7Baggers

Medpace Holdings, Inc
(NASDAQ:MEDP) 

MEDP stock logo

Medpace Holdings, Inc. provides clinical research-based drug and medical device development services in North America, Europe, and Asia. The company offers a suite of services supporting the clinical development process from Phase I to Phase IV in various therapeutic areas. It also provides clinical...

Founded: 1992
Full Time Employees: 3,400
Sector: Healthcare
Industry: Diagnostics & Research
Pharmaceuticals
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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 2019-12-31 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 2016-04-01 
                                            
      revenue
    		706,604,000 708,450,000 659,903,000 603,311,000 558,570,000 536,589,000 533,317,000 528,104,000 511,044,000 498,401,000 492,499,000 460,868,000  394,098,000 383,744,000 351,207,000 330,947,000 308,552,000 295,567,000 278,293,000 259,965,000 259,678,000 230,373,000 204,995,000 230,879,000 229,886,000 216,238,000 214,104,000 200,741,000 192,115,000 179,253,000 170,144,000 163,077,000        
      yoy
    		26.50% 32.03% 23.74% 14.24% 9.30% 7.66% 8.29% 14.59%  26.47% 28.34% 31.22%  27.72% 29.83% 26.20% 27.30% 18.82% 28.30% 35.76% 12.60% 12.96% 6.54% -4.25% 15.01% 19.66% 20.63% 25.84% 23.10%            
      qoq
    		-0.26% 7.36% 9.38% 8.01% 4.10% 0.61% 0.99% 3.34% 2.54% 1.20% 6.86%   2.70% 9.26% 6.12% 7.26% 4.39% 6.21% 7.05% 0.11% 12.72% 12.38% -11.21% 0.43% 6.31% 1.00% 6.66% 4.49% 7.18% 5.35% 4.33%         
      operating expenses:
    		                                        
      direct service costs, excluding depreciation and amortization
    		198,274,000 182,151,000 186,335,000 185,826,000 177,816,000 167,522,000 171,540,000 171,541,000 171,492,000 164,291,000 164,364,000 158,526,000 151,068,000 140,687,000 136,648,000 132,118,000 125,434,000 118,930,000 112,540,000 108,233,000 101,387,000 91,429,000 87,577,000 86,625,000 88,795,000 85,484,000 81,086,000 79,327,000 75,109,000 67,945,000 62,520,000 61,478,000 60,341,000        
      reimbursed out-of-pocket expenses
    		312,004,000 320,983,000 276,629,000 237,472,000 202,404,000 190,750,000 192,769,000 202,725,000 184,410,000 197,304,000 194,942,000 178,025,000 152,817,000 137,680,000 128,062,000 120,093,000 106,836,000 101,638,000 95,934,000 95,409,000 80,151,000 85,397,000 68,637,000 61,733,000 77,006,000 81,703,000 70,984,000 70,985,000 70,594,000 63,188,000 61,476,000 55,198,000 56,913,000 13,234,000 11,962,000 11,664,000 12,830,000 12,867,000 12,987,000  
      total direct costs
    		510,278,000 503,134,000 462,964,000 423,298,000 380,220,000 358,272,000 364,309,000 374,266,000 355,902,000 361,595,000 359,306,000 336,551,000 303,885,000 278,367,000 264,710,000 252,211,000 232,270,000 220,568,000 208,474,000 203,642,000 181,538,000 176,826,000 156,214,000 148,358,000 165,801,000 167,187,000 152,070,000 150,312,000 145,703,000 131,133,000 123,996,000 116,676,000 117,254,000        
      selling, general and administrative
    		47,917,000 44,916,000 48,082,000 46,664,000 57,897,000 45,433,000 49,217,000 41,453,000 44,081,000 42,514,000 41,407,000 39,404,000 38,027,000 33,401,000 35,418,000 33,215,000 29,366,000 27,664,000 28,046,000 26,973,000 25,738,000 22,381,000 22,796,000 21,855,000 25,124,000 21,261,000 29,120,000 23,556,000 21,308,000 20,569,000 18,606,000 20,507,000 15,999,000 16,842,000 16,606,000 14,755,000 15,154,000 16,783,000 16,391,000  
      depreciation
    		6,751,000 6,894,000 6,813,000 6,777,000 6,694,000 7,145,000 7,158,000 6,874,000 6,631,000 6,422,000 6,329,000 5,970,000 5,408,000 5,061,000 4,951,000 4,707,000 4,270,000 4,186,000 4,056,000 3,951,000 3,812,000 3,534,000 2,991,000 2,674,000 2,453,000 2,325,000 2,062,000 1,982,000 1,991,000 2,357,000 2,343,000 2,226,000 2,314,000 2,106,000 2,237,000 2,101,000 2,130,000 1,961,000 1,915,000  
      amortization
    		155,000 237,000 236,000 237,000 236,000 361,000 360,000 361,000 361,000 550,000 549,000 550,000 550,000 838,000 838,000 838,000 838,000 1,279,000 1,278,000 1,279,000 1,278,000 1,949,000 1,950,000 1,980,000 1,997,000 2,995,000 2,995,000 2,995,000 5,844,000 7,390,000 7,390,000 7,390,000 7,391,000 9,494,000 9,496,000 9,462,000 9,448,000 12,668,000 12,668,000  
      total operating expenses
    		565,101,000 555,181,000 518,095,000 476,976,000 445,047,000 411,211,000 421,044,000 422,954,000 406,975,000 411,081,000 407,591,000 382,475,000 347,870,000 317,667,000 305,917,000 290,971,000 266,744,000 253,697,000 241,854,000 235,845,000 212,366,000 204,690,000 183,951,000 174,867,000 195,375,000 193,768,000 186,247,000 178,845,000 174,846,000 161,449,000 152,335,000 146,799,000 142,958,000 97,245,000 93,445,000 89,937,000 90,667,000 95,353,000 95,182,000  
      income from operations
    		141,503,000 153,269,000 141,808,000 126,335,000 113,523,000 125,378,000 112,273,000 105,150,000 104,069,000 87,320,000 84,908,000 78,393,000 86,204,000 76,431,000 77,827,000 60,236,000 64,203,000 54,855,000 53,713,000 42,448,000 47,599,000 54,988,000 46,422,000 30,128,000 35,504,000 36,118,000 29,991,000 35,259,000 25,895,000 30,666,000 26,918,000 23,345,000 20,119,000 15,437,000 17,198,000 16,279,000 15,944,000 12,890,000 12,617,000  
      yoy
    		24.65% 22.25% 26.31% 20.15% 9.08% 43.58% 32.23% 34.13% 20.72% 14.25% 9.10% 30.14% 34.27% 39.33% 44.89% 41.91% 34.88% -0.24% 15.71% 40.89% 34.07% 52.25% 54.79% -14.55% 37.11% 17.78% 11.42% 51.03% 28.71% 98.65% 56.52% 43.41% 26.19% 19.76% 36.31%      
      qoq
    		-7.68% 8.08% 12.25% 11.29% -9.46% 11.67% 6.77% 1.04% 19.18% 2.84% 8.31% -9.06% 12.79% -1.79% 29.20% -6.18% 17.04% 2.13% 26.54% -10.82% -13.44% 18.45% 54.08% -15.14% -1.70% 20.43% -14.94% 36.16% -15.56% 13.92% 15.31% 16.03% 30.33% -10.24% 5.65% 2.10% 23.69% 2.16%   
      operating margin %
    		20.03% 21.63% 21.49% 20.94% 20.32% 23.37% 21.05% 19.91% 20.36% 17.52% 17.24% 17.01% Infinity% 19.39% 20.28% 17.15% 19.40% 17.78% 18.17% 15.25% 18.31% 21.18% 20.15% 14.70% 15.38% 15.71% 13.87% 16.47% 12.90% 15.96% 15.02% 13.72% 12.34% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity%  
      other income, net:
    		                                        
