 1,904,232,000 1,876,441,000 1,880,262,000 1,786,680,000 1,690,832,000 1,631,963,000 1,653,090,000 1,585,998,000 1,529,646,000 1,458,125,000  1,390,239,000 1,375,597,000 1,364,934,000  1,371,402,000 1,360,890,000 1,356,300,000  1,332,772,000 1,316,622,000 1,298,142,000  
        common stock of .10 par value, 125,000,000 shares authorized, issued 51,702,721 shares at june and 51,696,245 shares at march
                                                                       5,170,000                              
        trade and other receivables, less allowance for doubtful accounts of 5,773 in 2009 and 5,319 in 2008
                                                                        328,566,000                             
        current maturities on capitalized lease obligations
                                                                           9,776,000 10,059,000 36,217,000 53,255,000 28,068,000 2,194,000                     
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 51,696,245 shares at march 31, 2009 and 52,318,806 shares at march 31, 2008
                                                                        5,169,000                             
        other stockholders' equity
                                                                        2,239,509,000                             
        common stock of .10 par value, 125,000,000 shares authorized, issued 51,538,414 shares at december and 52,318,806 shares at march
                                                                         5,154,000                            
        common stock of .10 par value, 125,000,000 shares authorized, issued 51,539,804 shares at september and 52,318,806 shares at march
                                                                          5,154,000                           
        common stock of .10 par value, 125,000,000 shares authorized, issued 51,532,953 shares at june and 52,318,806 shares at march
                                                                           5,153,000                          
        trade and other receivables, less allowance for doubtful accounts of 5,319 in 2008 and 5,890 in 2007
                                                                            308,813,000                         
        capitalized lease obligations
                                                                               9,776,000 19,712,000                     
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 52,318,806 shares at march 31, 2008 and 57,476,898 shares at march 31, 2007
                                                                            5,232,000                         
        common stock of .10 par value, 125,000,000 shares authorized, issued 52,585,099 shares at december and 57,476,898 shares at march
                                                                             5,259,000                        
        common stock of .10 par value, 125,000,000 shares authorized, issued 54,867,584 shares at september and 57,476,898 shares at march
                                                                              5,487,000                       
        common stock of .10 par value, 125,000,000 shares authorized, issued 55,758,542 shares at june and 57,476,898 shares at march
                                                                               5,576,000                      
        trade and other receivables, less allowance for doubtful accounts of 5,890 in 2007 and 6,265 in 2006
                                                                                286,808,000                     
        accounts payable and accrued expenses
                                                                                121,097,000 109,729,000 104,626,000 94,470,000 97,265,000 81,129,000 83,047,000 74,935,000 82,261,000 75,216,000 71,147,000 74,903,000 59,788,000 57,324,000 58,243,000 57,181,000 60,968,000 53,203,000 54,576,000 54,211,000 61,809,000 
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 57,476,898 shares at march 31, 2007 and 60,310,164 shares at march 31, 2006
                                                                                5,748,000                     
        common stock of .10 par value, 125,000,000 shares authorized, issued 57,468,128 shares at december and 60,310,164 shares at march
                                                                                 5,747,000                    
        common stock of .10 par value, 125,000,000 shares authorized, issued 57,471,395 shares at september and 60,310,164 shares at march
                                                                                  5,747,000                   
        common stock of .10 par value, 125,000,000 shares authorized, issued 58,348,424 shares at june and 60,310,164 shares at march
                                                                                   5,835,000                  
        trade and other receivables, less allowance for doubtful accounts of 6,265 in 2006 and 7,138 in 2005
                                                                                    237,428,000                 
        common stock of 0.10 par value, 125,000,000 shares authorized, issued 60,310,164 shares at march 31, 2006 and 60,718,231 shares at march 31, 2005
                                                                                    6,031,000                 
        income taxes
                                                                                     10,024,000  1,442,000 695,000 9,142,000 2,208,000 1,647,000 3,139,000 4,395,000 4,846,000 9,129,000 1,650,000 4,227,000 3,506,000 3,830,000 2,144,000 
        common stock of .10 par value, 125,000,000 shares authorized, issued 60,488,807 shares at december and 60,718,231 shares at march
                                                                                     6,049,000                
        income taxes payable
                                                                                      2,090,000               
        common stock of .10 par value, 125,000,000 shares authorized, issued 60,489,194 shares at september and 60,718,231 shares at march
                                                                                      6,049,000               
        common stock of .10 par value, 125,000,000 shares authorized, issued 60,716,631 shares at june and 60,718,231 shares at march
                                                                                       6,072,000              
        trade and other receivables, less allowance for doubtful accounts of 7,138 in 2005 and 7,304 in 2004
                                                                                        169,784,000             
        stockholders’ equity
                                                                                        1,442,702,000    1,366,110,000    1,351,395,000    1,285,818,000 
        common stock of .10 par value, 125,000,000 shares authorized, issued 60,633,245 shares at december and 60,699,438 shares at march
                                                                                         6,063,000            
        common stock of .10 par value, 125,000,000 shares authorized, issued 60,633,245 shares at september and 60,699,438 shares at march
                                                                                          6,063,000           
        less accumulated depreciation
                                                                                           906,133,000 894,863,000 1,000,623,000 981,955,000 964,281,000 952,516,000 940,220,000 923,813,000 911,962,000 898,631,000 
        common stock of .10 par value, 125,000,000 shares authorized, issued 60,633,245 shares at june and 60,699,438 shares at march
                                                                                           6,063,000          
        trade and other receivables, less allowance for doubtful accounts of 7,304 in 2004 and 7,304 in 2003
                                                                                            165,762,000         
        common stock of .10 par value, 125,000,000 shares authorized, issued 60,576,386 shares at december and 60,578,927 shares at march
                                                                                             6,058,000        
        common stock of .10 par value, 125,000,000 shares authorized, issued 60,574,847 shares at september and 60,578,927 shares at march
                                                                                              6,057,000       
        common stock of .10 par value, 125,000,000 shares authorized, issued 60,576,697 shares at june and 60,578,927 shares at march
                                                                                               6,058,000      
        trade and other receivables, less allowance for doubtful accounts of 7,304 in 2003 and 7,944 in 2002
                                                                                                160,773,000     
        common stock of .10 par value, 125,000,000 shares authorized, issued 60,580,361 shares at december and 60,580,671 shares at march
                                                                                                 6,058,000    
        common stock of .10 par value, 125,000,000 shares authorized, issued 60,580,361 shares at september and 60,580,671 shares at march
                                                                                                  6,058,000   
        common stock of .10 par value, 125,000,000 shares authorized, issued 60,580,361 shares at june and 60,580,671 shares at march
                                                                                                   6,058,000  
        trade and other receivables, less allowance for doubtful accounts of 7,944 in 2002 and 7,981 in 2001
                                                                                                    182,592,000 
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2026-03-31 2025-12-31 2025-06-30 2025-03-31 2024-12-31 2024-06-30 2024-03-31 2023-12-31 2023-06-30 2023-03-31 2022-12-31 2022-06-30 2022-03-31 2021-12-31 2021-06-30 2021-03-31 2020-12-31 2020-06-30 2020-03-31 2019-09-30 2019-06-30 2019-03-31 2018-08-01 2018-06-30 2018-03-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 2004-09-30 2004-06-30 2004-03-31 2003-12-31 2003-09-30 2003-06-30 2003-03-31 2002-12-31 2002-09-30 2002-06-30 
                                                                                               
