7Baggers

CoStar Group, Inc
(NASDAQ:CSGP) 

CSGP stock logo

CoStar Group, Inc. provides information, analytics, and online marketplace services to the commercial real estate, hospitality, residential, and related professionals industries in the United States, Canada, Europe, the Asia Pacific, and Latin America. It offers CoStar Property Professional that pro...

Founded: 1987
Full Time Employees: 4,300
Sector: Real Estate
Industry: Real Estate Services

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At a glance:
Bull Thesis:
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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 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 2004-09-30 2004-06-30 2004-03-31 2003-12-31 2003-09-30 2003-06-30 2003-03-31 2002-12-31 2002-09-30 2002-06-30 2002-03-31 2001-09-30 
                                                                                                      
      revenue
    897,000,000                                                                                                  
      cost of revenue
    196,000,000                                                                                                  
      gross profit
    701,000,000 707,200,000 661,400,000 613,500,000 578,900,000 568,500,000 552,000,000 542,000,000 515,200,000 503,783,000 501,003,000 493,544,000 465,170,000 464,151,000 448,557,000 435,337,000 420,346,000 420,456,000 406,722,000 390,767,000 368,949,000 366,239,000 347,755,000 323,119,000 312,938,000 299,730,000 281,636,000 271,842,000 257,272,000 247,323,000 233,453,000 229,882,000 211,241,000                                                                  
      yoy
    21.09% 24.40% 19.82% 13.19% 12.36% 12.85% 10.18% 9.82% 10.76% 8.54% 11.69% 13.37% 10.66% 10.39% 10.29% 11.41% 13.93% 14.80% 16.96% 20.94% 17.90% 22.19% 23.48% 18.86% 21.64% 21.19% 20.64% 18.25% 21.79%                                                                      
      qoq
    -0.88% 6.92% 7.81% 5.98% 1.83% 2.99% 1.85% 5.20% 2.27% 0.55% 1.51% 6.10% 0.22% 3.48% 3.04% 3.57% -0.03% 3.38% 4.08% 5.91% 0.74% 5.32% 7.62% 3.25% 4.41% 6.42% 3.60% 5.66% 4.02% 5.94% 1.55% 8.82%                                                                   
      gross margin %
    Infinity% 120.52% 79.34% 78.52% 79.06% 80.14% 79.70% 79.96% 78.49% 78.71% 80.20% 81.46% 79.60% 80.95% 80.54% 81.17% 81.49% 82.97% 81.46% 81.35% 80.61% 82.41% 81.71% 81.36% 79.86% 79.99% 79.83% 79.08% 78.34% 78.37% 76.41% 77.40% 77.17% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 
      operating expenses:
                                                                                                      
