7Baggers

Monolithic Power Systems, Inc
(NASDAQ:MPWR) 

MPWR stock logo

Monolithic Power Systems, Inc. designs, develops, and markets integrated power semiconductor solutions and power delivery architectures for computing and storage, automotive, industrial, communications, and consumer applications markets. It offers direct current (DC) to DC integrated circuits (ICs) ...

Founded: 1997
Full Time Employees: 2,002
Sector: Technology
Industry: Semiconductors

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Quarterly
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    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 2014-09-30 2014-06-30 2014-03-31 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 
                                                                      
      revenue
    804,185,000 751,155,000 737,176,000 664,574,000 637,554,000 621,665,000 620,119,000 507,431,000 457,885,000 454,012,000 474,867,000 441,128,000 451,065,000 460,012,000 495,418,000 461,004,000 377,714,000 336,504,000 323,522,000 293,317,000 254,455,000 233,043,000 259,422,000 186,209,000 165,778,000 166,738,000 168,813,000 151,007,000 141,363,000 153,497,000 159,975,000 139,761,000 129,150,000 129,430,000 128,939,000 112,198,000 100,362,000 103,618,000 106,456,000 94,079,000 84,512,000 86,919,000 91,194,000 81,416,000 73,538,000 78,335,000 68,436,000 60,061,000 65,347,000 57,714,000 51,470,000 48,214,000 56,508,000 58,607,000 50,484,000 47,461,000 52,962,000 51,628,000 44,468,000 47,057,000 65,843,000 55,690,000 50,250,000 46,547,000 47,966,000 41,173,000 
      yoy
    26.14% 20.83% 18.88% 30.97% 39.24% 36.93% 30.59% 15.03% 1.51% -1.30% -4.15% -4.31% 19.42% 36.70% 53.13% 57.17% 48.44% 44.40% 24.71% 57.52% 53.49% 39.77% 53.67% 23.31% 17.27% 8.63% 5.52% 8.05% 9.46% 18.59% 24.07% 24.57% 28.68% 24.91% 21.12% 19.26% 18.75% 19.21% 16.74% 15.55% 14.92% 10.96% 33.25% 35.56% 12.53% 35.73% 32.96% 24.57% 15.64% -1.52% 1.95% 1.59% 6.70% 13.52% 13.53% 0.86% -19.56% -7.29% -11.51% 1.10% 37.27% 35.26%     
      qoq
    7.06% 1.90% 10.92% 4.24% 2.56% 0.25% 22.21% 10.82% 0.85% -4.39% 7.65% -2.20% -1.94% -7.15% 7.47% 22.05% 12.25% 4.01% 10.30% 15.27% 9.19% -10.17% 39.32% 12.32% -0.58% -1.23% 11.79% 6.82% -7.91% -4.05% 14.46% 8.22% -0.22% 0.38% 14.92% 11.79% -3.14% -2.67% 13.16% 11.32% -2.77% -4.69% 12.01% 10.71% -6.12% 14.46% 13.94% -8.09% 13.23% 12.13% 6.75% -14.68% -3.58% 16.09% 6.37% -10.39% 2.58% 16.10% -5.50% -28.53% 18.23% 10.83% 7.96% -2.96% 16.50%  
      cost of revenue
    359,120,000 336,888,000 330,948,000 298,558,000 284,324,000 277,257,000 276,676,000 226,853,000 205,444,000 202,889,000 211,326,000 193,453,000 192,285,000 192,203,000 204,516,000 190,043,000 158,834,000 142,630,000 137,211,000 129,102,000 113,396,000 104,169,000 116,382,000 83,616,000 74,331,000 74,802,000 75,655,000 67,782,000 63,357,000 68,904,000 70,957,000 62,197,000 57,655,000 58,269,000 58,083,000 50,773,000 45,520,000 47,106,000 48,531,000 43,153,000 39,002,000 40,002,000 41,754,000 37,287,000 33,855,000 35,872,000 31,337,000 27,964,000 30,053,000 26,786,000 24,085,000 22,661,000 26,495,000 27,435,000 24,074,000 -72,380,688 25,148,000 25,070,000 22,163,000 -74,066,607 29,857,000 23,256,000 20,954,000 19,208,000 18,868,000 16,823,000 
      gross profit
    445,065,000 414,267,000 406,228,000 366,016,000 353,230,000 344,408,000 343,443,000 280,578,000 252,441,000 251,123,000 263,541,000 247,675,000 258,780,000 267,809,000 290,902,000 270,961,000 218,880,000 193,874,000 186,311,000 164,215,000 141,059,000 128,874,000 143,040,000 102,593,000 91,447,000 91,936,000 93,158,000 83,225,000 78,006,000 84,593,000 89,018,000 77,564,000 71,495,000 71,161,000 70,856,000 61,425,000 54,842,000 56,512,000 57,925,000 50,926,000 45,510,000 46,917,000 49,440,000 44,129,000 39,683,000 42,463,000 37,099,000 32,097,000 35,294,000 30,928,000 27,385,000 25,553,000 30,013,000 31,172,000 26,410,000 24,917,000 27,814,000 26,558,000 22,305,000 23,741,000 35,986,000 32,434,000 29,296,000 27,339,000 29,098,000 24,350,000 
      yoy
    26.00% 20.28% 18.28% 30.45% 39.93% 37.15% 30.32% 13.28% -2.45% -6.23% -9.41% -8.59% 18.23% 38.14% 56.14% 65.00% 55.17% 50.44% 30.25% 60.06% 54.25% 40.18% 53.55% 23.27% 17.23% 8.68% 4.65% 7.30% 9.11% 18.88% 25.63% 26.27% 30.37% 25.92% 22.32% 20.62% 20.51% 20.45% 17.16% 15.40% 14.68% 10.49% 33.27% 37.49% 12.44% 37.30% 35.47% 25.61% 17.60% -0.78% 3.69% 2.55% 7.91% 17.37% 18.40% 4.95% -22.71% -18.12% -23.86% -13.16% 23.67% 33.20%     
      qoq
    7.43% 1.98% 10.99% 3.62% 2.56% 0.28% 22.41% 11.15% 0.52% -4.71% 6.41% -4.29% -3.37% -7.94% 7.36% 23.79% 12.90% 4.06% 13.46% 16.42% 9.45% -9.90% 39.42% 12.19% -0.53% -1.31% 11.94% 6.69% -7.79% -4.97% 14.77% 8.49% 0.47% 0.43% 15.35% 12.00% -2.96% -2.44% 13.74% 11.90% -3.00% -5.10% 12.04% 11.20% -6.55% 14.46% 15.58% -9.06% 14.12% 12.94% 7.17% -14.86% -3.72% 18.03% 5.99% -10.42% 4.73% 19.07% -6.05% -34.03% 10.95% 10.71% 7.16% -6.05% 19.50%  
      gross margin %
    55.34% 55.15% 55.11% 55.08% 55.40% 55.40% 55.38% 55.29% 55.13% 55.31% 55.50% 56.15% 57.37% 58.22% 58.72% 58.78% 57.95% 57.61% 57.59% 55.99% 55.44% 55.30% 55.14% 55.10% 55.16% 55.14% 55.18% 55.11% 55.18% 55.11% 55.64% 55.50% 55.36% 54.98% 54.95% 54.75% 54.64% 54.54% 54.41% 54.13% 53.85% 53.98% 54.21% 54.20% 53.96% 54.21% 54.21% 53.44% 54.01% 53.59% 53.21% 53.00% 53.11% 53.19% 52.31% 52.50% 52.52% 51.44% 50.16% 50.45% 54.65% 58.24% 58.30% 58.73% 60.66% 59.14% 
      operating expenses:
                                                                      