          cash flows from operating activities:
                                                                                               
          net income
        5,976,000 219,449,000 115,022,000 42,320,000 36,619,000 96,662,000 46,745,000 37,328,000 32,744,000 10,816,000                                                                              
          adjustments to reconcile net income to net cash from operating activities:
                                                                                               
          depreciation
        38,497,000 37,838,000 75,923,000 39,014,000 38,736,000 78,191,000 38,811,000 42,788,000          34,271,000 17,285,000                                                                     
          amortization of deferred drydocking and survey costs
        28,122,000 28,351,000 53,823,000 26,418,000 25,884,000 37,524,000 17,459,000 16,379,000 21,290,000 9,618,000 8,898,000 18,136,000 8,984,000 9,670,000 21,582,000 11,257,000 11,265,000 20,980,000 9,822,000 6,688,000 5,490,000 3,898,000 2,013,000 1,592,000 638,000 4,000                                                              
          amortization of debt premium and discounts
        848,000  2,956,000 1,501,000  3,593,000 1,814,000  842,000 420,000  765,000 375,000  1,986,000 1,108,000  1,357,000 675,000 -543,000 -514,000 -505,000 -471,000 -457,000 -443,000                                                               
          amortization of below market contracts
         -219,000 -698,000 -351,000 -1,071,000 -2,856,000 -1,206,000 -1,894,000                                                                                
          unrealized foreign exchange loss
        2,561,000 -2,322,000                                                                                      
          deferred income taxes provision
        10,389,000 -184,247,000 -15,420,000                                                                                     
          loss on asset dispositions
        112,000       -4,218,000 -3,620,000  -1,076,000 1,090,000 -207,000 -53,000 2,880,000 1,948,000                   7,607,000                                                     
          stock-based compensation expense
        3,063,000 3,454,000 7,548,000 3,491,000 3,886,000 6,226,000 2,766,000 3,508,000 4,751,000 2,103,000 2,028,000 3,421,000 1,458,000 1,439,000 2,676,000 1,172,000                                                                        
          changes in assets and liabilities:
                                                                                               