      selling and marketing
    421,000,000 377,900,000 418,300,000 394,900,000 368,900,000 308,600,000 331,200,000 358,400,000 366,100,000 246,747,000 266,893,000 250,026,000 226,234,000 173,486,000 185,395,000 181,344,000 143,997,000 138,653,000 180,055,000 164,612,000 138,687,000 133,576,000 146,634,000 130,461,000 125,107,000 99,845,000 101,582,000 119,075,000 88,094,000 69,152,000 89,251,000 112,965,000 88,490,000 77,529,000 72,705,000 91,726,000 76,402,000 65,397,000 75,414,000 80,468,000 75,204,000 59,808,000 80,506,000 92,434,000 69,478,000 41,003,000 40,668,000 40,889,000 27,745,000 24,569,000 23,625,000 23,536,000 26,978,000 26,537,000 22,010,000 20,016,000 15,550,000 16,171,000 17,467,000 14,280,000 13,246,000 13,929,000 13,017,000 12,880,000 12,629,000 11,966,000 11,630,000 9,751,000 9,161,000 8,375,000 10,336,000 12,121,000 10,873,000 9,938,000 11,924,000 14,662,000 13,166,000 4,145,558,300 8,834,000 12,109,000 10,925,000 7,312,000 9,326,000 10,429,000 9,493,000 5,387,250 7,452,000 6,898,000 7,199,000          
      software development
    114,000,000 109,000,000 105,400,000 97,100,000 94,500,000 82,300,000 81,000,000 79,600,000 82,400,000 69,750,000 67,891,000 63,369,000 66,590,000 58,403,000 56,912,000 51,587,000 54,021,000 52,522,000 53,143,000 48,573,000 46,784,000 41,573,000 40,732,000 39,001,000 41,610,000 36,580,000 32,639,000 28,455,000 27,928,000 25,580,000 26,173,000 26,271,000 22,913,000 21,796,000 21,536,000 23,144,000 22,374,000 19,861,000 19,357,000 19,547,000 17,635,000 16,720,000 17,048,000 16,844,000 15,148,000 13,705,000 14,227,000 15,143,000 12,351,000 11,605,000 11,562,000 11,488,000 12,102,000 10,042,000 9,722,000 7,977,000 5,015,000 4,617,000 5,017,000 5,135,000 5,268,000 4,781,000 4,249,000 4,123,000 4,197,000 4,245,000 3,454,000 3,065,000 3,178,000 3,082,000 3,122,000 3,141,000 3,414,000 2,341,500 3,026,000 3,270,000 3,070,000 111,270,600 2,835,000 3,084,000 2,898,000 1,864,250 2,580,000 2,545,000 2,332,000 1,578,750 2,150,000 2,236,000 1,929,000 1,282,750 1,729,000 1,702,000 1,700,000 1,038,000 1,370,000 1,385,000 1,397,000 1,322,000 
      general and administrative
    126,000,000 128,700,000 157,000,000 122,200,000 141,100,000 124,800,000 105,800,000 109,900,000 98,500,000 107,058,000 94,371,000 90,563,000 89,508,000 92,161,000 91,270,000 77,345,000 77,961,000 69,964,000 64,671,000 58,226,000 63,850,000 118,100,000 65,322,000 57,403,000 58,873,000 50,797,000 45,530,000 42,337,000 40,076,000 39,001,000 39,012,000 38,056,000 40,590,000 41,578,000 35,998,000 34,557,000 33,995,000 35,022,000 30,572,000 30,227,000 27,476,000 29,161,000 31,074,000 29,909,000 25,363,000 27,381,000 25,388,000 26,250,000 24,897,000 22,499,000 21,940,000 22,697,000 29,820,000 17,552,000 19,617,000 25,491,000 14,494,000 14,987,000 16,631,000 15,845,000 10,899,000 10,608,000 12,441,000 13,452,000 11,275,000 10,663,000 11,564,000 11,571,000 10,450,000 9,814,000 10,170,000 10,099,000 9,805,000 6,706,500 9,674,000 9,089,000 8,063,000 3,047,532,300 7,985,000 7,633,000 7,569,000 5,180,500 7,092,000 6,734,000 6,896,000 5,165,750 6,778,000 7,033,000 6,852,000 4,921,250 6,528,000 6,669,000 6,489,000 4,586,250 6,243,000 6,235,000 5,867,000 6,833,000 
      customer base amortization
    37,000,000 42,500,000 31,800,000 26,500,000 17,200,000 12,800,000 10,300,000 10,200,000 11,000,000 10,889,000 10,254,000 10,440,000 10,617,000 12,939,000 29,651,000 14,878,000 16,092,000 18,932,000 19,121,000 18,345,000 18,419,000 17,780,000 18,258,000 14,935,000 11,484,000 11,522,000 7,616,000 7,175,000 7,682,000 7,933,000 8,329,000 8,816,000 5,803,000 4,029,000 4,298,000 4,570,000 4,774,000                                                              
      operating expenses: - sum
    698,000,000         311,689,000 439,409,000 414,398,000 392,949,000 336,989,000 363,228,000 325,154,000 292,071,000 280,071,000 316,990,000 289,756,000 267,740,000 311,029,000 270,946,000 241,800,000 237,074,000 198,744,000 187,367,000 197,042,000 163,780,000 141,666,000 162,765,000 186,108,000 157,796,000 144,932,000 134,537,000 153,997,000 137,545,000 98,375,500 130,893,000 136,071,000 126,538,000 99,766,000 135,781,000 146,152,000 117,131,000 62,063,500 88,644,000   48,861,750 60,807,000 61,615,000 73,025,000 37,232,500 56,173,000 57,064,000 35,693,000 36,388,000 39,650,000 35,806,000 29,956,000 29,861,000 30,247,000 30,987,000 28,791,000 27,756,000 27,490,000 25,129,000 23,735,000 22,428,000 24,864,000   19,937,750 25,952,000 28,230,000 25,569,000 16,793,000 20,730,000 23,942,000 22,500,000        17,106,000          
      income from operations
    3,000,000 49,100,000 -51,100,000 -27,200,000 -42,800,000 40,000,000 23,700,000 -16,100,000 -42,800,000 69,339,000 61,594,000 79,146,000 72,221,000 127,162,000 85,329,000 110,183,000 128,275,000 140,385,000 89,732,000 101,011,000 101,209,000 55,210,000 76,809,000 81,319,000 75,864,000 100,986,000 94,269,000 74,800,000 93,492,000 105,657,000 70,688,000 43,774,000 53,445,000 50,758,000 57,513,000 27,883,000 37,662,000 46,889,000 39,596,000 28,119,000 30,301,000 35,522,000 -431,000 -20,129,000 -3,507,000 23,348,000 23,480,000 16,909,000 17,141,000 21,699,000 19,770,000 15,283,000 -2,598,000 9,905,000 8,946,000 -13,000 8,602,000 7,762,000 3,004,000 3,909,000 7,096,000 7,047,000 6,135,000 4,491,000 5,102,000 5,952,000 6,951,000 8,191,000 10,741,000 12,768,000 11,280,000 8,510,000 7,230,000 12,333,000 3,837,000 246,000 1,436,000 130,736,900 5,836,000 2,398,000 1,848,000 4,139,000 972,000 1,217,000 1,014,000 2,183,000 1,956,000 1,376,000 1,231,000 972,000 374,000 -423,000 -920,000 -893,000 -1,308,000 -1,481,000 -1,861,000 -4,813,000 
      yoy
    -107.01% 22.75% -315.61% 68.94% 0.00% -42.31% -61.52% -120.34% -159.26% -45.47% -27.82% -28.17% -43.70% -9.42% -4.91% 9.08% 26.74% 154.27% 16.82% 24.22% 33.41% -45.33% -18.52% 8.72% -18.86% -4.42% 33.36% 70.88% 74.93% 108.16% 22.91% 56.99% 41.91% 8.25% 45.25% -0.84% 24.29% 32.00% -9287.01% -239.69% -964.01% 52.14% -101.84% -219.04% -120.46% 7.60% 18.77% 10.64% -759.78% 119.07% 120.99% -117661.54% -130.20% 27.61% 197.80% -100.33% 21.22% 10.15% -51.04% -12.96% 39.08% 18.40% -11.74% -45.17% -52.50% -53.38% -38.38% -3.75% 48.56% 3.53% 193.98% 3359.35% 403.48% -90.57% -34.25% -89.74% -22.29% 3058.66% 500.41% 97.04% 82.25% 89.60% -50.31% -11.56% -17.63% 124.59% 422.99% -425.30% -233.80% -208.85% -128.59% -71.44% -50.56% -81.45%     
      qoq
    -93.89% -196.09% 87.87% -36.45% -207.00% 68.78% -247.20% -62.38% -161.73% 12.57% -22.18% 9.59% -43.21% 49.03% -22.56% -14.10% -8.63% 56.45% -11.17% -0.20% 83.32% -28.12% -5.55% 7.19% -24.88% 7.13% 26.03% -19.99% -11.51% 49.47% 61.48% -18.10% 5.29% -11.75% 106.27% -25.97% -19.68% 18.42% 40.82% -7.20% -14.70% -8341.76% -97.86% 473.97% -115.02% -0.56% 38.86% -1.35% -21.01% 9.76% 29.36% -688.26% -126.23% 10.72% -68915.38% -100.15% 10.82% 158.39% -23.15% -44.91% 0.70% 14.87% 36.61% -11.98% -14.28% -14.37% -15.14% -23.74% -15.88% 13.19% 32.55% 17.70% -41.38% 221.42% 1459.76% -82.87% -98.90% 2140.18% 143.37% 29.76% -55.35% 325.82% -20.13% 20.02% -53.55% 11.61% 42.15% 11.78% 26.65% 159.89% -188.42% -54.02% 3.02% -31.73% -11.68% -20.42% -61.33%  
      operating margin %
    Infinity% 8.37% -6.13% -3.48% -5.85% 5.64% 3.42% -2.38% -6.52% 10.83% 9.86% 13.06% 12.36% 22.18% 15.32% 20.54% 24.87% 27.70% 17.97% 21.03% 22.11% 12.42% 18.05% 20.48% 19.36% 26.95% 26.72% 21.76% 28.47% 33.48% 23.14% 14.74% 19.53% 19.98% 23.23% 11.76% 16.62% 21.48% 18.61% 13.59% 15.17% 18.40% -0.23% -11.80% -2.21% 14.96% 15.34% 11.45% 14.40% 18.77% 17.60% 14.02% -2.50% 9.90% 9.32% -0.02% 12.53% 11.73% 4.71% 6.29% 11.90% 12.11% 10.74% 8.04% 9.26% 10.89% 12.97% 16.36% 20.91% 24.12% 20.98% 15.91% 13.83% 24.26% 7.78% 0.51% 3.20% 0.08% 14.38% 6.16% 4.96% 11.56% 2.83% 3.70% 3.24% 7.34% 6.84% 5.01% 4.68% 3.85% 1.55% -1.83% -4.08% -4.32% -6.52% -7.58% -9.76% -26.09% 
      interest income
    10,000,000 13,000,000 26,000,000 32,500,000 38,500,000 47,200,000 55,600,000 53,500,000 56,200,000 59,719,000 58,422,000 51,911,000 43,548,000 32,586,000 10,656,000      -7,878,000 -7,913,000 -7,537,000 -3,596,000                                                          563,750 932,000 719,000    286,000           
      other expense
    -1,000,000 -1,700,000 -20,700,000  -2,400,000                                                                                              
      income before income taxes
    12,000,000 60,900,000 -45,800,000 21,600,000 -6,700,000 85,000,000 77,700,000 35,900,000 11,500,000 132,803,000 120,481,000 131,666,000 116,350,000 159,535,000 97,374,000 108,127,000 121,421,000 133,371,000 83,335,000 93,981,000 93,281,000 46,441,000 68,934,000 77,249,000 78,356,000 114,305,000 98,923,000 80,016,000 97,705,000 109,569,000 73,006,000 45,698,000 55,742,000 48,691,000 55,167,000 25,795,000 35,405,000 45,521,000 37,442,000 25,823,000 27,876,000 33,235,000 -2,752,000 -22,346,000 -5,556,000 21,204,000 20,828,000 13,218,000 15,663,000 20,092,000 18,086,000 13,608,000 -4,249,000 8,181,000 7,183,000 -1,082,000 8,852,000 7,986,000 3,198,000 4,087,000 7,298,000 7,192,000 6,291,000 4,687,000 5,340,000 6,178,000 7,214,000 8,513,000 11,183,000 13,550,000 12,231,000 9,753,000 9,168,000 14,553,000 5,909,000 2,137,000 3,298,000 2,077,643,200 7,688,000 4,008,000 3,274,000 5,339,000 1,904,000 1,936,000 1,618,000 2,662,000 2,267,000 1,662,000 1,469,000 1,153,000 439,000        
      income tax expense
    9,000,000 14,400,000 -14,900,000 15,400,000 8,100,000 25,200,000 24,700,000 16,700,000 4,800,000 36,328,000 29,907,000 31,146,000 29,219,000 35,163,000 25,084,000 24,654,000 32,103,000 40,471,000 19,031,000 32,833,000 19,069,000 10,652,000 10,748,000 16,889,000 5,563,000 26,378,000 20,304,000 16,768,000 12,536,000 26,060,000 14,247,000 1,863,000 3,511,000 4,487,000 20,990,000 3,611,000 13,275,000 15,948,000 14,241,000 10,247,000 11,155,000 10,245,000 2,610,000 -7,380,000 571,000 7,281,000 7,871,000 4,969,000 5,923,000 7,293,000 7,034,000 5,315,000 -1,839,000 3,467,000 404,000 5,628,000 3,720,000 2,810,000 887,000 1,450,000 2,766,000 3,425,000 2,909,000 1,436,000 2,451,000 2,532,000 2,889,000 3,897,000 5,077,000 6,049,000 5,586,000 4,318,000 4,126,000 1,276,250 2,659,000 962,000 1,484,000 1,527,000 2,990,000 1,704,000 1,414,000 2,136,000 767,000 793,000 644,000 -16,739,000 -100,000 -74,000 -12,000 124,000 158,000        
      net income
    3,000,000 46,500,000 -30,900,000 6,200,000 -14,800,000 59,800,000 53,000,000 19,200,000 6,700,000 96,475,000 90,574,000 100,520,000 87,131,000 124,372,000 72,290,000 83,473,000 89,318,000 92,900,000 64,304,000 61,148,000 74,212,000 35,789,000 58,186,000 60,360,000 72,793,000 87,927,000 78,619,000 63,248,000 85,169,000 83,509,000 58,759,000 43,835,000 52,231,000 44,204,000 34,177,000 22,184,000 22,130,000 29,573,000 23,201,000 15,576,000 16,721,000 22,990,000 -5,362,000 -14,966,000 -6,127,000 13,923,000 12,957,000 8,249,000 9,740,000 12,799,000 11,052,000 8,293,000 -2,410,000 4,714,000 6,779,000 -6,710,000 5,132,000 5,176,000 2,311,000 2,637,000 4,532,000 3,767,000 3,382,000 3,251,000 2,889,000 3,646,000 4,325,000 4,616,000 6,106,000 7,501,000 6,645,000 5,435,000 5,042,000 9,712,000 3,250,000 1,175,000 1,814,000 115,245,800 4,698,000 2,304,000 1,860,000 3,203,000 1,137,000 1,143,000 974,000 19,401,000 2,367,000 1,736,000 1,481,000 1,029,000 281,000 -367,000 -843,000 -770,000 -1,125,000 -1,267,000 -1,622,000 -4,013,000 
      yoy
    -120.27% -22.24% -158.30% -67.71% -320.90% -38.02% -41.48% -80.90% -92.31% -22.43% 25.29% 20.42% -2.45% 33.88% 12.42% 36.51% 20.36% 159.58% 10.51% 1.31% 1.95% -59.30% -25.99% -4.57% -14.53% 5.29% 33.80% 44.29% 63.06% 88.92% 71.93% 97.60% 136.02% 49.47% 47.31% 42.42% 32.35% 28.63% -532.69% -204.08% -372.91% 65.12% -141.38% -281.43% -162.91% 8.78% 17.24% -0.53% -504.15% 171.51% 63.03% -223.59% -146.96% -8.93% 193.34% -354.46% 13.24% 37.40% -31.67% -18.89% 56.87% 3.32% -21.80% -29.57% -52.69% -51.39% -34.91% -15.07% 21.10% -22.77% 104.46% 362.55% 177.95% -91.57% -30.82% -49.00% -2.47% 3498.06% 313.19% 101.57% 90.97% -83.49% -51.96% -34.16% -34.23% 1785.42% 742.35% -573.02% -275.68% -233.64% -124.98% -71.03% -48.03% -80.81%     
      qoq
    -93.55% -250.49% -598.39% -141.89% -124.75% 12.83% 176.04% 186.57% -93.06% 6.52% -9.89% 15.37% -29.94% 72.05% -13.40% -6.54% -3.86% 44.47% 5.16% -17.60% 107.36% -38.49% -3.60% -17.08% -17.21% 11.84% 24.30% -25.74% 1.99% 42.12% 34.05% -16.07% 18.16% 29.34% 54.06% 0.24% -25.17% 27.46% 48.95% -6.85% -27.27% -528.76% -64.17% 144.26% -144.01% 7.46% 57.07% -15.31% -23.90% 15.81% 33.27% -444.11% -151.12% -30.46% -201.03% -230.75% -0.85% 123.97% -12.36% -41.81% 20.31% 11.38% 4.03% 12.53% -20.76% -15.70% -6.30% -24.40% -18.60% 12.88% 22.26% 7.79% -48.08% 198.83% 176.60% -35.23% -98.43% 2353.08% 103.91% 23.87% -41.93% 181.71% -0.52% 17.35% -94.98% 719.65% 36.35% 17.22% 43.93% 266.19% -176.57% -56.47% 9.48% -31.56% -11.21% -21.89% -59.58%  
      net income margin %
    Infinity% 7.92% -3.71% 0.79% -2.02% 8.43% 7.65% 2.83% 1.02% 15.07% 14.50% 16.59% 14.91% 21.69% 12.98% 15.56% 17.32% 18.33% 12.88% 12.73% 16.21% 8.05% 13.67% 15.20% 18.58% 23.46% 22.28% 18.40% 25.93% 26.46% 19.23% 14.76% 19.08% 17.40% 13.81% 9.35% 9.77% 13.55% 10.91% 7.53% 8.37% 11.91% -2.84% -8.77% -3.85% 8.92% 8.47% 5.58% 8.18% 11.07% 9.84% 7.61% -2.32% 4.71% 7.06% -7.87% 7.48% 7.82% 3.62% 4.24% 7.60% 6.47% 5.92% 5.82% 5.24% 6.67% 8.07% 9.22% 11.89% 14.17% 12.36% 10.16% 9.65% 19.10% 6.59% 2.46% 4.05% 0.07% 11.58% 5.92% 4.99% 8.95% 3.31% 3.48% 3.11% 65.23% 8.27% 6.32% 5.64% 4.07% 1.17% -1.58% -3.74% -3.72% -5.60% -6.48% -8.51% -21.75% 
      earnings per share - basic
    0.01                                                                                                  
      earnings per share - diluted
    0.01                                                                                                  
      weighted-average outstanding shares - basic
    413  419.9 419.6 410.5  406.8 406 405.6  405,649 405,429 404,490  394,712 393,342 392,895  392,419 392,306 39,158  39,159 37,524 36,471  36,333 36,310 36,237  36,129 36,073                                                                   
      weighted-average outstanding shares - diluted
    414  419.9 424.3 410.5  408 407.4 407.3  407,229 406,751 406,157  396,209 394,478 394,234  394,295 394,098 39,371  39,401 37,734 36,776  36,652 36,627 36,567  36,518 36,450                                                                   
      revenues
     586,775,000 833,600,000 781,300,000 732,200,000 709,400,000 692,600,000 677,800,000 656,400,000 640,059,000 624,669,000 605,906,000 584,366,000 573,345,000 556,921,000 536,308,000 515,825,000 506,786,000 499,319,000 480,333,000 457,697,000 444,393,000 425,620,000 397,159,000 391,847,000 374,726,000 352,808,000 343,760,000 328,425,000 315,571,000 305,525,000 297,018,000 273,718,000 253,991,000 247,533,000 237,153,000 226,553,000 218,311,000 212,711,000 206,869,000 199,739,000 193,009,000 189,078,000 170,657,000 159,020,000 156,096,000 153,056,000 147,708,000 119,076,000 115,610,000 112,301,000 108,999,000 104,033,000 100,083,000 96,001,000 85,223,000 68,629,000 66,164,000 63,829,000 62,127,000 59,618,000 58,185,000 57,144,000 55,838,000 55,093,000 54,635,000 53,590,000 50,064,000 51,370,000 52,929,000 53,757,000 53,478,000 52,264,000 50,840,000 49,340,000 47,794,000 44,831,000 158,772,309,000 40,571,000 38,946,000 37,274,000 35,804,000 34,320,000 32,871,000 31,343,000 29,741,000 28,610,000 27,456,000 26,278,000 25,270,000 24,108,000 23,174,000 22,553,000 20,688,000 20,075,000 19,539,000 19,061,000 18,447,000 
      yoy
     -17.29% 20.36% 15.27% 11.55% 10.83% 10.87% 11.87% 12.33% 11.64% 12.16% 12.98% 13.29% 13.13% 11.54% 11.65% 12.70% 14.04% 17.32% 20.94% 16.81% 18.59% 20.64% 15.53% 19.31% 18.75% 15.48% 15.74% 19.99% 24.24% 23.43% 25.24% 20.82% 16.34% 16.37% 14.64% 13.42% 13.11% 12.50% 21.22% 25.61% 23.65% 23.54% 15.54% 33.54% 35.02% 36.29% 35.51% 14.46% 15.51% 16.98% 27.90% 51.59% 51.27% 50.40% 37.18% 15.11% 13.71% 11.70% 11.26% 8.21% 6.50% 6.63% 11.53% 7.25% 3.22% -0.31% -6.38% -1.71% 4.11% 8.95% 11.89% 16.58% -99.97% 21.61% 22.72% 20.27% 443348.52% 18.21% 18.48% 18.92% 20.39% 19.96% 19.72% 19.27% 17.69% 18.67% 18.48% 16.52% 22.15% 20.09% 18.60% 18.32% 12.15%     
      qoq
     -29.61% 6.69% 6.71% 3.21% 2.43% 2.18% 3.26% 2.55% 2.46% 3.10% 3.69% 1.92% 2.95% 3.84% 3.97% 1.78% 1.50% 3.95% 4.95% 2.99% 4.41% 7.17% 1.36% 4.57% 6.21% 2.63% 4.67% 4.07% 3.29% 2.86% 8.51% 7.77% 2.61% 4.38% 4.68% 3.78% 2.63% 2.82% 3.57% 3.49% 2.08% 10.79% 7.32% 1.87% 1.99% 3.62% 24.05% 3.00% 2.95% 3.03% 4.77% 3.95% 4.25% 12.65% 24.18% 3.73% 3.66% 2.74% 4.21% 2.46% 1.82% 2.34% 1.35% 0.84% 1.95% 7.04% -2.54% -2.95% -1.54% 0.52% 2.32% 2.80% 3.04% 3.23% 6.61% -99.97% 391244.33% 4.17% 4.49% 4.11% 4.32% 4.41% 4.88% 5.39% 3.95% 4.20% 4.48% 3.99% 4.82% 4.03% 2.75% 9.01% 3.05% 2.74% 2.51% 3.33%  
      cost of revenues
     123,325,000 172,200,000 167,800,000 153,300,000 140,900,000 140,600,000 135,800,000 141,200,000 136,276,000 123,666,000 112,362,000 119,196,000 109,194,000 108,364,000 100,971,000 95,479,000 86,330,000 92,597,000 89,566,000 88,748,000 78,154,000 77,865,000 74,040,000 78,909,000 74,996,000 71,172,000 71,918,000 71,153,000 68,248,000 72,072,000 67,136,000 62,477,000 58,301,000 55,483,000 55,273,000 51,346,000 46,013,000 42,222,000 42,679,000 42,900,000 45,127,000 53,728,000 44,634,000 45,396,000 42,923,000 40,932,000 39,481,000 33,643,000 31,754,000 31,724,000 32,101,000 33,606,000 31,478,000 30,882,000 28,172,000 24,334,000 22,014,000 21,175,000 22,412,000 22,566,000 21,277,000 20,762,000 20,360,000 21,200,000 20,927,000 19,149,000 16,744,000 16,894,000 17,733,000 17,613,000 18,341,000 19,721,000 20,009,000 19,551,000 19,318,000 17,826,000 5,574,098,300 14,005,000 12,606,000 12,926,000 11,959,000 11,001,000 10,836,000 10,490,000 9,412,000 9,189,000 8,842,000 7,941,000 7,796,000 7,627,000 7,716,000 7,603,000 6,983,000 6,996,000 6,937,000 7,096,000 7,532,000 
      net income per share
     -0.023 -0.07 0.01 -0.04 0.15 0.13 0.05 0.02 0.23 0.22 0.25 0.22 0.31 0.18 0.21 0.23 0.24 0.16 0.16 1.9 0.9 1.49 1.61 2.41 2.16 1.74 2.35 2.31 1.63 1.22 1.46 1.28 1.05 0.68 0.69 0.91 0.72 0.48 0.52 0.72 -0.17 -0.47 -0.19 0.44 0.41 0.28 0.34 0.46 0.4 0.3 -0.09 0.17 0.25 -0.25 0.2 0.21 0.09 0.12 0.22 0.18 0.17 0.16 0.14 0.18 0.22 0.24 0.31 0.38 0.34 0.28 0.26 0.51 0.17 0.06 0.1 0.118 0.25 0.12 0.1 0.17 0.06 0.06 0.05 1.07 0.13 0.1 0.08 0.07 0.02 -0.02 -0.05      
      other income
       16,300,000  -2,200,000 -1,600,000 -1,500,000 -1,900,000 3,745,000 465,000 609,000 581,000 -213,000 1,389,000 1,343,000 864,000 909,000 1,546,000 847,000 -50,000 -856,000 -338,000 -474,000                                                    1,891,000 1,862,000 63,566,300 1,852,000 1,610,000 1,426,000    604,000 479,000 311,000  238,000 181,000 65,000 56,000 77,000 123,000 183,000 214,000 239,000 348,000 
      interest expense
                   -3,399,000 -7,718,000 -5,924,500 -7,943,000 -7,877,000                                                                               
      __________________________
                                                                                                      
