7Baggers

RLI Corp
(NYSE:RLI) 

RLI stock logo

RLI Corp., an insurance holding company, underwrites property and casualty insurance in the United States and internationally. Its Casualty segment provides commercial and personal coverage products; and general liability products, such as coverage for third-party liability of commercial insureds, i...

Founded: 1965
Full Time Employees: 882
Sector: Financial Services
Industry: Insurance-Property & Casualty

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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 2020-09-30 2020-06-30 2020-03-31 2019-12-31 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 2016-09-30 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 2012-01-31 2011-09-30 2011-06-30 2011-03-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2007-12-31 
                                                                     
      net premiums earned
    411,386,000 318,462,000 407,695,000 401,904,000 398,345,000 165,076,000 389,489,000 379,065,000 360,676,000 196,024,000 318,409,000 322,280,000 307,723,000 137,473,000 291,468,000 282,810,000 269,152,000 257,919,000 253,389,000 241,000,000 228,595,000 216,630,000 208,734,000 215,582,000  211,255,000 207,541,000 204,689,000  200,815,000 196,522,000 190,027,000 182,025,000 184,331,000 183,285,000 183,595,000 180,226,000 176,918,000  179,448,000 172,339,000 169,003,000  177,747,000 168,604,000 161,132,000  163,702,000 154,553,000 144,151,000  149,943,000 141,584,000 137,280,000  146,552,000 130,826,000 116,051,000 128,334,000 121,758,000 116,264,000  122,736,000 122,492,000  
      net investment income
    42,321,000 24,864,000 41,270,000 39,418,000 36,726,000 16,881,000 36,694,000 33,961,000 32,847,000 -1,757,000 31,963,000 28,788,000 27,084,000 11,237,000 21,270,000 18,472,000 17,883,000 17,933,000 17,844,000 16,661,000 16,424,000 16,543,000 16,917,000 17,778,000  17,532,000 16,998,000 16,565,000  16,314,000 14,577,000 14,232,000 14,187,000 13,238,000 13,005,000 13,504,000 13,048,000 13,370,000  13,964,000 13,431,000 13,495,000  14,200,000 13,982,000 13,582,000  13,598,000 12,847,000 12,886,000  14,221,000 14,826,000 15,293,000  15,954,000 15,180,000 16,303,000 16,762,000 16,765,000 16,600,000  16,295,000 16,496,000  
      net realized gains
    9,559,000 -28,268,000 18,318,000 15,004,000 14,912,000 21,296,000 5,420,000 -192,000 5,994,000 561,757,000 6,558,000 5,580,000 14,620,000 -527,340,000 573,170,000 12,804,000 5,588,000 11,780,000 1,829,000 36,463,000 14,150,000 1,512,000 -2,109,000 15,152,000  3,211,000 4,764,000 9,068,000  18,808,000 20,849,000 8,460,000 35,000 -1,359,000 2,714,000 9,347,000 2,710,000                             
      net unrealized gains on equity securities
    -39,396,000 38,571,000 41,981,000 43,500,000 -42,318,000 -22,527,000 38,392,000 3,608,000 45,314,000 -136,511,000 -25,236,000 25,214,000 15,496,000 220,476,000 -26,414,000 -100,994,000 -27,810,000 35,732,000 -2,592,000 3,956,000 28,162,000 28,126,000 74,705,000 -130,395,000  4,906,000 8,810,000 33,498,000  4,848,000                                    
      consolidated revenue
    423,870,000 353,629,000 509,264,000 499,826,000 407,665,000 180,726,000 469,995,000 416,442,000 444,831,000 619,513,000 331,694,000 381,862,000 364,923,000 -158,154,000 859,494,000 213,092,000 264,813,000 323,364,000 270,470,000 298,080,000 287,331,000 262,811,000 298,247,000 118,117,000  236,904,000 238,113,000 263,820,000  240,624,000 219,337,000 185,891,000 196,247,000 196,210,000 196,914,000 206,351,000 195,984,000 201,688,000  200,946,000 190,572,000 195,784,000  197,655,000 193,017,000 181,215,000  188,299,000 171,142,000 160,721,000  169,645,000 155,746,000 163,989,000  162,329,000 156,056,000 136,826,000 149,623,000 142,814,000 139,327,000  146,016,000 144,742,000  
      losses and settlement expenses
    193,244,000 189,439,000 187,998,000 184,578,000 177,238,000 90,672,000 202,118,000 167,799,000 143,824,000 56,387,000 189,558,000 153,943,000 114,488,000 68,075,000 165,089,000 117,914,000 105,524,000 101,028,000 143,656,000 107,026,000 104,892,000 127,596,000 101,202,000 111,021,000  108,990,000 103,919,000 94,297,000  110,231,000 101,653,000 92,421,000 123,190,000 90,347,000 93,390,000 97,892,000 80,277,000 81,171,000  73,051,000 64,549,000 80,861,000  76,019,000 73,345,000 71,016,000  64,246,000 65,607,000 61,448,000  70,598,000 61,005,000 61,883,000  64,802,000 30,363,000 46,871,000 55,823,000 45,072,000 54,257,000  47,677,000 48,780,000  
      policy acquisition costs
    132,075,000 85,914,000 128,937,000 125,502,000 123,687,000 76,139,000 117,811,000 113,921,000 110,454,000 62,549,000 103,013,000 102,626,000 101,444,000 45,589,000 96,977,000 89,615,000 85,287,000 84,794,000 80,449,000 77,235,000 74,990,000 71,032,000 69,463,000 72,941,000  71,552,000 71,742,000 71,292,000  68,414,000 66,325,000 66,734,000 62,066,000 60,695,000 63,503,000 61,761,000 60,521,000 62,243,000  60,505,000 59,487,000 58,973,000  58,180,000 55,156,000 55,051,000  54,176,000 51,502,000 50,336,000  49,262,000 48,173,000 48,197,000  46,712,000 42,568,000 40,533,000 40,624,000 37,715,000 40,465,000  41,627,000 38,556,000  
      insurance operating expenses
    28,280,000 25,777,000 30,215,000 29,594,000 26,874,000 13,491,000 28,868,000 27,321,000 28,703,000 12,210,000 21,591,000 24,510,000 23,901,000 18,113,000 20,606,000 19,325,000 18,863,000 22,403,000 15,560,000 20,148,000 18,796,000 16,850,000 13,906,000 14,381,000  16,982,000 16,948,000 16,667,000  14,408,000 14,398,000 13,385,000 11,701,000 13,546,000 13,335,000 13,338,000 13,412,000 12,200,000  12,299,000 13,467,000 11,531,000  13,120,000 13,534,000 12,533,000  13,462,000 11,885,000 12,569,000  11,553,000 10,783,000 12,259,000  10,302,000 12,130,000 9,615,000 10,161,000 8,170,000 8,827,000  10,480,000 10,072,000  
      interest expense on debt
    2,353,000 2,282,000 1,364,000 1,350,000 1,335,000 2,462,000 1,617,000 1,604,000 1,618,000 2,119,000 1,873,000 2,047,000 2,008,000 1,643,000 2,013,000 2,011,000 2,010,000 1,966,000 1,906,000 1,904,000 1,901,000 1,901,000 1,903,000 1,897,000  1,861,000 1,861,000 1,861,000  1,862,000 1,858,000 1,856,000 1,856,000 1,857,000 1,856,000 1,857,000 1,856,000 1,857,000  1,857,000 1,857,000 1,856,000  1,857,000 1,874,000 1,851,000  1,513,000 1,513,000 1,512,000  1,512,000 1,525,000 1,500,000  1,513,000 1,512,000 1,512,000 1,512,000 1,513,000 1,512,000  1,512,000 1,513,000  
      general corporate expenses
    2,724,000 3,133,000 5,045,000 4,754,000 2,948,000 2,773,000 3,994,000 4,140,000 5,010,000 2,095,000 2,372,000 4,219,000 4,214,000 4,777,000 2,755,000 2,435,000 3,363,000 3,797,000 2,505,000 3,686,000 3,342,000 2,668,000 1,994,000 1,755,000  2,583,000 3,283,000 3,276,000  2,947,000 2,641,000 2,283,000 1,956,000 2,535,000 3,325,000 2,242,000 2,768,000 2,375,000  1,958,000 2,748,000 2,244,000  2,800,000 2,549,000 2,198,000  2,157,000 1,692,000 2,386,000  2,099,000 1,815,000 1,987,000  1,594,000 1,964,000 2,005,000 2,148,000 1,541,000 1,717,000  2,177,000 2,042,000  
      total expenses
    358,676,000 306,545,000 353,559,000 345,778,000 332,082,000 185,537,000 354,408,000 314,785,000 289,609,000 135,360,000 318,407,000 287,345,000 246,055,000 138,197,000 287,440,000 231,300,000 215,047,000 213,988,000 244,076,000 209,999,000 203,921,000 220,047,000 188,468,000 201,995,000  201,968,000 197,753,000 187,393,000  197,862,000 186,875,000 176,679,000 200,769,000 168,980,000 175,409,000 177,090,000 158,834,000 159,846,000  149,670,000 142,108,000 155,465,000  151,976,000 146,458,000 142,649,000  135,554,000 132,199,000 128,251,000  135,024,000 123,301,000 125,826,000  124,923,000 88,537,000 100,536,000 110,268,000 94,011,000 106,778,000  103,473,000 100,963,000  
      equity in earnings of unconsolidated investees
    2,147,000 -11,924,000 1,540,000 2,467,000 3,048,000 1,957,000 1,238,000 1,646,000 4,769,000 2,684,000 1,732,000 1,514,000 3,923,000 33,999,000 -17,352,000 11,654,000 8,759,000 7,653,000 9,043,000 13,940,000 6,424,000 8,745,000 5,100,000 4,514,000  4,011,000 8,468,000 5,314,000  3,587,000 7,100,000 5,166,000 3,660,000 6,806,000 4,938,000 1,881,000 5,191,000 3,751,000  661,000 6,186,000 4,194,000  2,915,000 5,864,000 3,425,000                    
      earnings before income taxes
    67,341,000 35,160,000 157,245,000 156,515,000 78,631,000 -2,854,000 116,825,000 103,303,000 159,991,000 486,837,000 15,019,000 96,031,000 122,791,000 -262,352,000 554,702,000 -6,554,000 58,525,000 117,029,000 35,437,000 102,021,000 89,834,000 51,509,000 114,879,000 -79,364,000  38,947,000 48,828,000 81,741,000  46,349,000 39,562,000 14,378,000 -862,000 34,036,000 26,443,000 31,142,000 42,341,000 45,593,000  51,937,000 54,650,000 44,513,000  48,594,000 52,423,000 41,991,000  55,309,000 43,576,000 35,969,000  36,480,000 36,568,000 41,109,000  38,119,000 71,405,000 38,906,000 41,003,000 52,229,000 34,802,000  43,663,000 46,503,000  
      income tax expense
    12,456,000 1,541,000 32,635,000 32,179,000 15,417,000 -2,546,000 21,798,000 21,311,000 32,091,000 93,425,000 1,483,000 18,379,000 23,980,000 -56,129,000 114,809,000  10,602,000 21,745,000 6,194,000 20,206,000  9,122,000 22,713,000   6,623,000 8,361,000 16,268,000   6,311,000 2,162,000  7,828,000 6,615,000 8,879,000 13,264,000 14,200,000  16,029,000 17,465,000 13,915,000  15,340,000 16,698,000 13,022,000  17,662,000 13,674,000 11,122,000  11,017,000 11,820,000 13,071,000  12,062,000 24,024,000 12,445,000 13,038,000 17,235,000    12,423,000  
      net earnings
    54,885,000 33,619,000 124,610,000 124,336,000 63,214,000 -308,000 95,027,000 81,992,000 127,900,000 393,412,000 13,536,000 77,652,000 98,811,000 -206,223,000 439,893,000 -2,239,000 47,923,000 95,284,000 29,243,000 81,815,000 73,012,000 42,387,000 92,166,000 -61,267,000  32,324,000 40,467,000 65,473,000  39,372,000 33,251,000 12,216,000 1,734,000 26,208,000 19,828,000 22,263,000 29,077,000 31,393,000  35,908,000 37,185,000 30,598,000  33,254,000 35,725,000 28,969,000  37,647,000 29,902,000 24,847,000  25,463,000 24,748,000 28,038,000  26,057,000 47,381,000 26,461,000 27,965,000 34,994,000 24,221,000  31,019,000 34,080,000  
      yoy
    -13.18% -11015.26% 31.13% 51.64% -50.58% -100.08% 602.03% 5.59% 29.44% -290.77% -96.92% -3568.16% 106.19% -316.43% 1404.27% -102.74% -34.36% 124.80% -68.27% -233.54%  31.13% 127.76% -193.58%  -17.90% 21.70% 435.96%  50.23% 67.70% -45.13% -94.04% -16.52%  -38.00% -21.80% 2.60%  7.98% 4.09% 5.62%  -11.67% 19.47% 16.59%  47.85% 20.83% -11.38%  -2.28% -47.77% 5.96%  -25.54% 95.62%  -9.85% 2.68%      
      qoq
    63.26% -73.02% 0.22% 96.69% -20624.03% -100.32% 15.90% -35.89% -67.49% 2806.41% -82.57% -21.41% -147.91% -146.88% -19746.85% -104.67% -49.71% 225.84% -64.26% 12.06% 72.25% -54.01% -250.43%   -20.12% -38.19%   18.41% 172.19% 604.50% -93.38% 32.18% -10.94% -23.43% -7.38%   -3.43% 21.53%   -6.92% 23.32%   25.90% 20.34%   2.89% -11.73%   -45.01% 79.06% -5.38% -20.09% 44.48%   -8.98%   
      other comprehensive earnings, net of tax
    -25,366,000 -83,825,000 27,674,000 18,701,000 30,030,000 2,994,000 80,293,000 -7,843,000 -12,671,000 -240,054,000 -56,834,000 -19,721,000 37,707,000 235,504,000 -81,248,000 -97,563,000 -115,581,000 -17,078,000 -12,240,000 15,177,000 -44,747,000 9,550,000 53,571,000 -13,031,000  15,341,000 27,864,000 29,301,000  -7,696,000 -7,675,000 -26,398,000 8,444,000 10,599,000 11,769,000 -6,931,000 19,066,000 21,763,000  -16,136,000 -24,932,000 -7,595,000  -12,353,000 19,934,000 17,737,000    17,553,000       2,760,000 5,248,000 30,476,000  9,275,000  36,969,000 22,810,000  
      comprehensive earnings
    29,519,000 -50,206,000 152,284,000 143,037,000 93,244,000 2,686,000 175,320,000 74,149,000 115,229,000 153,358,000 -43,298,000 57,931,000 136,518,000 29,281,000 358,645,000 -99,802,000 -67,658,000 78,206,000 17,003,000 96,992,000 28,265,000 51,937,000 145,737,000 -74,298,000  47,665,000 68,331,000 94,774,000  31,676,000 25,576,000 -14,182,000 10,178,000 36,807,000 31,597,000 15,332,000 48,143,000 53,156,000  19,772,000 12,253,000 23,003,000  20,901,000 55,659,000 46,706,000  35,701,000 -3,579,000 42,400,000  46,510,000 30,638,000 38,814,000  11,726,000 50,141,000 31,709,000 58,441,000 23,229,000 33,496,000  67,988,000 56,890,000  
      basic net earnings per share
    0.6 0.38 1.36 1.35 0.69 -3.33 2.08 1.79 2.8 8.69 0.3 1.7 2.17 -4.53 9.69 -0.05 1.06 2.11 0.65 1.81 1.62 0.94 2.05 -1.36  0.72 0.91 1.47  0.89 0.75 0.28 0.04 0.6 0.45 0.51 0.67 0.72  0.83 0.86 0.71  0.77 0.83 0.67  1.76 1.4 1.17  1.2 1.17 1.32  1.24 2.25 1.26 1.34 1.66 1.14  1.43 1.58  
      diluted net earnings per share
    0.6 0.36 1.35 1.34 0.68 -3.29 2.06 1.78 2.77 8.62 0.29 1.69 2.15 -4.5 9.61 -0.05 1.05 2.08 0.64 1.79 1.6 0.93 2.04 -1.36  0.71 0.89 1.46  0.88 0.74 0.27 0.04 0.59 0.45 0.5 0.65 0.71  0.81 0.84 0.7  0.76 0.82 0.66  1.73 1.38 1.15  1.19 1.15 1.3  1.22 2.22 1.24 1.33 1.65 1.13  1.42 1.57  
      weighted-average number of common shares outstanding:
                                                                     