          trade and other receivables
        -14,363,000 47,224,000 7,314,000 10,901,000 -30,720,000 -12,146,000 -17,616,000 -17,072,000 -37,919,000 -25,733,000 26,172,000 -35,085,000 -15,570,000 -488,000 22,394,000 12,758,000 -12,040,000 -4,991,000 -9,438,000 -875,000 -8,717,000 -2,204,000 4,353,000 -13,435,000 -1,662,000 -3,775,000 6,650,000 51,051,000 35,515,000 -8,151,000 26,414,000 32,814,000 7,835,000 -9,389,000 40,280,000 5,339,000 -24,618,000 14,786,000 -39,044,000 237,034,000 -57,976,000 -102,957,000 -62,616,000 -33,038,000 -28,705,000 -11,009,000 -9,698,000 -23,401,000 394,000   -5,883,000 18,936,000   -15,634,000 36,505,000      -18,653,000 11,772,000 -24,599,000 -16,917,000 7,732,000 -17,348,000                    
          accounts payable
        -8,109,000 23,768,000 -22,670,000 -21,182,000 7,327,000 15,809,000 6,843,000 -12,252,000 30,876,000 25,829,000 7,117,000 8,072,000 2,825,000 2,746,000 -792,000 -2,359,000 4,028,000 -10,390,000 3,210,000 -498,000 -5,569,000 -2,200,000 10,000 -5,575,000 7,284,000 -317,000 3,488,000 -18,872,000 -8,330,000 5,058,000 4,613,000 -11,743,000 1,634,000 1,001,000 4,227,000 6,063,000 -13,400,000 -10,292,000 -5,360,000 -12,715,000 -141,000 9,464,000 1,997,000 -38,867,000 -3,252,000 -2,072,000 18,267,000 17,578,000 6,017,000 -4,459,000 2,708,000 3,239,000 -257,000   -801,000 -11,963,000 -1,163,000 1,270,000 22,359,000   -1,918,000 13,422,000 8,712,000 -7,576,000 2,772,000                     
          accrued expenses
        -13,644,000 23,080,000 -223,000 3,106,000 12,016,000 10,648,000 6,600,000 5,841,000 -13,544,000 1,830,000 -427,000 2,354,000 3,207,000 -215,000 -2,074,000 -4,270,000       -4,067,000 -7,497,000 845,000 -10,555,000 8,603,000 9,267,000 -11,568,000 3,607,000 -19,993,000 -2,075,000 -37,556,000 15,260,000 -28,772,000 -4,579,000 6,502,000 12,232,000 -25,590,000 7,248,000 18,579,000 -2,484,000 11,115,000 7,534,000 3,359,000 3,540,000 2,636,000 -1,672,000 -2,469,000   -6,114,000 -17,607,000 9,253,000 7,388,000 -25,287,000 24,958,000 -11,379,000 17,827,000 -6,680,000 9,862,000 -1,410,000 1,751,000 -7,231,000 8,071,000 2,789,000 4,988,000                     
          deferred drydocking and survey costs
        -36,381,000 -13,853,000 -67,077,000 -43,339,000 -17,674,000 -80,101,000 -40,018,000 -24,069,000 -52,691,000 -31,325,000 -12,117,000 -31,063,000 -12,612,000 -9,894,000 -6,771,000 -2,722,000                                                                        
          other
        2,108,000 -23,003,000 22,926,000 24,285,000 10,052,000 -7,133,000 3,533,000 -8,466,000 -565,000 369,000 14,151,000 -16,419,000 -3,843,000 10,998,000 -7,234,000 1,054,000 4,827,000 -3,354,000 -8,348,000 11,654,000 3,563,000 -5,949,000 -3,176,000 2,788,000 2,058,000 -1,339,000 2,724,000 6,386,000 -1,566,000 2,636,000 -4,084,000 2,567,000 -5,347,000 1,874,000 2,774,000 -10,017,000 -6,090,000 -3,183,000 267,000 3,309,000 -233,000 -5,087,000 3,409,000 -231,000 7,734,000 2,000,000 846,000 706,000 940,000 888,000 756,000 1,178,000 -1,715,000 500,000 659,000 1,774,000 698,000 -2,415,000 1,771,000 4,309,000 2,716,000 -692,000 2,724,000 2,063,000 -1,237,000 2,167,000 2,437,000 -3,550,000 8,006,000 -41,000 259,000 12,935,000 -364,000 370,000 -364,000   -13,000 -336,000 -7,549,000 26,000       
          net cash from operating activities
        19,179,000 152,960,000 171,406,000 85,973,000 91,303,000 133,410,000 54,765,000 47,231,000 22,535,000 12,794,000 45,340,000 -33,227,000 -11,624,000 6,938,000 10,567,000 5,716,000 2,180,000 -12,823,000 -27,525,000 -15,981,000 -17,566,000 -3,157,000 5,247,000 22,967,000 -5,984,000 -17,809,000 -23,363,000 70,150,000 -39,727,000 10,301,000 -10,903,000 61,967,000 27,502,000 71,194,000 92,697,000 83,154,000 90,270,000 154,344,000 30,945,000 34,788,000 60,001,000 6,233,000 3,595,000 31,212,000 36,452,000 77,179,000 69,080,000 64,721,000 70,518,000 60,664,000 26,518,000 46,156,000 64,691,000 100,605,000 52,754,000 28,911,000 134,517,000 94,483,000 70,350,000 157,929,000 171,603,000 104,186,000 92,717,000 136,415,000 132,605,000 99,313,000 121,158,000 99,078,000 117,708,000 119,972,000 98,337,000 99,934,000 117,847,000 31,489,000 34,308,000 109,111,000 18,307,000 5,644,000 27,000,000 95,546,000 -5,532,000 11,759,000 27,276,000 154,288,000 -1,304,000 -14,464,000 63,480,000 
          capital expenditures
          free cash flows
        19,179,000 152,960,000 171,406,000 85,973,000 91,303,000 133,410,000 54,765,000 47,231,000 22,535,000 12,794,000 45,340,000 -33,227,000 -11,624,000 6,938,000 10,567,000 5,716,000 2,180,000 -12,823,000 -27,525,000 -15,981,000 -17,566,000 -3,157,000 5,247,000 22,967,000 -5,984,000 -17,809,000 -23,363,000 70,150,000 -39,727,000 10,301,000 -10,903,000 61,967,000 27,502,000 71,194,000 92,697,000 83,154,000 90,270,000 154,344,000 30,945,000 34,788,000 60,001,000 6,233,000 3,595,000 31,212,000 36,452,000 77,179,000 69,080,000 64,721,000 70,518,000 60,664,000 26,518,000 46,156,000 64,691,000 100,605,000 52,754,000 28,911,000 134,517,000 94,483,000 70,350,000 157,929,000 171,603,000 104,186,000 92,717,000 136,415,000 132,605,000 99,313,000 121,158,000 99,078,000 117,708,000 119,972,000 98,337,000 99,934,000 117,847,000 31,489,000 34,308,000 109,111,000 18,307,000 5,644,000 27,000,000 95,546,000 -5,532,000 11,759,000 27,276,000 154,288,000 -1,304,000 -14,464,000 63,480,000 
          cash flows from investing activities:
                                                                                               
          proceeds from asset dispositions
        3,329,000 5,331,000 11,084,000 3,816,000 4,470,000 14,817,000 12,463,000 5,902,000 8,659,000 5,716,000  8,163,000 4,628,000  29,560,000                                                                         
          proceeds from sale of notes
         660,000 600,000 5,846,000 702,000                                                                                  
          additions to properties and equipment
        -14,885,000 -5,147,000 -15,492,000 -10,266,000 -4,534,000 -17,334,000 -10,942,000 -8,386,000 -17,500,000 -8,651,000 -4,929,000 -5,380,000 -1,229,000 -6,368,000 -1,861,000 -1,196,000 -10,218,000 -4,075,000 -2,449,000 -5,058,000 -5,757,000 -3,116,000 -3,341,000 -4,098,000 -1,677,000 -589,000 -1,627,000 -8,355,000 -7,635,000 -1,931,000 -7,578,000 -42,260,000 -13,235,000 -46,392,000 -92,598,000 -132,509,000 -103,274,000 -88,537,000 -39,874,000 -197,237,000 -177,149,000 -63,875,000 -156,434,000 -113,924,000 -136,822,000 -112,394,000 -77,432,000 -60,101,000 -141,951,000   -106,649,000 -117,177,000 -402,437,000 10,974,000 -147,960,000 -91,481,000      -129,657,000 -62,313,000 -75,256,000 -104,910,000 -111,543,000 -61,832,000 -45,115,000 -88,127,000 -40,108,000 -46,799,000 -89,678,000 7,943,000 -43,874,000 -167,857,000 4,626,000 26,129,000 -70,289,000 -240,658,000 5,435,000 74,290,000 -136,582,000 -214,625,000 10,021,000 34,007,000 -99,023,000 
          net cash from investing activities
        -11,556,000 184,000 -3,748,000 -5,850,000 5,782,000 -1,815,000 1,521,000 -2,484,000 -8,841,000 -2,935,000 164,000 -26,742,000 2,360,000 -6,314,000 27,699,000 9,787,000 -3,420,000 16,831,000 7,003,000 -532,000 5,158,000 6,535,000 190,000 -622,000 7,815,000 4,286,000 4,253,000 -5,891,000 16,909,000 -1,326,000 5,171,000 -27,179,000 -11,150,000 -33,435,000 -63,232,000 -115,714,000 -24,030,000 -68,957,000 -22,717,000 -129,469,000 1,321,000 7,138,000 -282,675,000 -104,671,000 -127,629,000 -108,751,000 -72,436,000 -48,240,000 -136,399,000   -99,185,000 -105,813,000   -130,287,000 -80,634,000 -93,279,000 5,718,000    -117,252,000 -41,493,000 -72,769,000   -55,668,000 -32,498,000   -20,808,000 -78,328,000 193,008,000 -40,664,000 -154,191,000 8,010,000 18,799,000 -61,743,000 -228,954,000 2,476,000 73,089,000 -132,040,000 -203,598,000 8,482,000 37,067,000 -97,882,000 
          cash flows from financing activities:
                                                                                               