      miscellaneous income
    		971,000 -158,000 -489,000 -2,875,000 -1,816,000 621,000 -1,025,000 -133,000 4,593,000 1,543,000 -1,602,000 -1,283,000 687,000 -1,959,000 5,649,000 2,311,000 1,067,000 1,089,000 1,064,000 265,000 924,000 -257,000 584,000 239,000 617,000 -289,000 -273,000 -19,000  253,000 482,000 478,000      896,000 -378,000  
      interest income
    		5,117,000 3,722,000 1,517,000 1,078,000 6,463,000 7,883,000 7,528,000 5,465,000 4,120,000    -861,000    54,000 -23,000 -41,000 -27,000 -14,000 -29,000 -16,000 -5,000 357,000                
      total other income
    		6,088,000 3,564,000 1,028,000 -1,797,000 4,647,000 8,504,000 6,503,000 5,332,000 8,713,000 3,387,000 -1,707,000 -2,649,000 -174,000 -2,786,000 4,065,000 1,763,000 1,121,000 1,066,000 1,023,000 238,000 910,000 -286,000 568,000 234,000 974,000                
      income before income taxes
    		147,591,000 156,833,000 142,836,000 124,538,000 118,170,000 133,882,000 118,776,000 110,482,000 112,782,000 90,707,000 83,201,000 75,744,000 86,030,000 73,645,000 81,892,000 61,999,000 65,324,000 55,921,000 54,736,000 42,686,000 48,509,000 54,702,000 46,990,000 30,362,000 36,478,000 36,217,000 29,465,000 34,492,000 24,658,000 29,320,000 25,459,000 21,515,000 17,657,000 13,674,000 15,147,000 14,346,000 13,778,000 226,000 7,583,000  
      income tax provision
    		23,721,000 21,700,000 31,701,000 34,278,000 3,575,000 16,864,000 22,350,000 22,131,000 10,191,000 12,409,000 12,651,000 14,676,000 13,136,000 4,975,000 15,865,000 12,639,000 4,013,000 5,887,000 6,162,000 2,752,000 5,203,000 3,836,000 5,530,000 6,258,000 7,524,000 6,404,000 5,488,000 7,037,000 5,460,000 6,559,000 6,154,000 4,947,000 3,106,000 2,383,000 5,316,000 4,793,000 5,331,000 247,000 2,547,000  
      net income
    		123,870,000 135,133,000 111,135,000 90,260,000 114,595,000 117,018,000 96,426,000 88,351,000 102,591,000 78,298,000 70,550,000 61,068,000 72,894,000 68,670,000 66,027,000 49,360,000 61,311,000 50,034,000 48,574,000 39,934,000 43,306,000 50,866,000 41,460,000 24,104,000 28,954,000 29,813,000 23,977,000 27,455,000 19,198,000 22,761,000 19,305,000 16,568,000 14,551,000 11,291,000 9,831,000 9,553,000 8,447,000 -21,000 5,036,000  
      yoy
    		8.09% 15.48% 15.25% 2.16% 11.70% 49.45% 36.68% 44.68% 40.74% 14.02% 6.85% 23.72% 18.89% 37.25% 35.93% 23.60% 41.58% -1.64% 17.16% 65.67% 49.57% 70.62% 72.92% -12.21% 50.82% 30.98% 24.20% 65.71% 31.94% 101.59% 96.37% 73.43% 72.26% -53866.67% 95.21%      
      qoq
    		-8.33% 21.59% 23.13% -21.24% -2.07% 21.36% 9.14% -13.88% 31.03% 10.98% 15.53% -16.22% 6.15% 4.00% 33.77% -19.49% 22.54% 3.01% 21.64% -7.79% -14.86% 22.69% 72.00% -16.75% -2.88% 24.34% -12.67% 43.01% -15.65% 17.90% 16.52% 13.86% 28.87% 14.85% 2.91% 13.09% -40323.81% -100.42%   
      net income margin %
    		17.53% 19.07% 16.84% 14.96% 20.52% 21.81% 18.08% 16.73% 20.07% 15.71% 14.32% 13.25% Infinity% 17.42% 17.21% 14.05% 18.53% 16.22% 16.43% 14.35% 16.66% 19.59% 18.00% 11.76% 12.54% 12.97% 11.09% 12.82% 9.56% 11.85% 10.77% 9.74% 8.92% Infinity% Infinity% Infinity% Infinity% -Infinity% Infinity%  
      net income per share
    		                                        
      basic
    		4.35 4.76 3.95 3.16 3.77 3.78 3.11 2.85 3.32 2.55 2.3 2 2.35 2.18 2.13 1.52 1.75 1.39 1.35 1.11 1.21 1.43 1.16 0.68 0.8 0.82 0.67 0.76 0.54 0.64 0.54 0.46 0.41 0.3 0.25 0.24 0.21 -0.01 0.14  
      diluted
    		4.28 4.64 3.86 3.1 3.67 3.67 3.01 2.75 3.2 2.46 2.22 1.93 2.27 2.1 2.05 1.46 1.69 1.32 1.29 1.06 1.14 1.34 1.09 0.64 0.76 0.79 0.63 0.73 0.51 0.61 0.52 0.45 0.4 0.29 0.25 0.23 0.2 -0.02 0.13  
      weighted-average common shares outstanding:
    		                                        
      basic
    		28,445 28,846 28,136 28,601 30,387 30,957 31,047 30,990 30,843 30,722 30,629 30,537 31,008 32,388 31,009 32,493 34,918 35,862 35,816 35,894 35,753 35,635 35,552 35,386 36,024 35,881 35,939 35,839 35,698 35,547 35,569 35,519 35,486 39,056 38,579 40,183 40,669 35,690 37,118  
      diluted
    		28,962 29,527 28,817 29,143 31,196 32,014 32,088 32,086 32,001 31,841 31,762 31,575 32,155 33,671 32,253 33,695 36,364 37,697 37,519 37,714 37,749 37,708 37,763 37,328 38,030 37,576 37,835 37,389 37,285 36,912 37,125 36,664 36,449 39,839 39,329 40,825 41,508 36,329 37,623  
      interest expense
    		         1,844,000 -105,000 -1,366,000  -519,500 -1,584,000 -548,000          388,000 -253,000 -748,000 -955,000 -1,599,000 -1,941,000 -2,308,000 -2,309,000 -2,051,000 -1,906,000 -1,808,000 -1,794,000 -2,834,000 -4,656,000  
      revenue, net (includes 15.8 million and 13.3 million with related parties for the three months ended march 31, 2023 and 2022, respectively.
    		            434,074,000                            
      other expense, net:
    		                                        
      total other expense
    		                         99,000 -526,000 -767,000 -1,237,000 -1,346,000 -1,459,000 -1,830,000 -2,462,000 -1,763,000 -2,051,000 -1,933,000 -2,166,000 -12,664,000 -5,034,000  
      miscellaneous expense
    		                            -282,000    -153,000 288,000 -145,000 -125,000 -372,000    
      revenue:
    		                                        