      interest and other income
                            4,518,000 13,801,000 5,358,000 5,913,000 4,945,000 4,607,000 3,035,000 2,652,000 2,987,000 2,455,000 555,000 605,000 429,000 1,186,000 344,000 159,000 84,000 64,000 42,000 137,000 294,000 271,000 46,000 62,000 137,000 87,000 52,000 83,000 104,000 3,108,000 -1,763,000 -1,069,000 250,000 224,000 194,000 178,000 202,000 145,000 156,000 196,000 238,000 256,750 263,000 322,000 442,000 782,000 951,000 1,243,000 1,938,000 2,220,000 2,072,000                        
      interest and other expense
                            -2,026,000 -482,000 -704,000 -697,000 -732,000 -695,000 -717,000 -728,000 -690,000 -734,000 -2,901,000 -2,693,000 -2,686,000 -2,554,000 -2,498,000 -2,455,000 -2,509,000 -2,351,000 -2,363,000 -2,354,000 -2,343,000 -2,415,000 -2,698,000 -3,753,000 -1,615,000 -1,694,000 -1,736,000 -1,758,000 -1,755,000                                              
      weighted-average outstanding shares — basic
     416.8    406.3    405.3    396,284    392,210    38,073    36,310    36,058   35,893 33,200 32,444 32,406 32,276 32,167 32,186 32,186 32,085 31,950 31,980 31,991 31,831 30,215 31,742 29,061 28,273 27,670 27,758 27,636 27,428 26,533 27,243 26,465 25,128                        18,692      18,247 18,151 17,961  15,981        
      weighted-average outstanding shares — diluted
     420.7    407.8    406.9    397,752    394,160    38,326    36,630    36,448   36,350 33,559 32,814 32,739 32,563 32,436 32,440 32,448 32,382 31,950 31,980 31,991 31,831 30,641 32,075 29,486 28,840 28,212 28,349 28,168 27,428 26,949 27,673 26,465 25,528                        19,269      18,898 18,771 18,699  16,482        
      gross margin
                                     137,284,250 192,050,000 181,880,000 175,207,000 172,298,000 170,489,000 164,190,000 156,839,000 147,882,000 135,350,000 126,023,000 113,624,000 113,173,000 112,124,000 108,227,000 85,433,000 83,856,000 80,577,000 76,898,000 70,427,000 68,605,000 65,119,000 57,051,000 44,295,000 44,150,000 42,654,000 39,715,000 37,052,000 36,908,000 36,382,000 35,478,000 33,893,000 33,708,000 34,441,000 33,320,000 34,476,000 35,196,000 36,144,000 35,137,000 32,543,000 30,831,000 29,789,000 28,476,000 27,005,000 10,198,110,700 26,566,000 26,340,000 24,348,000 23,845,000 23,319,000 22,035,000 20,853,000 20,329,000 19,421,000 18,614,000 18,337,000 17,474,000 16,481,000 15,458,000 14,950,000 9,411,500 13,079,000 12,602,000 11,965,000 10,915,000 
      purchase amortization
                                         4,400,500 5,550,000 5,829,000 6,223,000 6,671,000 7,153,000 6,965,000 7,142,000 7,736,000 8,361,000 9,036,000 3,299,000 3,484,000 3,680,000 3,894,000 4,125,000 4,569,000 4,824,000 3,580,000 634,000 613,000 535,000 546,000 543,000 543,000 540,000 532,000 690,000 882,000 842,000 742,000 946,000 1,157,000 1,236,000 1,266,000 1,221,000 951,750 1,328,000 1,209,000 1,270,000 38,532,600 1,076,000 1,116,000 1,108,000 840,000 1,132,000 1,110,000 1,118,000 820,500 1,085,000 1,071,000 1,126,000 848,250 1,167,000 1,113,000 1,112,000 673,250 902,000 898,000 893,000 2,279,000 
      weighted-average outstanding shares ¾ basic
                                                             23,131 24,973 22,011 20,531 20,330 20,328 20,278    19,479    19,311 19,217          18,485 18,366 18,318              
      weighted-average outstanding shares ¾ diluted
                                                             23,527 25,317 22,426 20,965 20,707 20,688 20,624    19,638    19,508 19,369          19,092 18,868 18,861              
      weighted average outstanding shares ¾ basic
                                                                    20,249 19,780 19,868  19,468 19,372 19,393    19,045 18,952 18,896                      
      weighted average outstanding shares ¾ diluted
                                                                    20,602 19,925 20,084  19,562 19,550 19,604    19,475 19,348 19,207                      
      restructuring charge
                                                                                     554,250 2,217,000                
      weighted average outstanding shares – basic
                                                                                  18,787                    
      weighted average outstanding shares – diluted
                                                                                  19,130                    
      weighted average outstanding shares — basic
                                                                                   18,822                   
      weighted average outstanding shares — diluted
                                                                                   19,261                   
      operating expenses
                                                                                                      
      operating expenses - sum
                                                                                     15,751,000 22,347,000 20,818,000  12,952,250 17,465,000 17,238,000           
      weighted average outstanding shares —basic and diluted
                                                                                               15,856       
      weighted-average outstanding shares
                                                                                                15,814      
      net loss before income taxes
                                                                                                 -1,003,500 -1,125,000  -1,622,000 -4,465,000 
      income tax benefit
                                                                                                     452,000 
      basic and diluted net loss per share
                                                                                                 -0.063 -0.07  -0.1 -0.26 
      weighted-average common shares
                                                                                                  15,777 15,742 15,720 15,657 
      net income before income taxes
                                                                                                   -1,267,000   
      basic and diluted net income per share
                                                                                                   -0.08   
      acquired in-process development
                                                                                                      
      loss on disposal of assets
                                                                                                      
    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 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 2004-09-30 2004-06-30 2004-03-31 2003-12-31 2003-09-30 2003-06-30 2003-03-31 2002-12-31 2002-09-30 2002-06-30 2002-03-31 2001-12-31 2001-09-30 2000-12-31 
                                                                                                         
        assets
                                                                                                         
        current assets:
                                                                                                         
        cash and cash equivalents
      1,215,000,000 1,633,000,000 1,935,300,000 3,628,600,000 3,680,800,000 4,681,000,000 4,937,600,000 4,919,500,000 4,951,600,000 5,215,900,000 5,229,880,000 5,205,295,000 5,055,646,000 4,967,970,000            1,070,731,000 1,389,619,000 1,297,812,000 1,232,817,000 1,100,416,000 1,071,786,000 966,278,000 931,429,000 1,211,463,000 622,995,000 564,638,000 572,472,000 567,223,000 522,099,000 464,151,000 461,720,000 421,818,000 375,509,000 351,781,000 541,771,000 527,012,000 486,195,000 444,857,000 223,443,000 255,953,000 222,938,000 190,101,000 167,394,000 156,027,000 129,462,000 103,338,000 549,096,000 545,280,000 550,740,000 547,617,000 292,252,000 206,405,000 195,358,000 188,290,000 170,206,000 200,738,000 183,361,000 170,624,000 159,982,000 139,150,000 102,500,000 94,706,000  43,262,000 36,434,000 43,118,000  32,769,000 37,250,000 45,093,000 28,065,000 28,007,000 31,017,000 26,515,000 36,807,000 33,251,000 37,295,000 31,240,000 35,643,000 23,294,000 30,507,000 24,910,000 25,546,000 27,496,000 29,843,000 31,154,000  41,468,000  
        restricted cash
      101,000,000 100,000,000 99,500,000 98,400,000 97,400,000                                                                                               
        accounts receivable
      301,000,000 263,000,000 273,700,000 231,000,000 232,300,000 210,700,000 202,400,000 226,200,000 218,700,000 213,200,000 213,742,000 196,255,000 196,655,000 166,140,000 157,104,000 161,811,000 148,744,000 138,191,000 128,700,000 122,702,000 124,361,000 119,059,000 119,219,000 127,030,000 120,559,000        68,914,000 60,900,000 60,871,000 51,512,000 49,557,000 48,537,000 47,461,000 45,890,000 47,315,000 40,276,000 51,066,000 54,382,000 45,699,000 38,694,000                                                      
        less: allowance for credit losses
      -32,000,000 -29,000,000 -29,900,000 -27,200,000 -25,300,000 -22,800,000 -23,600,000 -22,400,000 -21,300,000 -23,200,000 -20,911,000 -15,042,000 -14,897,000 -12,195,000 -9,334,000 -9,638,000 -13,766,000 -13,374,000 -13,049,000 -14,433,000 -14,563,000 -15,110,000 -14,205,000 -13,363,000 -8,311,000                                                                           
        income taxes receivable
      18,000,000 18,000,000                                                                                                  
        prepaid expenses and other current assets
      103,000,000 134,000,000 126,500,000 92,600,000 82,500,000 81,300,000 78,700,000 83,900,000 67,200,000 70,200,000 76,013,000 58,376,000 60,232,000 63,952,000 75,074,000 55,194,000 36,183,000 36,182,000 37,599,000 34,753,000 22,233,000 28,651,000 34,414,000 28,576,000 30,219,000 36,194,000 23,778,000 20,367,000 20,713,000 23,690,000 25,203,000 39,723,000 31,661,000 15,572,000 16,215,000 19,837,000 12,005,000 11,602,000 11,663,000 12,894,000 9,656,000 10,209,000 10,350,000 11,351,000 10,283,000 9,736,000 9,754,000 10,698,000 8,113,000 6,597,000 10,021,000 8,452,000 9,769,000 9,560,000 7,999,000 7,736,000 6,009,000 5,722,000 6,404,000 5,693,000 4,179,000 5,809,000 5,718,000 4,414,000 7,649,000 4,051,000 3,152,000 3,013,000 2,903,000 4,152,000 2,717,000 3,371,000  4,256,000 3,413,000 4,028,000  3,269,000 1,975,000 3,376,000 2,205,000 3,000,000 2,346,000 3,031,000 1,916,000 2,533,000 2,778,000 2,343,000 1,981,000 1,660,000 1,579,000 1,723,000 1,567,000 470,000 380,000 530,000  781,000  
        total current assets
      1,706,000,000 2,119,000,000 2,405,100,000 4,331,500,000 4,353,300,000 4,950,200,000 5,195,100,000 5,207,200,000 5,216,200,000 5,476,100,000 5,498,724,000 5,444,884,000 5,297,636,000 5,185,867,000 5,006,587,000 4,180,761,000 4,100,258,000 3,988,125,000 3,914,837,000 3,817,931,000 3,822,327,000 3,888,512,000 4,007,233,000 3,690,648,000 2,070,390,000 1,199,165,000 1,504,722,000 1,413,762,000 1,346,371,000 1,213,298,000 1,179,268,000 1,075,985,000 1,032,004,000 1,287,935,000 700,081,000 635,987,000 634,163,000 627,491,000 583,443,000 524,219,000 519,937,000 472,733,000 476,474,000 450,348,000 627,704,000 599,811,000 562,752,000 531,014,000 303,751,000 308,466,000 277,570,000 244,698,000 225,465,000 199,563,000 184,333,000 159,609,000 584,908,000 583,183,000 589,381,000 578,622,000 326,762,000 239,173,000 226,477,000 219,397,000 212,580,000 244,610,000 231,447,000 223,545,000 212,483,000 200,287,000 187,222,000 178,737,000  187,122,000 174,761,000 172,383,000  170,513,000 163,084,000 157,480,000 146,538,000 137,457,000 125,401,000 125,090,000 127,083,000 119,332,000 113,000,000 110,286,000 103,738,000 42,582,000 39,039,000 35,161,000 51,883,000 49,454,000 48,854,000 48,455,000  48,348,000  
        deferred income taxes
      44,000,000 47,000,000 65,900,000 55,400,000 49,800,000 30,600,000 4,300,000 4,300,000 4,300,000 4,300,000 9,722,000 9,724,000 9,722,000 9,722,000 5,032,000 5,034,000 5,035,000 5,034,000 1,975,000 3,034,000 3,633,000 4,983,000 3,891,000 4,372,000 4,762,000 5,408,000 4,426,000 5,670,000 6,451,000 7,469,000 2,679,000 4,046,000 4,579,000 5,431,000 6,477,000 7,834,000 8,479,000 7,273,000 8,153,000 8,581,000 8,890,000 9,107,000 11,262,000 14,069,000 33,539,000 30,349,000 26,532,000 28,116,000 31,390,000 22,506,000 17,115,000 16,721,000 19,201,000 9,256,000 15,145,000 19,487,000 11,166,000 11,227,000 8,906,000 7,519,000 5,494,000 5,203,000 4,463,000 3,852,000 3,279,000 2,757,000 2,546,000 2,164,000 2,036,000 1,067,000 4,551,000 2,097,000  7,904,000 7,904,000 7,904,000  4,476,000 4,475,000 4,475,000 4,475,000 4,177,000 4,177,000 4,177,000 4,177,000 3,168,000 3,306,000 3,067,000            
        property and equipment
      1,367,000,000 1,323,000,000 1,269,600,000 1,206,700,000 1,097,600,000 1,014,900,000 937,800,000 853,200,000 791,100,000 472,200,000 403,195,000 359,455,000 330,836,000 321,250,000 306,319,000 298,361,000 283,718,000 271,431,000 238,866,000 239,125,000 239,480,000 126,325,000 127,280,000 104,316,000 106,409,000 107,529,000 107,989,000 84,518,000 85,978,000 83,303,000 81,937,000 84,648,000 83,401,000 84,496,000 84,326,000 85,779,000 85,504,000 87,568,000 85,366,000 86,508,000 85,962,000 88,311,000 87,627,000 85,442,000 79,123,000 73,753,000 70,675,000 64,640,000 57,338,000 57,719,000 55,703,000 49,693,000 48,653,000 46,308,000 42,962,000 43,225,000 38,584,000 37,571,000 36,780,000 37,146,000 36,886,000 69,921,000    16,579,000 15,274,000 15,801,000 16,876,000 19,296,000 21,286,000 22,714,000  21,302,000 19,968,000 19,616,000  16,851,000 14,447,000 14,179,000 15,144,000 16,146,000 16,124,000 14,412,000 13,489,000 33,490,000 32,562,000 28,644,000 10,254,000 28,704,000 28,027,000 27,406,000  25,425,000 24,755,000 23,711,000  22,782,000  
        lease right-of-use assets
      120,000,000 123,000,000 111,300,000 93,800,000 96,700,000 103,000,000 79,200,000 69,300,000 74,800,000 79,800,000 85,758,000 79,491,000 76,174,000 80,392,000 94,262,000 98,495,000 95,555,000 100,680,000 105,964,000 119,290,000 90,949,000 108,740,000 106,320,000 112,641,000 112,811,000 115,084,000 105,516,000 111,004,000 112,042,000                                                                       
        goodwill
      4,975,000,000 4,944,000,000 4,915,400,000 3,689,600,000 3,673,200,000 2,527,600,000 2,396,600,000 2,383,600,000 2,383,700,000 2,386,200,000 2,315,313,000 2,321,205,000 2,318,133,000 2,314,759,000 2,301,739,000 2,314,176,000 2,319,785,000 2,321,015,000 2,293,514,000 2,294,452,000 2,210,976,000 2,235,999,000 2,015,079,000 2,009,117,000 1,873,987,000 1,882,020,000 1,616,538,000 1,617,853,000 1,612,065,000 1,611,535,000 1,548,976,000 1,549,517,000 1,551,248,000 1,283,457,000 1,283,190,000 1,280,271,000 1,263,484,000 1,254,866,000 1,256,353,000 1,256,940,000 1,252,484,000 1,252,945,000 1,249,945,000 1,246,789,000 1,137,707,000 1,138,805,000 1,139,917,000 1,141,187,000 718,824,000 718,587,000 718,039,000 716,580,000 716,569,000 718,078,000 718,080,000 717,212,000 92,624,000 91,784,000 79,849,000 80,466,000 80,488,000 79,602,000 80,134,000 78,973,000 78,975,000 70,218,000 57,394,000 53,911,000 54,328,000 60,143,000 62,942,000 61,819,000  63,328,000 62,618,000 61,600,000  44,722,000 44,292,000 43,708,000 43,563,000 44,444,000 44,044,000 44,373,000 41,937,000 41,245,000 41,270,000 40,821,000 37,351,000 36,678,000 36,577,000 36,121,000 26,177,000 26,177,000 26,177,000 25,745,000    
        intangible assets
      1,731,000,000 1,771,000,000 1,844,400,000 915,600,000 957,200,000 433,200,000 324,700,000 342,500,000 365,000,000 313,700,000 275,095,000 295,022,000 312,420,000 329,306,000 343,232,000 385,245,000 409,326,000 435,662,000 447,900,000 476,179,000 450,341,000 426,745,000 414,608,000 437,550,000 400,689,000 421,196,000 259,444,000 272,177,000 275,750,000 288,911,000 285,958,000 299,611,000 313,861,000 182,892,000 191,178,000 198,097,000 191,472,000 195,965,000 207,113,000 218,501,000 226,392,000 238,318,000 250,813,000 263,831,000 226,699,000 241,622,000                                                  34,595,000    
        deferred commission costs
      188,000,000 184,000,000 178,000,000 184,400,000 173,900,000 169,600,000 173,000,000 178,900,000 179,000,000 167,700,000 165,846,000 162,391,000 152,929,000 142,482,000 129,815,000 119,778,000 110,083,000 101,879,000 96,303,000 94,387,000 93,056,000 93,274,000 93,006,000 91,712,000 91,000,000 89,374,000 85,623,000 83,874,000 77,375,000 76,031,000 76,062,000 76,159,000 75,201,000                                                                   
        deposits and other assets
      33,000,000 27,000,000 30,200,000 30,100,000 26,400,000 27,700,000 26,000,000 26,300,000 18,400,000 17,700,000 15,997,000 17,497,000 17,057,000 16,687,000 16,872,000 16,893,000 22,399,000 21,762,000 16,971,000 16,230,000 16,223,000 15,856,000 15,102,000 13,868,000 9,743,000 9,232,000 6,155,000 6,762,000 7,274,000 7,432,000 7,394,000 7,660,000 11,755,000 6,179,000 5,392,000 2,099,000 2,101,000 1,948,000 2,248,000 2,579,000 2,404,000 2,650,000 2,933,000 3,243,000 2,747,000 2,676,000 2,045,000 2,120,000 1,818,000 1,855,000 2,044,000 2,023,000 1,900,000 2,274,000 2,160,000 2,178,000 3,456,000 3,159,000 2,487,000 2,649,000 2,679,000 2,989,000 3,017,000 2,173,000 2,119,000 1,828,000 1,598,000 1,470,000 1,544,000 1,642,000 1,597,000 1,485,000          3,604,000 2,385,000 2,458,000                
        total assets
      10,164,000,000 10,538,000,000 10,819,900,000 10,507,100,000 10,428,100,000 9,256,800,000 9,138,700,000 9,067,300,000 9,034,500,000 8,919,700,000 8,771,655,000 8,691,674,000 8,516,912,000 8,402,470,000 8,205,863,000 7,420,748,000 7,357,442,000 7,256,871,000 7,131,316,000 7,075,614,000 6,941,971,000 6,915,420,000 6,797,325,000 6,479,030,000 4,684,597,000 3,853,986,000 3,715,391,000 3,620,598,000 3,548,284,000 3,312,957,000 3,207,222,000 3,122,574,000 3,095,100,000 2,873,441,000 2,280,596,000 2,220,019,000 2,195,155,000 2,185,063,000 2,152,587,000 2,107,234,000 2,106,013,000 2,079,571,000 2,090,736,000 2,073,947,000 2,099,701,000 2,083,682,000 2,064,341,000 2,046,394,000 1,244,796,000 1,256,982,000 1,230,374,000 1,197,018,000 1,183,858,000 1,165,139,000 1,154,659,000 1,141,287,000 773,751,000 771,035,000 764,753,000 757,856,000 506,479,000 439,648,000 427,899,000 415,475,000 407,864,000 392,335,000 353,908,000 341,982,000 334,384,000 334,916,000 329,503,000 323,514,000 321,843 301,739,000 291,959,000 290,852,000 275,437 268,383,000 260,640,000 255,937,000 248,059,000 244,825,000 233,647,000 235,125,000 232,691,000 202,578,000 197,953,000 191,731,000 183,900,000 123,480,000 120,990,000 118,885,000 118,907,000 118,211,000 119,226,000 120,205,000 123,646,000 127,331,000 145,871,000 
        liabilities and stockholders’ equity
                                                                                                         