          principal payments on long-term debt
        -1,097,000 -1,814,000 -26,541,000 -12,500,000 -14,023,000 -26,507,000 -12,500,000       -159,659,000 -37,901,000 -26,414,000 -64,560,000 -4,742,000 -2,600,000 -2,666,000 -2,283,000 -1,509,000             -23,662,000                                                     
          purchase of common stock
         -90,089,000 -39,275,000 -44,103,000 -32,898,000 -3,501,000                                                                                 
          payments on finance leases
        -24,903,000 -895,000                                                                                      
          debt issuance costs
        -101,000 -844,000   -20,000 -193,000 -135,000                           -936,000     -943,000 -559,000 -1,146,000 -2,699,000     -50,000 -11,000   -2,586,000 -1,262,000   -5,000                               
          share based awards reacquired to pay taxes
        -6,189,000 -27,000 -7,752,000 -7,465,000  -28,463,000 -28,462,000                                                                                 
          net cash from financing activities
        -32,290,000 -3,592,000 -124,382,000 -59,240,000 -58,230,000 -88,059,000 -44,598,000 -48,843,000 -6,948,000 -5,174,000 -47,000 -2,547,000 -1,280,000 -48,000 -39,573,000 -27,333,000 -65,543,000 -5,354,000 -3,131,000 -4,018,000 -2,464,000 -3,087,000 -1,382,000 -3,165,000 -9,847,000 -87,365,000 -3,516,000 -7,659,000 -2,301,000 -2,712,000 -4,046,000 595,670,000 -56,588,000 -52,527,000 -5,049,000 33,740,000 -113,167,000 -14,523,000 -15,136,000 40,894,000 7,290,000 -32,650,000 303,324,000 59,841,000 8,635,000 -72,273,000 -76,780,000 115,882,000 -47,958,000   -9,292,000 297,510,000   -12,127,000 -12,965,000      -61,000,000  -152,217,000   9,583,000 -1,400,000 -47,609,000 -96,816,000 -81,000 1,599,000 -113,694,000 6,123,000 38,597,000 -19,880,000 -23,054,000 31,140,000 154,711,000 -45,063,000 -51,064,000 97,665,000 58,117,000 -3,636,000 -34,494,000 39,829,000 
          effects of exchange rate changes on cash, cash equivalents and restricted cash
        -1,813,000 910,000                                                                                      
          net change in cash, cash equivalents and restricted cash
        -26,480,000 150,462,000 43,276,000 20,883,000 38,855,000 43,536,000 11,688,000 -4,096,000 6,746,000 4,685,000 45,457,000 -62,516,000 -10,544,000 576,000 -1,307,000 -11,830,000 -66,783,000 -1,346,000 -23,653,000 -20,531,000 -14,872,000 291,000 4,055,000 19,180,000 -8,016,000                                                               
          cash, cash equivalents and restricted cash at beginning of period
        581,568,000 329,031,000 329,031,000 277,965,000 277,965,000 167,977,000 167,977,000 154,276,000 154,276,000 155,225,000 155,225,000 227,608,000 227,608,000 397,744,000 453,335,000                                                               
          cash, cash equivalents and restricted cash at end of period
        555,088,000 150,462,000 372,307,000 349,914,000 38,855,000 321,501,000 289,653,000 -4,096,000 174,723,000 172,662,000 45,457,000 91,760,000 143,732,000 576,000 153,918,000 143,395,000 -66,783,000 226,262,000 203,955,000 -20,531,000 -14,872,000 398,035,000 4,055,000 19,180,000 445,319,000                                                               
          operating activities:
                                                                                               
          amortization of debt premiums and discounts
                                 -281,000                                                              
          gain on asset dispositions
         -5,084,000 -8,018,000 -2,538,000 -2,672,000 -13,039,000 -11,039,000   -2,216,000       -80,000 -6,991,000 -5,331,000 -271,000 494,000 -1,270,000 1,571,000 -1,338,000 -1,919,000 -4,000 -3,189,000  -6,139,000 -6,253,000 -5,643,000 -6,692,000 -5,883,000   -4,275,000 1,537,000 -3,590,000 -2,943,000 -2,363,000 -7,170,000 -49,000 -2,140,000 -3,839,000 -99,000 -1,833,000 -838,000 -3,986,000 -2,496,000   -1,607,000 -2,425,000   -5,115,000 -5,151,000                               
          gain on pension settlement
               -506,000 -1,807,000                                                                               
          loss on early extinguishment of debt
         12,000                                                                                      
          changes in operating assets and liabilities, net:
                                                                                               
          marine operating supplies
                              -700,000 -34,000 -677,000 1,005,000 -514,000 -408,000 404,000 1,001,000 1,288,000 3,886,000 -1,584,000 6,120,000 5,250,000 4,905,000 7,382,000 -317,000 -5,822,000 -1,681,000 -1,967,000 8,263,000 1,100,000 -1,097,000 -5,120,000 -319,000 -1,962,000 -1,362,000 1,029,000   -1,579,000 -647,000   1,868,000 -2,774,000 4,296,000 1,100,000    -1,385,000 -2,164,000 -3,850,000 1,503,000 3,044,000 -1,328,000                    
          prepaid expenses and other current assets
                                                                                               