      basic
    91,926 91,529 91,849 91,827 91,770 91,191 45,780 45,737 45,684 45,368 45,622 45,591 45,530 45,230 45,379 45,354 45,306 45,230 45,243 45,226 45,178 45,014 44,951 44,920 44,734 44,823 44,704 44,536 44,358 44,400 44,310 44,221 44,058 44,005 43,961 43,843 43,721 43,597 43,299 43,342 43,210 43,141 43,020 43,026 43,001 42,985 42,744 21,422 21,314 21,272 21,216 21,218 21,213 21,188 21,078 21,089 21,075 21,025 20,931 21,026 21,176 21,562 21,622 21,617  
      diluted
    92,187 92,451 92,310 92,518 92,528 92,155 46,220 46,179 46,163 45,794 46,065 46,044 46,035 45,712 45,775 45,354 45,714 45,712 45,689 45,715 45,674 45,426 45,274 44,920 45,257 45,349 45,219 44,887 44,835 44,940 44,742 44,650 44,515 44,519 44,502 44,492 44,423 44,361 44,131 44,153 44,019 43,992 43,819 43,712 43,688 43,674 43,514 21,773 21,670 21,623 21,580 21,486 21,514 21,528 21,434 21,335 21,332 21,285 21,090 21,223 21,372 21,731 21,769 21,721  
      ​
                                                                     
      income tax benefit
                   -4,315,000     16,822,000   -18,097,000      6,977,000   -2,596,000                            10,581,000  12,644,000   
      earnings per share:
                                                                     
      basic:
                                                                     
      basic comprehensive earnings per share
                         1.15 3.24 -1.65  1.06 1.53 2.13  0.71 0.58 -0.32 0.23 0.84 0.72 0.35 1.1 1.22  0.46 0.28 0.53  0.49 1.29 1.09  1.67 -0.17 1.99  2.19 1.44 1.83  0.56 2.38 1.51 2.79 1.1 1.58  3.14 2.63  
      diluted:
                                                                     
      diluted comprehensive earnings per share
                         1.14 3.22 -1.65  1.05 1.51 2.11  0.7 0.57 -0.32 0.23 0.83 0.71 0.34 1.08 1.2  0.45 0.28 0.52  0.48 1.27 1.07  1.64 -0.17 1.96  2.16 1.42 1.8  0.55 2.35 1.49 2.77 1.09 1.57  3.12 2.62  
      other-than-temporary impairment (otti) losses on investments
                                 -161,000  -56,000   -2,090,000 -95,000                              
      cash dividends paid per common share
                             0.23 0.23 0.22  0.22 0.22 0.21 0.21 0.21 0.2 0.2 0.2 0.19  0.19 0.19 0.18  0.18 0.18 0.17                    
      net unrealized losses on equity securities
                                  -12,611,000 -26,772,000                                  
      weighted-average number of common shares outstanding
                                                                     