      service revenue
    		                                 99,448,000 98,681,000 94,552,000 93,781,000 95,376,000 94,812,000  
      reimbursed out-of-pocket revenue
    		                                 13,234,000 11,962,000 11,664,000 12,830,000 12,867,000 12,987,000  
      total revenue
    		                             192,115,000 179,253,000 170,144,000 163,077,000 112,682,000 110,643,000 106,216,000 106,611,000 108,243,000 107,799,000  
      direct costs, excluding depreciation and amortization
    		                                 55,569,000 53,144,000 51,955,000 51,105,000 51,074,000 51,221,000  
    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 
                                             
        assets
      		                                       
        current assets:
      		                                       
        cash and cash equivalents
      		652,681,000 497,049,000 285,351,000 46,330,000 441,436,000 669,436,000 656,900,000 510,894,000 407,010,000 245,449,000 95,207,000 39,138,000 46,922,000 28,265,000 31,007,000 42,551,000 82,843,000 461,304,000 398,387,000 339,009,000 332,877,000 277,766,000 219,227,000 160,903,000 133,999,000 131,920,000 79,290,000 20,098,000 30,127,000 23,275,000 22,244,000 22,230,000 22,245,000 26,485,000 24,168,000 29,055,000 29,316,000 37,099,000 14,636,000 
        accounts receivable and unbilled
      		394,581,000 402,078,000 373,034,000 377,921,000 298,217,000 296,443,000 311,466,000 301,108,000 279,166,000 298,400,000 292,773,000 275,058,000 257,746,000 253,404,000 249,086,000 225,695,000 224,759,000 186,432,000 186,378,000 161,489,000 159,997,000 160,962,000 134,087,000 127,286,000 136,374,000 155,662,000 140,189,000 149,860,000 129,624,000 133,449,000 108,285,000 115,398,000 110,654,000 83,079,000 74,708,000 76,664,000 82,283,000 79,767,000 81,922,000 
        prepaid expenses and other current assets
      		91,793,000 90,497,000 78,900,000 96,554,000 81,784,000 63,350,000 64,229,000 60,521,000 58,726,000 49,979,000 60,901,000 64,731,000 62,954,000 52,293,000 57,648,000 60,641,000 48,367,000 43,176,000 56,455,000 49,602,000 40,506,000 34,923,000 41,691,000 30,893,000 32,629,000 29,446,000 30,918,000 24,386,000 22,624,000 21,383,000 22,549,000 20,844,000 20,848,000 20,400,000 18,074,000 17,129,000 16,433,000 16,074,000 20,606,000 
        total current assets
      		1,139,055,000 989,624,000 737,285,000 520,805,000 821,437,000 1,029,229,000 1,032,595,000 872,523,000 744,902,000 593,828,000 448,881,000 378,927,000 367,622,000 333,962,000 337,741,000 328,887,000 355,969,000 690,912,000 641,220,000 550,100,000 533,380,000 473,651,000 395,005,000 319,082,000 303,002,000 317,028,000 250,397,000 194,344,000 182,375,000 178,114,000 153,085,000 158,479,000 153,754,000 129,971,000 117,029,000 123,123,000 128,325,000 133,248,000 120,527,000 
        property and equipment
      		136,548,000 131,055,000 133,175,000 135,481,000 128,332,000 123,615,000 124,058,000 122,394,000 118,600,000 120,589,000 114,764,000 114,817,000 113,755,000 109,849,000 104,719,000 103,538,000 98,529,000 93,153,000 87,703,000 86,195,000 84,504,000 85,017,000 71,472,000 65,954,000 50,015,000 47,292,000 43,715,000 39,749,000 37,639,000 52,255,000 52,030,000 52,360,000 51,079,000 48,739,000 45,903,000 45,244,000 44,976,000 43,805,000 41,342,000 
        operating lease right-of-use assets
      		126,812,000 117,815,000 123,586,000 129,504,000 129,859,000 128,649,000 130,547,000 134,001,000 138,803,000 144,801,000 144,147,000 139,863,000 143,309,000 139,068,000 139,071,000 135,389,000 141,638,000 129,558,000 125,428,000 110,730,000 112,266,000 113,809,000 109,533,000 113,566,000 58,667,000 52,152,000 52,479,000 51,809,000 53,627,000           
        goodwill
      		662,396,000 662,396,000 662,396,000 662,396,000 662,396,000 662,396,000 662,396,000 662,396,000 662,396,000 662,396,000 662,396,000 662,396,000 662,396,000 662,396,000 662,396,000 662,396,000 662,396,000 662,396,000 662,396,000 662,396,000 662,396,000 662,396,000 662,458,000 662,427,000 662,427,000 662,396,000 662,427,000 662,427,000 662,380,000 660,981,000 660,981,000 660,981,000 660,981,000 660,981,000 660,981,000 660,981,000 660,981,000 660,981,000 660,981,000 
        intangible assets
      		33,265,000 33,420,000 33,657,000 33,893,000 34,130,000 34,366,000 34,727,000 35,087,000 35,448,000 35,809,000 36,359,000 36,908,000 37,458,000 38,008,000 38,846,000 39,684,000 40,522,000 41,360,000 42,639,000 43,917,000 45,196,000 46,474,000 48,423,000 50,373,000 52,353,000 54,350,000 57,345,000 60,340,000 63,335,000 69,179,000 76,569,000 83,959,000 91,349,000 98,740,000 108,234,000 117,676,000 126,623,000 136,071,000 148,739,000 
        deferred income taxes
      		3,220,000 19,223,000 37,189,000 65,792,000 99,692,000 100,357,000 76,683,000 75,196,000 75,231,000 74,435,000 59,343,000 51,766,000 49,157,000 48,083,000 27,023,000 26,441,000 25,809,000 25,134,000 1,272,000 540,000 556,000 536,000 477,000 469,000 490,000 376,000 293,000 313,000 330,000 713,000 446,000 5,972,000 9,970,000 6,343,000 11,115,000 11,536,000 154,000 97,000 135,000 
        other assets
      		28,317,000 21,939,000 25,724,000 23,802,000 21,523,000 22,254,000 23,055,000 18,451,000 20,409,000 24,970,000 20,831,000 22,261,000 22,026,000 21,129,000 18,629,000 19,118,000 19,483,000 17,422,000 16,485,000 15,830,000 13,062,000 8,794,000 8,774,000 10,263,000 10,680,000 9,477,000 5,673,000 7,879,000 6,831,000 6,691,000 6,732,000 6,430,000 5,891,000 5,943,000 5,614,000 5,086,000 5,034,000 4,903,000 4,763,000 
        total assets
      		2,129,613,000 1,975,472,000 1,753,012,000 1,571,673,000 1,897,369,000 2,100,866,000 2,084,061,000 1,920,048,000 1,795,789,000 1,656,828,000 1,486,721,000 1,406,938,000 1,395,723,000 1,352,495,000 1,328,425,000 1,315,453,000 1,344,346,000 1,659,935,000 1,577,143,000 1,469,708,000 1,451,360,000 1,390,677,000 1,296,142,000 1,222,134,000 1,137,634,000 1,143,071,000 1,072,329,000 1,016,861,000 1,006,517,000 967,933,000 949,843,000 968,181,000 973,024,000 950,717,000 948,876,000 963,646,000 966,093,000 979,105,000 976,487,000 
        liabilities and shareholders’ equity
      		                                       
        current liabilities:
      		                                       