        current liabilities:
                                                                                                         
        accounts payable
      39,000,000 42,000,000 46,500,000 51,500,000 38,700,000 47,000,000 84,400,000 101,000,000 113,600,000 23,100,000 25,866,000 61,546,000 31,664,000 28,460,000 31,435,000 32,132,000 19,191,000 22,244,000 17,487,000 16,376,000 16,870,000 15,732,000 20,266,000 26,864,000 22,486,000 7,640,000 8,082,000 6,996,000 7,919,000 6,327,000 10,114,000 9,394,000 7,845,000 9,262,000 11,323,000 16,694,000 16,947,000 11,478,000 9,861,000 14,038,000 6,654,000 9,673,000 14,210,000 6,778,000 6,599,000 8,608,000 7,604,000 7,543,000 3,943,000 4,939,000 6,347,000 4,450,000 3,923,000 6,234,000 3,718,000 6,307,000 4,171,000 6,010,000 4,367,000 4,127,000 3,351,000 3,123,000 1,893,000 3,268,000 3,208,000 4,555,000 1,806,000 1,976,000 1,636,000 1,384,000 1,754,000 1,883,000         1,484,000    1,876,000    1,235,000    1,596,000       
        accrued wages and commissions
      126,000,000 145,000,000 145,200,000 135,900,000 96,500,000 133,300,000 105,500,000 110,200,000 90,700,000 117,800,000 91,357,000 100,915,000 89,352,000 104,988,000 83,041,000 84,545,000 59,337,000 81,794,000 82,905,000 76,014,000 68,590,000 80,998,000 63,341,000 56,748,000 49,302,000 53,087,000 51,557,000 47,394,000 49,264,000 45,588,000 50,483,000 45,593,000 51,037,000 54,104,000 34,661,000 27,360,000 27,023,000 33,803,000 32,443,000 22,349,000 23,205,000 31,045,000 30,197,000 24,666,000 18,899,000 23,155,000 21,656,000 20,247,000 12,426,000 20,104,000 18,256,000 18,686,000 14,524,000 23,831,000 21,255,000 17,569,000 9,827,000 16,695,000 12,326,000 11,478,000 7,581,000 12,465,000 8,864,000 8,606,000 6,941,000 8,537,000 6,140,000 6,412,000 7,217,000 7,006,000 4,957,000 5,894,000  7,951,000 5,418,000 7,531,000     4,640,000    4,193,000    3,613,000    4,079,000       
        accrued expenses
      216,000,000 203,000,000 217,000,000 220,300,000 235,900,000     163,000,000 156,009,000 115,654,000 86,669,000 89,113,000 77,275,000 91,168,000 78,923,000 81,676,000 86,788,000 89,284,000 58,290,000 110,305,000 54,753,000 45,726,000 40,310,000 38,680,000 41,816,000 48,932,000 36,291,000 29,821,000 33,500,000 37,343,000 40,647,000 22,193,000 33,073,000 36,201,000 32,302,000 31,092,000 33,252,000 38,568,000 41,472,000 31,469,000 39,272,000 48,166,000 48,551,000 27,001,000 30,107,000 29,530,000 26,208,000 23,200,000 23,498,000 23,322,000 22,595,000 19,002,000 19,608,000 18,781,000 14,819,000 12,761,000 18,415,000 17,466,000 17,712,000 18,411,000       7,754,000     11,540,000 10,710,000 10,628,000     8,275,000    6,847,000    4,797,000    4,449,000       
        litigation accrual
      99,000,000 99,000,000 98,800,000 96,700,000 95,000,000                                                                                               
        income taxes payable
      1,000,000 1,000,000 9,500,000 1,000,000 28,500,000 23,200,000 8,900,000 100,000 12,900,000 7,700,000 2,061,000 11,100,000 39,481,000 10,438,000 39,000 1,841,000 72,375,000 31,236,000 11,828,000 25,527,000 28,757,000 16,316,000 256,000 22,764,000 12,183,000 10,705,000 9,116,000 8,551,000 22,536,000 14,288,000 1,269,000 94,000 9,257,000 8,166,000 9,328,000  14,559,000 3,814,000 9,079,000 6,805,000 8,232,000 6,692,000 11,702,000 4,775,000 4,736,000     2,362,000 2,915,000 2,865,000 2,844,000    2,614,000 978,000 7,974,000 7,156,000 14,831,000 1,770,000 1,882,000 1,863,000 1,845,000 856,000 1,703,000 963,000 1,907,000 3,905,000 4,372,000 5,167,000                            
        lease liabilities
      28,000,000 28,000,000 28,400,000 25,800,000 28,200,000 32,000,000 38,900,000 41,200,000 44,000,000 40,000,000 40,187,000 40,329,000 36,050,000 36,049,000 34,063,000 35,426,000 32,620,000 26,268,000 29,878,000 28,779,000 27,932,000 32,648,000 31,494,000 30,905,000 27,681,000 29,670,000 27,137,000 27,097,000 26,062,000                                                                       
        deferred revenue
      237,000,000 205,000,000 201,600,000 187,400,000 181,400,000 137,100,000 113,600,000 122,900,000 117,100,000 104,200,000 97,583,000 113,231,000 117,805,000 103,567,000 100,053,000 104,838,000 107,749,000 95,471,000 92,631,000 92,698,000 89,696,000 74,851,000 75,001,000 80,358,000 84,717,000 67,274,000 60,328,000 58,290,000 56,155,000 51,459,000 50,195,000 46,341,000 49,468,000 45,686,000 45,568,000 43,167,000 41,977,000 39,164,000 41,864,000 41,262,000 43,105,000 42,138,000 43,910,000 39,185,000 39,286,000 38,003,000 38,311,000 37,443,000 35,926,000 34,362,000 34,904,000 34,066,000 36,654,000 32,548,000 32,661,000 28,610,000 23,234,000 22,271,000 18,471,000 17,466,000 18,845,000 16,895,000 16,251,000 14,918,000 16,766,000 14,213,000 9,075,000 9,760,000 9,442,000 10,180,000 11,361,000 10,723,000  10,594,000 10,923,000 12,256,000  8,761,000 8,535,000 9,209,000 7,638,000 7,118,000 7,290,000 8,120,000 6,292,000 6,319,000 6,086,000 6,692,000 5,886,000 5,437,000 5,094,000 6,505,000 4,766,000 4,458,000 4,508,000 4,843,000  4,754,000  
        other current liabilities
      31,000,000 23,000,000 23,500,000 23,800,000 20,200,000                                                                                               
        total current liabilities
      777,000,000 746,000,000 770,500,000 742,400,000 724,400,000 552,300,000 539,400,000 561,700,000 573,800,000 455,800,000 413,063,000 442,775,000 401,021,000 372,615,000 325,906,000 349,950,000 370,195,000 338,689,000 321,517,000 328,678,000 290,135,000 330,850,000 245,111,000 263,365,000 236,679,000 207,056,000 198,036,000 197,260,000 198,227,000 154,159,000 153,470,000 145,920,000 165,643,000 146,666,000 176,587,000 150,901,000 144,091,000 154,946,000 153,459,000 132,830,000 143,342,000 135,281,000 162,918,000 141,318,000 135,858,000 119,290,000 120,201,000 117,286,000 107,276,000 111,553,000 107,403,000 102,735,000 97,719,000 101,638,000 93,028,000 85,261,000 57,743,000 61,782,000 64,606,000 60,216,000 64,843,000 54,926,000 49,739,000 45,908,000 43,660,000 39,381,000 27,453,000 28,969,000 29,136,000 33,913,000 33,922,000 35,557,000  33,870,000 30,801,000 33,433,000  25,168,000 24,008,000 24,967,000 22,037,000 22,492,000 17,477,000 19,715,000 19,208,000 19,024,000 17,841,000 16,367,000 15,531,000 15,579,000 14,978,000 15,555,000 14,890,000 13,554,000 13,732,000 13,727,000  16,677,000  
        long-term debt
      994,000,000 993,000,000 992,900,000 992,500,000 992,200,000 991,900,000 991,500,000 991,200,000 990,800,000 990,500,000 990,185,000 989,858,000 989,533,000 989,210,000 988,890,000 988,572,000 988,257,000 987,944,000 987,633,000 987,325,000 987,018,000 986,715,000 986,413,000 745,000,000 745,000,000                                                                           
        lease and other long-term liabilities
      168,000,000 163,000,000 156,700,000 136,200,000 121,300,000 126,500,000 80,000,000 69,600,000 75,100,000 79,900,000 77,500,000 71,711,000 72,095,000 80,321,000 88,941,000 96,104,000 97,428,000 107,414,000 109,156,000 129,925,000 106,425,000 124,223,000 129,607,000 131,672,000 130,697,000 133,720,000 117,897,000 124,275,000 127,318,000                                                                       
        total liabilities
      2,213,000,000 2,167,000,000 2,196,000,000 1,905,700,000 1,871,900,000 1,703,300,000 1,647,600,000 1,671,600,000 1,691,900,000 1,581,100,000 1,561,493,000 1,590,602,000 1,551,303,000 1,532,349,000 1,498,951,000 1,536,395,000 1,560,144,000 1,545,199,000 1,527,893,000 1,548,387,000 1,495,046,000 1,540,061,000 1,479,267,000 1,254,709,000 1,221,786,000 448,393,000 416,225,000 416,527,000 419,670,000 291,015,000 278,908,000 271,956,000 294,136,000 222,191,000 518,169,000 503,284,000 511,393,000 530,850,000 533,889,000 521,293,000 540,537,000 535,791,000 580,778,000 567,794,000 584,743,000 570,136,000 571,968,000 575,153,000 315,003,000 329,120,000 331,055,000 330,422,000 333,207,000 338,796,000 338,808,000 338,695,000 107,046,000 111,858,000 115,063,000 111,992,000 117,081,000  51,621,000 47,771,000 45,505,000 41,088,000 29,219,000      40,038    25,327                    15,627,000  19,497,000 
        stockholders' equity attributable to costar group
      7,913,000,000 8,334,000,000 8,615,800,000                                                                                                 
        equity attributable to nci
      38,000,000 37,000,000 8,100,000                                                                                                 
        total equity
      7,951,000,000 8,371,000,000 8,623,900,000                                                                                                 
        total liabilities and stockholders' equity
      10,164,000,000  10,819,900,000 10,507,100,000 10,428,100,000  9,138,700,000 9,067,300,000 9,034,500,000  8,771,655,000 8,691,674,000 8,516,912,000  8,205,863,000 7,420,748,000                                                                                    
        see accompanying notes.
                                                                                                         