      basic
    91,926 91,529 91,849 91,827 91,770 91,191 45,780 45,737 45,684 45,368 45,622 45,591 45,530 45,230 45,379 45,354 45,306 45,230 45,243 45,226 45,178 45,014 44,951 44,920 44,734 44,823 44,704 44,536 44,358 44,400 44,310 44,221 44,058 44,005 43,961 43,843 43,721 43,597 43,299 43,342 43,210 43,141 43,020 43,026 43,001 42,985 42,744 21,422 21,314 21,272 21,216 21,218 21,213 21,188 21,078 21,089 21,075 21,025 20,931 21,026 21,176 21,562 21,622 21,617  
      diluted
    92,187 92,451 92,310 92,518 92,528 92,155 46,220 46,179 46,163 45,794 46,065 46,044 46,035 45,712 45,775 45,354 45,714 45,712 45,689 45,715 45,674 45,426 45,274 44,920 45,257 45,349 45,219 44,887 44,835 44,940 44,742 44,650 44,515 44,519 44,502 44,492 44,423 44,361 44,131 44,153 44,019 43,992 43,819 43,712 43,688 43,674 43,514 21,773 21,670 21,623 21,580 21,486 21,514 21,528 21,434 21,335 21,332 21,285 21,090 21,223 21,372 21,731 21,769 21,721  
      net realized investment gains
                                         11,400,000  7,534,000 4,802,000 13,286,000  5,708,000 10,431,000 6,501,000  10,999,000 3,742,000 3,684,000  5,481,000 492,000 11,416,000  80,000 10,050,000 4,472,000 4,527,000 4,291,000 6,463,000  6,985,000 12,520,000  
      equity in earnings of unconsolidated investee
                                                   2,564,000 4,633,000 3,499,000  1,859,000 4,123,000 2,946,000  713,000 3,886,000 2,616,000 1,648,000 3,426,000 2,253,000  1,120,000 2,724,000  
      cash dividends declared per common share
                                                   0.34 0.34 0.32  0.32 0.32 0.3  0.3 0.3 0.29 0.29 0.29 0.28  0.27 0.27  
      unrealized gains on securities:
                                                                     
      unrealized holding gains arising during the period
                                                       25,127,000 5,430,000 19,509,000            
      less: reclassification adjustment for (gains) losses included in net earnings
                                                                     
      other comprehensive earnings
                                                       21,047,000 5,890,000 10,776,000            
      less: reclassification adjustment for losses (gains) included in net earnings
                                                        460,000             
      less: reclassification adjustment for (gains) included in net earnings
                                                                     
      other-than-temporary impairment losses on investments
                                                                     
    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 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 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 2011-03-31 2011-01-31 2010-12-31 2009-12-31 2008-12-31 2007-12-31 2007-06-30 
                                                                      
        assets
                                                                      
        investments and cash:
                                                                      
        fixed income:
                                                                      
        available-for-sale, at fair value
      3,528,692,000 3,533,336,000 3,536,484,000 3,420,761,000 3,274,276,000 3,175,796,000 3,176,073,000 2,989,527,000 2,863,321,000 2,855,849,000 2,717,627,000 2,689,100,000 2,701,814,000 2,666,950,000 2,452,039,000 2,280,909,000 2,292,378,000 2,409,887,000 2,394,669,000 2,319,244,000 2,175,869,000 2,196,626,000 2,159,795,000 2,075,093,000 1,963,585,000 1,983,086,000 1,957,025,000 1,865,613,000 1,793,343,000 1,760,515,000 1,719,617,000 1,710,612,000 1,653,674,000 1,672,239,000 1,713,558,000 1,651,657,000 1,590,399,000 1,605,209,000 1,687,605,000 1,631,953,000 1,556,968,000 1,538,110,000 1,532,304,000 1,537,365,000 1,529,559,000 1,495,087,000 1,545,530,000 1,534,622,000 1,467,282,000 1,440,052,000 1,379,012,000 1,399,510,000 1,413,570,000 20,599,000 1,432,969,000 1,312,839,000 1,251,451,000 1,084,279,000 27,547,000 30,035,000 15,903,000 28,925,000 30,293,000 1,288,799,000 
        equity securities, at fair value
      864,912,000 898,876,000 878,872,000 810,959,000 725,946,000 736,191,000 729,738,000 666,563,000 643,367,000 590,041,000 534,436,000 552,566,000 519,097,000 498,382,000 462,988,000 487,995,000 608,180,000 613,776,000 565,238,000 566,870,000 555,209,000 524,006,000 455,956,000 422,198,000 356,403,000 460,630,000 428,297,000 421,801,000 388,281,000 340,483,000 394,375,000 386,603,000 378,253,000          369,047,000 391,152,000 391,663,000  419,022,000 436,462,000 426,680,000  392,156,000 416,814,000 407,680,000  402,099,000 406,074,000 406,399,000 335,006,000      365,483,000 
        short-term investments, at cost which approximates fair value
      386,219,000 120,562,000 165,706,000 115,662,000 116,601,000 74,915,000 203,296,000 125,865,000 147,186,000 134,923,000 125,032,000 271,296,000 116,202,000 36,229,000             5,534,000 47,353,000 44,087,000 11,550,000 18,526,000   9,980,000 11,925,000 18,057,000 13,002,000 5,015,000 8,392,000 13,491,000 19,405,000 6,262,000    16,339,000    23,232,000    431,000     11,217,000 1,019,000 16,091,000 2,667,000 466,000  
        other invested assets
      60,509,000 59,281,000 56,494,000 57,266,000 60,357,000 57,939,000 53,993,000 55,364,000 59,273,000 59,081,000 59,730,000 60,907,000 64,134,000 47,922,000 48,837,000 51,018,000 52,406,000 50,501,000 52,480,000 52,849,000 50,413,000 54,232,000 59,988,000 63,440,000 53,562,000 70,441,000 59,577,000 55,196,000 54,262,000 51,542,000 38,777,000 36,562,000 35,065,000 33,808,000 25,998,000 25,310,000 24,199,000 24,115,000 24,502,000 24,891,000 25,279,000 20,666,000 10,873,000 11,069,000 11,402,000 11,597,000 11,688,000                  
        cash
      49,121,000 51,565,000 52,621,000 21,414,000 27,058,000 39,790,000 60,634,000 50,030,000 44,557,000 36,424,000 18,445,000 16,707,000 22,769,000 22,818,000 723,511,000 113,044,000 72,148,000 88,804,000 89,618,000 95,457,000 94,935,000 62,217,000 70,589,000 84,797,000 42,701,000 46,203,000 64,048,000 24,834,000 25,181,000 30,140,000 59,469,000 34,102,000 28,927,000 24,271,000 26,877,000 21,355,000 28,144,000 18,269,000 13,970,000 29,639,000 14,569,000 11,081,000 28,188,000 27,087,000 31,514,000 30,620,000 77,037,000 27,234,000 20,618,000 39,469,000 87,398,000 12,757,000 22,371,000 14,023,000 31,301,000 32,175,000 70,306,000  346,000 26,000 109,000 375,000 1,000  
        total investments and cash
      4,889,453,000 4,663,620,000 4,690,177,000 4,426,062,000 4,204,238,000 4,084,631,000 4,223,734,000 3,887,349,000 3,757,704,000 3,676,318,000 3,455,270,000 3,590,576,000 3,424,016,000 3,272,301,000 3,687,375,000 2,932,966,000 3,025,112,000 3,162,968,000 3,102,005,000 3,034,420,000 2,876,426,000 2,837,081,000 2,746,328,000 2,645,528,000 2,416,251,000 2,560,360,000 2,514,481,000 2,414,797,000 2,305,154,000 2,194,230,000 2,230,764,000 2,167,879,000 2,095,919,000 2,140,790,000 2,171,571,000 2,104,181,000 2,039,673,000 2,021,827,000 2,116,751,000 2,098,799,000 2,005,772,000 1,951,543,000 1,999,395,000 1,976,842,000 1,980,146,000 1,964,285,000 2,063,990,000 2,017,457,000 1,952,261,000 1,922,058,000 1,882,211,000 1,840,548,000 1,852,828,000  1,960,302,000 1,908,595,000 1,948,371,000        
        accrued investment income
      30,456,000 30,026,000 29,584,000 31,113,000 27,932,000 28,319,000 26,711,000 26,683,000 25,353,000 24,062,000 25,328,000 22,525,000 21,118,000 21,259,000 19,355,000 18,465,000 17,477,000 17,505,000 17,143,000 17,240,000 16,109,000 16,126,000 15,685,000 15,142,000 14,944,000 14,587,000 14,547,000 14,597,000 14,080,000 14,033,000 14,417,000 14,473,000 14,079,000 15,166,000 15,161,000 15,204,000 13,958,000 14,593,000 13,311,000 14,303,000 13,261,000 14,878,000 13,741,000 15,052,000 12,411,000 14,629,000 13,595,000 15,229,000 13,256,000 15,710,000 12,781,000 14,849,000 12,904,000  13,071,000 14,094,000 11,862,000 12,386,000      18,556,000 
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 21,696 at 3/31/26 and 23,673 at 12/31/25
      243,451,000                                                                
        ceded unearned premium
      118,476,000  123,039,000 121,090,000 117,790,000  120,845,000 114,893,000 107,822,000  111,072,000 112,353,000 119,975,000  137,346,000 132,417,000 126,311,000  127,765,000 120,116,000 111,071,000  102,902,000 93,679,000 88,789,000  88,174,000 78,957,000 71,011,000  66,400,000 65,007,000 57,356,000  54,186,000 52,654,000 48,804,000  54,014,000 52,536,000 49,164,000  52,161,000 52,603,000 49,011,000  62,646,000 72,396,000 58,835,000  69,842,000 79,493,000 69,888,000  73,082,000 74,598,000 61,998,000 56,670,000      83,385,000 
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 11,479 at 3/31/26 and 11,107 at 12/31/25
      740,503,000                                                                
        deferred policy acquisition costs
      176,187,000 172,648,000 181,488,000 180,765,000 169,628,000 166,214,000 172,069,000 167,295,000 152,924,000 146,566,000 150,666,000 148,336,000 134,995,000 127,859,000 128,979,000 123,055,000 112,004,000 103,553,000 104,309,000 99,898,000 92,595,000 88,425,000 89,818,000 87,560,000 84,208,000 85,044,000 86,523,000 85,952,000 82,893,000 84,934,000 84,232,000 83,624,000 77,622,000 77,716,000 77,782,000 76,276,000 71,995,000 73,147,000 75,805,000 75,416,000 69,489,000 69,829,000 72,300,000 71,575,000 65,247,000 65,123,000 68,372,000 68,190,000 62,586,000 61,508,000 63,215,000 62,007,000 55,130,000  55,777,000 55,924,000 51,655,000 72,744,000      77,137,000 
        property and equipment, at cost, net of accumulated depreciation of 86,547 at 3/31/26 and 84,459 at 12/31/25
      39,809,000                                                                
        investment in unconsolidated investees
      56,053,000 53,521,000 63,652,000 61,183,000 56,684,000 56,477,000 65,271,000 67,249,000 66,134,000 56,966,000 56,110,000 55,250,000 52,398,000 58,275,000 58,105,000 187,310,000 179,351,000 171,311,000 158,721,000 148,561,000 134,314,000 128,382,000 128,154,000 112,662,000 108,081,000 103,836,000 113,528,000 108,977,000 100,174,000 94,967,000 95,007,000 91,594,000 85,564,000 90,067,000 88,374,000 84,032,000 76,833,000 72,240,000 82,276,000 80,144,000 74,548,000 70,784,000 71,451,000 71,179,000 65,089,000 60,046,000 67,250,000 64,487,000 58,568,000       56,558,000 53,146,000 46,368,000      36,482,000 
        goodwill and intangibles
      53,562,000 53,562,000 53,562,000 53,562,000 53,562,000 53,562,000 53,562,000 53,562,000 53,562,000 53,562,000 53,562,000 53,562,000 53,562,000 53,562,000 53,562,000 53,562,000 53,562,000 53,562,000 53,562,000 53,582,000 53,617,000 53,719,000 53,821,000 53,923,000 54,025,000 54,127,000 54,228,000 54,330,000 54,432,000 54,534,000 54,626,000 54,693,000 54,793,000 59,302,000 59,427,000 60,582,000 64,165,000 64,371,000 64,578,000 64,785,000 72,232,000 71,294,000 72,026,000 72,249,000 72,472,000 72,695,000 74,172,000 74,407,000 74,641,000 74,876,000 75,140,000 75,463,000 75,787,000  59,780,000 60,014,000 60,248,000        
        other assets
      53,873,000 63,683,000 63,263,000 60,660,000 51,465,000 77,720,000 84,068,000 58,715,000 72,461,000 69,348,000 84,744,000 54,693,000 47,275,000 75,923,000 52,128,000 44,912,000 39,748,000 40,961,000 38,985,000 33,566,000 33,181,000 31,501,000 44,293,000 38,738,000 39,047,000 36,104,000 41,816,000 43,050,000 51,149,000 18,926,000 14,100,000 15,957,000 11,321,000 14,084,000 15,787,000 18,367,000 12,708,000 10,065,000 23,999,000 14,875,000 13,307,000 16,810,000 14,598,000 9,664,000 11,035,000 12,575,000 12,537,000 11,292,000 9,254,000 8,264,000 18,932,000 10,391,000 10,593,000 397,000 13,199,000 10,514,000 15,198,000 9,586,000 482,000 499,000 497,000 777,000 996,000 9,878,000 
        total assets
      6,401,823,000 6,161,486,000 6,247,000,000 5,990,807,000 5,729,154,000 5,628,802,000 5,791,755,000 5,511,673,000 5,338,409,000 5,180,221,000 5,083,526,000 5,065,846,000 4,836,219,000 4,767,068,000 5,211,665,000 4,401,763,000 4,407,635,000 4,508,302,000 4,432,666,000 4,280,630,000 3,972,440,000 3,938,485,000 3,792,501,000 3,619,279,000 3,378,611,000 3,545,721,000 3,505,064,000 3,375,109,000 3,236,875,000 3,105,065,000 3,073,522,000 3,007,805,000 2,894,192,000 2,947,244,000 2,956,520,000 2,881,582,000 2,777,518,000 2,777,633,000 2,913,534,000 2,892,213,000 2,759,854,000 2,736,579,000 2,829,389,000 2,815,185,000 2,780,564,000 2,775,542,000 2,933,483,000 2,908,996,000 2,791,347,000 2,740,310,000 2,886,637,000 2,675,675,000 2,620,279,000 914,954,000 2,754,154,000 2,689,505,000 2,678,950,000 2,522,930,000 944,369,000 911,818,000 961,530,000 834,026,000 901,919,000 2,807,933,000 
        liabilities and shareholders’ equity
                                                                      