      research and development
    100,566,000 95,597,000 98,173,000 96,266,000 92,227,000 85,762,000 85,051,000 77,945,000 75,990,000 71,459,000 64,787,000 63,688,000 63,709,000 61,674,000 67,263,000 57,131,000 54,104,000 54,514,000 49,468,000 44,753,000 41,892,000 42,252,000 37,717,000 31,673,000 25,956,000 27,011,000 27,742,000 27,545,000 25,458,000 22,735,000 25,630,000 23,481,000 21,609,000 21,730,000 21,442,000 20,292,000 18,894,000 17,974,000 20,472,000 17,876,000 17,321,000 16,734,000 17,272,000 15,743,000 16,038,000 14,679,000 13,368,000 15,603,000 12,643,000 12,478,000 12,123,000 13,243,000 11,967,000 12,468,000 11,118,000 -33,109,091 11,792,000 11,237,000 10,086,000 -34,109,258 11,291,000 11,785,000 11,040,000 10,366,000 10,080,000 9,732,000 
      selling, general and administrative
    103,347,000 118,734,000 112,872,000 104,992,000 92,244,000 95,339,000 94,364,000 86,097,000 80,964,000 70,095,000 63,188,000 71,662,000 70,795,000 66,057,000 69,717,000 70,668,000 67,153,000 61,208,000 56,291,000 57,238,000 51,453,000 45,120,000 43,503,000 40,883,000 32,164,000 33,240,000 34,692,000 35,058,000 30,553,000 28,372,000 29,552,000 28,561,000 27,318,000 24,038,000 25,255,000 25,873,000 22,092,000 21,316,000 22,397,000 21,531,000 17,768,000 18,108,000 18,722,000 17,964,000 17,518,000 17,006,000 16,853,000 16,109,000 13,891,000 13,793,000 13,258,000 13,930,000 11,955,000 12,167,000 11,966,000 -30,075,095 10,249,000 10,343,000 9,490,000 -32,294,325 10,296,000 11,615,000 10,393,000 10,185,000 9,438,000 9,321,000 
      total operating expenses
    203,913,000 214,331,000 211,045,000 201,258,000 184,471,000 181,101,000 179,415,000 164,042,000 156,954,000 141,554,000 127,975,000 135,350,000 134,504,000 130,917,000 139,031,000 129,073,000 122,746,000 115,302,000 109,180,000 103,587,000 94,973,000 88,912,000 83,061,000 74,638,000 60,461,000 61,242,000 63,126,000 63,106,000 56,289,000 51,516,000 55,525,000 52,682,000 49,458,000 46,108,000 47,024,000 46,455,000 41,272,000 38,969,000 42,924,000 39,399,000 35,134,000 35,125,000 36,130,000 34,018,000 33,826,000 32,017,000 30,495,000 23,012,000 26,638,000 26,014,000 25,080,000 24,573,000 23,693,000 24,391,000 23,212,000 22,506,000 22,763,000 22,519,000 20,389,000 19,780,000 22,551,000 25,628,000 23,000,000 22,918,000 15,973,000 21,286,000 
      operating income
    241,152,000 199,936,000 195,183,000 164,758,000 168,759,000 163,307,000 164,028,000 116,536,000 95,487,000 109,569,000 135,566,000 112,325,000 124,276,000 136,892,000 151,871,000 141,888,000 96,134,000                                                  
      yoy
    42.90% 22.43% 18.99% 41.38% 76.74% 49.04% 20.99% 3.75% -23.17% -19.96% -10.74% -20.84% 29.27%                                                      
      qoq
    20.61% 2.44% 18.47% -2.37% 3.34% -0.44% 40.75% 22.04% -12.85% -19.18% 20.69% -9.62% -9.22% -9.86% 7.04% 47.59%                                                   
      operating margin %
    29.99% 26.62% 26.48% 24.79% 26.47% 26.27% 26.45% 22.97% 20.85% 24.13% 28.55% 25.46% 27.55% 29.76% 30.66% 30.78% 25.45% 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% 
      other income
    6,030,000 9,837,000 10,392,000 12,220,000 5,131,000 6,224,000 10,278,000 7,512,000 9,540,000 9,976,000 2,289,000 6,543,000 5,297,000 3,872,000 5,000 -5,092,000 -634,000 3,391,000 793,000 3,031,000 2,587,000 4,480,000 2,494,000 5,200,000 -1,714,000                                          
      income before income taxes
    247,182,000 209,773,000 205,575,000 176,978,000 173,890,000 169,531,000 174,306,000 124,048,000 105,027,000 119,545,000 137,855,000 118,868,000 129,573,000 140,764,000 151,876,000 136,796,000 95,500,000 81,963,000 77,924,000 63,659,000 48,673,000 44,442,000 62,473,000 33,155,000 29,272,000 33,425,000 32,289,000 22,348,000 25,058,000 32,684,000 36,207,000 27,114,000 22,477,000 26,700,000 25,087,000 16,207,000 14,951,000 18,440,000 15,781,000 12,124,000 10,919,000 12,342,000 13,304,000 10,346,000 6,499,000 10,648,000 6,899,000 9,275,000 8,597,000 5,132,000 2,295,000 970,000 6,476,000 7,140,000 3,304,000 2,510,000 5,054,000 4,063,000 2,099,000 4,121,000 13,516,000 7,140,000 6,643,000 4,567,000 13,210,000 3,160,000 
      income tax expense
    53,956,000 34,081,000 27,301,000 43,252,000 40,099,000 -1,279,832,000 29,876,000 23,682,000 12,486,000 22,640,000 16,692,000 19,364,000 19,771,000 21,674,000 27,539,000 22,117,000 15,934,000 9,292,000 9,154,000 8,490,000 3,260,000 1,555,000 6,907,000 2,988,000  988,000 2,761,000 1,655,000 -1,123,000                                      
      net income
    193,226,000 175,692,000 178,274,000 133,726,000 133,791,000 1,449,363,000 144,430,000 100,366,000 92,541,000 96,905,000 121,163,000 99,504,000 109,802,000 119,090,000 124,337,000 114,679,000 79,566,000 72,671,000 68,770,000 55,169,000 45,413,000 42,887,000 55,566,000 30,167,000 35,756,000 32,437,000 29,528,000 20,693,000 26,181,000 27,638,000 31,568,000 24,206,000 21,856,000 12,071,000 23,642,000 15,014,000 14,477,000 16,574,000 14,373,000 11,198,000 10,575,000 10,109,000 11,201,000 7,899,000 5,963,000 11,221,000 6,397,000 9,018,000 7,410,000 5,489,000 2,499,000 248,000 5,921,000 6,592,000 2,995,000 2,453,000 5,473,000 3,482,000 1,893,000 3,581,000 13,219,000 6,407,000 6,356,000 4,654,000 12,562,000 3,186,000 
      yoy
    44.42% -87.88% 23.43% 33.24% 44.57% 1395.65% 19.20% 0.87% -15.72% -18.63% -2.55% -13.23% 38.00% 63.88% 80.80% 107.87% 75.21% 69.45% 23.76% 82.88% 27.01% 32.22% 88.18% 45.78% 36.57% 17.36% -6.46% -14.51% 19.79% 128.96% 33.53% 61.22% 50.97% -27.17% 64.49% 34.08% 36.90% 63.95% 28.32% 41.76% 77.34% -9.91% 75.10% -12.41% -19.53% 104.43% 155.98% 3536.29% 25.15% -16.73% -16.56% -89.89% 8.19% 89.32% 58.21% -31.50% -58.60% -45.65% -70.22% -23.06% 5.23% 101.10%     
      qoq
    9.98% -1.45% 33.31% -0.05% -90.77% 903.51% 43.90% 8.46% -4.50% -20.02% 21.77% -9.38% -7.80% -4.22% 8.42% 44.13% 9.49% 5.67% 24.65% 21.48% 5.89% -22.82% 84.19% -15.63% 10.23% 9.85% 42.70% -20.96% -5.27% -12.45% 30.41% 10.75% 81.06% -48.94% 57.47% 3.71% -12.65% 15.31% 28.35% 5.89% 4.61% -9.75% 41.80% 32.47% -46.86% 75.41% -29.06% 21.70% 35.00% 119.65% 907.66% -95.81% -10.18% 120.10% 22.10% -55.18% 57.18% 83.94% -47.14% -72.91% 106.32% 0.80% 36.57% -62.95% 294.29%  
      net income margin %
    24.03% 23.39% 24.18% 20.12% 20.99% 233.14% 23.29% 19.78% 20.21% 21.34% 25.52% 22.56% 24.34% 25.89% 25.10% 24.88% 21.07% 21.60% 21.26% 18.81% 17.85% 18.40% 21.42% 16.20% 21.57% 19.45% 17.49% 13.70% 18.52% 18.01% 19.73% 17.32% 16.92% 9.33% 18.34% 13.38% 14.42% 16.00% 13.50% 11.90% 12.51% 11.63% 12.28% 9.70% 8.11% 14.32% 9.35% 15.01% 11.34% 9.51% 4.86% 0.51% 10.48% 11.25% 5.93% 5.17% 10.33% 6.74% 4.26% 7.61% 20.08% 11.50% 12.65% 10.00% 26.19% 7.74% 
      net income per share
                                                                      