        stockholders’ equity:
                                                                                                         
        preferred stock, 0.01 par value...
                                                                                                         
        common stock, 0.01 par value...
       4,000,000    4,100,000    4,100,000    4,066,000    3,946,000    394,000    366,000    364,000    361,000    326,000    325,000    323,000    288,000    283,000    254,000    208,000       197,000            187,000    183,000    179,000           
        additional paid-in capital
       6,410,000,000    5,231,900,000    5,147,800,000    5,065,511,000    4,253,318,000    4,208,252,000    2,473,338,000    2,419,812,000    2,339,253,000    1,471,127,000    1,440,321,000    1,405,414,000    863,780,000    792,988,000    637,816,000    374,981,000       333,983,000            295,920,000    283,206,000    267,183,000    205,348,000       
        treasury stock
       -510,000,000                                                                                                  
        accumulated other comprehensive income
       80,000,000                                                                   -13,796,000            1,348,000    3,959,000    2,396,000           
        retained earnings
       2,350,000,000    2,343,000,000    2,204,300,000    1,829,619,000    1,460,166,000    1,167,602,000    940,474,000    613,454,000    320,656,000    195,799,000    110,728,000    114,193,000    69,324,000    39,590,000    29,675,000    15,019,000                                      
        total liabilities and stockholders’ equity
       10,538,000,000    9,256,800,000    8,919,700,000    8,402,470,000   7,357,442,000 7,256,871,000 7,131,316,000 7,075,614,000 6,941,971,000 6,915,420,000 6,797,325,000 6,479,030,000 4,684,597,000 3,853,986,000 3,715,391,000 3,620,598,000 3,548,284,000 3,312,957,000 3,207,222,000 3,122,574,000 3,095,100,000 2,873,441,000 2,280,596,000 2,220,019,000 2,195,155,000 2,185,063,000 2,152,587,000 2,107,234,000 2,106,013,000 2,079,571,000 2,090,736,000 2,073,947,000 2,099,701,000 2,083,682,000 2,064,341,000 2,046,394,000 1,244,796,000 1,256,982,000 1,230,374,000 1,197,018,000 1,183,858,000 1,165,139,000 1,154,659,000 1,141,287,000 773,751,000 771,035,000 764,753,000 757,856,000 506,479,000 439,648,000 427,899,000 415,475,000 407,864,000 392,335,000 353,908,000 341,982,000 334,384,000 334,916,000 329,503,000 323,514,000  301,739,000 291,959,000 290,852,000  268,383,000 260,640,000 255,937,000 248,059,000 244,825,000 233,647,000 235,125,000 232,691,000 202,578,000 197,953,000 191,731,000 183,900,000 123,480,000 120,990,000 118,885,000 118,907,000 118,211,000 119,226,000 120,205,000  127,331,000  
        equity investment
         308,100,000 285,600,000                                                                                               
        total stockholders' equity
         8,601,400,000 8,556,200,000  7,491,100,000 7,395,700,000 7,342,600,000  7,210,162,000 7,101,072,000 6,965,609,000  6,706,912,000 5,884,353,000 5,797,298,000  5,603,423,000 5,527,227,000 5,446,925,000  5,318,058,000 5,224,321,000                                                                            
        accrued expenses and other current liabilities
           179,700,000 188,100,000 186,300,000 195,500,000                                                                                           
        accumulated other comprehensive loss
           -25,500,000    -17,600,000    -29,075,000    -5,758,000    -889,000    -8,585,000    -11,688,000    -9,020,000    -13,039,000    -7,594,000    -6,384,000    -5,530,000    -6,518,000    -8,568,000    -8,706,000                                      
        total stockholders’ equity
           7,553,500,000    7,338,600,000    6,870,121,000    5,711,672,000    5,375,359,000   3,462,811,000 3,405,593,000 3,299,166,000 3,204,071,000 3,128,614,000 3,021,942,000 2,928,314,000 2,850,618,000 2,800,964,000 2,651,250,000 1,762,427,000 1,716,735,000 1,683,762,000 1,654,213,000 1,618,698,000 1,585,941,000 1,565,476,000 1,543,780,000 1,509,958,000 1,506,153,000 1,514,958,000 1,513,546,000 1,492,373,000 1,471,241,000 929,793,000 927,862,000 899,319,000 866,596,000 850,651,000 826,343,000 815,851,000 802,592,000 666,705,000 659,177,000 649,690,000 645,864,000 389,398,000 381,502,000 376,278,000 367,704,000 362,359,000 351,247,000 324,689,000 311,165,000 303,421,000 300,665,000 295,176,000 286,868,000  266,927,000 259,355,000 254,922,000  242,345,000 235,598,000 229,880,000 224,796,000 220,464,000 214,096,000 213,080,000 210,944,000 180,386,000 176,806,000 172,297,000 168,369,000 107,901,000 106,012,000 103,330,000 104,017,000       
        income tax receivable
            2,000,000 2,000,000 2,000,000 2,000,000 2,005,000 2,005,000 2,005,000 2,005,000 9,278,000 9,278,000 11,283,000 11,283,000 14,986,000 14,986,000 14,986,000 14,986,000 14,806,000 14,806,000 14,806,000 14,908,000 14,908,000 14,908,000 14,908,000 14,908,000 14,878,000 14,878,000 12,981,000    129,000 129,000 1,049,000 154,000 154,000 430,000 1,027,000 1,027,000 1,027,000 1,027,000     1,796,000 1,796,000 1,796,000 5,357,000 6,560,000 5,727,000  850,000 852,000 852,000 4,940,000 4,940,000                                      
        cash, cash equivalents and restricted cash
                    4,774,465,000 3,964,116,000 3,929,097,000 3,827,126,000 3,761,587,000 3,674,909,000 3,690,296,000 3,755,912,000 3,867,805,000 3,548,405,000 1,927,923,000                                                                           
        long-term investments
                               10,070,000 10,070,000 10,070,000 10,070,000 10,070,000 10,070,000 10,070,000 10,070,000 10,070,000 9,952,000 9,952,000 9,952,000 9,952,000 9,911,000 9,906,000 9,944,000 15,507,000 15,507,000 16,049,000 16,669,000 17,151,000 21,081,000 21,639,000 22,168,000 21,990,000 21,675,000 21,675,000 21,675,000 21,662,000 21,561,000 24,976,000 24,534,000 24,584,000 28,414,000 29,014,000 29,114,000 29,189,000 29,349,000 29,449,000 29,549,000 29,939,000 30,110,000 29,340,000 29,340,000 30,203,000 30,878,000 31,532,000                            
        accounts receivables
                               92,240,000 91,325,000 95,583,000 92,841,000 89,192,000 82,279,000 69,984,000               39,051,000 39,661,000 32,286,000 20,761,000 22,960,000 24,808,000 24,420,000 16,392,000 21,397,000 19,523,000 16,352,000 16,589,000 18,909,000 13,336,000 16,240,000 13,094,000 13,673,000 10,554,000 12,746,000 13,811,000 12,106,000 14,236,000 12,294,000 12,113,000 12,570,000 11,708,000  10,719,000 8,969,000 10,103,000  7,872,000 6,405,000 7,375,000 5,673,000 5,519,000 5,476,000 4,991,000 3,921,000 3,490,000 2,904,000 3,304,000 4,308,000           
        deferred gain on the sale of building
                                   2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000 2,523,000                                       
        deferred rent
                                   4,153,000 5,386,000 4,632,000 4,866,000 4,732,000 3,201,000 3,011,000 1,799,000 1,206,000 2,612,000 2,278,000 1,374,000 1,687,000 1,104,000 30,131,000 27,479,000 27,032,000 25,961,000 24,877,000 23,353,000 22,828,000 22,713,000 19,670,000 19,357,000  138,000 533,000 555,000 544,000 530,000 17,374,000 17,216,000 4,032,000       1,180,000                               
        commitments and contingencies
                                                                                                         
        other long-term liabilities
                                   4,000,000                        1,030,000 977,000 926,000                                            
        current portion of long-term debt
                                        36,910,000 21,945,000 6,961,000 31,866,000 21,825,000 11,812,000 16,777,000 16,746,000 20,000,000 20,000,000 20,000,000 20,000,000 20,000,000 20,000,000 26,250,000 24,063,000 21,875,000 19,688,000 17,500,000 17,500,000 13,125,000 10,938,000                                            
        long-term debt, less current portion
                                        268,586,000 282,881,000 297,150,000 306,473,000 315,694,000 324,910,000 334,146,000 338,366,000 350,000,000 355,000,000 360,000,000 365,000,000 370,000,000 375,000,000 122,500,000 129,062,000 135,625,000 142,187,000 148,750,000 153,125,000 157,500,000 161,875,000                                            
        short-term investments
                                            1,171,000 1,130,000 1,092,000             37,000 817,000 820,000 2,285,000 3,515,000 3,570,000 3,605,000 3,657,000 3,722,000 7,265,000 12,287,000 18,700,000 23,253,000 30,282,000 33,508,000 35,268,000 43,805,000 64,884,000 66,855,000  120,981,000 118,041,000 107,230,000  122,127,000 112,979,000 97,161,000 106,120,000 96,754,000 82,385,000 86,376,000 80,262,000 80,058,000 70,023,000 73,399,000 61,806,000 12,617,000 1,094,000 1,405,000 1,598,000 15,122,000 12,240,000 10,489,000    
        deferred and other income taxes
                                                35,246,000 28,509,000 25,604,000 20,007,000 24,394,000 32,436,000 37,362,000                                                   
        debt issuance costs
                                                3,276,000 3,298,000 3,320,000 3,335,000 3,358,000 3,362,000 2,547,000 2,649,000 2,740,000 2,820,000 2,885,000 2,934,000 2,953,000 2,978,000                                            
        intangibles and other assets
                                                    257,177,000 274,200,000 137,168,000 144,472,000 150,800,000 157,126,000 163,672,000 170,632,000 178,205,000 185,992,000 19,537,000 20,530,000 16,387,000 17,457,000 17,898,000 18,774,000 19,965,000 20,516,000 21,607,000 22,607,000 14,898,000 14,646,000 16,421,000 20,639,000 23,872,000 23,892,000  27,157,000 29,221,000 30,847,000  21,916,000 22,277,000 22,306,000 22,847,000    27,657,000 28,842,000 30,099,000 29,898,000 31,590,000 32,992,000 34,997,000 36,634,000 29,527,000 31,331,000 32,847,000     
        fixed assets
                                                                    64,973,000 61,083,000 60,684,000                                   
        accrued expenses and deferred rent
                                                                    22,731,000 19,116,000 16,745,000 11,220,000 10,432,000 9,858,000  11,438,000 11,478,000 11,890,000                            
        accumulated deficit
                                                                          -16,963,000            -69,947,000    -76,404,000    -101,389,000    -101,489,000       
        cash, cash equivalents, short-term and long-term investments
                                                                              187,426    158,148                       
        working capital
                                                                              167,441    154,606                    33,315,000  35,601,000 
        stockholders’ equity
                                                                              281,805    250,110                 104,657,000 105,494,000 106,478,000 108,019,000 110,202,000 126,374,000 
        deposits
                                                                               2,336,000 1,723,000 1,287,000  1,557,000 1,107,000 1,081,000 1,277,000    1,038,000 995,000 1,069,000 992,000 967,000 914,000 290,000 280,000 272,000 266,000 281,000 325,000  291,000  
        accounts payable and deferred rent
                                                                               3,785,000 3,750,000 3,018,000                        
        accounts payable and accrued expenses
                                                                                   16,407,000 15,473,000 15,758,000  15,374,000 10,187,000 11,595,000  12,705,000 11,755,000 9,675,000  10,142,000 9,884,000 9,050,000  9,096,000 9,224,000 8,884,000  11,923,000  
        unearned compensation
                                                                                      -2,712,000                   
        intangibles
                                                                                       23,957,000 25,971,000 27,850,000                
        accumulated depreciation
                                                                                           -21,326,000 -20,047,000 -18,910,000  -18,390,000 -17,940,000 -16,717,000 -15,510,000   -12,626,000  -10,078,000  
        cash held for acquisition
                                                                                                  16,386,000       
        property and equipment:
                                                                                                         