        liabilities
                                                                      
        unpaid losses and settlement expenses
      2,927,929,000 2,886,819,000 2,873,054,000 2,806,889,000 2,743,245,000 2,693,470,000 2,611,941,000 2,544,622,000 2,532,190,000 2,446,025,000 2,488,695,000 2,361,577,000 2,286,063,000 2,315,637,000 2,322,737,000 2,150,519,000 2,081,712,000 2,043,555,000 2,033,517,000 1,917,609,000 1,795,275,000 1,750,049,000 1,686,876,000 1,590,996,000 1,574,760,000 1,574,352,000 1,557,358,000 1,506,279,000 1,479,344,000 1,461,348,000 1,377,111,000 1,343,248,000 1,303,131,000 1,271,503,000 1,253,729,000 1,183,185,000 1,152,027,000 1,139,337,000 1,150,938,000 1,123,472,000 1,121,363,000 1,103,785,000 1,140,733,000 1,142,596,000 1,150,795,000 1,121,040,000 1,152,413,000 1,127,073,000 1,141,735,000 1,129,433,000 1,135,698,000 1,111,491,000 1,111,725,000  1,134,593,000 1,109,502,000 1,121,730,000 1,173,849,000      1,321,702,000 
        unearned premiums
      991,717,000 991,636,000 1,035,756,000 1,034,176,000 975,721,000 984,140,000 1,010,760,000 992,754,000 904,848,000 892,326,000 906,139,000 891,103,000 801,465,000 785,085,000 786,485,000 754,192,000 696,577,000 680,444,000 673,809,000 640,895,000 590,364,000 586,386,000 570,754,000 543,113,000 516,867,000 540,213,000 532,493,000 513,819,000 482,325,000 496,505,000 483,305,000 482,156,000 444,296,000 451,449,000 443,110,000 436,477,000 412,862,000 433,777,000 449,051,000 445,620,000 407,606,000 422,094,000 432,278,000 430,632,000 388,776,000 401,412,000 429,867,000 444,453,000 390,968,000 392,081,000 416,886,000 429,858,000 374,857,000  384,414,000 385,344,000 340,915,000 292,159,000      374,441,000 
        reinsurance balances payable
      23,455,000 40,580,000 35,951,000 32,773,000 27,693,000 44,681,000 43,423,000 38,968,000 35,157,000 71,507,000 56,570,000 35,931,000 28,091,000 61,100,000 50,349,000 39,291,000 26,264,000 42,851,000 38,093,000 34,946,000 26,560,000 42,265,000 31,646,000 24,777,000 30,865,000 25,691,000 25,690,000 21,227,000 14,286,000 22,591,000 18,396,000 18,938,000 12,233,000 21,624,000 21,006,000 22,216,000 16,612,000 17,928,000 17,425,000 17,679,000 15,588,000 37,556,000 38,829,000 36,915,000 33,083,000 38,013,000 37,683,000 62,402,000 44,784,000 47,334,000 44,530,000 41,232,000 26,041,000  65,793,000 64,122,000 52,318,000 18,137,000      83,663,000 
        funds held
      134,215,000 127,242,000 113,753,000 120,019,000 105,721,000 97,380,000 98,585,000 107,235,000 106,430,000 101,446,000 103,424,000 102,429,000 102,797,000 101,144,000 100,547,000 101,983,000 89,735,000 89,773,000 89,288,000 89,474,000 85,572,000 81,747,000 79,774,000 84,430,000 80,333,000 83,358,000 78,161,000 76,331,000 74,043,000 72,309,000 73,304,000 68,795,000 67,415,000 74,560,000 75,294,000 75,152,000 74,138,000 72,742,000 77,902,000 72,558,000 54,094,000 54,254,000 54,237,000 54,055,000 53,713,000 51,481,000 53,834,000 59,398,000 58,850,000 61,656,000 64,047,000 57,759,000 59,637,000  57,604,000 59,595,000 111,362,000        
        income taxes-current
      26,797,000  9,792,000 10,009,000 24,735,000  4,369,000 7,610,000 25,455,000  5,546,000 5,326,000 15,802,000  132,446,000                                                 7,661,000 
        income taxes-deferred
      5,566,000  23,157,000 3,475,000 10,043,000  15,369,000 12,291,000 10,700,000  51,403,000 29,864,000 27,571,000  51,791,000 2,389,000 47,412,000  78,308,000 82,110,000 74,624,000  66,008,000 57,421,000 26,546,000  55,910,000 50,487,000 39,672,000  38,260,000 36,432,000 40,234,000  84,982,000 79,868,000 72,192,000  85,152,000 86,930,000 76,186,000  60,583,000 68,462,000 79,356,000  77,086,000 81,963,000 68,995,000  54,337,000 51,586,000 68,049,000  63,553,000 50,905,000 43,837,000 37,121,000      21,118,000 
        short-term debt
      50,000,000 100,000,000    100,000,000                                                           
        long-term debt
      297,247,000              50,000,000   199,676,000                                               
        accrued expenses
      68,016,000 128,597,000 110,660,000 80,958,000 63,454,000 124,242,000 105,813,000 83,805,000 68,216,000 108,880,000 85,640,000 70,220,000 57,480,000 94,869,000 81,066,000 68,052,000 57,101,000 98,274,000 74,155,000 60,849,000 45,784,000 75,925,000 46,516,000 35,998,000 27,536,000 66,626,000 47,952,000 41,046,000 28,896,000 45,124,000 45,420,000 38,384,000 26,621,000 52,848,000 35,682,000 35,130,000 27,791,000 51,992,000 40,029,000 39,352,000 33,558,000 55,742,000 47,609,000 40,303,000 33,902,000 63,148,000 52,392,000 40,199,000 34,069,000 59,596,000 49,108,000 34,895,000 34,206,000  45,499,000 36,888,000 42,558,000 27,182,000       
        other liabilities
      80,491,000 56,923,000 70,701,000 67,847,000 84,373,000 62,173,000 53,145,000 51,972,000 45,361,000 42,766,000 38,421,000 47,392,000 40,690,000 32,029,000 144,226,000 41,380,000 55,689,000 40,859,000 45,611,000 63,362,000 49,939,000 36,411,000 62,145,000 81,691,000 56,650,000 54,064,000 58,625,000 56,764,000 74,442,000 26,993,000 16,802,000 21,033,000 18,354,000 18,966,000 14,680,000 22,985,000 25,233,000 25,050,000 21,929,000 44,420,000 30,664,000 26,018,000 22,311,000 24,677,000 29,308,000 23,476,000 47,080,000 24,509,000 32,777,000 13,861,000 17,453,000 24,217,000 12,249,000 474,000 8,329,000 29,424,000 37,553,000 54,622,000 571,000 772,000 660,000 624,000 637,000 88,123,000 
        total liabilities
      4,605,433,000 4,383,290,000 4,372,824,000 4,256,146,000 4,124,942,000 4,106,835,000 4,043,405,000 3,926,966,000 3,817,657,000 3,766,707,000 3,784,435,000 3,713,934,000 3,532,298,000 3,589,727,000 3,817,672,000 3,357,575,000 3,254,213,000 3,278,941,000 3,182,410,000 3,038,827,000 2,817,654,000 2,802,507,000 2,693,161,000 2,567,821,000 2,462,906,000 2,550,333,000 2,505,444,000 2,415,161,000 2,342,170,000 2,298,223,000 2,201,666,000 2,158,008,000 2,061,259,000 2,093,646,000 2,077,364,000 2,003,848,000 1,929,643,000 1,954,061,000 1,991,120,000 1,978,679,000 1,887,660,000 1,913,110,000 1,946,238,000 1,947,287,000 1,918,569,000 1,930,480,000 1,999,970,000 1,989,601,000 1,921,771,000 1,911,344,000 2,032,059,000 1,851,038,000 1,786,764,000 118,591,000 1,859,785,000 1,835,780,000 1,850,273,000 1,703,070,000 125,517,000 120,442,000 129,280,000 125,872,000 127,497,000 2,023,669,000 
        shareholders’ equity
                                                                      