        accounts payable
      		34,429,000 28,142,000 26,523,000 43,275,000 61,318,000 32,528,000 26,201,000 27,388,000 24,402,000 31,869,000 29,023,000 33,608,000 37,110,000 33,069,000 28,245,000 28,800,000 25,434,000 25,678,000 25,052,000 23,326,000 21,348,000 26,552,000 15,878,000 14,879,000 16,985,000 22,404,000 20,684,000 22,691,000 13,626,000 16,737,000 13,602,000 16,859,000 17,924,000 16,674,000 9,972,000 7,195,000 8,345,000 10,911,000 9,337,000 
        accrued expenses
      		406,059,000 408,382,000 368,746,000 323,505,000 286,099,000 307,807,000 306,868,000 292,659,000 270,926,000 292,961,000 264,785,000 231,925,000 201,201,000 210,125,000 204,117,000 173,192,000 155,018,000 159,286,000 158,211,000 145,847,000 123,608,000 134,367,000 116,996,000 102,950,000 107,005,000 109,252,000 102,535,000 93,604,000 82,247,000 87,493,000 80,328,000 72,925,000 63,576,000 23,673,000 20,085,000 16,392,000 14,083,000 24,417,000 21,415,000 
        advanced billings
      		856,344,000 854,390,000 834,328,000 808,783,000 718,716,000 710,585,000 670,939,000 638,417,000 616,697,000 559,860,000 518,755,000 490,557,000 466,040,000 462,729,000 417,927,000 401,368,000 367,221,000 344,641,000 303,848,000 282,217,000 277,807,000 255,664,000 202,612,000 195,351,000 189,562,000 192,359,000 169,529,000 165,447,000 150,243,000 147,935,000 133,403,000 120,945,000 126,387,000 73,756,000 68,341,000 65,577,000 60,474,000 65,668,000 67,662,000 
        other current liabilities
      		48,182,000 52,834,000 54,317,000 44,880,000 56,178,000 53,633,000 37,346,000 34,624,000 44,620,000 40,441,000 35,955,000 41,347,000 62,538,000 47,547,000 30,879,000 25,899,000 31,755,000 27,612,000 30,071,000 21,217,000 24,543,000 23,527,000 22,910,000 24,804,000 25,099,000 18,987,000 21,644,000 14,331,000 18,425,000 4,861,000 4,794,000 5,933,000 8,105,000 4,697,000 5,250,000 3,130,000 5,264,000 3,284,000 4,763,000 
        total current liabilities
      		1,345,014,000 1,343,748,000 1,283,914,000 1,220,443,000 1,122,311,000 1,104,553,000 1,041,354,000 993,088,000 956,645,000 925,131,000 848,518,000 852,437,000 881,889,000 803,470,000 820,868,000 878,959,000 579,428,000 557,217,000 517,182,000 472,607,000 447,306,000 440,110,000 358,396,000 337,984,000 338,651,000 343,002,000 314,392,000 296,073,000 264,541,000 257,026,000 232,127,000 233,162,000 232,492,000 192,706,000 172,363,000 155,262,000 150,045,000 168,603,000 156,595,000 
        operating lease liabilities
      		122,256,000 113,643,000 119,067,000 124,946,000 126,660,000 126,234,000 128,277,000 131,796,000 136,156,000 142,122,000 143,039,000 139,390,000 142,689,000 138,867,000 139,203,000 134,977,000 141,624,000 130,965,000 128,211,000 112,850,000 114,144,000 115,143,000 110,670,000 114,984,000 51,395,000 45,212,000 46,022,000 43,731,000 46,238,000           
        deferred income tax liability
      		3,925,000 1,355,000 1,899,000 2,016,000 1,838,000 1,800,000 2,289,000 2,294,000 2,364,000 2,404,000 1,128,000 1,098,000 1,090,000 1,070,000 911,000 1,002,000 1,055,000 1,080,000 17,604,000 16,242,000 14,876,000 13,551,000 19,861,000 15,341,000 14,022,000 12,849,000 5,578,000 4,599,000 3,435,000 439,000 2,636,000 602,000 596,000 560,000 513,000 481,000 11,683,000 12,030,000 20,506,000 
        other long-term liabilities
      		60,104,000 57,655,000 54,491,000 51,917,000 52,951,000 42,734,000 30,702,000 29,271,000 29,082,000 28,221,000 23,124,000 22,953,000 22,793,000 22,701,000 17,558,000 17,263,000 17,223,000 17,745,000 16,061,000 16,127,000 16,107,000 16,094,000 15,586,000 15,756,000 15,767,000 15,725,000 14,330,000 14,403,000 14,625,000 12,804,000 11,014,000 10,683,000 10,440,000 10,740,000 8,538,000 8,343,000 8,092,000 7,968,000 5,249,000 
        total liabilities
      		1,531,299,000 1,516,401,000 1,459,371,000 1,399,322,000 1,303,760,000 1,275,321,000 1,202,622,000 1,156,449,000 1,124,247,000 1,097,878,000 1,015,809,000 1,015,878,000 1,048,461,000 966,108,000 978,540,000 1,032,201,000 739,330,000 707,007,000 679,058,000 617,826,000 592,433,000 584,898,000 504,513,000 484,065,000 419,835,000 416,788,000 380,322,000 358,806,000 384,620,000 378,230,000 388,454,000 428,100,000 461,951,000 447,187,000 398,626,000 356,288,000 345,113,000 368,395,000 365,947,000 
        commitments and contingencies
      		                                       
        shareholders’ equity:
      		                                       