      basic
    3.94 3.63 3.72 2.79 2.8 29.83 2.96 2.06 1.9 2.02 2.54 2.1 2.32 2.54 2.66 2.46 1.71 1.58 1.5 1.2 0.95 1.24 0.67 0.8 0.75 0.68 0.48 0.61 0.65 0.75 0.57 0.52 0.29 0.57 0.36 0.35 0.4 0.35 0.28 0.26 0.25 0.28 0.2 0.15 0.29 0.17                    
      diluted
    3.92 3.58 3.71 2.78 2.79 29.7 2.95 2.05 1.89 1.98 2.48 2.04 2.26 2.45 2.57 2.37 1.65 1.5 1.44 1.16 0.95 0.91 1.18 0.64 0.77 0.7 0.64 0.45 0.58 0.61 0.71 0.55 0.49 0.28 0.54 0.35 0.33 0.39 0.34 0.27 0.25 0.24 0.28 0.19 0.15 0.28 0.16                    
      weighted-average shares outstanding:
                                                                      
      basic
    49,097 48,035 47,898 47,887 47,851 48,599 48,757 48,687 48,635 47,610 47,780 47,489 47,234 46,727 46,829 46,675 46,424 45,851 45,970 45,796 45,498 44,840 44,970 44,785 44,455 43,165 43,308 43,109 42,749 42,247 42,362 42,237 41,922 41,350 41,458 41,323 41,047 40,436 40,590 40,387 40,028 39,470 39,592 39,570 39,105 38,785 38,684 38,470 37,910 37,053 36,259 34,871 35,145 34,665 34,105  33,594 33,846 35,024        
      diluted
    49,242 48,309 48,042 48,019 48,006 48,835 48,964 48,945 48,928 48,771 48,792 48,756 48,655 48,358 48,349 48,286 48,250 47,889 47,852 47,754 47,711 47,014 46,955 46,831 46,670 45,763 45,833 45,483 45,232 44,602 44,669 44,400 44,282 43,578 43,486 43,397 43,268 41,915 41,895 41,716 41,646 40,869 40,689 40,745 40,596 39,727 39,608 39,517 39,009 38,239 37,708 36,247 36,438 35,997 35,538  34,240 34,903 36,105        
      litigation expense
                 3,186,000 2,051,000 1,274,000 1,489,000 -420,000 3,421,000 1,596,000 1,628,000 1,540,000 1,841,000 2,082,000 2,341,000 991,000 692,000 503,000 278,000 409,000 343,000 640,000 531,000 340,000 327,000 290,000 286,000 -321,000 55,000 -8,000 45,000 283,000 136,000 311,000 270,000 332,000      -86,250 -229,000 -244,000 128,000 618,500 722,000 939,000 813,000 659,000 964,000 2,228,000 1,567,000 2,367,000 2,811,000  
      income from operations
                     45,961,250 77,131,000 60,628,000 46,086,000 39,962,000 59,979,000 27,955,000 30,986,000 30,694,000 30,032,000 20,119,000 21,717,000 33,077,000 33,493,000 24,882,000 22,037,000 25,053,000 23,832,000 14,970,000 13,570,000 17,543,000 15,001,000 11,527,000 10,376,000 11,792,000 13,310,000 10,111,000 5,857,000 10,446,000 6,604,000 9,085,000 8,656,000 4,914,000 2,305,000 980,000 6,320,000 6,781,000 3,198,000 2,411,000 5,051,000 4,039,000 1,916,000 3,961,000 13,435,000 6,806,000 6,296,000 4,421,000 13,125,000 3,064,000 
      income tax benefit
                            -6,484,000                      502,000   -357,000 -204,000                
      interest and other income
                             2,731,000 2,257,000 2,229,000 3,341,000 -393,000 2,714,000 2,232,000 440,000 1,647,000 1,255,000 1,237,000 1,381,000 897,000 780,000 597,000 543,000 550,000 -6,000 235,000 642,000 202,000 295,000 190,000 -59,000 218,000     157,000 137,000 103,000 160,000 271,000 231,000 240,000 338,000 347,000 220,000 161,000 281,000 
      income tax provision
                                 5,046,000 4,639,000 2,908,000 621,000 14,629,000 1,445,000 1,193,000 474,000 1,866,000 1,408,000 926,000 344,000 2,233,000 2,103,000 2,447,000 536,000 -573,000  257,000 1,187,000   722,000 555,000 548,000 309,000   581,000 206,000 540,000 297,000 733,000 287,000 -87,000 648,000 -26,000 
      cash dividends declared per common share
                                 0.225 0.3 0.3 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.15 0.15                    
      litigation benefit
                                                  274,000 -8,700,000 104,000 -257,000 -301,000                
      basic net income per share
                                                   0.23 0.2 0.15 0.07  0.17 0.19 0.09 0.08 0.16 0.1 0.05 0.18 0.37 0.18 0.18 0.11 0.36 0.09 
      diluted net income per share
                                                   0.23 0.19 0.14 0.07  0.16 0.18 0.08 0.078 0.16 0.1 0.05 0.17 0.35 0.17 0.17 0.103 0.34 0.09 
      weighted-average common shares outstanding:
                                                                      
      basic
    49,097 48,035 47,898 47,887 47,851 48,599 48,757 48,687 48,635 47,610 47,780 47,489 47,234 46,727 46,829 46,675 46,424 45,851 45,970 45,796 45,498 44,840 44,970 44,785 44,455 43,165 43,308 43,109 42,749 42,247 42,362 42,237 41,922 41,350 41,458 41,323 41,047 40,436 40,590 40,387 40,028 39,470 39,592 39,570 39,105 38,785 38,684 38,470 37,910 37,053 36,259 34,871 35,145 34,665 34,105  33,594 33,846 35,024        
      diluted
    49,242 48,309 48,042 48,019 48,006 48,835 48,964 48,945 48,928 48,771 48,792 48,756 48,655 48,358 48,349 48,286 48,250 47,889 47,852 47,754 47,711 47,014 46,955 46,831 46,670 45,763 45,833 45,483 45,232 44,602 44,669 44,400 44,282 43,578 43,486 43,397 43,268 41,915 41,895 41,716 41,646 40,869 40,689 40,745 40,596 39,727 39,608 39,517 39,009 38,239 37,708 36,247 36,438 35,997 35,538  34,240 34,903 36,105        
      includes stock-based compensation expense as follows:
                                                                      
      total stock-based compensation expense
                                                    5,231 5,190 4,660   3,829 3,315            
      interest income and other
                                                      -10,000 -10,000 156,000 359,000             
      includes stock-based compensation as follows:
                                                                      
      includes stock-based compensation expense
                                                         118 95            
      other income:
                                                                      
      total other income
                                                          106,000 99,000 3,000 24,000 183,000 160,000 81,000 334,000 347,000 146,000 85,000 96,000 
      income tax provision /
                                                           92,000 -419,000          
      interest and other expense
                                                              -88,000 -40,750 -159,000 -4,000  -88,750 -76,000 -185,000 
      litigation provision reversal
                                                                   -1,589,000 -6,356,000  
      weighted-average common shares outstanding
                                                           34,050    35,830 36,185 36,291 35,421 34,310 34,552 34,070 
      stock options
                                                               540.5 1,542 2,064 2,362    
      diluted weighted-average common equivalent shares outstanding
                                                           35,160    37,826 37,727 38,355 37,783 36,634 37,247 36,389 
      stock options and restricted stock
                                                                   51 2,695 2,319 
      provision for litigation expense
                                                                     2,233,000 
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-09-30 2014-06-30 2014-03-31 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 
                                                                       
        assets
                                                                       
        current assets:
                                                                       