        common stock
                                       67,079,000    66,875,000    66,474,000    66,033,000    65,913,000    32,728,000 32,686,000 32,683,000   32,627,000 32,318,000 32,179,000 32,106,000 31,870,000  
        paid-in capital
      380,075,000 376,679,000 374,468,000 372,539,000 370,422,000 367,645,000 371,398,000 369,785,000 366,701,000 362,345,000 360,453,000 357,656,000 355,254,000 352,391,000 352,129,000 349,161,000 346,791,000 343,742,000 340,868,000 338,099,000 336,757,000 335,365,000 332,629,000 325,862,000 325,052,000 321,190,000 318,092,000 315,766,000 308,551,000 305,660,000 303,399,000 303,245,000 235,694,000 233,077,000 233,954,000 233,471,000 231,253,000  229,107,000 226,913,000 225,072,000  220,738,000 217,165,000 215,345,000  212,733,000 211,774,000 209,908,000  240,125,000 238,699,000 236,801,000  233,442,000 232,521,000 231,331,000 217,855,000      189,980,000 
        accumulated other comprehensive earnings
      -113,440,000 -88,074,000 -97,318,000 -124,992,000 -143,693,000 -173,723,000 -106,524,000 -186,817,000 -178,974,000 -166,303,000 -267,924,000 -211,090,000 -191,369,000 -229,076,000 -244,566,000 -163,318,000 -65,755,000 49,826,000 66,904,000 79,144,000 63,967,000 108,714,000 102,585,000 93,035,000 39,464,000  57,934,000 42,593,000 14,729,000  -22,344,000 -14,648,000 -6,973,000  153,422,000 144,978,000 134,379,000  157,672,000 164,603,000 145,537,000  122,720,000 138,856,000 163,788,000  161,345,000 173,698,000 153,764,000  125,296,000 127,242,000 160,723,000  155,038,000 133,991,000 128,101,000 101,240,000      90,792,000 
        retained earnings
      1,921,376,000 1,881,213,000 1,988,648,000 1,878,736,000 1,769,106,000 1,719,668,000 1,875,788,000 1,794,051,000 1,725,337,000 1,609,785,000 1,598,875,000 1,597,660,000 1,532,350,000 1,446,341,000 1,678,746,000 1,250,661,000 1,264,703,000 1,228,110,000 1,234,801,000 1,216,877,000 1,146,380,000 1,084,217,000 1,056,445,000 1,024,881,000 943,509,000 1,014,046,000 1,015,915,000 993,911,000 963,749,000 908,079,000 983,126,000 953,526,000 930,028,000 788,522,000 817,789,000 825,307,000 808,342,000 797,307,000 861,797,000 848,312,000 827,982,000 804,875,000 866,378,000 838,713,000 809,740,000 786,908,000 886,477,000 860,968,000 832,984,000 811,320,000 849,244,000 818,889,000 796,242,000 778,202,000 866,202,000 847,529,000 829,569,000 854,732,000 834,111,000 834,375,000 877,791,000 807,195,000 749,767,000 666,497,000 
        deferred compensation
      11,536,000 14,082,000 12,713,000 12,611,000 11,812,000 13,498,000 11,917,000 13,183,000 12,749,000 13,539,000 12,617,000 12,507,000 12,264,000 12,015,000 9,047,000 8,945,000 8,669,000 9,642,000 8,330,000 8,251,000 7,926,000 8,292,000 7,703,000 7,600,000 6,970,000 7,980,000 7,788,000 7,530,000 7,315,000 8,354,000 7,765,000 7,936,000 8,056,000 8,640,000 7,666,000 7,642,000 11,265,000 11,496,000 10,395,000 10,467,000 10,585,000 10,647,000 9,342,000 14,042,000 13,946,000 13,769,000 11,687,000 11,626,000 11,565,000 11,562,000 10,482,000 10,330,000 10,162,000 11,106,000 10,175,000 9,912,000 9,179,000 8,376,000 10,445,000 6,474,000 7,989,000 8,312,000 7,980,000 7,576,000 
        less: treasury shares, at cost
      -404,535,000  -405,712,000 -405,610,000 -404,811,000  -404,916,000 -406,182,000 -405,748,000  -405,616,000 -405,506,000 -405,263,000  -402,046,000 -401,944,000 -401,668,000  -401,329,000 -401,250,000                                             
        total shareholders’ equity
      1,796,390,000  1,874,176,000 1,734,661,000 1,604,212,000  1,748,350,000 1,584,707,000 1,520,752,000  1,299,091,000 1,351,912,000 1,303,921,000  1,393,993,000 1,044,188,000 1,153,422,000  1,250,256,000 1,241,803,000 1,154,786,000  1,099,340,000 1,051,458,000 915,705,000 995,388,000 999,620,000 959,948,000 894,705,000 806,842,000 871,856,000 849,797,000 832,933,000 853,598,000 879,156,000 877,734,000 847,875,000 823,572,000 922,414,000 913,534,000 872,194,000 823,469,000 883,151,000 867,898,000 861,995,000 845,062,000 933,513,000 919,395,000 869,576,000 828,966,000 854,578,000 824,637,000 833,515,000 796,363,000 894,369,000 853,725,000 828,677,000 819,860,000 818,852,000 791,376,000  708,154,000   
        total liabilities and shareholders’ equity
      6,401,823,000  6,247,000,000 5,990,807,000 5,729,154,000  5,791,755,000 5,511,673,000 5,338,409,000  5,083,526,000 5,065,846,000 4,836,219,000  5,211,665,000 4,401,763,000 4,407,635,000  4,432,666,000 4,280,630,000 3,972,440,000  3,792,501,000 3,619,279,000 3,378,611,000 3,545,721,000 3,505,064,000 3,375,109,000 3,236,875,000 3,105,065,000 3,073,522,000 3,007,805,000 2,894,192,000 2,947,244,000 2,956,520,000 2,881,582,000 2,777,518,000 2,777,633,000 2,913,534,000 2,892,213,000 2,759,854,000 2,736,579,000 2,829,389,000 2,815,185,000 2,780,564,000 2,775,542,000 2,933,483,000 2,908,996,000 2,791,347,000 2,740,310,000 2,886,637,000 2,675,675,000 2,620,279,000 914,954,000 2,754,154,000 2,689,505,000 2,678,950,000 2,522,930,000 944,369,000 911,818,000  834,026,000   
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 23,673 in 2025 and 22,932 in 2024
       212,226,000                                                               
        ceded unearned premiums
       124,669,000    124,955,000    112,257,000    138,457,000    130,916,000    113,488,000    93,656,000    71,174,000    57,928,000    52,173,000    52,833,000    53,961,000    60,407,000               
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 11,107 in 2025 and 9,580 in 2024
       746,798,000                                                               
        property and equipment, at cost, net of accumulated depreciation of 84,459 in 2025 and 76,330 in 2024
       40,733,000                                                               
        income taxes - deferred
           7,793,000    15,872,000    40,269,000    83,509,000    80,235,000    56,727,000    24,238,000    53,768,000    64,494,000    63,993,000    82,285,000    57,801,000               
        liabilities and shareholders' equity
                                                                      