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at march 31, 2026 and december 31, 2025
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at march 31, 2026 and december 31, 2025; 28,559,689 and 28,370,780 shares issued and outstanding at march 31, 2026 and december 31, 2025, respectively
      		286,000                                       
        treasury stock
      		-12,156,000 -12,156,000 -12,235,000 -12,235,000 -12,235,000 -12,235,000 -12,235,000 -12,235,000 -12,235,000 -12,322,000 -12,322,000 -12,322,000 -12,322,000 -12,497,000 -14,243,000 -14,243,000 -14,243,000 -5,427,000 -5,578,000 -5,578,000 -5,578,000 -5,578,000 -6,030,000 -6,030,000 -6,030,000 -6,030,000 -6,030,000 -6,030,000 -6,030,000 -6,030,000 -6,030,000 -6,030,000 -6,030,000 -6,030,000      
        additional paid-in capital
      		953,416,000 935,830,000 907,483,000 893,174,000 886,883,000 844,050,000 836,903,000 818,903,000 814,649,000 802,681,000 795,994,000 785,292,000 778,691,000 770,794,000 759,986,000 753,300,000 746,123,000 727,857,000 721,597,000 716,547,000 707,877,000 695,904,000 687,618,000 676,621,000 673,372,000 666,585,000 663,044,000 651,784,000 643,497,000 639,381,000 636,536,000 634,469,000 632,374,000 630,341,000 628,558,000 627,407,000 625,296,000 623,629,000 622,071,000 
        accumulated deficit
      		-336,111,000       -30,790,000 -119,141,000 -221,645,000 -300,197,000 -371,022,000 -408,099,000                -13,136,000 -41,487,000 -67,294,000 -86,599,000 -115,521,000 -120,402,000 -77,420,000 -18,419,000 -1,577,000 -9,584,000 -9,563,000 
        accumulated other comprehensive loss
      		-7,121,000 -4,906,000 -5,652,000 -5,654,000 -11,621,000 -14,743,000 -9,176,000 -12,589,000 -12,041,000 -10,072,000 -12,870,000 -11,194,000 -11,314,000 -12,392,000 -16,052,000 -9,972,000 -6,388,000 -4,846,000 -3,243,000 -1,760,000 -2,266,000 -131,000 -2,123,000 -3,223,000 -3,729,000 -2,741,000 -3,663,000 -2,377,000 -2,791,000 -2,517,000 -2,179,000 -2,115,000 -105,000 -734,000 -1,263,000 -2,028,000 -3,146,000 -3,742,000 -2,375,000 
        total shareholders’ equity
      		598,314,000 459,071,000 293,641,000 172,351,000 593,609,000 825,545,000 881,439,000 763,599,000 671,542,000 558,950,000 470,912,000 391,060,000 347,262,000 386,387,000 349,885,000 283,252,000 605,016,000 952,928,000 898,085,000 851,882,000 858,927,000 805,779,000 791,629,000 738,069,000 717,799,000 726,283,000 692,007,000 658,055,000 621,897,000 589,703,000 561,389,000 540,081,000 511,073,000 503,530,000 550,250,000 607,358,000 620,980,000 610,710,000 610,540,000 
        total liabilities and shareholders’ equity
      		2,129,613,000 1,975,472,000 1,753,012,000 1,571,673,000 1,897,369,000 2,100,866,000 2,084,061,000 1,920,048,000 1,795,789,000 1,656,828,000 1,486,721,000 1,406,938,000 1,395,723,000 1,352,495,000 1,328,425,000 1,315,453,000 1,344,346,000 1,659,935,000 1,577,143,000 1,469,708,000 1,451,360,000 1,390,677,000 1,296,142,000 1,222,134,000 1,137,634,000 1,143,071,000 1,072,329,000 1,016,861,000 1,006,517,000 967,933,000 949,843,000 968,181,000 973,024,000 950,717,000 948,876,000 963,646,000 966,093,000 979,105,000 976,487,000 
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at december 31, 2025 and 2024
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at december 31, 2025 and 2024; 28,370,780 and 30,630,799 shares issued and outstanding at december 31, 2025 and 2024, respectively
      		 284,000                                      
        (accumulated deficit) retained earnings
      		 -459,981,000 -596,237,000 -703,215,000 -269,716,000         -359,827,000 -380,115,000 -446,142,000 -120,812,000                       
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at september 30, 2025 and december 31, 2024
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at september 30, 2025 and december 31, 2024; 28,168,223 and 30,630,799 shares issued and outstanding at september 30, 2025 and december 31, 2024, respectively
      		  282,000                                     
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at june 30, 2025 and december 31, 2024
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at june 30, 2025 and december 31, 2024; 28,088,626 and 30,630,799 shares issued and outstanding at june 30, 2025 and december 31, 2024, respectively
      		   281,000                                    
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at march 31, 2025 and december 31, 2024
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at march 31, 2025 and december 31, 2024; 29,836,211 and 30,630,799 shares issued and outstanding at march 31, 2025 and december 31, 2024, respectively
      		    298,000                                   
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at december 31, 2024 and 2023, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at december 31, 2024 and 2023, respectively; 30,630,799 and 30,752,292 shares issued and outstanding at december 31, 2024 and 2023, respectively
      		     306,000                                  
        retained earnings
      		     8,167,000 65,636,000           234,984,000 184,950,000 142,315,000 158,535,000 115,229,000 111,807,000 70,347,000 53,831,000 68,109,000 38,296,000 14,319,000            
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at september 30, 2024 and december 31, 2023
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at september 30, 2024 and december 31, 2023; 31,081,601 and 30,752,292 shares issued and outstanding at september 30, 2024 and december 31, 2023, respectively
      		      311,000                                 
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at june 30, 2024 and december 31, 2023
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at june 30, 2024 and december 31, 2023; 31,001,549 and 30,752,292 shares issued and outstanding at june 30, 2024 and december 31, 2023, respectively
      		       310,000                                
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at march 31, 2024 and december 31, 2023
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at march 31, 2024 and december 31, 2023; 30,983,185 and 30,752,292 shares issued and outstanding at march 31, 2024 and december 31, 2023, respectively
      		        310,000                               
        short-term debt
      		           55,000,000 115,000,000 50,000,000 139,700,000 249,700,000                        
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at december 31, 2023 and 2022, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at december 31, 2023 and 2022, respectively; 30,752,292 and 31,091,694 shares issued and outstanding at december 31, 2023 and 2022, respectively
      		         308,000                              
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at september 30, 2023 and december 31, 2022, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at september 30, 2023 and december 31, 2022, respectively; 30,682,157 and 31,091,694 shares issued and outstanding at september 30, 2023 and december 31, 2022, respectively
      		          307,000                             
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at june 30, 2023 and december 31, 2022, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at june 30, 2023 and december 31, 2022, respectively; 30,562,773 and 31,091,694 shares issued and outstanding at june 30, 2023 and december 31, 2022, respectively
      		           306,000                            
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at march 31, 2023 and december 31, 2022, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at march 31, 2023 and december 31, 2022, respectively; 30,623,655 and 31,091,694 shares issued and outstanding at march 31, 2023 and december 31, 2022, respectively
      		            306,000                           
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at december 31, 2022 and 2021, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at december 31, 2022 and 2021, respectively; 31,091,694 and 36,006,778 shares issued and outstanding at december 31, 2022 and 2021, respectively
      		             309,000                          
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at september 30, 2022 and december 31, 2021, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at september 30, 2022 and december 31, 2021, respectively; 31,098,397 and 36,006,778 shares issued and outstanding at september 30, 2022 and december 31, 2021, respectively
      		              309,000                         
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at june 30, 2022 and december 31, 2021, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at june 30, 2022 and december 31, 2021, respectively; 30,987,636 and 36,006,778 shares issued and outstanding at june 30, 2022 and december 31, 2021, respectively
      		               309,000                        
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at march 31, 2022 and december 31, 2021, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at march 31, 2022 and december 31, 2021, respectively; 33,651,360 and 36,006,778 shares issued and outstanding at march 31, 2022 and december 31, 2021, respectively
      		                336,000                       
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at december 31, 2021 and 2020, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at december 31, 2021 and 2020, respectively; 36,006,778 and 35,519,989 shares issued and outstanding at december 31, 2021 and 2020, respectively
      		                 360,000                      
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at september 30, 2021 and december 31, 2020, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at september 30, 2021 and december 31, 2020, respectively; 35,939,191 and 35,519,989 shares issued and outstanding at september 30, 2021 and december 31, 2020, respectively
      		                  359,000                     
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at june 30, 2021 and december 31, 2020, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at june 30, 2021 and december 31, 2020, respectively; 35,819,012 and 35,519,989 shares issued and outstanding at june 30, 2021 and december 31, 2020, respectively
      		                   358,000                    
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at march 31, 2021 and december 31, 2020, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at march 31, 2021 and december 31, 2020, respectively; 35,926,158 and 35,519,989 shares issued and outstanding at march 31, 2021 and december 31, 2020, respectively
      		                    359,000                   
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at december 31, 2020 and 2019, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at december 31, 2020 and 2019, respectively; 35,519,989 and 36,065,278 shares issued and outstanding at december 31, 2020 and 2019, respectively
      		                     355,000                  
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at september 30, 2020 and december 31, 2019, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at september 30, 2020 and december 31, 2019, respectively; 35,757,453 and 36,065,278 shares issued and outstanding at september 30, 2020 and december 31, 2019, respectively
      		                      357,000                 
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at june 30, 2020 and december 31, 2019, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at june 30, 2020 and december 31, 2019, respectively; 35,408,120 and 36,065,278 shares issued and outstanding at june 30, 2020 and december 31, 2019, respectively
      		                       354,000                
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at march 31, 2020 and december 31, 2019, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at march 31, 2020 and december 31, 2019, respectively; 35,484,473 and 36,065,278 shares issued and outstanding at march 31, 2020 and december 31, 2019, respectively
      		                        355,000               
        restricted cash
      		                             7,000 7,000 7,000 7,000 7,000 79,000 275,000 293,000 308,000 3,363,000 
        long-term debt, net, less current portion
      		                            55,781,000 79,721,000 113,689,000 147,021,000 181,067,000 205,111,000 169,152,000 143,191,000 147,230,000 151,267,000 154,614,000 
        deemed landlord liability, less current portion
      		                             24,484,000 25,035,000 25,571,000 26,091,000 26,602,000 27,104,000 27,591,000 28,063,000 28,527,000 28,983,000 
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at december 31, 2019 and 2018, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at december 31, 2019 and 2018, respectively; 36,065,278 and 35,665,910 shares issued and outstanding at december 31, 2019 and 2018, respectively
      		                         360,000              
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at september 30, 2019 and december 31, 2018, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at september 30, 2019 and december 31, 2018, respectively; 36,011,725 and 35,665,910 shares issued and outstanding at september 30, 2019 and december 31, 2018, respectively
      		                          360,000             
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at june 30, 2019 and december 31, 2018, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at june 30, 2019 and december 31, 2018, respectively; 35,894,048 and 35,665,910 shares issued and outstanding at june 30, 2019 and december 31, 2018, respectively
      		                           359,000            
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at march 31, 2019 and december 31, 2018, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at march 31, 2019 and december 31, 2018, respectively; 35,728,989 and 35,665,910 shares issued and outstanding at march 31, 2019 and december 31, 2018, respectively
      		                            357,000           
        pre-funded study costs
      		                                 57,406,000 53,246,000 48,530,000 48,473,000 51,948,000 53,418,000 
        current portion of long-term debt
      		                               16,500,000 16,500,000 16,500,000 15,469,000 14,438,000 13,406,000 12,375,000  
        deferred credit
      		                             3,756,000 3,953,000 11,061,000 11,265,000 11,468,000 20,956,000 21,420,000    
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at december 31, 2018 and 2017, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at december 31, 2018 and 2017, respectively; 35,665,910 and 35,466,510 shares issued and outstanding at december 31, 2018 and 2017, respectively
      		                             356,000          
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at september 30, 2018 and december 31, 2017, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at september 30, 2018 and december 31, 2017, respectively; 35,587,848 and 35,466,510 shares issued and outstanding at september 30, 2018 and december 31, 2017, respectively
      		                              356,000         
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at june 30, 2018 and december 31, 2017, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at june 30, 2018 and december 31, 2017, respectively; 35,545,233 and 35,466,510 shares issued and outstanding at june 30, 2018 and december 31, 2017, respectively
      		                               356,000        
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at march 31, 2018 and december 31, 2017, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at march 31, 2018 and december 31, 2017, respectively; 35,504,675 and 35,466,510 shares issued and outstanding at march 31, 2018 and december 31, 2017, respectively
      		                                355,000       
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; 0 shares issued and outstanding at december 31, 2017 and 2016, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at december 31, 2017 and 2016, respectively; 35,466,510 and 40,662,856 shares issued and outstanding at december 31, 2017 and 2016, respectively
      		                                 355,000      
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at september 30, 2017 and december 31, 2016, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at september 30, 2017 and december 31, 2016, respectively; 37,403,764 and 40,662,856 shares issued and outstanding at september 30, 2017 and december 31, 2016, respectively
      		                                  375,000     
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at june 30, 2017 and december 31, 2016, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at june 30, 2017 and december 31, 2016, respectively; 39,692,999 and 40,662,856 shares issued and outstanding at june 30, 2017 and december 31, 2016, respectively
      		                                   398,000    
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at march 31, 2017 and december 31, 2016, respectively
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares authorized at march 31, 2017 and december 31, 2016, respectively; 40,675,553 and 40,662,856 shares issued and outstanding at march 31, 2017 and december 31, 2016, respectively
      		                                    407,000   
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at december 31, 2016; no shares authorized at december 31, 2015
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares and 60,000,000 shares authorized at december 31, 2016 and 2015, respectively 40,662,856 and 32,624,461 shares issued and outstanding at december 31, 2016 and 2015, respectively
      		                                     407,000  
        preferred stock - 0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at september 30, 2016; no shares authorized at december 31, 2015
      		                                       