        leasehold improvements
                                                                                                  3,239,000       
        furniture, office equipment and research vehicles
                                                                                                  7,351,000       
        computer hardware and software
                                                                                                  15,968,000       
        property and equipment: - sum
                                                                                                  26,558,000       
        preferred stock, .01 par value...
                                                                                                         
        accumulated depreciation and amortization
                                                                                                   -14,442,000 -13,688,000     
        consolidated balance sheet data:
                                                                                                         
        cash, cash equivalents, cash held for acquisition and short-term investments
                                                                                                      42,002,000  47,101,000 
        goodwill, intangible and other assets
                                                                                                       65,988,000  
        deferred taxes
                                                                                                       452,000  
      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 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 2004-09-30 2004-06-30 2004-03-31 2003-12-31 2003-09-30 2003-06-30 2003-03-31 2002-12-31 2002-03-31 
                                                                                                      
          operating activities:
                                                                                                      
          net income
        3,000,000 46,500,000 -30,900,000 6,200,000 -14,800,000 59,800,000 53,000,000 19,200,000 6,700,000 96,475,000 90,574,000 100,520,000 87,131,000 124,372,000 72,290,000 83,473,000 89,318,000 92,900,000 64,304,000 61,148,000 74,212,000 35,789,000 58,186,000 60,360,000 72,793,000 87,927,000 78,619,000 63,248,000 85,169,000 83,509,000 58,759,000 43,835,000 52,231,000 44,204,000 34,177,000 22,184,000 22,130,000 29,573,000 23,201,000 15,576,000 16,721,000 22,990,000 -5,362,000 -14,966,000 -6,127,000 13,923,000 12,957,000 8,249,000 9,740,000 12,799,000 11,052,000 8,293,000 -2,410,000 4,714,000 6,779,000 -6,710,000 5,132,000 5,176,000 2,311,000 2,637,000 4,532,000 3,767,000 3,382,000 3,251,000 2,889,000 3,646,000 4,325,000 4,616,000 6,106,000 7,501,000 6,645,000 5,435,000 5,042,000 9,712,000 3,250,000 1,175,000 1,814,000 4,698,000 2,304,000 1,860,000 3,203,000 1,137,000 1,143,000 974,000 19,401,000 2,367,000 1,736,000 1,481,000       
          adjustments to reconcile net income to net cash from operating activities:
                                                                                                      
          depreciation and amortization
        82,000,000 81,000,000 69,200,000 65,500,000 47,300,000 39,300,000 35,500,000 38,800,000 33,300,000 28,685,000 27,125,000 26,063,000 25,627,000 27,902,000 45,856,000 31,937,000 32,190,000 37,168,000 33,874,000 33,106,000 35,410,000 33,033,000 31,676,000 27,979,000 24,256,000 23,930,000 18,822,000 18,754,000 19,659,000 19,743,000 20,433,000 20,584,000 16,983,000 15,366,000 15,119,000 15,860,000 17,298,000                                                          
          amortization of deferred commissions costs
        30,000,000 30,600,000 43,500,000 35,900,000 31,000,000 30,600,000 29,800,000 29,100,000 27,200,000 25,389,000 24,544,000 23,378,000 21,889,000 20,709,000 19,377,000 18,413,000 17,583,000 16,663,000 15,881,000 15,530,000 15,317,000 15,499,000 15,355,000 14,915,000 14,747,000 14,232,000 13,639,000 13,143,000 12,407,000 12,071,000 11,967,000 12,269,000 12,006,000                                                              
          non-cash lease expense
        8,000,000 7,700,000 6,300,000 7,600,000 8,400,000 7,600,000 8,600,000 8,200,000 8,300,000 7,908,000 7,945,000 7,378,000 6,769,000 15,381,000 8,028,000 7,543,000 7,537,000 7,367,000 7,982,000 6,653,000 6,483,000 7,525,000 6,401,000 6,139,000 6,261,000                                                                      
          stock-based compensation expense
        42,000,000 41,000,000 70,800,000 51,800,000 30,400,000 21,700,000 21,800,000 22,700,000 22,800,000 21,230,000 21,899,000 21,826,000 20,045,000 21,110,000 18,138,000 18,112,000 17,847,000 16,721,000 16,299,000 15,144,000 15,545,000 12,667,000 16,730,000 8,873,000 15,180,000 13,271,000 13,139,000 13,816,000 12,029,000 10,621,000 8,953,000 11,228,000 10,412,000 9,827,000 9,743,000 10,103,000 9,357,000 9,368,000 9,311,000 9,339,000 8,331,000 9,368,000 9,312,000 8,415,000 7,442,000 7,361,000 6,647,000 6,380,000 7,879,000 9,279,000 7,788,000 7,156,000 17,326,000 3,615,000 3,739,000 2,741,000 2,187,000 1,993,000 1,845,000 2,201,000 2,064,000 2,579,000 1,781,000 1,939,000 2,007,000 1,293,000 2,041,000 1,539,000 1,587,000 1,049,000 1,462,000 1,186,000 1,243,000                      
          deferred income taxes
        3,000,000 30,600,000 10,900,000 -5,000,000 -500,000 -34,700,000 -9,000,000 -3,600,000 -2,800,000 -24,251,000 -5,960,000 -4,082,000 -2,907,000 -9,527,000 -6,730,000 -4,735,000 -10,211,000 7,910,000 6,326,000 4,465,000 5,464,000 -18,342,000 3,243,000 744,000 2,825,000 -5,068,000 6,929,000 2,657,000 3,702,000                                                                  
          credit loss expense
        8,000,000 6,100,000 9,000,000 7,500,000 9,400,000 10,600,000 8,800,000 9,100,000 7,900,000 9,336,000 11,726,000 9,255,000 4,683,000 4,841,000 6,578,000 3,569,000 3,321,000 3,131,000 1,711,000 4,266,000 1,820,000 3,817,000 5,707,000 9,505,000 6,183,000                                                                      
          other operating activities
        1,000,000 900,000 -4,000,000 1,500,000 -3,400,000 -700,000 -700,000 100,000 -3,524,000 -216,000 263,000 277,000 -665,000 -625,000 -1,119,000 -30,000 -664,000 34,000 112,000 -136,000 300,000                                                                         
          changes in operating assets and liabilities, net of acquisitions:
                                                                                                      
          accounts receivable
        -42,000,000 4,300,000 -13,500,000 -3,100,000 -15,700,000 -16,500,000 17,400,000 -15,500,000 -15,600,000 -2,005,000 -23,994,000 -8,444,000 -32,157,000 -10,226,000 -2,859,000 -19,594,000 -13,724,000 -11,915,000 -9,189,000 -917,000 -7,609,000 -1,987,000 3,233,000 -10,751,000 -26,613,000 3,783,000 2,101,000 -5,063,000 -5,835,000 -8,781,000 -13,949,000 -2,578,000 -2,511,000 -1,715,000 -10,632,000 -2,417,000 -2,760,000 -2,236,000 -2,940,000 -1,573,000 -9,295,000 9,280,000 1,371,000 -6,010,000 -8,640,000 -778,000 -1,217,000 2,141,000 -12,499,000 1,698,000 1,180,000 -1,105,000 -8,380,000 4,907,000 -2,283,000 -1,242,000 -87,000 2,291,000 -5,780,000 2,565,000 -3,649,000 353,000 -3,266,000 1,770,000 -633,000 666,000 93,000 1,115,000 -3,484,000                          
          prepaid expenses, other current assets and other assets
        26,000,000 -1,800,000 -32,600,000                                                                                            
          deferred commissions
        -34,000,000 -34,800,000 -37,200,000 -45,700,000 -34,300,000 -28,500,000 -24,100,000 -28,900,000 -38,700,000 -27,053,000 -28,119,000 -32,747,000 -32,281,000 -32,921,000 -29,720,000 -28,326,000 -25,829,000 -22,240,000 -17,876,000 -16,844,000 -15,078,000 -15,651,000 -16,582,000 -15,599,000 -16,523,000 -17,897,000 -15,394,000 -19,668,000 -13,729,000 -12,076,000 -11,867,000 -13,291,000 -16,263,000                                                              
          accounts payable and other liabilities
        -3,000,000 -22,900,000 -43,300,000 76,300,000 -22,100,000 -14,400,000 -30,100,000 10,800,000 77,200,000 12,833,000 -33,355,000 68,153,000 -13,731,000 21,103,000 -11,967,000 46,679,000 -32,581,000 -2,139,000 4,562,000 30,577,000 -63,051,000 53,505,000 9,548,000 22,229,000 15,564,000 22,090,000 -8,476,000 -14,499,000 18,636,000 -689,000 3,176,000 -20,907,000 4,288,000 -363,000 11,283,000 -10,983,000 11,588,000 -14,384,000 7,908,000 -3,456,000 8,412,000 -20,147,000 4,273,000 12,581,000 13,231,000 -18,634,000 13,634,000 17,069,000 -5,991,000 -21,295,000 6,545,000 7,281,000 3,587,000 3,895,000 1,648,000 3,863,000 -7,579,000 -133,000 1,501,000 5,616,000 -2,954,000 2,065,000 1,907,000 4,124,000 -1,406,000 158,000                             
          lease liabilities
        -7,000,000 -7,200,000 -5,000,000 -9,000,000 -9,800,000 -8,100,000 -11,500,000 -10,300,000 -8,100,000 -12,393,000 -10,248,000 -6,553,000 -10,006,000 -9,781,000 -11,683,000 -8,110,000 -7,822,000 -7,308,000 -7,922,000 -7,886,000 -7,788,000 -9,250,000 -7,121,000 -7,159,000 -6,967,000                                                                      
          income taxes payable
        3,000,000 -23,800,000 100,000 -28,000,000 6,700,000 24,100,000 5,300,000 -12,400,000 5,400,000 6,256,000 -8,472,000 -26,693,000 39,609,000 9,792,000 -1,281,000 -68,924,000 41,154,000 9,443,000 -12,998,000 -3,141,000 12,556,000 20,190,000 -22,166,000 10,704,000 1,624,000                             1,195,000 -3,013,000                                        
          deferred revenue
        32,000,000 3,900,000 300,000 4,000,000 12,800,000 3,000,000 -10,800,000 5,900,000 13,100,000 4,745,000 -14,918,000 -4,924,000 13,797,000 2,297,000 -4,032,000 -3,897,000 12,417,000 1,596,000 -348,000 1,468,000 14,680,000 -4,935,000 -6,380,000 -4,745,000 18,248,000 -4,614,000 1,892,000 1,925,000 8,708,000 1,425,000 3,908,000 -2,726,000 5,272,000 35,000 2,246,000 966,000 2,757,000 -2,456,000 766,000 -1,530,000 1,150,000 -1,616,000 4,924,000 -1,012,000 1,521,000 -63,000 1,109,000 1,401,000 1,525,000 -644,000 624,000 -2,588,000 4,316,000 -118,000 3,937,000 1,125,000 843,000 2,793,000 1,083,000 -1,374,000 1,832,000 715,000 1,173,000 -1,857,000 2,131,000 229,000   385,000                          
          net cash from operating activities
        152,000,000 162,100,000 68,200,000 146,500,000 53,200,000 94,600,000 100,300,000 58,100,000 139,600,000 148,515,000 42,605,000 175,164,000 123,216,000 185,031,000 81,490,000 81,392,000 130,707,000 150,513,000 98,929,000 132,436,000 87,853,000 130,768,000 106,692,000 117,182,000 131,464,000 107,763,000 116,450,000 85,073,000 148,494,000 114,774,000 101,367,000 46,332,000 72,985,000 71,396,000 67,944,000 30,806,000 64,557,000 52,212,000 61,368,000 34,438,000 47,926,000 61,529,000 42,760,000 -3,213,000 30,169,000 47,873,000 52,702,000 49,889,000 -6,555,000 35,470,000 31,261,000 30,859,000 10,708,000 29,568,000 25,980,000 24,197,000 6,381,000 5,978,000 4,423,000 7,598,000 7,686,000 12,174,000 6,396,000 14,059,000 6,640,000 7,755,000 12,937,000 9,556,000 9,321,000 10,527,000 14,545,000 7,754,000 8,082,000 23,841,000 11,174,000 5,641,000 11,143,000 8,622,000 9,003,000 6,798,000 8,751,000 8,819,000 3,014,000 2,335,000 6,229,000 6,417,000   4,403,000 4,421,000   1,971,000 116,000 
          capital expenditures
        -54,000,000 -66,500,000 -91,800,000 -151,500,000 -79,200,000 -78,800,000 -86,600,000 -380,300,000 -11,159,000 -5,340,000 -4,884,000 -3,917,000 -14,915,000 -12,913,000 -18,330,000 -12,416,000 -43,687,000 -8,440,000 -2,474,000 -10,619,000 -6,210,000 -29,355,000 -5,649,000 -7,133,000 -2,035,000 -29,775,000 -4,958,000 -9,429,000 -7,831,000 -5,950,000 -7,234,000 -8,617,000 -4,745,000 -7,080,000 -6,528,000 -6,146,000 -7,074,000 -4,298,000 -3,600,000 -3,794,000 -7,108,000 -10,023,000 -6,186,000 -11,744,000 -6,579,000 -9,428,000 -7,288,000 -4,149,000 -3,711,000 -6,419,000 -4,269,000 -4,643,000 -5,832,000 -2,885,000 -3,105,000 -3,012,000 -2,841,000 -2,285,000 -4,115,000 -5,772,000 -4,709,000 -2,753,000 -2,045,000 -1,037,000 -424,000 -810,000 -1,233,000 -1,189,000 -5,852,000 -3,492,000 -2,346,000 -2,581,000 -5,010,000 -2,724,000 -1,225,000 -996,000 -1,739,000 -3,216,000 -2,442,000 -940,000   -1,140,000 -1,450,000   -1,134,000 -535,000 
          free cash flows
        98,000,000 95,600,000 -23,600,000 -5,000,000 -26,000,000 15,800,000 13,700,000 58,100,000 -240,700,000 137,356,000 37,265,000 170,280,000 119,299,000 170,116,000 68,577,000 63,062,000 118,291,000 106,826,000 90,489,000 129,962,000 77,234,000 124,558,000 77,337,000 111,533,000 124,331,000 105,728,000 86,675,000 80,115,000 139,065,000 106,943,000 95,417,000 39,098,000 64,368,000 66,651,000 60,864,000 24,278,000 58,411,000 45,138,000 57,070,000 30,838,000 44,132,000 54,421,000 32,737,000 -9,399,000 18,425,000 41,294,000 43,274,000 42,601,000 -10,704,000 31,759,000 24,842,000 26,590,000 6,065,000 23,736,000 23,095,000 21,092,000 3,369,000 3,137,000 2,138,000 3,483,000 1,914,000 12,174,000 6,396,000 14,059,000 6,640,000 3,046,000 10,184,000 7,511,000 8,284,000 10,103,000 13,735,000 6,521,000 6,893,000 17,989,000 7,682,000 3,295,000 8,562,000 3,612,000 6,279,000 5,573,000 7,755,000 7,080,000 -202,000 -107,000 6,229,000 5,477,000   3,263,000 2,971,000   837,000 -419,000 
          investing activities:
                                                                                                      