        cash and cash equivalents
      1,062,930,000 1,099,302,000 1,081,251,000 787,382,000 637,354,000 691,816,000 700,347,000 550,475,000 488,273,000 527,843,000 421,178,000 506,959,000 488,972,000 288,607,000 316,210,000 342,867,000 260,604,000 189,265,000 226,091,000 220,210,000 218,368,000 334,944,000 179,466,000 156,483,000 154,880,000 172,960,000 205,229,000 197,012,000 181,769,000 172,704,000 131,094,000 83,075,000 76,016,000 82,759,000 104,424,000 71,110,000 76,826,000 112,703,000 109,479,000 82,046,000 77,808,000 90,860,000 76,616,000 80,868,000 95,966,000 101,812,000 107,863,000 88,885,000 101,735,000 93,287,000 75,104,000 78,247,000 81,644,000 78,731,000 96,371,000 92,972,000 97,685,000 74,062,000 48,010,000 44,275,000 48,962,000 48,865,000 46,717,000 51,993,000 56,816,000 
        short-term investments
      304,179,000 157,243,000 188,233,000 358,695,000 389,310,000 171,130,000 762,003,000 756,770,000 798,116,000 580,633,000 621,123,000 433,527,000 428,598,000 449,266,000 419,837,000 469,012,000 512,908,000 535,817,000 515,947,000 450,078,000 420,455,000 260,169,000 372,076,000 355,840,000 334,386,000 282,437,000 213,511,000 169,459,000 177,255,000 204,577,000 216,754,000 230,428,000 231,243,000 216,331,000 195,174,000 206,561,000 201,815,000 155,521,000 149,584,000 161,818,000 173,693,000 144,103,000 153,047,000 150,166,000 137,791,000 126,849,000 133,012,000 139,750,000 87,884,000 81,756,000 85,521,000 107,279,000 103,013,000 102,197,000 77,827,000 67,859,000 65,641,000 101,957,000 129,709,000 140,731,000 140,829,000 126,724,000 118,914,000 97,763,000 61,968,000 
        accounts receivable
      302,138,000 255,626,000 241,560,000 194,821,000 214,866,000 172,518,000 164,704,000 157,890,000 194,428,000 179,858,000 185,820,000 169,180,000 184,274,000 182,714,000 153,404,000 125,508,000 120,318,000 104,813,000 79,859,000 77,553,000 84,059,000 66,843,000 93,535,000 55,136,000 54,341,000 52,704,000 58,261,000 55,398,000 58,889,000 55,214,000 59,887,000 53,460,000 48,241,000 38,037,000 50,757,000 41,982,000 38,115,000 34,248,000 33,335,000 31,351,000 28,836,000 30,830,000 30,475,000 26,765,000 25,343,000 24,274,000 21,420,000 22,057,000 20,319,000 22,669,000  21,561,000 21,415,000 19,947,000 15,097,000 16,420,000 17,589,000 17,642,000 18,347,000 32,289,000 30,322,000 24,541,000 15,521,000 19,493,000 12,448,000 
        inventories
      619,159,000 564,649,000 505,680,000 490,642,000 454,793,000 419,611,000 424,942,000 426,751,000 395,990,000 383,702,000 397,288,000 427,432,000 430,830,000 447,290,000 397,435,000 359,647,000 311,040,000 259,417,000 208,062,000 177,322,000 175,223,000 157,062,000 148,096,000 152,119,000 131,499,000 127,500,000 135,634,000 143,622,000 142,543,000 136,384,000 136,790,000 128,909,000 111,897,000 99,281,000 99,887,000 92,666,000 78,535,000 71,469,000 70,692,000 69,919,000 62,318,000 63,209,000 67,309,000 64,964,000 53,396,000 41,587,000 41,198,000 39,829,000 40,268,000 34,949,000  32,623,000 29,455,000 21,547,000 20,104,000 23,558,000 24,715,000 23,117,000 25,789,000 19,459,000 14,458,000 14,550,000 19,616,000 20,358,000 20,082,000 
        other current assets
      42,689,000 106,982,000 96,021,000 87,217,000 92,063,000 109,978,000 108,454,000 105,547,000 99,685,000 147,463,000 109,967,000 95,253,000 89,955,000 42,742,000 36,571,000 35,055,000 42,266,000 35,540,000 34,535,000 24,917,000 24,325,000 22,980,000 25,970,000 29,286,000 29,679,000 19,605,000 16,660,000 19,645,000 13,629,000 11,931,000 12,876,000 13,974,000 16,707,000 12,762,000 13,560,000 14,894,000 11,045,000 9,043,000 3,720,000 3,980,000                          
        total current assets
      2,331,095,000 2,183,802,000 2,112,745,000 1,918,757,000 1,788,386,000 1,565,053,000 2,160,450,000 1,997,433,000 1,976,492,000 1,819,499,000 1,735,376,000 1,632,351,000 1,622,629,000 1,410,619,000 1,323,457,000 1,332,089,000 1,247,136,000 1,124,852,000 1,064,494,000 950,080,000 922,430,000 841,998,000 819,143,000 748,864,000 704,785,000 655,206,000 629,295,000 585,136,000 574,085,000 580,810,000 557,401,000 509,846,000 484,104,000 449,170,000 463,802,000 427,213,000 406,336,000 382,984,000 366,810,000 349,114,000 345,564,000 331,928,000 329,968,000 325,317,000 315,223,000 297,310,000 306,297,000 293,257,000 251,952,000 234,431,000  242,568,000 238,151,000 225,420,000 211,505,000 203,126,000 207,774,000 219,669,000 224,373,000 239,666,000 237,396,000 217,176,000 203,499,000 192,473,000 162,064,000 
        property and equipment
      693,864,000 627,689,000 597,311,000 563,885,000 527,348,000 494,945,000 436,265,000 400,534,000 375,573,000 368,952,000 358,226,000 341,911,000 354,313,000 357,157,000 343,123,000 356,687,000 369,374,000 362,962,000 340,060,000 332,093,000 297,741,000 281,528,000 270,310,000 251,980,000 236,807,000 228,315,000 217,043,000 213,830,000 205,497,000 150,001,000 147,497,000 150,658,000 153,770,000 144,636,000 100,629,000 100,562,000 85,617,000 85,171,000 82,097,000 74,293,000 66,527,000 65,359,000 60,088,000 62,163,000 64,256,000 63,428,000 64,447,000 65,897,000 67,281,000 62,871,000  59,883,000 59,584,000 51,437,000 47,794,000 47,608,000 37,433,000 37,326,000 37,262,000 32,461,000 27,253,000 21,696,000 17,968,000 17,012,000 16,326,000 
        acquisition-related intangible assets
      8,503,000 8,790,000 9,077,000 9,364,000 9,651,000 9,938,000 10,225,000 10,512,000 9,518,000                     111,000 308,000 504,000 701,000 951,000 1,464,000 1,977,000 2,489,000 3,002,000 3,515,000 4,027,000 4,540,000 5,053,000 5,566,000 6,078,000 6,445,000 7,178,000                    
        goodwill
      25,944,000 25,944,000 25,944,000 25,944,000 25,944,000 25,944,000 26,080,000 26,080,000 27,311,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000 6,571,000                    
        deferred tax assets
      1,182,845,000 1,182,883,000 1,300,260,000 1,309,981,000 1,318,457,000 1,326,840,000 30,697,000 29,707,000 32,784,000 28,054,000 23,676,000 35,755,000 35,571,000 35,252,000 23,905,000 23,961,000 22,848,000 21,917,000 17,726,000 17,699,000 17,668,000 18,556,000 13,486,000 13,432,000 13,821,000 17,193,000 16,619,000 16,686,000 16,779,000 16,830,000 12,852,000 15,791,000 15,840,000 15,917,000 661,000 650,000 641,000 633,000 644,000 644,000 663,000 672,000 1,031,000 1,053,000 1,052,000                     
        other long-term assets
      206,615,000 165,091,000 161,055,000 144,279,000 135,974,000 194,377,000 191,023,000 183,866,000 157,023,000 211,277,000 204,240,000 204,032,000 207,567,000 249,286,000 234,165,000 66,385,000 68,052,000 69,523,000 67,050,000 66,548,000 63,782,000 59,838,000 48,868,000 47,276,000 42,463,000 45,952,000 43,343,000 42,675,000 41,987,000 35,868,000 33,271,000 31,335,000 31,531,000 30,068,000 26,518,000 25,725,000 29,808,000 27,411,000 29,837,000 28,698,000 17,894,000 16,341,000 11,491,000 11,066,000 10,689,000 7,940,000 5,586,000 5,159,000                  
        total assets
      4,448,866,000 4,194,199,000 4,206,392,000 3,972,210,000 3,805,760,000 3,617,097,000 2,854,740,000 2,648,132,000 2,578,701,000 2,434,353,000 2,328,089,000 2,220,620,000 2,226,651,000 2,058,885,000 1,931,221,000 1,785,693,000 1,713,981,000 1,585,825,000 1,495,901,000 1,372,991,000 1,308,192,000 1,208,491,000 1,161,294,000 1,071,155,000 1,007,504,000 956,375,000 916,135,000 868,113,000 848,209,000 793,432,000 763,157,000 719,952,000 697,767,000 652,569,000 605,013,000 568,046,000 536,804,000 511,126,000 494,856,000 468,641,000 447,112,000 431,285,000 420,079,000 417,623,000 409,630,000 392,699,000 386,654,000 374,632,000 332,594,000 310,791,000 287,162,000 315,269,000 310,074,000 291,180,000 273,867,000 267,162,000 263,160,000 275,010,000 281,603,000 292,432,000 285,050,000 259,315,000 241,821,000 229,407,000 216,481,000 
        liabilities and stockholders’ equity
                                                                       
        current liabilities:
                                                                       