          other current liabilities
                              212,000 8,285,000 -2,695,000 3,753,000 2,644,000 -3,860,000 -13,082,000 -2,902,000 -6,814,000 1,661,000 -11,228,000 800,000 -6,811,000 555,000 -887,000 1,066,000 -616,000 6,087,000 4,010,000 -668,000 944,000 950,000 2,762,000 915,000 219,000 -280,000 1,708,000 1,697,000 5,575,000 -4,282,000 -46,000 2,021,000 14,982,000 -29,644,000 -939,000 764,000 7,930,000 -8,737,000 -7,673,000 -900,000 20,043,000 -1,875,000 7,798,000 791,000 11,110,000                     
          other liabilities
                              -243,000 69,000 -58,000                                                               
          acquisitions, net of cash acquired
                 -29,525,000                                                                            
          exercise of warrants
                                                                                              
          issuance of long-term debt
                                                                                             
          debt extinguishment premium
         -12,000            -7,722,000 -59,000 -59,000                                                                        
          acquisition of non-controlling interest in a majority owned subsidiary
               -1,427,000 -1,427,000                                                                              
          proceeds from issuance of shares
             2,000                                                                                  
          provision for deferred income taxes
           2,347,000  32,000 73,000 23,000 34,000 35,000 -98,000 145,000 177,000 -1,454,000 648,000 30,000 1,117,000 206,000  753,000 -163,000 169,000     -5,543,000      64,000 64,000 64,000   -1,145,000 2,432,000    -12,151,000 -3,051,000 -4,310,000 -1,718,000 -2,654,000 281,000 -3,216,000   5,265,000 -1,454,000   15,741,000 -957,000   5,013,000   -9,874,000 3,662,000 16,417,000 886,000 -14,285,000 701,000                    
          changes in assets and liabilities, net of effects of business acquisition:
                                                                                               
          gain on bargain purchase
                  -1,300,000 -1,300,000                                                                           
          long-lived asset impairments and other
                                                                                               
          loss on warrants
                  14,175,000                                                                            
          due to/from affiliate
                                                                                               
          repurchase of spo acquisition warrants
                  -117,202,000                                                                             
          tax on share-based award
                                                                                               
          affiliate credit loss impairment expense
                     1,400,000 -1,000,000  -600,000 53,581,000                                                                      
          loss on debt extinguishment
                     11,041,000 59,000 59,000                                                                        
          long-lived asset impairment and other
                                                                                               
          changes in due to/from affiliates
                   -20,000 -20,000  4,693,000                                                                         
          tax on share-based awards
                -5,521,000 -3,747,000  -2,176,000 -1,017,000  -758,000 -135,000                                                                        
          depreciation and amortization
                42,144,000 21,048,000 20,983,000 40,287,000 17,673,000 18,618,000 36,694,000 18,470,000    19,047,000 19,548,000 19,034,000 11,377,000 11,192,000 11,380,000 8,138,000 36,287,000 37,592,000 41,302,000 43,845,000 44,552,000 45,251,000 45,422,000 45,979,000 45,657,000 45,054,000 43,331,000 43,708,000 43,111,000 42,925,000 42,391,000 42,056,000 40,108,000 38,287,000 37,181,000 36,047,000 35,784,000 35,585,000 35,215,000 33,807,000 33,749,000 34,723,000 35,058,000 35,832,000 34,963,000 33,541,000 32,734,000 32,260,000 31,649,000 32,780,000 32,173,000 30,657,000 30,621,000 31,681,000 31,123,000 29,836,000 28,197,000 29,912,000 57,709,000 766,000 27,797,000 80,634,000 278,000 277,000 26,337,000 74,315,000 585,000           
          long-lived asset impairment credit
                   -500,000 -500,000                                                                           
          debt issuance and modification costs
                  -371,000 -263,000                                                                           
          net loss
                  10,182,000 -37,285,000 -12,271,000 -38,079,000 -65,174,000 -35,527,000 -29,427,000 -129,188,000 -18,524,000 -43,806,000 -15,553,000 -21,286,000  -11,182,000 -39,029,000 -15,527,000 -524,410,000  -296,773,000 -177,623,000 -88,643,000                                                         
          adjustments to reconcile net loss to net cash from operating activities:
                                                                                               
          affiliate guarantee obligation
                        2,000,000                                                                      
          proceeds from sales of assets
                       10,983,000 6,798,000 20,906,000 9,452,000 4,526,000 10,915,000 9,651,000 3,531,000 3,476,000 9,492,000 4,875,000 608,000 2,464,000 10,494,000 605,000 1,234,000 2,262,000 2,166,000 396,000 5,866,000 3,150,000 1,161,000 245,000 3,754,000 5,324,000 38,360,000 5,485,000 2,161,000 8,658,000 8,643,000 4,121,000 5,856,000 11,861,000 5,552,000 17,939,000 6,677,000 7,464,000 11,364,000 6,439,000 11,929,000 17,672,000 10,847,000 8,601,000 14,615,000 8,901,000 9,821,000 8,545,000 12,093,000 20,820,000 2,487,000 34,213,000 24,501,000 6,691,000 12,200,000 48,510,000 7,021,000 25,991,000 11,350,000 185,065,000 3,210,000 13,696,000 3,384,000 -7,330,000 8,546,000 11,094,000 -2,984,000 -1,201,000 4,542,000 11,027,000 -1,539,000 3,060,000 1,141,000 
          proceeds from stock offering
                  117,202,000                                                                             
          affiliate credit loss impairment credit
                                                                                               
          supplemental disclosure of cash flow information:
                                                                                               
          cash paid during the period for:
                                                                                               