          proceeds from sale and settlement of investments and other assets
                                                                                                      
          purchases of property, equipment, and other assets for new campuses
        -45,000,000 -60,800,000 -73,700,000 -118,800,000 -53,700,000 -69,400,000 -60,100,000                                                                                        
          purchases of property, equipment, and other assets
        -9,000,000 -5,700,000 -18,100,000 -32,700,000 -25,500,000 -9,400,000 -26,500,000                                                                                        
          purchase of equity securities
                                                                                                      
          cash paid for acquisitions, net of cash acquired
         200,000 -1,597,100,000 -750,100,000 -271,600,000       58,000   -40,377,000 -4,319,000 -147,833,000 -442,000 -234,073,000 -7,500,000 -184,070,000 -432,000 -423,835,000   -78,295,000                                                                
          net cash from investing activities
        -54,000,000 -66,200,000 -1,688,400,000 -150,800,000 -910,600,000 -350,100,000 -85,200,000 -97,300,000 -380,300,000 -162,648,000 -21,530,000 -34,792,000 -19,630,000 7,431,000 -18,779,000 -45,306,000 -12,401,000 -83,838,000 -12,715,000 -150,470,000 -134,320,000 -240,283,000 -36,855,000 -189,719,000 2,694,000 -425,870,000 -29,775,000 -18,679,000 -9,429,000 -86,126,000 -5,950,000 -7,234,000 -348,691,000 -4,746,000 -9,779,000 -37,923,000 -19,819,000 -5,824,000 -3,946,000 -13,905,000 416,000 -11,973,000 -14,282,000     -590,956,000 -4,149,000 -3,722,000 -6,410,000 -4,274,000 -4,560,000 -5,087,000 1,267,000 -634,811,000 -1,767,000 -13,830,000 -1,703,000 -3,915,000 77,814,000 -614,000 -1,465,000 3,845,000 -42,270,000 -4,416,000 4,171,000 2,061,000 1,592,000 6,762,000 19,461,000 -2,286,000 28,493,000 -14,288,000 -6,294,000 -13,341,000 -6,475,000 -13,792,000 -18,615,000 7,586,000 -10,237,000 -16,272,000 565,000 -12,788,000 -2,986,000 -11,757,000 -2,812,000 -12,391,000 -50,362,000 -12,991,000   -4,051,000 211,000 
          financing activities:
                                                                                                      
          repurchase of restricted stock to satisfy tax withholding obligations
        -22,000,000 -10,800,000 -17,200,000 -12,300,000 -34,700,000 -800,000 -1,800,000 -900,000 -26,000,000 -2,991,000 -964,000 -814,000 -21,631,000 -2,849,000 -504,000 -296,000 -19,459,000 -4,008,000 -901,000 -738,000 -27,667,000 -4,816,000 -398,000 -3,509,000 -30,144,000 -2,537,000 -815,000 -5,546,000 -18,679,000 -661,000 -1,272,000 -7,002,000 -15,392,000 -593,000 -853,000 -7,675,000 -5,781,000 -1,851,000 -606,000 -9,132,000 -4,835,000 -620,000 -443,000 -10,170,000 -5,203,000 -557,000 -243,000 -7,200,000 -42,555,000 -906,000 -359,000 -4,060,000 -3,144,000 -387,000 -1,577,000 -629,000 -1,611,000 -335,000 -195,000 -301,000 -1,476,000 -1,691,000 -201,000 -161,000 -851,000 -171,000 -146,000 -140,000 -215,000                          
          repurchases of stock
        -505,000,000                                                                                              
          proceeds from exercise of stock options and employee stock purchase plan
        14,000,000 3,600,000 6,000,000 7,800,000 6,600,000 2,800,000 4,500,000 12,600,000 4,600,000 2,965,000 4,260,000 10,444,000 5,731,000 2,763,000 3,437,000 3,635,000 3,705,000 3,021,000 2,701,000 3,200,000 9,124,000 2,111,000 11,656,000 6,218,000 10,295,000 2,110,000 6,275,000 4,634,000 12,061,000 1,303,000 11,554,000 3,598,000 10,616,000 830,000 1,375,000 6,449,000 1,234,000 1,070,000 954,000 2,657,000 1,180,000 2,054,000 646,000 649,000 4,055,000 583,000 1,610,000 546,000 3,001,000                                              
          other financing activities
        -1,000,000        -1,100,000         -354,000     -1,534,000                                                                    
          net cash from financing activities
        -514,000,000 -396,900,000 -63,700,000 -51,100,000 -47,300,000 100,000 1,500,000 7,200,000 -22,500,000 -726,000 3,296,000 9,630,000 -15,900,000 -556,000 749,103,000 1,184,000 -15,754,000 -1,341,000 1,800,000 2,405,000 -18,543,000 -3,605,000 249,544,000 1,691,207,000 725,151,000 -1,961,000 5,460,000 -1,035,000 -6,618,000 642,000 10,282,000 -3,404,000 -4,776,000 521,324,000 -121,000 -1,226,000 -39,547,000 -811,000 746,000 -17,575,000 -8,225,000 -3,008,000 -4,379,000 -9,064,000 -4,053,000   762,377,000 -21,844,000 1,186,000 7,858,000 -3,888,000 5,249,000   164,873,000 -814,000 2,413,000 433,000 251,659,000 275,000 -498,000 2,018,000   1,666,000 575,000 65,000 -134,000 5,248,000 3,456,000 2,359,000 412,000 5,215,000 1,734,000 850,000 362,000   2,629,000 1,568,000 4,665,000 975,000 204,000 238,000 1,483,000   58,080,000 1,332,000    81,000 
          effect of foreign currency exchange rates on cash, cash equivalents, and restricted cash
        -1,000,000 -800,000 -8,300,000 4,200,000 1,900,000                                                                                          
          net decrease in cash, cash equivalents, and restricted cash
        -417,000,000  -1,692,200,000 -51,200,000 -902,800,000                                                                                          
          cash, cash equivalents, and restricted cash at the beginning of period
        1,733,000,000 4,681,000,000                                                                                          
          cash, cash equivalents, and restricted cash at the end of period
        1,316,000,000 -301,800,000 -1,692,200,000 -51,200,000 3,778,200,000                                                                                          
          supplemental cash flow disclosures:
                                                                                                      
          interest paid
        14,000,000 500,000     14,100,000 900,000 14,800,000  14,542,000 475,000 14,957,000 474,000 14,520,000 483,000 14,470,000 480,000 14,520,000 473,000 16,037,000 754,000 4,695,000 499,000  493,000 488,000 519,000  618,000 381,000                                                              
          income taxes (refund) paid
        -23,000,000                                                                                              
          supplemental non-cash investing and financing activities:
                                                                                                      
          accrued capital expenditures and non-cash landlord incentives
        75,000,000 -6,500,000     36,500,000 -9,800,000 21,100,000  28,701,000 2,137,000 6,083,000 8,931,000 -3,730,000 1,759,000 7,779,000                                                                              
          purchases of equity securities
         -200,000 -284,800,000                                                                                          
          stock repurchase
         -385,000,000 -51,200,000 -45,300,000 -18,500,000                                                                                          
          net increase in cash, cash equivalents, and restricted cash
                                                                                                      
          income taxes paid
         16,600,000     9,300,000 51,900,000 2,200,000  44,392,000 61,895,000 1,830,000 27,307,000 42,362,000 98,333,000 1,174,000 23,883,000 25,689,000 31,503,000 1,042,000 9,308,000 29,917,000 5,447,000 1,111,000  13,215,000 27,963,000 521,000  768,000 24,243,000 533,000                                                              
          consideration owed for acquisitions
                      -3,000 -4,000 59,000 -316,000 -2,511,000 2,502,000 385,000                                                                         
          proceeds from sale and settlement of investments
          203,400,000                 10,259,000             1,250,000 4,700,000 550,000 700,000 650,000 4,525,000 600,000   -11,000 9,000 -5,000 83,000 745,000 4,152,000                                        
          proceeds from sale of property, equipment, and other assets
          500,000 700,000 100,000                                                                                          
          payments of debt issuance costs
             -200,000               -900,000                              -11,421,000 -125,000                                      
          principal repayments of financing lease obligations
          -1,300,000 -1,300,000 -700,000                                                                                          
          unrealized gains on investments and deal-contingent foreign currency forward contracts
                                                                                                      
          amortization of senior notes discount and issuance costs
            600,000 500,000 600,000 1,100,000 600,000 601,000 602,000 600,000 597,000 594,000 593,000 590,000 588,000 585,000 583,000 581,000 578,000 576,000                                                                         
          prepaid expenses and other current assets
            7,200,000 900,000 5,500,000 -16,000,000 2,200,000 4,545,000 -16,525,000 1,515,000 -5,735,000 -675,000 -20,387,000 3,537,000 -385,000 3,947,000 -4,253,000 -11,744,000 -2,823,000 -2,209,000 -226,000 2,533,000 1,838,000 -13,490,000 -2,505,000 1,545,000 206,000 1,301,000 14,703,000 -8,133,000 -9,522,000 -111,000 4,326,000 -7,528,000 -359,000 241,000 1,218,000 -3,158,000 542,000 104,000 986,000 -157,000 -566,000 -540,000 900,000 -1,697,000 -1,509,000 3,467,000 -1,523,000 1,315,000 -325,000 -1,501,000 -218,000 -1,768,000 138,000 1,623,000 -729,000 -1,512,000 1,660,000 -126,000 -1,307,000 3,224,000 -2,505,000 -1,017,000 -383,000 -25,000 -96,000                          
          other assets
             -600,000 200,000   -262,000 -3,000 -344,000 -391,000 725,000 -86,000 2,244,000 -666,000 -2,652,000 -41,000 -82,000 2,273,000 241,000 8,278,000 -7,972,000 1,215,000                                                             -477,000 -70,000 -4,000 -10,000 -18,000     
          proceeds from sale of property and equipment and other assets
             300,000        25,063,000 5,019,000 15,000 367,000 44,000                                                                            
          payments of long-term debt assumed in acquisition
                                                                                                      
          proceeds from equity offering, net of transaction costs
                     -470,000        -177,000                                                                    
          principal repayments of finance lease obligations
             -1,700,000 -1,200,000                                                                                        
          effect of foreign currency exchange rates on cash and cash equivalents
             -1,200,000 1,500,000 -100,000 -1,100,000 849,000 214,000 -353,000 -10,000 1,599,000 -1,465,000 -2,251,000 -581,000 205,000 -1,336,000 242,000 -606,000 1,227,000 19,000 1,812,000 -2,117,000 1,180,000 -328,000 -364,000 -46,000 -660,000 -191,000 -845,000 448,000 494,000 313,000 509,000 58,000 -453,000 -220,000 -527,000 -215,000 -239,000 -371,000 440,000 -263,000 -267,000 -251,000 104,000 38,000 81,000 128,000 10,000 -30,000 15,000 64,000 -17,000 16,000 -21,000 -30,000 23,000 72,000 -15,000 119,000 -69,000 -223,000 43,000 -306,000 1,055,000 -137,000 -1,705,000 -812,000 -33,000 -66,000 -245,000 214,000 166,000 -71,000   15,000 -24,000 -222,000 -52,000 -43,000 75,000 -187,000 155,000 47,000 228,000 25,000 45,000 11,000   
          net increase in cash and cash equivalents
             -256,600,000 18,100,000 -32,100,000 -264,300,000 -14,010,000 24,585,000 149,649,000 87,676,000             -318,888,000 91,807,000 64,995,000 132,401,000 28,630,000   -280,034,000 588,468,000 58,357,000 -7,834,000 5,249,000 45,124,000 57,948,000 2,431,000 39,902,000 46,309,000 23,728,000 -189,990,000 14,759,000 40,817,000 41,338,000 221,414,000 -32,510,000 33,015,000 32,837,000 22,707,000 11,367,000 26,565,000 26,124,000 -445,758,000 3,816,000 -5,460,000 3,123,000 255,365,000 85,847,000 11,047,000 7,068,000 18,084,000 -35,580,000 5,048,000 17,377,000 12,737,000 10,642,000 20,832,000 36,650,000 7,794,000 36,921,000 14,523,000 6,828,000 -6,684,000 4,959,000   17,028,000     3,556,000 -4,044,000     5,597,000 -636,000  408,000 
          cash and cash equivalents at beginning of year
                                                                                                      