        accounts payable
      174,499,000 138,272,000 141,689,000 129,919,000 127,310,000 102,526,000 115,865,000 99,894,000 103,471,000 62,958,000 64,707,000 70,614,000 58,001,000 61,461,000 78,673,000 77,925,000 71,572,000 83,027,000 72,092,000 58,882,000 57,235,000 38,169,000 48,142,000 45,169,000 37,752,000 27,271,000 30,318,000 26,544,000 27,259,000 22,678,000 27,603,000 26,689,000 27,511,000 22,813,000 21,831,000 25,232,000 22,637,000 17,427,000 17,332,000 19,140,000 15,731,000 13,487,000 15,661,000 16,596,000 19,900,000 14,793,000 13,759,000 11,748,000 14,954,000 13,256,000  11,405,000 17,701,000 14,573,000 8,904,000 9,515,000 10,929,000 10,505,000 8,979,000 17,755,000 11,001,000 11,681,000 7,787,000 8,867,000 10,280,000 
        accrued compensation and related benefits
      98,768,000 85,963,000 99,602,000 81,296,000 74,785,000 63,918,000 81,292,000 63,917,000 70,541,000 56,286,000 64,634,000 66,817,000 101,881,000 88,260,000 103,253,000 85,238,000 89,869,000 62,635,000 75,815,000 55,279,000 56,307,000 45,840,000 48,362,000 32,785,000 18,633,000 26,164,000 28,724,000 22,960,000 18,969,000 18,799,000 22,996,000 15,604,000 13,060,000 15,597,000 17,458,000 14,561,000 10,454,000 12,578,000 16,311,000 14,116,000 9,552,000 9,812,000 14,256,000 11,236,000 7,366,000 6,607,000 12,606,000 10,332,000 10,085,000 6,875,000  5,959,000 11,035,000 6,746,000 9,321,000 6,625,000 8,042,000 5,723,000 8,792,000 7,094,000 9,388,000 6,481,000 8,454,000 6,351,000 7,128,000 
        other accrued liabilities
      213,691,000 145,130,000 201,513,000 172,293,000 161,306,000 128,123,000 139,431,000 131,348,000 137,868,000 115,791,000 120,677,000 113,410,000 155,961,000 113,679,000 109,062,000 91,324,000 111,087,000 81,282,000 79,756,000 68,570,000 74,367,000 62,960,000 61,774,000 58,831,000 56,110,000 44,790,000 45,984,000 38,616,000 45,348,000                                     
        total current liabilities
      486,958,000 369,365,000 442,804,000 383,508,000 363,401,000 294,567,000 336,588,000 295,159,000 311,880,000 235,035,000 250,018,000 250,841,000 315,843,000 263,400,000 290,988,000 254,487,000 272,528,000 226,944,000 227,663,000 182,731,000 187,909,000 146,969,000 158,278,000 136,785,000 112,495,000 98,225,000 105,026,000 88,120,000 91,576,000 80,439,000 85,507,000 75,326,000 73,301,000 65,917,000 66,168,000 62,786,000 56,008,000 52,921,000 55,516,000 52,111,000 45,323,000 43,283,000 48,620,000 46,234,000 45,892,000 36,928,000 41,970,000 30,639,000 32,613,000 27,810,000  24,864,000 35,584,000 31,469,000 26,070,000 25,089,000 31,009,000 26,740,000 28,970,000 33,412,000 29,505,000 25,455,000 23,922,000 23,259,000 31,670,000 
        income tax liabilities
      75,022,000 75,022,000 78,261,000 73,185,000 69,535,000 65,193,000 64,656,000 60,440,000 66,337,000 60,724,000 55,806,000 54,032,000 56,900,000 53,509,000 49,963,000 47,350,000 49,782,000 47,669,000 41,019,000 38,498,000 37,062,000 37,062,000 35,624,000 35,624,000 37,596,000 37,596,000 32,402,000 32,402,000 34,375,000 34,375,000 31,173,000 30,735,000 31,900,000 31,621,000 4,627,000 4,303,000 4,111,000 3,870,000 3,594,000 3,328,000 3,114,000 2,941,000    4,746,000 5,758,000 5,652,000                  
        deferred tax liabilities
      90,316,000 90,480,000                                                                
        other long-term liabilities
      119,160,000 127,835,000 117,380,000 113,449,000 105,814,000 111,570,000 101,806,000 96,675,000 86,927,000 88,655,000 77,401,000 76,658,000 77,647,000 73,374,000 59,561,000 60,734,000 65,559,000 67,227,000 64,506,000 64,407,000 61,644,000 57,873,000 52,823,000 49,801,000 44,223,000 47,063,000 44,279,000 43,437,000 42,007,000 38,525,000 36,313,000 34,871,000 34,260,000 33,024,000 28,695,000 27,164,000 25,557,000 23,219,000 19,448,000 18,062,000 16,689,000 16,545,000 14,117,000 13,609,000 12,270,000 9,364,000 4,298,000 3,674,000          3,000 723,000 756,000 662,000 58,000 27,000 8,000 9,000 
        total liabilities
      771,456,000 662,702,000 638,445,000 570,142,000 538,750,000 471,330,000 503,050,000 452,274,000 465,144,000 384,414,000 383,225,000 381,531,000 450,390,000 390,283,000 400,512,000 362,571,000 387,869,000 341,840,000 333,188,000 285,636,000 286,615,000 241,904,000 246,725,000 222,210,000 194,314,000 182,884,000 181,707,000 163,959,000 167,958,000 153,339,000 152,993,000 140,932,000 139,461,000 130,562,000 99,490,000 94,253,000 85,676,000 80,010,000 78,558,000 73,501,000 65,126,000 62,769,000 65,966,000 62,861,000 64,178,000 51,038,000 52,026,000 39,965,000 38,632,000 34,480,000  30,205,000 40,833,000 36,399,000 30,990,000 30,109,000 36,030,000 31,761,000 34,708,000 39,083,000 35,082,000 30,428,000 28,864,000 28,065,000 36,464,000 
        commitments and contingencies
                                                                       
        stockholders’ equity:
                                                                       