          interest, net of amounts capitalized
                   7,626,000   7,028,000 3,746,000  10,734,000 5,442,000 8,189,000 7,974,000 8,319,000 8,084,000 7,982,000 8,152,000 59,000 433,000 8,218,000 28,260,000 7,476,000 26,733,000 3,121,000 22,714,000 2,464,000 22,430,000 1,344,000 21,718,000 1,943,000 24,385,000                                                 
          income taxes
                   9,330,000 3,200,000  6,609,000 2,535,000  6,461,000 2,550,000 2,632,000 3,339,000 4,415,000 3,596,000 3,654,000 6,429,000 1,392,000 3,611,000 2,167,000 7,959,000 5,784,000 11,006,000 13,377,000 10,355,000 10,412,000 17,441,000 16,323,000 25,573,000 21,244,000 11,170,000 16,021,000 11,101,000 11,527,000 20,617,000 13,144,000 14,503,000 14,429,000 12,646,000 12,025,000 12,863,000 12,433,000 12,011,000 12,555,000 12,161,000 12,172,000 11,477,000 15,158,000 12,845,000 14,481,000 15,087,000 15,588,000 14,556,000 16,127,000 13,706,000 14,122,000 12,665,000 16,219,000 13,078,000 23,090,000 29,330,000 1,908,000 23,816,000 9,692,000 -15,748,000 26,441,000 10,140,000 24,404,000 1,619,000 1,103,000 6,573,000 19,998,000 -660,000 1,756,000 5,290,000 23,475,000 -752,000 2,303,000 6,957,000 
          supplemental disclosure of noncash investing activities:
                                                                                               
          acquisition of spo
                   162,648,000                                                                            
          supplemental disclosure of noncash financing activities:
                                                                                               
          warrants issued for spo acquisition
                   162,648,000                                                                            
          acquisition of joint venture, net of cash acquired
                    -1,039,000                                                                           
          changes in investments in unconsolidated companies
                                                                                               
          changes in due to/from affiliate
                       2,738,000 2,097,000 3,242,000 -2,405,000 -182,000 -4,095,000 19,175,000   1,083,000 -3,920,000 -1,978,000 24,961,000 -29,924,000 19,845,000 5,947,000 15,907,000 14,408,000 12,467,000 41,302,000 29,707,000 16,326,000 31,003,000 31,552,000                                                 
          other current assets
                              280,000 7,803,000 949,000 5,714,000 -16,210,000 -6,458,000 -4,238,000 2,320,000 -4,147,000 4,265,000 5,392,000 6,897,000 -10,578,000 -296,000 7,142,000 8,482,000 -12,534,000 -1,593,000 4,659,000 923,000 -11,589,000 822,000 3,080,000 4,562,000 -10,127,000 383,000 4,410,000   3,296,000 440,000   5,712,000 766,000      -7,875,000 1,651,000 2,455,000 2,168,000 -5,449,000 -726,000                    
          other liabilities and deferred credits
                                 -847,000 1,251,000 1,884,000 632,000 -1,961,000 -3,212,000 -2,175,000 -188,000 1,886,000 708,000 7,900,000 -1,780,000 -2,062,000 817,000 -10,572,000 -739,000 -1,407,000 876,000 2,906,000 -5,592,000 2,343,000 1,165,000 9,916,000 -4,608,000 1,019,000 1,620,000 638,000 2,029,000 2,937,000 615,000 -998,000 2,472,000                               
          long-lived asset impairments
                         65,689,000 10,207,000                                                                     
          changes in assets and liabilities, net:
                                                                                               
          debt modification costs
                      -855,000 -725,000                                                                        
          impairment of due from affiliate
                                                                                               
          cash and cash equivalents from stock-based merger
                                                                                               
          premium paid for redemption of secured notes
                                                                                               
          cash payments to general unsecured creditors
                                 -87,366,000                                                              
          cash received for issuance of common stock
                                 1,000                                                              
          compensation expense - stock-based
                         2,736,000 1,335,000 7,384,000 3,588,000 5,627,000 3,828,000 3,183,000 2,956,000 1,173,000 326,000  1,538,000 1,092,000 1,536,000  3,346,000 3,395,000 3,219,000  5,320,000 5,734,000 5,341,000  4,131,000 5,288,000 5,711,000  4,741,000 5,961,000 4,359,000   2,039,000 2,905,000  2,242,000 2,167,000 2,252,000  2,392,000 2,468,000 2,468,000  2,258,000 3,207,000 2,945,000                         
          accrued costs and expenses
                         -13,007,000 -1,146,000 -5,597,000 649,000 -5,626,000                                                                  
          cash paid for deferred drydocking and survey costs
                         -28,964,000 -24,867,000 -15,013,000 -16,403,000 -12,285,000 -3,694,000 -4,534,000 -8,860,000                                                               
          taxes on share-based awards
                                                                                               
          taxes on share based awards
                         -612,000 -531,000 -1,352,000 -182,000 -1,578,000                                                                  
          changes in investments in, at equity, and advances to unconsolidated companies
                           54,000 116,000 265,000 206,000 12,168,000 15,713,000                                                               
          asset impairments
                              16,853,000 1,215,000 6,186,000  163,423,000 64,857,000 253,422,000 129,562,000 36,886,000 55,540,000 15,141,000                                                       
          payments to general unsecured creditors
                              -8,377,000                                                               
          reorganization items
                                  308,011,000                                                             
          excess tax liability on stock option activity
                                                                                               
          changes in due to/from related parties
                              8,421,000                                                                 
          accrued property and liability losses
                              -343,000 -62,000 267,000 13,000 -825,000 9,000 -28,000 -8,000 289,000 -122,000 -14,000 -3,000 -209,000 404,000 27,000 -26,000 -367,000 -141,000 -327,000 -119,000 158,000 777,000 -39,000 -131,000 -110,000 -151,000 -38,000 -84,000 63,000 -63,000 -13,000   -842,000 -116,000 -221,000 467,000    -105,000 381,000 -126,000 -73,000 -33,000 -849,000                    
          proceeds related to novated vessel construction contract
                                                                                               
          principal payment on long-term debt
                              -1,383,000 -1,166,000 -1,471,000  -2,316,000  -2,301,000 -2,712,000 -2,324,000  -44,789,000    -1,210,000 -22,037,000 -3,959,000  -411,439,000 -594,125,000 -97,490,000                                             
          benefit from deferred income taxes
                                                                                               
          supplemental disclosure of non-cash investing activities:
                                                                                               