        common stock - 0.01 par-value; 250,000,000 shares and 60,000,000 shares authorized at september 30, 2016 and december 31, 2015, respectively; 40,716,410 and 32,624,461 shares issued and outstanding at september 30, 2016 and december 31, 2015, respectively
      		                                      407,000 
      Cashflow 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 2019-12-31 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 
                                              
          cash flows from operating activities:
        		                                      
          net income
        		123,870,000 135,133,000 111,135,000 90,260,000 114,595,000 117,018,000 96,426,000 88,351,000 102,591,000 78,298,000 70,550,000 61,068,000 72,894,000 68,670,000 66,027,000 49,360,000 61,311,000 50,034,000 48,574,000 39,934,000 43,306,000 50,866,000 41,460,000 24,104,000 28,954,000 29,813,000 23,977,000 27,455,000 19,198,000 22,761,000 19,305,000 16,568,000 14,551,000 11,291,000 9,831,000 9,553,000 8,447,000 -21,000 
          adjustments to reconcile net income to net cash from operating activities:
        		                                      
          depreciation
        		6,751,000 6,894,000 6,813,000 6,777,000 6,694,000 7,145,000 7,158,000 6,874,000 6,631,000 6,422,000 6,329,000 5,970,000 5,408,000 5,061,000 4,951,000 4,707,000 4,270,000 4,186,000 4,056,000 3,951,000 3,812,000 3,534,000 2,991,000 2,674,000 2,453,000 2,325,000 2,062,000 1,982,000 1,991,000 2,357,000 2,343,000 2,226,000 2,314,000 2,106,000 2,237,000 2,101,000 2,130,000 1,961,000 
          amortization
        		155,000 237,000 236,000 237,000 236,000 361,000 360,000 361,000 361,000 550,000 549,000 550,000 550,000 838,000 838,000 838,000 838,000 1,279,000 1,278,000 1,279,000 1,278,000 1,949,000 1,950,000 1,980,000 1,997,000 2,995,000 2,995,000 2,995,000 5,844,000 7,390,000 7,390,000 7,390,000 7,391,000 9,494,000 9,496,000 9,462,000 9,448,000 12,668,000 
          stock-based compensation expense
        		4,918,000 5,620,000 6,323,000 5,951,000 16,892,000 5,889,000 11,727,000 3,588,000 4,310,000 5,165,000 5,007,000 4,906,000 5,438,000 5,593,000 5,794,000 5,653,000 4,372,000 3,981,000 4,047,000 3,570,000 2,871,000 2,961,000 2,762,000 2,616,000 5,445,000 2,707,000 9,466,000 5,385,000 3,183,000 2,113,000 1,432,000 1,487,000 1,467,000 1,248,000 981,000 1,200,000 1,034,000 1,256,000 
          noncash lease expense
        		5,849,000 5,685,000 5,642,000 5,623,000 6,064,000 5,819,000 5,844,000 5,765,000 5,696,000 5,067,000 4,920,000 4,902,000 4,757,000 4,555,000 4,501,000 4,422,000 4,537,000 4,410,000 3,979,000 3,996,000 3,903,000 3,956,000 3,680,000 3,371,000 2,917,000 2,737,000 2,425,000 2,424,000 2,363,000          
          deferred income tax provision
        		18,543,000 17,407,000 28,510,000 34,107,000 749,000         -20,888,000 -687,000 -726,000 -713,000 -40,411,000 632,000 1,378,000 1,289,000 -6,384,000 4,495,000 1,337,000 1,079,000 7,211,000 999,000 1,184,000 656,000 -3,318,000         
          other
        		400,000 -442,000 87,000 -18,000 -502,000 -173,000 67,000 327,000 -4,230,000 1,884,000 1,720,000 556,000 -1,455,000 -1,622,000 438,000 -58,000 -265,000 463,000 82,000 7,000 124,000 63,000 180,000 -198,000 -67,000 -14,000 1,758,000 53,000 -43,000 1,166,000 -256,000 775,000 -32,000 -58,000 129,000 -492,000 -252,000 -763,000 
          changes in assets and liabilities:
        		                                      