          cash and cash equivalents at end of year
                                                                                                      
          cash and cash equivalents at the beginning of period
              5,215,900,000  4,967,970,000              1,100,416,000  1,211,463,000  567,223,000  421,818,000  527,012,000  255,953,000  156,027,000  545,280,000  206,405,000  205,786,000  159,982,000  57,785,000  38,159,000   28,065,000  36,807,000  35,643,000      
          cash and cash equivalents at the end of period
              18,100,000 -32,100,000 4,951,600,000  24,585,000 149,649,000 5,055,646,000              91,807,000 64,995,000 1,232,817,000  105,508,000 34,849,000 931,429,000  58,357,000 -7,834,000 572,472,000  57,948,000 2,431,000 461,720,000  23,728,000 -189,990,000 541,771,000  41,338,000 221,414,000 223,443,000  32,837,000 22,707,000 167,394,000  26,124,000 -445,758,000 549,096,000  3,123,000 255,365,000 292,252,000  7,068,000 18,084,000 170,206,000  17,377,000 12,737,000 170,624,000  36,650,000 7,794,000 94,706,000  6,828,000 -6,684,000 43,118,000   45,093,000  -3,010,000 4,502,000 26,515,000  -4,044,000 6,055,000 31,240,000  -7,213,000     
          purchases of property, equipment and other assets for new campuses
                -376,700,000                                                                                      
          purchases of property and equipment and other assets
                -3,600,000 -11,159,000 -5,340,000 -4,884,000 -3,917,000 -14,915,000 -12,913,000 -18,330,000 -12,416,000 -43,687,000 -8,440,000 -2,474,000 -10,619,000 -6,210,000 -29,355,000 -5,649,000 -7,133,000 -2,035,000 -29,775,000 -4,958,000 -9,429,000 -7,831,000 -5,950,000 -7,234,000 -8,617,000 -4,745,000 -7,080,000 -6,528,000 -6,146,000 -7,074,000 -4,298,000 -3,600,000 -3,794,000 -7,108,000 -10,023,000 -6,186,000 -11,744,000 -6,579,000 -9,428,000 -7,288,000 -4,149,000 -3,711,000 -6,419,000 -4,269,000 -4,643,000 -5,832,000 -2,885,000 -3,105,000 -3,012,000 -2,841,000 -2,285,000 -4,115,000 -5,772,000     -4,709,000 -2,753,000 -2,045,000 -1,037,000 -424,000 -810,000 -1,233,000 -1,189,000 -5,852,000 -3,492,000 -2,346,000 -2,581,000 -5,010,000 -2,724,000 -1,225,000 -996,000 -1,739,000 -3,216,000 -2,442,000           
          purchase and construction of richmond assets
                                                                                                      
          purchase of richmond assets
                  -16,190,000 -29,908,000 -15,713,000        -123,259,000                                                                          
          repayments of long-term debt assumed in acquisition
                                                                                                     
          accrued transaction costs from equity offering
                                                                                                      
          proceeds from long-term debt
                             999,210,000 745,000,000                                                                  
          payments of long-term debt
                                        -310,000,000 -35,000,000 -15,000,000 -5,000,000 -5,000,000 -5,000,000 -5,000,000 -5,000,000 -5,000,000 -5,000,000 -303,750,000 -4,375,000 -4,375,000 -4,375,000 -4,375,000 -4,375,000 -2,188,000                                        
          purchase of richmond assets and other intangibles
                      -5,866,000   -141,000                                                                            
          net increase in cash, cash equivalents and restricted cash
                      810,349,000 35,019,000 101,971,000  86,678,000 -15,387,000 -65,616,000  319,400,000 1,620,482,000 857,192,000                                                                      
          cash, cash equivalents and restricted cash at the beginning of period
                      3,827,126,000  3,755,912,000  1,070,731,000                                                                      
          cash, cash equivalents and restricted cash at the end of period
                      810,349,000 35,019,000 3,929,097,000  86,678,000 -15,387,000 3,690,296,000  319,400,000 1,620,482,000 1,927,923,000                                                                      
          cash, cash equivalents and restricted cash at beginning of year
                                                                                                      
          cash, cash equivalents and restricted cash at end of year
                                                                                                      
          accrued capital expenditures
                          -2,524,000                                                                            
          realized loss on investments
                               541,000                                                                      
          stock issued in connection with acquisition - forrent
                                      36,366,000                                                              
          amortization of debt issuance costs
                               216,000 292,000 219,000 219,000 219,000 219,000 219,000 221,000 217,000 219,000 146,000 670,000 715,000 772,000 820,000 797,000 799,000 811,000 825,000 830,000 829,000 827,000 853,000 904,000 845,000 710,000 741,000 760,000 766,000 747,000 754,000 763,000                                        
          foreign currency
                                                                                                      
          loss on extinguishment of debt
                                                                                                      
          loss on disposal of property and equipment
                                                                                                      
          bad debt expense
                                 3,520,000 2,234,000 3,039,000 2,185,000 2,023,000 1,662,000 1,426,000 1,431,000                                                              
          income tax receivable
                                                                                                      
          lease right-of-use and other assets
                                  5,231,000 5,957,000 5,138,000                                                                  
          impairment loss
                                                 1,376,000 1,402,000 746,000 1,053,000                                              
          realized gain on investments
                                                                                                      
          deposits and other assets
                                     1,608,000 48,000 1,968,000 -3,412,000 3,426,000 -3,284,000 14,000 -117,000 285,000 -9,000 243,000 239,000 275,000 302,000 192,000 -83,000 -89,000 65,000 -172,000 39,000 179,000 21,000 -123,000 322,000 -114,000 50,000 1,377,000 -141,000 -666,000 135,000 30,000 347,000 6,000 -795,000 -54,000 458,000 -760,000 -206,000                            
          deferred income tax expense
                                      3,353,000 2,440,000 1,851,000 -8,990,000 2,653,000 1,343,000 2,091,000 10,081,000 2,080,000         -2,657,000 5,090,000 -6,292,000 -329,000 1,538,000 -7,657,000 1,815,000 3,298,000 5,855,000 2,675,000 -12,579,000 461,000 -5,451,000 465,000 3,926,000 20,000 -2,089,000 -182,000 -643,000 -1,411,000 -408,000 34,000 -1,540,000 2,011,000 -2,449,000 4,126,000 4,841,000                     
          net (decrease) in cash and cash equivalents
                                                                                                      
          acquisitions, net of cash acquired
                                        -340,074,000 -1,000 -2,699,000 -31,395,000 -13,673,000 352,000 -10,305,000 -490,000 -4,865,000                      -2,815,000                -250,000 -4,162,000  -301,000         
          provision for losses on accounts receivable
                                          1,643,000 549,000 1,800,000 896,000 1,354,000 2,890,000 2,218,000 1,512,000 1,940,000 1,992,000 1,558,000 1,024,000 1,762,000 1,050,000 986,000 498,000 776,000 722,000 321,000 38,000 443,000 617,000 358,000 485,000   537,000 200,000 253,000 456,000 562,000    1,502,000 1,294,000     577,000 412,000 517,000   295,000 470,000 276,000 87,000 146,000 90,000   126,000  554,000    567,000 
          payments of issuance costs
                                                                                                      
          excess tax benefit from stock-based compensation
                                             30,000 -398,000 -3,900,000 -430,000 -558,000 -418,000 -5,457,000 -2,095,000 -239,000 -1,348,000 -3,390,000 -23,429,000 -34,990,000 25,155,000                                            
          payments of deferred consideration
                                                     -1,344,000 -1,344,000                                          
          depreciation
                                              6,670,000 5,789,000 5,468,000 5,522,000 5,261,000 4,996,000 4,188,000 4,022,000 3,928,000 3,621,000 3,540,000 3,321,000 3,257,000 3,008,000 2,909,000 2,850,000 2,731,000 2,328,000 2,144,000 2,045,000 1,949,000 2,132,000 2,309,000 2,195,000 2,128,000 2,139,000 2,145,000 1,987,000 1,773,000 1,887,000 1,936,000 1,951,000 2,106,000 2,140,000 2,163,000 2,079,000 2,084,000 1,871,000 1,744,000 1,409,000 1,328,000 1,354,000 1,375,000 1,405,000 1,435,000 1,510,000 1,565,000 1,288,000 1,297,000 1,375,000 1,288,000 1,242,000    1,045,000 
          amortization
                                              11,410,000 11,651,000 12,053,000 14,003,000 17,259,000 13,678,000 13,625,000 15,617,000 16,284,000 17,049,000 6,311,000 6,500,000 6,765,000 7,041,000 7,257,000 7,703,000 7,964,000 5,856,000 1,176,000 1,164,000 1,054,000 1,076,000 1,123,000 1,193,000 1,179,000 1,167,000 1,503,000 1,947,000 1,835,000 1,571,000 1,740,000 1,981,000 2,147,000 2,194,000 2,119,000 2,361,000 2,032,000 2,110,000 1,866,000 1,544,000 1,533,000 1,459,000 1,449,000 1,354,000 1,521,000 1,665,000 1,768,000 1,849,000 1,929,000 1,939,000 1,982,000 2,102,000    2,153,000 
          deferred income tax benefit
                                                1,706,000 7,910,000   3,886,000                                                  
          changes in operating assets and liabilities:
                                                                                                      
          property and equipment write-off
                                                             37,000    7,000 604,000 2,000 15,000                                  
          acquisition, net of cash acquired
                                                                                -16,737,000                 
          net cash used in investing activities
                                                    -11,094,000                                                  
          net cash provided by financing activities
                                                                                               1,856,000       
          deferred consideration settlement
                                                                                                      
          proceeds from sale of building
                                                                                                    
          excess tax expense from stock-based compensation
                                                                                                      
          proceeds from exercise of stock options and espp
                                                          6,937,000 2,102,000 6,807,000 2,201,000 2,635,000 4,575,000 457,000 1,640,000 442,000 3,384,000 1,156,000                                  
          excess tax benefit from stock options
                                                            -7,305,000 -141,000   -465,000 -1,108,000 -186,000 -652,000 -595,000 -184,000 -378,000 -11,000 -329,000                              
          interest receivable
                                                                                                      
          excess tax expense from stock options
                                                                                                      
          settlement of investments
                                                                1,245,000 4,096,000                                     
          benefit from losses on accounts receivable
                                                                               1,016,000 946,000                      
          sales of investments
                                                                   200,000 33,000 3,632,000 5,081,000 6,465,000 1,676,000 3,108,000 7,316,000 4,106,000 2,629,000  18,055,000 4,614,000 31,172,000                      
          proceeds from sale-leaseback of building
                                                                    83,553,000                                  
          fixed asset write-off
                                                                     355,000                                 
          purchases of investments
                                                                              2,216,000 -2,643,000 -1,490,000                      
          purchases of fixed assets and other assets
                                                                      -6,546,000 -2,620,000 -43,946,000                              
          proceeds from exercise of stock options
                                                                      1,841,000 399,000 795,000 1,434,000 721,000 205,000 81,000  3,456,000 2,359,000 412,000 5,215,000 1,734,000 850,000 362,000   2,629,000  4,665,000 975,000 204,000  1,483,000         
          leasehold write-off
                                                                         16,000 60,000                            
          net cash from (used in) financing activities
                                                                        273,000                              
          accounts payable and accrued expenses
                                                                           -1,237,000 -431,000                          
          deferred revenue .
                                                                                                      
          deposits
                                                                            42,000                          
          purchases of short-term investments
                                                                                 -29,896,000 -22,197,000 -38,201,000 -26,382,000 -20,936,000 -35,808,000 -25,461,000 -54,367,000 -65,383,000 -70,235,000 -60,287,000           
          sales of short-term investments
                                                                                 21,460,000 19,395,000 27,206,000 39,225,000 12,154,000 19,917,000 34,272,000 45,015,000 50,850,000 74,266,000 54,103,000           
          proceeds from transactions in stock based plans
                                                                                                      
          changes in operating assets and liabilities, net of acquisitions
                                                                              -612,000 -1,768,000 -7,557,000  -801,000 -2,422,000 2,189,000 -3,475,000 887,000 -276,000  3,880,000 -1,965,000 -2,604,000  908,000 1,024,000 1,176,000       
          supplemental disclosure of non-cash transactions:
                                                                                                      
          deferred tax benefit for exercised stock options
                                                                                                      
          stock-based compensation expense related to stock options and restricted stock
                                                                                  1,373,000 1,533,000 1,529,000                  
          income tax expense
                                                                                   962,000 1,484,000  1,645,000 1,108,000 2,041,000 767,000             
          stock based compensation expense related to stock options and restricted stock
                                                                                      995,000 998,000               
          unearned compensation
                                                                                                      
          cash held for acquisition
                                                                                                    
          acquisitions, net of acquired cash
                                                                                                    -50,000  
          exercise of stock options
                                                                                               1,856,000       
          issuance of common stock
                                                                                                      
          net decrease in cash and cash equivalents
                                                                                           -10,292,000    -4,403,000       
          income tax benefit
                                                                                           644,000 -16,866,000 -100,000 -74,000 -12,000       
          release of valuation allowance related to the deferred tax benefit for exercised stock options
                                                                                                      
          purchases and sales of short-term investments
                                                                                             -10,039,000 3,280,000 -11,571,000  -11,523,000   13,524,000 768,000 
          purchases of property and equipment
                                                                                             -940,000 -4,053,000 -816,000 -1,140,000 -1,450,000   -1,134,000  
          net cash provided by operating activities
                                                                                               6,085,000       
          loss on disposal of assets
                                                                                                      
          purchases and sales of short-term investments.
                                                                                                      
          net loss
                                                                                                 281,000 -367,000 -843,000 -770,000 -1,622,000 
          adjustments to reconcile net loss to net cash from operating activities:
                                                                                                      
          changes in operating assets and liabilities
                                                                                                 242,000    -2,027,000 
          net proceeds from exercise of stock options
                                                                                                 1,332,000   130,000 81,000 
          cash and cash equivalents at beginning of period
                                                                                                   25,546,000  30,746,000 
          cash and cash equivalents at end of period
                                                                                                   24,910,000  31,154,000 
          payment of long-term liability
                                                                                                      
          goodwill, intangibles and other assets
                                                                                                     -22,000 
          net purchases of property and equipment
                                                                                                     -535,000 
          acquired in-process development
                                                                                                      
          acquisitions