          equity in earnings of unconsolidated companies, less dividends
                                 -1,044,000 -4,101,000  -892,000    15,663,000 3,281,000 3,143,000  5,325,000 -2,877,000 -3,998,000  -5,905,000 -2,769,000 -3,398,000    -1,614,000                                         
          payments related to novated vessel construction contract
                                  5,272,000                                                             
          refunds from cancelled vessel construction contracts
                                   14,050,000 11,515,000 9,929,000 12,000,000 24,190,000                                                     
          net change in cash and cash equivalents
                                 -100,888,000 -22,626,000 56,600,000 -25,119,000 6,263,000 -9,778,000 630,458,000 -40,236,000 -14,768,000 24,416,000 1,180,000 -46,927,000 70,864,000 -6,908,000 -53,787,000 68,612,000 -19,279,000 24,244,000 -13,618,000 -82,542,000 -103,845,000 -80,136,000 132,363,000 -113,839,000   -62,321,000 256,388,000   -113,503,000 40,918,000 -19,251,000 64,113,000    -85,535,000 41,603,000 -92,381,000 -33,610,000 -39,213,000 52,993,000 83,810,000 32,705,000 -21,811,000 79,045,000 41,118,000 110,803,000 -233,000 -6,483,000 6,437,000 1,389,000 -3,603,000 21,303,000 -48,119,000 33,784,000 -7,099,000 8,807,000 3,542,000 -11,891,000 5,427,000 
          cash and cash equivalents at beginning of period
                                 560,866,000 706,404,000  678,438,000  78,568,000  60,359,000  40,569,000  320,710,000  245,720,000  223,070,000  250,793,000  270,205,000  393,806,000  246,109,000  233,000 -233,000 15,376,000  -2,214,000 -3,603,000 17,636,000  26,685,000 -7,099,000 17,767,000  -6,464,000 5,427,000 11,882,000 
          cash and cash equivalents at end of period
                                 459,978,000 683,778,000  -25,119,000 6,263,000 668,660,000  -40,236,000 -14,768,000 102,984,000  -46,927,000 70,864,000 53,451,000  68,612,000 -19,279,000 64,813,000  -82,542,000 -103,845,000 240,574,000  -113,839,000 105,763,000 196,423,000  256,388,000 -71,224,000 122,877,000  40,918,000 -19,251,000 314,906,000  57,346,000 -40,118,000 184,670,000  -92,381,000 -33,610,000 354,593,000  83,810,000 32,705,000 224,298,000  41,351,000 110,570,000 15,143,000  4,223,000 -2,214,000 14,033,000  -21,434,000 26,685,000 10,668,000  -2,922,000 -6,464,000 17,309,000 
          benefit for deferred income taxes
                                           4,889,000    -16,409,000 -8,085,000                                               
          (gain) loss on asset dispositions
                                                                                               
          goodwill impairment
                                                                                           
          equity in earnings (losses) of unconsolidated companies, net of dividends
                                                                                               
          compensation expense – stock based
                                                                                               
          excess tax (benefit) liability on stock options exercised
                                                                                               
          proceeds from sale/leaseback of assets
                                           13,256,000 77,943,000 19,351,000 13,400,000 63,140,000 141,885,000                                               
          debt borrowings
                                       625,000,000 31,338,000 118,488,000   49,100,000 430,000,000 572,000,000 414,262,000 70,000,000    125,000,000   425,000,000                 5,000,000                 
          cash dividends
                                       -10,000 -11,799,000 -11,790,000 -11,789,000 -11,837,000 -11,959,000 -12,518,000 -12,520,000 -12,461,000 -12,465,000 -12,454,000 -12,436,000 -12,162,000 -12,368,000 -12,492,000 -12,566,000 -12,569,000 -12,803,000   -12,859,000 -12,846,000   -12,948,000 -12,927,000      -12,867,000 -7,712,000 -8,169,000 -8,316,000 -8,490,000 -8,360,000 -8,344,000 -8,457,000 -8,728,000 -8,668,000 -17,259,000 -19,000 -8,629,000 -25,710,000 -17,000 -3,000 -8,556,000 -25,504,000 -3,000 -3,000 -8,498,000 -25,403,000 -4,000 -23,000 -8,450,000 
          repurchases of common stock
                                                                                              
          cash and cash equivalents at beginning of year
                                                                                               
          cash and cash equivalents at end of year
                                                                                               
          cash paid during the year for:
                                                                                               
          equity in losses of unconsolidated companies, less dividends
                                      108,000                                                         
          net earnings
                                         -43,999,000 -15,164,000 -8,892,000 -160,981,000 60,825,000 43,699,000 43,417,000 12,583,000 54,172,000 30,083,000 46,591,000 29,947,000 41,356,000 32,856,000 33,642,000 34,087,000 -4,876,000 24,558,000 12,019,000 34,363,000 19,403,000 39,831,000 56,913,000 59,896,000 98,185,000 44,482,000 109,726,000 116,965,000 95,431,000 84,776,000 85,385,000 89,370,000 86,466,000 87,542,000 87,597,000 164,858,000 32,742,000 71,449,000 175,734,000 -22,170,000 53,332,000 28,860,000 81,586,000 3,444,000           
          adjustments to reconcile net earnings to net cash from operating activities:
                                                                                               
          equity in earnings of unconsolidated companies, net of dividends
                                                   9,317,000 -5,256,000   -2,729,000 -4,933,000   -2,580,000 -4,133,000    -4,037,000      1,462,000  780,000 -3,234,000 -3,386,000                     
          payments for acquisition, net of cash acquired
                                               -127,737,000                                             
          proceeds from exercise of stock options
                                           -2,000 31,000 994,000 781,000 1,661,000 2,746,000 1,675,000 1,850,000 1,030,000 173,000 765,000 4,572,000 114,000 637,000 88,000 5,238,000 1,538,000 1,014,000 905,000 910,000    -1,000    161,000 6,816,000 36,603,000                     
          excess tax benefit (liability) on stock options exercised
                                                               -89,000                                
          cash contributions from noncontrolling interests
                                                                                               
          excess tax benefit on stock options exercised
                                                -92,000 -329,000 -12,000    -49,000    17,000    138,000        -1,408,000                         
          increase in receivables due to sale of shipyard
                                                 -3,000,000 9,500,000                                             
          reversal of liabilities for uncertain tax positions
                                                               -1,826,000                               
          due from affiliate
                                                                                               