        common stock and additional paid-in capital: 0.001 par value...
      983,926,000 936,998,000 885,123,000 822,582,000 764,959,000 706,817,000 1,274,127,000 1,224,144,000 1,176,382,000 1,129,937,000 1,092,569,000 1,055,130,000 1,017,131,000 975,276,000 938,993,000 891,888,000 847,966,000 803,226,000 769,858,000 733,672,000 699,359,000 657,701,000 632,432,000 605,165,000 581,736,000 549,517,000 528,775,000                                       
        retained earnings
      2,703,596,000 2,609,651,000 2,705,527,000 2,603,177,000 2,545,375,000 2,487,461,000 1,098,759,000 1,016,208,000 977,724,000 947,064,000 899,398,000 827,356,000 777,075,000 716,403,000 633,640,000 545,920,000 467,844,000 424,879,000 381,193,000 341,382,000 315,206,000 298,746,000 279,653,000 247,864,000 241,465,000 229,450,000 215,692,000 204,533,000 202,378,000 194,728,000 180,819,000 162,859,000 152,257,000 143,608,000 140,455,000 125,726,000 119,613,000 119,362,000 111,535,000 105,883,000 103,362,000 101,287,000 99,731,000 97,023,000 97,619,000 97,398,000 92,269,000 91,956,000 68,029,000 62,539,000  95,456,000 89,535,000 82,943,000 79,948,000 77,495,000 72,022,000 68,540,000 66,647,000 63,066,000 49,848,000 43,440,000 37,085,000 32,431,000 19,869,000 
        accumulated other comprehensive loss
      -10,112,000 -15,152,000 -22,703,000 -23,691,000 -43,324,000 -48,511,000 -21,196,000 -44,494,000 -40,549,000 -27,062,000 -47,103,000 -43,397,000 -17,945,000           -4,084,000 -10,011,000 -5,476,000 -10,039,000 -4,138,000 -1,040,000       -1,380,000 -2,707,000                             
        total stockholders’ equity
      3,677,410,000 3,531,497,000 3,567,947,000 3,402,068,000 3,267,010,000 3,145,767,000 2,351,690,000 2,195,858,000 2,113,557,000 2,049,939,000 1,944,864,000 1,839,089,000 1,776,261,000 1,668,602,000 1,530,709,000 1,423,122,000 1,326,112,000 1,243,985,000 1,162,713,000 1,087,355,000 1,021,577,000 966,587,000 914,569,000 848,945,000 813,190,000 773,491,000 734,428,000 704,154,000 680,251,000 640,093,000 610,164,000 579,020,000 558,306,000 522,007,000 505,523,000 473,793,000 451,128,000 431,116,000 416,298,000 395,140,000 381,986,000 368,516,000 354,113,000 354,762,000 345,452,000 341,661,000 334,628,000 334,667,000 293,962,000 276,311,000  285,064,000 269,241,000 254,781,000 242,877,000 237,053,000 227,130,000 243,249,000 246,895,000 253,349,000 249,968,000 228,887,000 212,957,000 201,342,000 180,017,000 
        total liabilities and stockholders’ equity
      4,448,866,000 4,194,199,000 4,206,392,000 3,972,210,000 3,805,760,000 3,617,097,000 2,854,740,000 2,648,132,000 2,578,701,000 2,434,353,000 2,328,089,000 2,220,620,000 2,226,651,000 2,058,885,000 1,931,221,000 1,785,693,000 1,713,981,000 1,585,825,000 1,495,901,000 1,372,991,000 1,308,192,000 1,208,491,000 1,161,294,000 1,071,155,000 1,007,504,000 956,375,000 916,135,000 868,113,000 848,209,000 793,432,000 763,157,000 719,952,000 697,767,000 652,569,000 605,013,000 568,046,000 536,804,000 511,126,000 494,856,000 468,641,000 447,112,000 431,285,000 420,079,000 417,623,000 409,630,000 392,699,000 386,654,000 374,632,000 332,594,000 310,791,000  315,269,000 310,074,000 291,180,000 273,867,000 267,162,000 263,160,000 275,010,000 281,603,000 292,432,000 285,050,000 259,315,000 241,821,000 229,407,000 216,481,000 
        accumulated other comprehensive income
                   -23,077,000 -41,924,000 -14,686,000 10,302,000 15,880,000 11,662,000 12,301,000 7,012,000 10,140,000 2,484,000       -5,543,000 -5,740,000 -1,705,000 5,042,000 1,813,000 342,000   -4,215,000 63,000 128,000 2,174,000 1,466,000 3,084,000 6,186,000 6,096,000 5,661,000 5,840,000 5,652,000 5,285,000 4,456,000  4,025,000 4,082,000 4,065,000 3,593,000 3,394,000 2,979,000 2,266,000 1,979,000 1,443,000 790,000 587,000 354,000 439,000 303,000 
        long-term investments
                            2,916,000 3,032,000 3,057,000 3,138,000 3,264,000 3,215,000 3,290,000 3,241,000 5,257,000 5,247,000 5,250,000 5,256,000 5,368,000 5,348,000 5,342,000 5,354,000 5,382,000 5,294,000 5,353,000 5,361,000 5,364,000 5,375,000 5,394,000 9,795,000 9,848,000 9,843,000 11,698,000 11,715,000 11,755,000 11,756,000 11,714,000 13,665,000 13,675,000 15,720,000 17,220,000 17,270,000 19,180,000 19,415,000 19,495,000 19,555,000 19,445,000 19,465,000 37,635,000 
        stockholders’ equity:
                                                                       
        stockholders' equity:
                                                                       
        common stock and additional paid-in capital: 0.001 par value...
                                 503,759,000                                      
        common stock and additional paid-in capital, 0.001 par value...
                                  478,913,000 450,908,000 435,085,000 417,866,000 401,007,000 376,586,000 364,726,000 349,447,000 334,222,000 315,969,000 304,700,000 289,129,000 276,450,000 265,763,000                        
        revenue
                                  141,363,000 582,382,000 159,975,000 139,761,000 129,150,000  128,939,000 112,198,000                              
        cost of revenue
                                  63,357,000 259,714,000 70,957,000 62,197,000 57,655,000  58,083,000 50,773,000                              
        gross profit
                                  78,006,000 322,668,000 89,018,000 77,564,000 71,495,000  70,856,000 61,425,000                              
        operating expenses:
                                                                       
        research and development
                                  25,458,000 93,455,000 25,630,000 23,481,000 21,609,000  21,442,000 20,292,000                              
        selling, general and administrative
                                  30,553,000 113,803,000 29,552,000 28,561,000 27,318,000  25,255,000 25,873,000                              
        litigation expense
                                  278,000  343,000 640,000 531,000  327,000                               
        total operating expenses
                                  56,289,000 209,180,000 55,525,000 52,682,000 49,458,000  47,024,000 46,455,000                              
        income from operations
                                  21,717,000 113,488,000 33,493,000 24,882,000 22,037,000  23,832,000 14,970,000                              
        interest and other income
                                  3,341,000 4,994,000 2,714,000 2,232,000 440,000  1,255,000 1,237,000                              
        income before income taxes
                                  25,058,000 118,482,000 36,207,000 27,114,000 22,477,000  25,087,000 16,207,000                              
        income tax benefit
                                  -1,123,000                                     
        net income
                                  26,181,000 105,268,000 31,568,000 24,206,000 21,856,000  23,642,000 15,014,000                              
        net income per share
                                                                       
        basic
                                  610 2,490 750 570 520  570 360                              
        diluted
                                  580 2,360 710 550 490  540 350                              
        weighted-average shares outstanding:
                                                                       
        accrued liabilities
                                   38,962,000 34,908,000 33,033,000 32,730,000 27,507,000 26,879,000 22,993,000 22,917,000 22,916,000 21,873,000 18,855,000 20,040,000 19,984,000 18,703,000 18,402,000 18,626,000 15,528,000 15,605,000 8,559,000 7,574,000 7,679,000  7,500,000 6,848,000 10,150,000 7,845,000 8,949,000 12,038,000 10,512,000 11,199,000 8,563,000 9,116,000 7,293,000 7,681,000 8,041,000 14,262,000 
        litigation benefit
                                   1,922,000      290,000                              
        income tax provision
                                   13,214,000 4,639,000 2,908,000 621,000  1,445,000 1,193,000                              
        cash dividends declared per common share
                                    300 300 300  200 200                              
        prepaid expenses and other current assets
                                              2,909,000 2,926,000 2,521,000 2,554,000 2,727,000 2,788,000 2,509,000 2,444,000 1,731,000 1,764,000  2,214,000 1,978,000 2,352,000 1,685,000 1,993,000 1,692,000 2,686,000 2,314,000 2,904,000 2,820,000 2,491,000 2,726,000 2,790,000 3,325,000 
        deferred tax and other tax liabilities
                                                3,229,000 3,018,000 6,016,000                     
        common stock, 0.001 par value...
                                                251,298,000 251,553,000 241,737,000 238,602,000 236,519,000 237,059,000 220,648,000 209,316,000  185,583,000 175,624,000 167,773,000 159,336,000 156,164,000 152,129,000 172,443,000 178,269,000 188,840,000 199,330,000 184,860,000 175,518,000 168,472,000 159,845,000 
        deferred income tax assets
                                                   477,000 295,000 292,000                  
        deferred income tax assets, net - current
                                                      15,000 6,000  644,000 646,000 646,000 421,000 324,000 452,000 205,000 204,000 8,000  5,000  76,000 75,000 
        deferred income tax assets, net - long-term
                                                      669,000 669,000  19,000 19,000 19,000 239,000 39,000 39,000 39,000 39,000 175,000  175,000  19,000 19,000 
        other assets
                                                      994,000 1,105,000  1,043,000 606,000 639,000 654,000 669,000 694,000 706,000 749,000 715,000 731,000 713,000 734,000 431,000 430,000 
        long-term liabilities
                                                      1,000,000 1,250,000                
        non-current income tax liabilities
                                                      5,019,000 5,420,000  5,341,000 5,249,000 4,930,000 4,920,000 5,020,000          
        restricted cash
                                                                      7,350,000 
        working capital
                                                        190,841,000               
        long-term tax liabilities
                                                        5,408,000               
        common stock
                                                        194,079,000               
        total stockholders' equity
                                                        258,294,000               
        cash dividend per common share:
                                                                       
        declared
                                                        1,000               
        paid
                                                        1,000               
        non-current income tax liability
                                                              5,021,000 5,018,000 5,015,000 4,915,000 4,915,000 4,915,000 4,915,000 4,798,000 4,785,000 
        deferred income tax assets, net – current
                                                                  5,000     
        deferred income tax assets, net – long-term
                                                                  175,000     
        deferred income tax assets, net—current
                                                                    5,000   
        deferred income tax assets, net—long-term
                                                                    175,000   
        restricted assets
                                                                     7,000 7,000 
      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 2014-09-30 2014-06-30 2014-03-31 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 
                                                                         
          cash flows from operating activities:
                                                                         