          accounts receivable and unbilled
        		7,822,000 -29,096,000 4,861,000 -79,911,000 -2,069,000 15,274,000 -10,318,000 -21,830,000 19,116,000 -8,968,000 -17,580,000 -17,390,000 -4,344,000 -4,482,000 -23,379,000 -835,000 -38,224,000 64,000 -24,693,000 -1,442,000 1,089,000 -26,930,000 -7,124,000 9,223,000 19,301,000 -15,274,000 9,488,000 -19,725,000 4,255,000 -14,202,000 7,444,000 -2,529,000 -17,760,000 -8,238,000 1,935,000 5,697,000 -2,292,000 2,879,000 
          prepaid expenses and other current assets
        		-1,795,000 -11,494,000 17,523,000 -15,577,000 -17,553,000 -982,000 143,000 -2,046,000 -9,205,000 11,940,000 2,877,000 -1,626,000 -10,205,000 7,222,000 1,392,000 -13,242,000 -5,547,000 12,915,000 -7,160,000 -8,816,000 -6,073,000 6,096,000 -8,960,000 1,834,000 -2,694,000 1,658,000 -5,625,000 -1,772,000 -1,642,000 1,301,000 -1,738,000 -590,000 -214,000 -2,262,000 -752,000 -272,000 -247,000 5,072,000 
          accounts payable
        		84,000 1,333,000 -10,725,000 1,301,000 10,720,000 64,000 -576,000 4,898,000 -7,351,000 1,972,000 -3,262,000 -2,116,000 4,457,000 5,661,000 -1,782,000 3,593,000 -1,041,000 -284,000 2,420,000 2,368,000 -2,638,000 3,014,000 1,562,000 -364,000 -6,809,000 1,912,000 -2,520,000 8,022,000 -2,684,000 2,665,000 -2,698,000 676,000 699,000 5,283,000 2,388,000 -1,524,000 -1,331,000 1,634,000 
          accrued expenses
        		-1,300,000 39,562,000 45,272,000 35,409,000 -23,160,000 2,949,000 13,018,000 22,047,000 -21,132,000 27,157,000 33,664,000 30,623,000 -9,364,000 4,628,000 32,205,000 19,294,000 -3,651,000 1,465,000 12,754,000 21,980,000 -10,043,000 16,612,000 13,552,000 -4,176,000 -1,757,000 6,397,000 9,361,000 11,287,000 -5,221,000 7,416,000 7,429,000 8,916,000 5,268,000 3,527,000 3,558,000 2,110,000 -10,508,000 3,259,000 
          advanced billings
        		1,954,000 20,062,000 25,545,000 90,067,000 8,131,000 39,646,000 32,522,000 21,720,000 56,837,000 41,105,000 28,198,000 24,517,000 3,311,000 44,802,000 16,559,000 34,147,000 22,580,000 40,793,000 21,631,000 4,410,000 22,143,000 53,052,000 7,261,000 5,789,000 -2,695,000 22,683,000 4,355,000 15,109,000 2,437,000 7,316,000 12,431,000 9,029,000 6,817,000 5,354,000 2,675,000 4,952,000 -5,246,000 -1,837,000 
          lease liabilities
        		-5,294,000 -7,029,000 -5,516,000 -6,067,000 -6,548,000 -5,990,000 -4,392,000 -5,079,000 -5,946,000 -4,440,000 -5,054,000 -4,095,000 -5,284,000 -4,765,000 -3,429,000 -4,163,000 -3,542,000 -4,297,000 -3,379,000 -4,801,000 -3,155,000 -3,999,000 -2,574,000 -2,697,000 -2,236,000 -2,557,000 -2,139,000 -2,297,000 -2,041,000          
          other assets and liabilities
        		-10,169,000 8,780,000 10,503,000 -19,633,000 11,587,000 27,845,000 -1,390,000 -8,525,000 5,864,000 4,052,000 -5,934,000 -22,701,000 14,976,000 21,566,000 5,218,000 -6,216,000 1,486,000 -3,537,000 8,299,000 -4,886,000 -420,000 883,000 -1,297,000 -1,051,000 3,441,000 -5,453,000 7,811,000 -6,008,000 5,771,000 2,530,000 -1,173,000 -2,521,000 3,089,000 1,724,000 1,253,000 -2,079,000 1,884,000 1,527,000 
          net cash from operating activities
        		151,788,000 192,652,000 246,209,000 148,526,000 125,836,000 190,666,000 149,075,000 116,397,000 152,677,000 156,395,000 114,385,000 82,518,000 80,076,000 136,684,000 108,491,000 96,619,000 46,256,000 70,894,000 72,353,000 62,761,000 57,319,000 105,498,000 59,763,000 44,267,000 49,148,000 56,940,000 64,292,000 46,630,000 34,005,000 39,442,000 52,501,000 41,343,000 23,298,000 28,652,000 39,000,000 30,408,000 -675,000 29,571,000 
          capital expenditures
        		0 0 0 0 0 2,299,000 -851,000 -1,809,000 5,345,000 550,000 -1,144,000 -1,368,000 7,216,000 -1,256,000 1,653,000 0 0 928,000 -400,000 0 0 8,248,000 -965,000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
          free cash flows
        		151,788,000 192,652,000 246,209,000 148,526,000 125,836,000 192,965,000 148,224,000 114,588,000 158,022,000 156,945,000 113,241,000 81,150,000 87,292,000 135,428,000 110,144,000 96,619,000 46,256,000 71,822,000 71,953,000 62,761,000 57,319,000 113,746,000 58,798,000 44,267,000 49,148,000 56,940,000 64,292,000 46,630,000 34,005,000 39,442,000 52,501,000 41,343,000 23,298,000 28,652,000 39,000,000 30,408,000 -675,000 29,571,000 
          cash flows from investing activities:
        		                                      