        income taxes - current
       29,724,000    749,000    3,757,000                                                       
        shareholders' equity
                                                                      
        treasury stock
       -407,081,000    -406,497,000    -406,538,000    -405,014,000    -402,641,000    -401,291,000    -400,979,000    -401,353,000    -401,639,000    -404,495,000    -403,646,000    -406,768,000                   
        total shareholders' equity
       1,778,196,000    1,521,967,000    1,413,514,000    1,177,341,000    1,229,361,000    1,135,978,000                                       832,250,000  774,422,000 784,264,000 
        total liabilities and shareholders' equity
       6,161,486,000    5,628,802,000    5,180,221,000    4,767,068,000    4,508,302,000    3,938,485,000                                       961,530,000  901,919,000  
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 23,452 at 9/30/25 and 22,932 at 12/31/24
        231,530,000                                                              
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 11,063 at 9/30/25 and 9,580 at 12/31/24
        769,611,000                                                              
        property and equipment, at cost, net of accumulated depreciation of 82,340 at 9/30/25 and 76,330 at 12/31/24
        41,094,000                                                              
        debt
        100,000,000 100,000,000 100,000,000  100,000,000 100,000,000 100,000,000 100,000,000 100,000,000                                                      
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 23,325 at 6/30/25 and 22,932 at 12/31/24
         252,931,000                                                             
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 10,174 at 6/30/25 and 9,580 at 12/31/24
         761,719,000                                                             
        property and equipment, at cost, net of accumulated depreciation of 80,332 at 6/30/25 and 76,330 at 12/31/24
         41,722,000                                                             
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 23,085 at 3/31/25 and 22,932 at 12/31/24
          242,655,000                                                            
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 10,341 at 3/31/25 and 9,580 at 12/31/24
          752,829,000                                                            
        property and equipment, at cost, net of accumulated depreciation of 78,322 at 3/31/25 and 76,330 at 12/31/24
          42,328,000                                                            
        ​
           1,376,000      685,000 685,000 684,000 683,000         679,000 679,000 678,000 678,000 677,000                                     
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 22,932 in 2024 and 21,438 in 2023
           230,534,000                                                           
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 9,580 in 2024 and 10,608 in 2023
           755,425,000                                                           
        property and equipment, at cost, net of accumulated depreciation of 76,330 in 2024 and 74,279 in 2023
           43,172,000                                                           
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 22,049 at 9/30/24 and 21,438 at 12/31/23
            241,311,000                                                          
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 10,055 at 9/30/24 and 10,608 at 12/31/23
            759,540,000                                                          
        property and equipment, at cost, net of accumulated depreciation of 74,821 at 9/30/24 and 74,279 at 12/31/23
            44,644,000                                                          
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 21,791 at 6/30/24 and 21,438 at 12/31/23
             294,774,000                                                         
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 11,025 at 6/30/24 and 10,608 at 12/31/23
             782,288,000                                                         
        property and equipment, at cost, net of accumulated depreciation of 74,768 at 6/30/24 and 74,279 at 12/31/23
             46,574,000                                                         
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 21,699 at 3/31/24 and 21,438 at 12/31/23
              230,537,000                                                        
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 11,085 at 3/31/24 and 10,608 at 12/31/23
              814,676,000                                                        
        property and equipment, at cost, net of accumulated depreciation of 75,558 at 3/31/24 and 74,279 at 12/31/23
              46,536,000                                                        
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 21,438 in 2023 and 18,696 in 2022
               221,206,000                                                       
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 10,608 in 2023 and 11,250 in 2022
               757,349,000                                                       
        property and equipment, at cost, net of accumulated depreciation of 74,279 in 2023 and 68,633 in 2022
               46,715,000                                                       
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 19,415 at 9/30/23 and 18,696 at 12/31/22
                225,821,000                                                      
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 11,131 at 9/30/23 and 11,250 at 12/31/22
                820,954,000                                                      
        property and equipment, at cost, net of accumulated depreciation of 74,416 at 9/30/23 and 68,633 at 12/31/22
                48,596,000                                                      
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 18,768 at 6/30/23 and 18,696 at 12/31/22
                 229,471,000                                                     
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 10,251 at 6/30/23 and 11,250 at 12/31/22
                 720,858,000                                                     
        property and equipment, at cost, net of accumulated depreciation of 72,404 at 6/30/23 and 68,633 at 12/31/22
                 48,358,000                                                     
        current portion of long-term debt
                 199,956,000 199,910,000 199,863,000 149,816,000                                                  
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 18,723 at 3/31/23 and 18,696 at 12/31/22
                  206,445,000                                                    
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 10,922 at 3/31/23 and 11,250 at 12/31/22
                  699,915,000                                                    
        property and equipment, at cost, net of accumulated depreciation of 70,477 at 3/31/23 and 68,633 at 12/31/22
                  48,949,000                                                    
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 18,696 in 2022 and 18,067 in 2021
                   189,501,000                                                   
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 11,250 in 2022 and 11,188 in 2021
                   740,089,000                                                   
        property and equipment, at cost, net of accumulated depreciation of 68,633 in 2022 and 75,236 in 2021
                   49,573,000                                                   
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 18,478 at 9/30/22 and 18,067 at 12/31/21
                    201,781,000                                                  
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 11,400 at 9/30/22 and 11,188 at 12/31/21
                    770,858,000                                                  
        property and equipment, at cost, net of accumulated depreciation of 67,911 at 9/30/22 and 75,236 at 12/31/21
                    50,385,000                                                  
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 18,193 at 6/30/22 and 18,067 at 12/31/21
                     191,391,000                                                 
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 10,949 at 6/30/22 and 11,188 at 12/31/21
                     666,730,000                                                 
        property and equipment, at cost, net of accumulated depreciation of 71,680 at 6/30/22 and 75,236 at 12/31/21
                     50,955,000                                                 
        bonds payable, long-term debt
                     199,769,000 199,723,000  149,629,000 149,582,000 149,536,000 149,489,000 149,442,000 149,395,000 149,349,000 149,302,000 149,255,000 149,208,000 149,162,000 149,115,000 149,068,000 149,022,000 148,975,000 148,928,000 148,881,000 148,835,000 148,788,000 148,741,000 148,694,000 148,648,000 148,601,000 149,668,000 149,658,000 149,647,000 149,636,000 149,625,000 149,615,000 149,604,000 149,593,000    100,000,000 100,000,000 100,000,000 100,000,000 100,000,000 100,000,000 100,000,000 100,000,000 100,000,000 100,000,000 100,000,000 100,000,000 
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 18,381 at 3/31/22 and 18,067 at 12/31/21
                      170,501,000                                                
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 10,983 at 3/31/22 and 11,188 at 12/31/21
                      631,445,000                                                
        property and equipment, at cost, net of accumulated depreciation of 77,131 at 3/31/22 and 75,236 at 12/31/21
                      52,124,000                                                
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 18,067 in 2021 and 17,658 in 2020
                       167,279,000                                               
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 11,188 in 2021 and 8,634 in 2020
                       608,086,000                                               
        property and equipment, at cost, net of accumulated depreciation of 75,236 in 2021 and 68,682 in 2020
                       52,161,000                                               
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 18,860 at 9/30/21 and 17,658 at 12/31/20
                        177,162,000                                              
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 10,067 at 9/30/21 and 8,634 at 12/31/20
                        602,154,000                                              
        property and equipment, at cost, net of accumulated depreciation of 73,746 at 9/30/21 and 68,682 at 12/31/20
                        50,860,000                                              
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 18,410 at 6/30/21 and 17,658 at 12/31/20
                         177,237,000                                             
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 9,220 at 6/30/21 and 8,634 at 12/31/20
                         545,085,000                                             
        property and equipment, at cost, net of accumulated depreciation of 71,928 at 6/30/21 and 68,682 at 12/31/20
                         50,925,000                                             
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 18,172 at 3/31/21 and 17,658 at 12/31/20
                          149,736,000                                            
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 8,953 at 3/31/21 and 8,634 at 12/31/20
                          454,921,000                                            
        property and equipment, at cost, net of accumulated depreciation of 70,089 at 3/31/21 and 68,682 at 12/31/20
                          50,470,000                                            
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 17,658 in 2020 and 16,682 in 2019
                           174,628,000                                           
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 8,634 in 2020 and 9,402 in 2019
                           443,729,000                                           
        property and equipment, at cost, net of accumulated depreciation of 68,682 in 2020 and 62,703 in 2019
                           51,406,000                                           
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 17,246 at 9/30/20 and 16,682 at 12/31/19
                            159,427,000                                          
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 8,097 at 9/30/20 and 9,402 at 12/31/19
                            399,960,000                                          
        property and equipment, at cost, net of accumulated depreciation of 67,555 at 9/30/20 and 62,703 at 12/31/19
                            52,113,000                                          
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 17,139 at 6/30/20 and 16,682 at 12/31/19
                             154,941,000                                         
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 8,035 at 6/30/20 and 9,402 at 12/31/19
                             364,756,000                                         
        property and equipment, at cost, net of accumulated depreciation of 65,762 at 6/30/20 and 62,703 at 12/31/19
                             52,350,000                                         
        less: treasury shares at cost
                                                                      