          due to affiliate
                                                                                               
          stock repurchases
                                                   -20,006,000 -65,028,000             -53,634,000 -18,900,000 -116,404,000 -61,058,000 -113,685,000   -40,384,000 -91,351,000                 
          interest
                                               4,749,000 17,600,000 19,358,000 3,980,000 4,910,000 13,876,000 16,563,000 2,696,000 5,981,000 11,253,000 7,382,000 12,223,000 7,059,000 435,000 7,677,000 786,000 7,729,000 59,000 7,032,000 131,000 6,773,000 224,000 6,732,000 238,000 7,234,000 952,000 7,322,000 1,517,000 6,903,000 314,000 6,688,000 125,000 6,805,000 1,026,000 6,273,000 889,000 15,401,000 -6,268,000 6,641,000 613,000 9,848,000 -224,000 -1,711,000 2,093,000 2,305,000 -184,000 1,018,000 17,000 
          proceeds from insurance settlements on venezuela seized vessels
                                                                                             
          principal payments on debt
                                                       -115,000,000               -5,000,000 -15,000,000 -80,000,000 -15,000,000 -48,000,000 5,000,000 -15,000,000   -215,000,000 -30,000,000 -20,000,000 5,000,000 -10,000,000 
          excess tax benefits on stock options exercised
                                                    21,000             -356,000 162,000   30,000 1,408,000 8,056,000 -19,437,000 1,859,000 13,243,000                     
          non-cash investing activities:
                                                                                               
          provision for venezuelan operations
                                                               -5,350,000 517,000 48,553,000                             
          excess tax liability (benefit) on stock options exercised
                                                       1,071,000    -915,000        -288,000                            
          proceeds from sales/leaseback of assets
                                                               18,480,000 83,275,000                             
          excess tax (liability) benefit on stock options exercised
                                                       -1,071,000                                        
          compensation expense—stock-based
                                                                         2,613,000 3,436,000                     
          adjustments to reconcile net earnings to net cash provided by operating activities:
                                                                                               
          principal payments on capitalized lease obligations
                                                                      -283,000 -26,158,000 -17,038,000 -1,527,000 -1,000,000                     
          proceeds from insurance settlements
                                                              8,150,000                                 
          non-cash financing activities:
                                                                                               
          capital leases
                                                                                               
          proceeds from issuance of common stock
                                                                  815,000    4,376,000     11,319,000 7,342,000   20,661,000 4,222,000 4,646,000 116,000 5,338,000 142,000 1,962,000 32,000 4,549,000 -62,000 -60,000 163,000 8,519,000 -3,632,000 529,000 3,279,000 
          gain on sales of assets
                                                                      -10,387,000 -1,757,000 -660,000 -2,102,000 -6,930,000 -2,832,000 -11,516,000 -25,726,000 -2,713,000 -81,062,000 63,278,000 -66,919,000 -1,634,000 -9,142,000 -1,590,000           
          investing activities:
                                                                                               
          repayments of advances to unconsolidated companies
                                                                             9,496,000                 
          financing activities:
                                                                                               
          excess tax (liability) benefits on stock options exercised
                                                                                               
          capitalized leases
                                                                        16,938,000 16,938,000                     
          impairment of long-lived assets
                                                                                               
          net cash from by financing activities
                                                                                               
          repayment of advances to unconsolidated companies
                                                                                               
          minority interests, net of dividends
                                                                         -4,000 -17,000                     
          net cash (used in) investing activities
                                                                          -87,042,000    -23,332,000                 
          net cash (used in) financing activities
                                                                          -73,329,000                     
          minority interests, less dividends
                                                                                               
          tax benefit on stock compensation
                                                                                               
          accounts payable and accrued expenses
                                                                           -2,975,000                    
          borrowings
                                                                                  30,000,000  -25,000,000 -25,000,000 55,000,000   164,000,000 136,000,000     
          common stock repurchases
                                                                                              
          revenues:
                                                                                               
          vessel revenues
                                                                             12,629,000 258,685,000  29,856,000 12,838,000 185,392,000  8,870,000           
          other marine revenues
                                                                             -8,470,000 11,135,000  352,000 -654,000 6,775,000  11,896,000           
          costs and expenses:
                                                                                               
          vessel operating costs
                                                                             2,806,000 119,762,000  -2,591,000 -205,000 106,210,000  3,564,000           
          costs of other marine revenues
                                                                             -7,966,000 9,914,000  292,000 344,000 4,590,000  10,914,000           
          general and administrative
                                                                             283,000 23,692,000  3,422,000 174,000 19,259,000  1,039,000           
          other income
                                                                                               
          foreign exchange gain
                                                                             804,000 -769,000  -275,000 -197,000 608,000  -658,000           
          equity in net earnings of unconsolidated companies
                                                                             927,000 2,449,000  -487,000 548,000 2,167,000  -470,000           
          minority interests
                                                                             -268,000 20,000  -6,000 51,000 -23,000  -89,000           
          interest and miscellaneous income
                                                                             -1,044,000 4,777,000  817,000 407,000 1,205,000  84,000           
          interest and other debt costs
                                                                             235,000 -2,580,000  -446,000 451,000 -2,362,000  -58,000           
          earnings before income taxes
                                                                             34,650,000 95,265,000  -37,918,000 79,773,000 39,000,000  5,063,000           
          basic earnings per common share
                                                                             620 1,250                 
          diluted earnings per common share
                                                                             630 1,230  -380 920 500  50           
          weighted-average common shares outstanding
                                                                             -1,700,914,000 57,296,433,000  42,839,000 -41,804,000 57,230,937,000  98,017,000           
          incremental common shares from stock options
                                                                             -186,373,000 711,830,000  150,897,000 194,168,000 351,098,000  90,722,000           
          adjusted weighted-average common shares
                                                                             -1,887,287,000 58,008,263,000  193,736,000 152,364,000 57,582,035,000  188,739,000           
          cash dividends declared per common share
                                                                             150  150            
          proceeds from issuance of stock options
                                                                              3,263,000                 
          compensation expense - restricted stock
                                                                                               
          impairment on long-lived assets
                                                                                               
          earnings per common share
                                                                                -390 940 500  60           
          credit facility borrowings
                                                                                            -40,000,000 55,000,000 
          compensation expense—restricted stock