          net income
        193,226,000 175,692,000 178,274,000 133,726,000 133,791,000 1,449,363,000 144,430,000 100,366,000 92,541,000 96,905,000 121,163,000 99,504,000 109,802,000 119,090,000 124,337,000 114,679,000 79,566,000 72,671,000 68,770,000 55,169,000 45,413,000 42,887,000 55,566,000 30,166,000 35,756,000 32,437,000 29,528,000 20,693,000 26,181,000 27,638,000 31,568,000 24,206,000 21,856,000 12,071,000 23,642,000 15,013,000 14,477,000 16,574,000 14,373,000 11,198,000 10,575,000 10,109,000 11,201,000 7,899,000 5,963,000 11,220,000 6,397,000 9,018,000 7,410,000 5,490,000 2,499,000  5,921,000 6,592,000 2,995,000 2,453,000 5,473,000 3,482,000 1,893,000 3,581,000 13,219,000 6,407,000 6,356,000 4,654,000  
          adjustments to reconcile net income to net cash from operating activities:
                                                                         
          depreciation and amortization
        15,106,000 14,243,000 13,701,000 13,120,000 11,449,000 10,043,000 9,445,000 8,691,000 8,251,000 10,228,000 10,000,000 9,953,000 9,987,000 8,765,000 9,674,000 9,560,000 9,115,000 8,323,000 7,727,000 7,120,000 5,529,000 5,401,000 4,956,000 4,501,000 4,328,000 4,050,000 3,823,000 3,739,000 3,255,000              3,386,000 3,471,000 3,621,000 3,388,000 3,118,000 3,182,000 3,249,000 3,002,000 2,709,000  2,413,000 2,269,000 2,184,000 2,182,000 2,175,000 2,105,000 2,270,000 2,392,000 2,020,000 1,881,000 1,723,000 1,706,000 1,718,000 
          loss on deferred compensation plan investments
        1,588,000    1,350,000     -5,094,000 1,611,000 -2,488,000 -2,534,000 -2,007,000 1,330,000 5,085,000 2,192,000   -1,862,000 -1,177,000   -3,572,000 3,750,000    -1,935,000    66,000                                 
          deferred taxes
        -152,000 12,958,000 9,696,000 8,609,000 8,431,000 -1,296,313,000 -777,000 -6,069,000 248,000 -5,062,000 11,911,000 -362,000 -622,000 -12,003,000 166,000 -1,002,000 -381,000 -3,776,000 -1,000 1,000 1,004,000 -5,027,000 -12,000 3,412,000 -559,000 2,000 13,000 -33,000 -4,012,000 3,157,000       -17,000 1,000 11,000                         
          stock-based compensation expense
        41,098,000 53,910,000 60,677,000 60,098,000 52,806,000 56,010,000 51,398,000 52,306,000 45,926,000 41,108,000 33,602,000 37,992,000 37,009,000 35,269,000 42,997,000 42,915,000 39,811,000 31,197,000 31,572,000 32,127,000 28,583,000 22,970,000 22,975,000 21,044,000 18,562,000 18,680,000 21,300,000 22,709,000 16,010,000 14,842,000 14,844,000 15,891,000 15,030,000 11,858,000 13,970,000 15,127,000 11,662,000 10,748,000 13,515,000 11,747,000 8,979,000                         
          other
        -696,000 -347,000 -419,000 9,000 20,000 -22,000 -27,000 140,000 -63,000    82,000 10,000 5,000 118,000 -13,000 5,000                                             
          changes in operating assets and liabilities:
                                                                         
          accounts receivable
        -46,512,000 -14,033,000 -46,769,000 20,074,000 -42,338,000 -7,823,000 -6,803,000 36,529,000 -14,578,000 5,987,000 -16,647,000 15,102,000 -1,558,000 -29,295,000 -27,898,000 -5,204,000 -15,506,000 -24,943,000 -2,314,000 6,517,000 -17,236,000 26,703,000 -38,398,000 -793,000 -1,635,000 5,560,000 -2,872,000 3,500,000 -3,676,000 4,673,000 -6,427,000 -5,222,000 -11,103,000 12,720,000 -8,776,000 -3,864,000 -3,865,000 -918,000 -1,983,000 -2,518,000 1,998,000 -356,000 -3,711,000 -1,420,000 286,000 -2,826,000 637,000 1,673,000 -1,637,000 2,349,000 -3,285,000  -146,000 -1,469,000 -4,849,000 1,323,000 1,169,000 53,000 705,000 13,941,000 -1,967,000 -5,781,000 -9,019,000 3,972,000 -7,046,000 
          inventories
        -54,507,000 -59,020,000 -15,039,000 -35,838,000 -35,180,000 5,320,000 1,815,000 -30,754,000 -11,596,000 13,594,000 30,142,000 3,784,000 16,063,000 -49,832,000 -37,807,000 -48,637,000 -51,797,000 -51,355,000 -30,731,000 -2,086,000 -18,151,000 -8,970,000 4,047,000 -20,586,000 -3,994,000 8,111,000 7,959,000 -1,034,000 -6,171,000 436,000 -7,894,000 -17,012,000 -12,590,000 589,000 -7,226,000 -14,101,000 -7,057,000 -801,000 -764,000 -7,609,000 851,000 4,168,000 -2,349,000 -11,562,000 -12,467,000 -343,000 -1,376,000 -81,000 -2,711,000 -5,304,000 -2,836,000  -3,169,000 -7,907,000 -1,443,000 3,459,000 1,158,000 -1,597,000 2,679,000 -6,388,000 -4,974,000 112,000 5,066,000 731,000 -275,000 
          other assets
        17,525,000 -13,053,000 -10,223,000 5,390,000 78,005,000 -3,237,000 -2,809,000 -13,887,000 74,477,000 -2,887,000 -16,542,000 -5,094,000 213,000 -5,234,000 -172,101,000 5,967,000 -5,916,000 -1,260,000 -9,942,000 -1,894,000 -2,215,000 3,373,000 3,625,000 60,000 -10,061,000 -4,355,000 -5,807,000 1,534,000 -1,576,000 -410,000 318,000 2,971,000 -3,954,000 -93,000 2,863,000 298,000 -1,465,000 -152,000 -452,000                           
          accounts payable
        29,730,000 7,338,000 -2,726,000 15,331,000 21,296,000 -21,041,000 13,485,000 -5,209,000 35,934,000 -2,118,000 -5,738,000 13,533,000 -880,000 -17,514,000 136,000 10,315,000 -4,177,000 2,894,000 17,241,000 -722,000 13,513,000 -9,401,000 4,322,000 8,304,000 7,185,000 -4,125,000 5,020,000 -2,625,000 4,778,000 -5,107,000 2,946,000 -824,000 3,856,000 -1,922,000 -2,756,000 2,828,000 4,927,000 -230,000 -1,463,000 3,834,000 3,342,000 -3,398,000 -1,142,000 -2,215,000 6,902,000 896,000 1,910,000 1,058,000 -2,893,000 1,922,000 2,135,000  -3,567,000 1,814,000 4,098,000 -1,669,000 -1,350,000 763,000 1,299,000 -7,763,000 5,716,000 1,170,000 2,032,000 -1,099,000 422,000 
          accrued compensation and related benefits
        12,576,000 -14,039,000 18,282,000 4,975,000 10,609,000 -15,707,000 16,097,000 -6,345,000 14,698,000 -8,832,000 -1,742,000 -34,035,000 13,422,000 -16,540,000 20,528,000 -2,856,000 27,382,000 -13,494,000 20,632,000 -1,211,000 10,609,000 -3,256,000 15,007,000 14,147,000 -7,374,000 -2,832,000 6,204,000 4,120,000 4,000 -4,032,000 7,735,000 2,924,000 -2,821,000 -2,145,000 2,809,000 3,984,000 -2,251,000 -3,413,000 2,163,000 4,656,000 -270,000 -4,381,000 3,236,000 3,839,000 -1,626,000 -5,962,000 2,236,000 -63,000 -3,394,000 3,214,000 -822,000  -5,088,000 4,310,000 -2,602,000 2,672,000 -1,365,000 2,276,000 -3,094,000 1,681,000 -2,384,000 2,954,000 -1,956,000 2,103,000 -841,000 
          income tax liabilities
        25,973,000 -51,690,000 19,886,000 12,327,000 21,471,000 -119,000 5,886,000 4,448,000 3,011,000 12,489,000 2,005,000 -34,939,000 20,137,000 10,825,000 7,485,000 -17,768,000 16,017,000 7,683,000 2,448,000 -160,000 1,800,000 2,552,000 -1,744,000 -95,000 34,000 4,831,000 441,000 -5,136,000 -1,491,000 6,395,000 -1,018,000 3,782,000 -2,236,000 28,098,000 1,171,000 831,000 -753,000 1,497,000 1,273,000 421,000 -26,000 2,086,000 790,000                       
          other accrued liabilities
        15,298,000 -4,830,000 18,730,000 7,513,000 -4,555,000 -5,112,000 10,102,000 7,942,000 7,344,000 681,000 7,813,000 -11,137,000 17,508,000 9,986,000 11,784,000 -9,059,000 9,760,000 628,000 10,708,000 2,834,000 8,567,000 5,680,000 7,773,000 5,535,000 963,000                                         
          net cash from operating activities
        250,253,000 104,910,000 239,268,000 237,637,000 256,387,000 167,681,000 231,703,000 140,975,000 248,051,000 153,313,000 175,908,000 90,185,000 218,807,000 52,203,000 -18,185,000 105,237,000 107,419,000 28,206,000 117,801,000 96,946,000 77,057,000 79,648,000 77,406,000 59,330,000 51,419,000 60,986,000 72,424,000 44,057,000 38,836,000 47,590,000 52,151,000 25,418,000 16,292,000 53,373,000 33,678,000 24,878,000 21,892,000 30,999,000 32,919,000 14,998,000 28,870,000 24,337,000 22,050,000 7,668,000 15,681,000 16,009,000 25,603,000 11,985,000 8,021,000 15,513,000 6,704,000  1,158,000 6,073,000 6,219,000 13,266,000 8,905,000 13,284,000 8,230,000 10,243,000 15,500,000 14,518,000 8,233,000 16,134,000 4,195,000 
          capital expenditures
        -70,849,000 -41,013,000 -42,515,000 -48,143,000 -40,342,000 -64,802,000 -33,818,000 -31,507,000 -15,991,000 -13,806,000 -27,091,000 -7,827,000 -8,854,000 -12,841,000 -7,281,000 -11,844,000 -26,877,000 -17,596,000 -18,581,000 -39,298,000 -18,970,000 -11,481,000 -19,622,000 -14,584,000 -9,952,000 -8,677,000 -9,491,000 -19,262,000 -58,376,000  
          free cash flows
        179,404,000 63,897,000 196,753,000 189,494,000 216,045,000 102,879,000 197,885,000 109,468,000 232,060,000 139,507,000 148,817,000 82,358,000 209,953,000 39,362,000 -25,466,000 93,393,000 80,542,000 10,610,000 99,220,000 57,648,000 58,087,000 68,167,000 57,784,000 44,746,000 41,467,000 52,309,000 62,933,000 24,795,000 -19,540,000 47,590,000 52,151,000 25,418,000 16,292,000 53,373,000 33,678,000 24,878,000 21,892,000 30,999,000 32,919,000 14,998,000 28,870,000 24,337,000 22,050,000 7,668,000 15,681,000 16,009,000 25,603,000 11,985,000 8,021,000 15,513,000 6,704,000  1,158,000 6,073,000 6,219,000 13,266,000 8,905,000 13,284,000 8,230,000 10,243,000 15,500,000 14,518,000 8,233,000 16,134,000 4,195,000 
          cash flows from investing activities:
                                                                         