          property and equipment expenditures
        		-6,814,000 -4,536,000 -10,713,000 -6,113,000 -9,994,000 -7,643,000 -10,537,000 -12,871,000 -5,497,000 -9,986,000 -8,703,000 -8,446,000 -9,513,000 -9,243,000 -7,179,000 -11,200,000 -9,257,000 -9,116,000 -6,640,000 -6,008,000 -6,507,000 -7,786,000 -8,669,000 -9,324,000 -5,561,000 -5,760,000 -6,162,000 -3,470,000 -2,520,000 -3,449,000 -2,782,000 -5,842,000 -3,951,000 -3,395,000 -2,310,000 -1,645,000 -4,374,000 -5,694,000 
          net cash from investing activities
        		-6,748,000 -4,473,000 -10,660,000 -6,020,000 -9,987,000 -7,562,000 -10,486,000 -12,790,000 2,530,000 -7,997,000 -8,662,000 -8,467,000 -9,503,000 -9,220,000 -7,187,000 -11,127,000 -11,208,000 -9,116,000 -6,600,000 -5,997,000 -9,651,000 -7,734,000 -8,643,000 -9,315,000 -5,522,000 -5,730,000 -6,132,000 -3,440,000 -3,842,000 -4,212,000 -2,790,000 -6,043,000 -3,928,000 -3,383,000 -2,349,000 -2,147,000 -4,358,000 -5,662,000 
          cash flows from financing activities:
        		                                      
          proceeds from stock option exercises
        		12,670,000 22,729,000 7,987,000 351,000 25,934,000 1,258,000 6,274,000 666,000 7,660,000 1,523,000 5,728,000 1,664,000 2,463,000 5,761,000 892,000 1,554,000 13,867,000 2,431,000 1,012,000 5,098,000 9,102,000 7,239,000 6,777,000 645,000 1,331,000 834,000 1,795,000 2,919,000 972,000 679,000 635,000 609,000 566,000 625,000 232,000 762,000 193,000 85,000 
          repurchases of common stock
        		 0 -4,574,000 -540,915,000 -371,900,000     0 0 -23,874,000 -120,146,000 -47,182,000 0 -374,717,000 -425,950,000 0 -6,219,000   -47,447,000 0 -9,051,000 -41,776,000         -60,323,000 -68,855,000    
          net cash from financing activities
        		12,670,000 22,729,000 3,413,000 -540,564,000 -345,966,000 -168,609,000 6,274,000 666,000 7,660,000 1,523,000 -49,272,000 -82,210,000 -52,683,000 -131,121,000 -109,108,000 -123,463,000 -412,083,000 2,431,000 -5,207,000 -50,779,000 9,102,000 -40,208,000 6,777,000 -8,406,000 -40,445,000 834,000 1,795,000 -53,519,000 -23,028,000 -33,847,000 -49,748,000 -33,975,000 -24,010,000 -23,234,000 -42,144,000 -29,145,000 -3,305,000 -3,136,000 
          effect of exchange rates on cash, cash equivalents, and restricted cash
        		-2,078,000 790,000 59,000 2,952,000 2,117,000 -1,959,000 1,143,000 -389,000 -1,306,000 321,000 -382,000 375,000 767,000 915,000 -3,740,000 -2,321,000 -1,426,000 -1,292,000 -1,168,000 147,000 -1,659,000 983,000 427,000 358,000 -1,102,000 586,000 -763,000 300,000 -290,000 -352,000 51,000 -1,340,000 400,000 210,000 410,000 605,000 540,000  
          increase in cash, cash equivalents, and restricted cash
        		155,632,000 211,698,000 239,021,000 -395,106,000 -228,000,000 12,536,000 146,006,000 103,884,000 161,561,000 150,242,000 56,069,000 -7,784,000 18,657,000 -2,742,000 -11,544,000 -40,292,000 -378,461,000 62,917,000 59,378,000 6,132,000 55,111,000 58,539,000 58,324,000 26,904,000 2,079,000 52,630,000   6,845,000     2,245,000   -7,798,000  
          cash, cash equivalents, and restricted cash — beginning of period
        		497,049,000 0 0 0 669,436,000 0 0 0 245,449,000 0 0 0 28,265,000 0 0 0 461,304,000 0 0 0 277,766,000 0 0 0 131,920,000 0 0 0 23,282,000 0 0 0 26,492,000 0 0 0 37,407,000  
          cash, cash equivalents, and restricted cash — end of period
        		652,681,000 211,698,000 239,021,000 -395,106,000 441,436,000 12,536,000 146,006,000 103,884,000 407,010,000 150,242,000 56,069,000 -7,784,000 46,922,000 -2,742,000 -11,544,000 -40,292,000 82,843,000 62,917,000 59,378,000 6,132,000 332,877,000 58,539,000 58,324,000 26,904,000 133,999,000 52,630,000 59,192,000 -10,029,000 30,127,000 1,031,000 14,000 -15,000 22,252,000 2,245,000 -5,083,000 -279,000 29,609,000  
          supplemental disclosure of cash flow information —
        		                                      
          share repurchases—non-cash
        		    22,343,000                                  
          proceeds from revolving loan
        		         0 0 15,000,000 90,000,000 25,000,000 0 249,700,000 49,500,000                 60,000,000     
          payments on revolving loan
        		         0 -55,000,000 -75,000,000 -25,000,000 -114,700,000 -110,000,000 0 -49,500,000             0 -20,000,000 -30,000,000 -20,000,000 -20,000,000     
          supplemental disclosure of cash flow information—
        		                                      
          cash paid during the period for income taxes
        		                                      
          cash paid during the period for interest
        		                                      
          acquisition of property and equipment—non-cash
        		     2,299,000 -851,000 -1,809,000 5,345,000 550,000 -1,144,000 -1,368,000 7,216,000 -1,256,000 1,653,000   928,000 -400,000   8,248,000 -965,000                
          deferred income tax benefit
        		     -24,199,000 -1,514,000 -54,000 -865,000 -13,809,000 -7,599,000 -2,646,000 -1,063,000                   -38,000 -248,000  444,000 -454,000 -410,000 -8,438,000 
          amortization and adjustment of deferred credit
        		             -155,000 -155,000 -155,000 -155,000 -167,000 -167,000 -167,000 -167,000 -175,000 -175,000 -175,000 -181,000 -200,000 -201,000 -200,000 -200,000 -197,000 -7,108,000 -204,000 -203,000      
          acquistion of property and equipment—non-cash
        		                7,375,000                      
          amortization of debt issuance costs and discount
        		                         0 80,000 736,000 138,000 144,000 154,000 158,000 159,000 164,000 166,000 167,000 165,000 552,000 
          payment of debt
        		                         0 0 -56,438,000 -24,000,000 -34,032,000 -29,906,000 -4,125,000 -4,125,000 -3,094,000 -3,094,000 -3,093,000 -3,094,000 -165,006,000 
          payment of deemed landlord liability
        		                             -494,000 -477,000 -459,000 -451,000 -442,000 -427,000 -409,000 -404,000 -396,000 
          pre-funded study costs
        		                                 4,143,000 4,659,000 -13,000 -3,497,000 -1,410,000 
          acquisition of intangibles
        		                                 0 -54,000    
          decrease in cash, cash equivalents, and restricted cash
        		                              14,000 -15,000 -4,240,000      
          loss on extinguishment of debt
        		                                      
          payment for common stock issuance costs
        		                                     0 
          excess tax benefit from stock-based compensation
        		                                      
          proceeds from issuance of debt, net of original issue discount
        		                                      
          debt issuance costs
        		                                      
          payment on debt extinguishment
        		                                      
          proceeds from common stock issued
        		                                      
          impairment of goodwill
        		                                      
          proceeds from common stock issued, net of underwriters discount
        		                                      
          adjustments to reconcile net income to net cash provided by operating activities:
        		                                      
          acquisition of predecessor, net of cash and restricted cash received
        		                                      
          payment on revolving loan
        		                                      
          restricted cash
        		                                      
          effect of exchange rates on cash and cash equivalents
        		                                      
          decreases in cash and cash equivalents
        		                                      
          cash and cash equivalents — beginning of period
        		                                      
          cash and cash equivalents — end of period