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 16,948 at 3/31/20 and 16,682 at 12/31/19
                              154,084,000                                        
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 8,539 at 3/31/20 and 9,402 at 12/31/19
                              366,441,000                                        
        property and equipment, at cost, net of accumulated depreciation of 64,322 at 3/31/20 and 62,703 at 12/31/19
                              52,741,000                                        
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 16,682 in 2019 and 16,967 in 2018
                               160,369,000                                       
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 9,402 in 2019 and 9,793 in 2018
                               384,517,000                                       
        property and equipment, at cost, net of accumulated depreciation of 62,703 in 2019 and 54,275 in 2018
                               53,121,000                                       
        liabilities:
                                                                      
        shareholders’ equity:
                                                                      
        accumulated other comprehensive earnings, net of tax
                               52,473,000    -14,572,000    157,919,000    122,610,000    123,774,000    171,383,000    136,027,000    143,170,000     117,325,000 95,992,000 77,411,000 15,130,000 95,701,000  
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 16,860 at 9/30/19 and 16,967 at 12/31/18
                                157,111,000                                      
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 9,764 at 9/30/19 and 9,793 at 12/31/18
                                382,030,000                                      
        property and equipment, at cost, net of accumulated depreciation of 60,299 at 9/30/19 and 54,275 at 12/31/18
                                52,626,000                                      
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 16,829 at 6/30/19 and 16,967 at 12/31/18
                                 158,559,000                                     
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 9,792 at 6/30/19 and 9,793 at 12/31/18
                                 362,310,000                                     
        property and equipment, at cost, net of accumulated depreciation of 58,330 at 6/30/19 and 54,275 at 12/31/18
                                 53,580,000                                     
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 17,055 at 3/31/19 and 16,967 at 12/31/18
                                  139,487,000                                    
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 9,808 at 3/31/19 and 9,793 at 12/31/18
                                  364,374,000                                    
        property and equipment, at cost, net of accumulated depreciation of 56,322 at 3/31/19 and 54,275 at 12/31/18
                                  54,121,000                                    
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 16,967 in 2018 and 16,935 in 2017
                                   152,576,000                                   
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 9,793 in 2018 and 10,014 in 2017
                                   364,999,000                                   
        property and equipment, at cost, net of accumulated depreciation of 54,275 in 2018 and 47,676 in 2017
                                   54,692,000                                   
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 17,076 at 9/30/18 and 16,935 at 12/31/17
                                    138,480,000                                  
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 9,827 at 9/30/18 and 10,014 at 12/31/17
                                    320,027,000                                  
        property and equipment, at cost, net of accumulated depreciation of 52,418 at 9/30/18 and 47,676 at 12/31/17
                                    55,469,000                                  
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 16,933 at 6/30/18 and 16,935 at 12/31/17
                                     143,442,000                                 
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 10,005 at 6/30/18 and 10,014 at 12/31/17
                                     315,117,000                                 
        property and equipment, at cost, net of accumulated depreciation of 51,026 at 6/30/18 and 47,676 at 12/31/17
                                     56,019,000                                 
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 16,984 at 3/31/18 and 16,935 at 12/31/17
                                      132,682,000                                
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 9,945 at 3/31/18 and 10,014 at 12/31/17
                                      308,703,000                                
        property and equipment, at cost, net of accumulated depreciation of 49,350 at 3/31/18 and 47,676 at 12/31/17
                                      56,153,000                                
        equity securities available-for-sale, at fair value
                                       400,492,000 393,213,000 387,802,000 383,929,000 369,219,000 382,282,000 398,825,000 389,551,000 375,424,000    410,642,000    418,654,000               
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 16,935 in 2017 and 15,981 in 2016
                                       134,351,000                               
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 10,014 in 2017 and 10,699 in 2016
                                       301,991,000                               
        property and equipment, at cost, net of accumulated depreciation of 47,676 in 2017 and 41,999 in 2016
                                       55,849,000                               
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 16,543 at 9/30/17 and 15,981 at 12/31/16
                                        127,388,000                              
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 10,066 at 9/30/17 and 10,699 at 12/31/16
                                        291,074,000                              
        property and equipment, at cost, net of accumulated depreciation of 45,927 at 9/30/17 and 41,999 at 12/31/16
                                        55,770,000                              
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 16,075 at 6/30/17 and 15,981 at 12/31/16
                                         133,171,000                             
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 10,467 at 6/30/17 and 10,699 at 12/31/16
                                         280,568,000                             
        property and equipment, at cost, net of accumulated depreciation of 44,999 at 6/30/17 and 41,999 at 12/31/16
                                         56,547,000                             
        investments
                                                                      
        fixed income
                                                                      
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 16,222 at 3/31/17 and 15,981 at 12/31/16
                                          121,863,000                            
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 10,426 at 3/31/17 and 10,699 at 12/31/16
                                          271,346,000                            
        property and equipment, at cost, net of accumulated depreciation of 43,493 at 3/31/17 and 41,999 at 12/31/16
                                          56,173,000                            
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 15,981 in 2016 and 14,898 in 2015
                                           126,387,000                           
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 10,699 in 2016 and 11,885 in 2015
                                           288,224,000                           
        property and equipment, at cost, net of accumulated depreciation of 41,999 in 2016 and 38,447 in 2015
                                           54,606,000                           
        paid in capital
                                           229,779,000    221,345,000    213,737,000    208,705,000    235,262,000     227,788,000 215,066,000 207,386,000 196,989,000 192,446,000  
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 15,739 at 9/30/16 and 14,898 at 12/31/15
                                            136,214,000                          
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 10,956 at 9/30/16 and 11,885 at 12/31/15
                                            292,943,000                          
        property and equipment, at cost, net of accumulated depreciation of 43,011 at 9/30/16 and 38,447 at 12/31/15
                                            53,643,000                          
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 15,609 at 6/30/16 and 14,898 at 12/31/15
                                             148,894,000                         
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 11,096 at 6/30/16 and 11,885 at 12/31/15
                                             289,856,000                         
        property and equipment, at cost, net of accumulated depreciation of 41,054 at 6/30/16 and 38,447 at 12/31/15
                                             52,605,000                         
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 15,168 at 3/31/16 and 14,898 at 12/31/15
                                              115,183,000                        
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 11,497 at 3/31/16 and 11,885 at 12/31/15
                                              297,240,000                        
        property and equipment, at cost, net of accumulated depreciation of 39,910 at 3/31/16 and 38,447 at 12/31/15
                                              49,658,000                        
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 14,898 in 2015 and 14,245 in 2014
                                               143,662,000                       
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 11,885 in 2015 and 13,049 in 2014
                                               297,844,000                       
        property and equipment, at cost, net of accumulated depreciation of 38,447 in 2015 and 34,365 in 2014
                                               47,102,000                       
        short-term investments, at cost
                                                58,983,000 10,169,000 16,008,000  10,063,000 18,489,000 37,030,000  22,994,000 10,816,000 3,465,000  82,202,000 65,876,000 58,451,000 111,872,000      103,736,000 
        premiums and reinsurance balances receivable
                                                170,942,000 174,584,000 145,948,000  175,293,000 203,499,000 166,165,000  157,213,000 159,297,000 117,599,000  158,871,000 166,810,000 132,352,000 101,771,000      123,308,000 
        reinsurance balances recoverable on unpaid losses
                                                317,737,000 328,030,000 336,747,000  353,228,000 339,104,000 353,674,000  360,194,000 339,132,000 338,553,000  336,612,000 321,688,000 324,952,000 348,082,000      517,310,000 
        property and equipment
                                                45,038,000 43,407,000 42,458,000  42,400,000 42,935,000 42,107,000  36,007,000 34,491,000 31,464,000  25,218,000 20,710,000 19,168,000 18,689,000      19,647,000 
        held-to-maturity, at amortized cost
                                                    650,000 650,000 651,000 651,000 651,000 651,000 5,736,000  11,724,000 91,623,000 161,756,000 299,253,000      95,147,000 
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 14,245 in 2014 and 13,328 in 2013
                                                   154,573,000                   
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 13,049 in 2014 and 14,239 in 2013
                                                   335,106,000                   
        property and equipment, at cost, net of accumulated depreciation of 34,365 in 2014 and 41,491 in 2013
                                                   42,549,000                   
        trading, at fair value
                                                          6,000  7,000 8,000 8,000 10,000      14,831,000 
        premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of 13,328 in 2013 and 13,470 in 2012
                                                       152,509,000               
        reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of 14,239 in 2013 and 14,834 in 2012
                                                       354,924,000               
        property and equipment, at cost, net of accumulated depreciation of 41,491 in 2013 and 45,603 in 2012
                                                       40,261,000               
        investment in unconsolidated investee
                                                       49,793,000 62,506,000 60,004,000 55,533,000  58,242,000          
        debt, notes payable due 2014
                                                        100,000,000              
        debt, notes payable due 2023
                                                       149,582,000 150,000,000              
        bond issuance - proceeds receivable
                                                        148,596,000              
        debt, notes payable
                                                         100,000,000             
        accounts receivable, affiliates
                                                           3,699,000           
        investments in subsidiaries, at equity value
                                                           822,856,000     846,851,000 831,560,000     
        investments in unconsolidated investee, at equity value
                                                           52,128,000     49,968,000 43,358,000     
        property and equipment, at cost, net of accumulated depreciation of 240 in 2012 and 2,616 in 2011
                                                           709,000           
        income taxes receivable - current
                                                                2,968,000      
        deferred debt costs
                                                           112,000     219,000 326,000 433,000 540,000 647,000  
        accounts payable, affiliates
                                                                6,684,000 3,658,000 4,767,000 2,964,000 7,235,000  
        income taxes payable—current
                                                           207,000      118,000  1,244,000 82,000  
        income taxes payable—deferred
                                                           15,183,000     15,535,000 13,167,000  12,204,000 11,255,000  
        interest payable, long-term debt
                                                           2,727,000     2,727,000 2,727,000 2,727,000 2,727,000 2,727,000  
        treasury shares at cost
                                                                      
        total investments
                                                               1,830,420,000      1,896,016,000 
        goodwill
                                                               26,214,000       
        property and equipment, at cost, net of accumulated depreciation of 2,616 in 2011 and 2,381 in 2010
                                                                4,771,000      
        property and equipment, at cost, net of accumulated depreciation of 2,381 in 2010 and 2,110 in 2009
                                                                 4,995,000     
        dividends payable
                                                                  6,520,000 6,109,000 5,561,000  
        investments in subsidiaries/investees, at equity value
                                                                  923,237,000 795,211,000 863,744,000  
        property and equipment, at cost, net of accumulated depreciation of 2,110 in 2009 and 1,839 in 2008
                                                                  5,260,000    
        income taxes payable--current
                                                                  521,000    
        income taxes payable--deferred
                                                                  14,085,000    
        shareholders' equity:
                                                                      
        property and equipment, at cost, net of accumulated depreciation of 1,839 in 2008 and 1,570 in 2007
                                                                   5,531,000   
        property and equipment, at cost, net of accumulated depreciation of 1,570 in 2007 and 1,303 in 2006
                                                                    5,772,000  
        fixed maturities
                                                                      
        preferred stock, at fair value
                                                                     28,020,000 
        goodwill and indefinite-lived intangibles
                                                                     26,214,000 
        notes payable, short-term debt
                                                                     26,961,000 
        total liabilities and shareholder's equity
                                                                     2,807,933,000 
        net cash from operating activities
                                                                     89,047,000 
        cash flows from investing activities
                                                                      
        investments purchased
                                                                      
        investments sold
                                                                     94,842,000 
        investments called or matured
                                                                     61,650,000 
        net change in short term investments
                                                                      
        changes in notes receivable
                                                                     6,000,000 
        net property and equipment purchased
                                                                      
        net cash from investing activities
                                                                     -76,107,000 
        cash flows from financing activities
                                                                      
        cash dividends paid
                                                                     -9,647,000 
        payment on short-term debt
                                                                      
        proceeds from issuance of short-term debt
                                                                     26,961,000 
        stock option plan share issuance
                                                                     2,256,000 
        excess tax benefit from exercise of stock options
                                                                     158,000 
        treasury shares purchased
                                                                      
        net cash from financing activities
                                                                     -12,940,000 
        net increase in cash
                                                                      
        cash at the beginning of the year
                                                                      
        cash at june 30
                                                                      
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2025-12-31 2024-12-31 2023-12-31 2022-12-31 2021-12-31 2020-12-31 
              
          cash flows from operating activities:
              
          net earnings
              
          adjustments to reconcile net earnings to net cash from operating activities:
              
          net realized gains
              
          net unrealized gains on equity securities
              
          depreciation
              
          deferred income tax expense
              
          other items
              
          change in:
              
          accrued investment income
              
          premiums and reinsurance balances receivable
              
          reinsurance balances payable
              
          funds held
              
          ceded unearned premiums
              
          reinsurance balances recoverable on unpaid losses and settlement expenses
              
          deferred policy acquisition costs
              
          accrued expenses
              
          unpaid losses and settlement expenses
              
          unearned premiums
              
          current income taxes payable
              
          changes in investment in unconsolidated investees:
              
          undistributed earnings
              
          dividends received
              
          net cash from operating activities
        156,768,000 128,080,000 122,065,000 -32,438,000 104,464,000 100,015,000 
          capital expenditures
          free cash flows
        156,768,000 128,080,000 122,065,000 -32,438,000 104,464,000 100,015,000 
          cash flows from investing activities:
              
          purchase of:
              
          fixed income securities, available-for-sale
        -295,049,000 -220,635,000 -101,878,000 -1,521,465,000 -145,901,000 -149,776,000 
          equity securities
        -33,776,000 -21,354,000 -15,081,000 -2,517,000 -23,503,000 -15,220,000 
          property and equipment
        -1,787,000 -523,000 -462,000 -1,457,000 -3,305,000 -799,000 
          other
        -268,000 -6,600,000 -2,251,000 2,236,000 510,000 2,244,000 
          proceeds from sale of:
              
          equity method investee
              
          proceeds from call or maturity of:
              
          fixed income, available-for-sale
              
          net sale of short-term investments
              
          net cash from investing activities
        40,390,000 53,218,000 -330,000 -335,657,000 -54,561,000 -53,280,000 
          cash flows from financing activities:
              
          proceeds from issuance of debt
          50,000,000    
          repayment of debt
              
          proceeds from stock option exercises
        202,000 -5,368,000 -153,000 -2,663,000 1,159,000 868,000 
          cash dividends paid
        -198,416,000 -196,774,000 -103,603,000 -329,935,000 -101,876,000 -55,975,000 
          net cash from financing activities
        -198,214,000 -202,142,000 -103,756,000 -332,598,000 -50,717,000 -55,107,000 
          net increase in cash
        -1,056,000 -20,844,000 17,979,000 -700,693,000 -814,000 -8,372,000 
          cash at beginning of year
              
          cash at end of year
              
          cash flows from investing activities
              
          net proceeds from sale (purchase) of short-term investments
              
          cash flows from financing activities
              
          cash at the beginning of the period
              
          cash at september 30,
              
          1.
              
          cash at june 30,
              
          cash at march 31,
              
          net unrealized (gains) losses on equity securities
              
          ​
              
          net sale (purchase) of short-term investments
              
          equity method investments
              
          payment of debt
              
          net unrealized losses on equity securities
              
          net purchase of short-term investments
              
          proceeds from issuance of long-term debt
              
          proceeds from (payments related to) stock option exercises
              
          cash at june 30
              
          goodwill
              
          surety
              
          casualty
              
          total goodwill
              
          intangibles
              
          indefinite-lived intangibles - state insurance licenses
              
          total goodwill and intangibles
              
          cash at march 31
              
          investment in equity method investee
              
          net proceeds from sale of short-term investments
              
          cash at september 30
              
          definite-lived intangibles, net of accumulated amortization of 4,035 at 9/30/21 and 3,878 at 12/31/20
              
          total intangibles
              
          definite-lived intangibles, net of accumulated amortization of 4,015 at 6/30/21 and 3,878 at 12/31/20
              
          definite-lived intangibles, net of accumulated amortization of 3,980 at 3/31/21 and 3,878 at 12/31/20
              
          definite-lived intangibles, net of accumulated amortization of 3,776 at 9/30/20 and 3,470 at 12/31/19
              
          goodwill and intangible assets
              
          energy surety
              
          miscellaneous and contract surety
              
          small commercial
              
          definite-lived intangibles, net of accumulated amortization of 3,674 at 6/30/20 and 3,470 at 12/31/19
              
          net decrease in cash
              
          definite-lived intangibles, net of accumulated amortization of 3,572 at 3/31/20 and 3,470 at 12/31/19
              
          operating results
              
          gross premiums written
              
          consolidated revenue
              
          comprehensive earnings
              
          financial condition
              
          total investments and cash
              
          total assets
              
          total debt
              
          total shareholders’ equity
              
          statutory surplus
              
          share information
              
          net earnings per share :
              
          basic
              
          diluted
              
          comprehensive earnings per share:
              
          cash dividends declared per share:
              
          regular
              
          special
              
          book value per share
              
          closing stock price
              
          weighted-average shares outstanding:
              
          common shares outstanding
              
          other non-gaap financial information
              
          net premiums written to statutory surplus
              
          combined ratio
              
          statutory combined ratio
              
          ratios and surplus information are presented on a statutory basis. as discussed in item 7, management’s discussion and analysis of financial condition and results of operations, statutory accounting principles differ from gaap and are generally based on a solvency concept. further discussion is included in note 9 to the consolidated financial statements within item 8, financial statements and supplementary data. reporting of statutory surplus is a required disclosure under gaap.
              
          see page 34 for information regarding non-gaap financial measures.
              
          investments purchased
              
          investments sold
              
          investments called or matured
              
          net change in short-term investments
              
          net property and equipment purchased
              
          state insurance licenses
              
          definite-lived intangibles, net of accumulated amortization of 3,368 at 9/30/19 and 3,062 at 12/31/18
              
          definite-lived intangibles, net of accumulated amortization of 3,266 at 6/30/19 and 3,062 at 12/31/18
              
          stock plan share issuance
              
          definite-lived intangibles, net of accumulated amortization of 3,164 at 3/31/19 and 3,062 at 12/31/18
              
          ceded unearned premium
              
          reinsurance balances recoverable on unpaid losses
              
          income taxes:
              
          current
              
          deferred
              
          stock option excess tax benefit
              
          short-term investments
              
          acquisition of agency
              
          subsidiary or agency
              
          e.
              
          a.
              
          sale (acquisition) of agency
              
          excess tax benefit from exercise of stock options
              
          adjustments to reconcile net earnings to net cash from operating activities
              
          income taxes
              
          net proceeds from trading portfolio activity
              
          equity securities, available-for-sale
              
          fixed income, held-to-maturity
              
          subsidiary
              
          proceeds from issuance of senior notes
              
          payment on senior notes
              
          debt issue costs paid
              
          basic eps
              
          income available to common shareholders
              
          effect of dilutive securities
              
          stock options
              
          diluted eps
              
          net realized investment gains
              
          acquisition of rockbridge underwriting agency
              
          (in thousands, except
              
          per share data)