          purchases of property and equipment
        -70,849,000 -41,013,000 -42,515,000 -48,143,000 -40,342,000 -64,802,000 -33,818,000 -31,507,000 -15,991,000 -13,806,000 -27,091,000 -7,827,000 -8,854,000 -12,841,000 -7,281,000 -11,844,000 -26,877,000 -17,596,000 -18,581,000 -39,298,000 -18,970,000 -11,481,000 -19,622,000 -14,584,000 -9,952,000 -8,677,000 -9,491,000 -19,262,000 -58,376,000                                     
          sales of property and equipment
        6,422,000                                                                 
          purchases of investments
        -161,809,000 -1,896,000 -2,523,000 -35,377,000 -357,633,000 -141,255,000 -351,836,000 -223,759,000 -365,856,000 -89,965,000 -281,231,000 -82,086,000 -129,321,000                                                     
          maturities and sales of investments
        14,437,000 34,938,000 173,413,000 70,162,000 141,065,000 728,274,000 359,347,000 270,748,000 149,766,000 140,127,000 95,975,000 79,508,000 152,698,000                                                     
          contributions to deferred compensation plan
        -523,000 -3,180,000 -282,000 -440,000 -575,000 -3,042,000 -455,000 -659,000 -650,000 -2,387,000 -611,000 -1,646,000 -2,209,000 -13,499,000 -718,000 -1,515,000 -760,000 -625,000 -231,000 -810,000 -876,000 -1,580,000 -341,000 -337,000 -438,000 -1,285,000 -362,000 -479,000 -956,000 -2,750,000 -485,000 389,000 -1,300,000 -3,137,000 -530,000                               
          net cash from investing activities
        -212,322,000 -11,551,000 127,565,000 -15,798,000 -257,485,000 519,175,000 -26,762,000 -3,351,000 -266,015,000 33,969,000   12,314,000 -50,179,000 31,000,000 18,282,000 -11,613,000 -39,748,000 -86,930,000 -69,342,000 -182,866,000 94,260,000 -37,316,000 -31,663,000 -64,458,000 -79,003,000 -46,039,000 -11,289,000 -30,781,000 7,055,000 8,057,000 -4,650,000 -25,202,000 -66,232,000 5,883,000 -22,468,000 -51,243,000 -18,054,000 714,000 -2,560,000 -35,826,000 -3,706,000 -6,360,000 -15,024,000 -32,107,000 -9,724,000 2,831,000 -19,241,000 -9,021,000 -13,611,000 250,000  -10,295,000 -7,137,000 -29,190,000 -10,190,000 -14,179,000 34,035,000 26,556,000 6,719,000 -5,791,000 -23,295,000 -11,384,000 -24,320,000 -14,593,000 
          cash flows from financing activities:
                                                                         
          property and equipment purchased on extended payment terms
        -2,697,000 -494,000 -204,000 -659,000 -1,243,000 -1,433,000 -644,000 -1,032,000 -978,000 -94,000 -1,540,000 -818,000 -374,000 -468,000 -397,000 -662,000 -528,000 -785,000 -909,000 -577,000 -563,000 -920,000 -376,000 -3,782,000 -279,000 -479,000 -201,000 7,000 -10,000     -250,000 -150,000   -150,000                      
          proceeds from common stock issued
        5,830,000                                                                 
          dividends and dividend equivalents paid
        -78,399,000 -74,819,000 -74,905,000 -75,065,000 -60,008,000 -61,857,000 -61,158,000 -68,055,000 -49,553,000 -50,579,000 -49,402,000 -49,138,000 -36,725,000 -36,401,000 -36,270,000 -36,469,000 -28,825,000 -28,639,000 -28,503,000 -28,755,000 -23,467,000 -23,309,000 -23,210,000 -24,840,000 -17,427,000 -18,653,000 -17,857,000 -18,023,000 -12,761,000 -13,094,000 -12,914,000 -13,128,000 -8,339,000 -8,662,000 -8,449,000 -8,636,000 -8,179,000 -8,465,000 -8,154,000 -8,506,000 -7,974,000 -8,112,000 -8,011,000 -7,983,000 -5,859,000                     
          net cash from financing activities
        -75,266,000 -77,296,000 -73,240,000 -79,411,000 -55,916,000 -685,374,000 -63,215,000 -73,637,000 -50,001,000 -54,414,000 -47,107,000 -49,952,000 -32,252,000 -35,856,000 -32,562,000 -36,118,000 -24,249,000 -27,249,000 -24,808,000 -27,156,000 -10,993,000 -21,919,000 -19,312,000 -26,270,000 -4,056,000 -17,043,000 -14,318,000 -15,928,000 -761,000 -12,890,000 -10,532,000 -12,170,000 1,033,000 -8,641,000 -7,130,000 -8,568,000 -6,986,000 -8,075,000 -6,108,000 -7,719,000 -6,225,000 -6,238,000 -18,742,000 -7,821,000 -13,851,000 -12,192,000 -9,619,000 -4,751,000 9,475,000 6,213,000 11,138,000  5,776,000 4,023,000 5,121,000 245,000 588,000 -23,988,000 -8,820,000 -13,598,000 -14,676,000 8,911,000 5,316,000 2,876,000 5,462,000 
          effect of change in exchange rates
        961,000 2,065,000 276,000 7,614,000 2,555,000 -10,022,000 8,155,000 -1,785,000 -4,818,000 7,013,000 -1,627,000 -10,193,000 1,497,000 6,236,000 -6,913,000 -5,142,000 -220,000 1,969,000 -184,000 1,397,000 218,000 3,494,000 2,209,000 208,000 -985,000 1,633,000 -2,691,000 -1,595,000 1,770,000 -146,000 -1,655,000 -1,544,000 1,137,000 -165,000 883,000 442,000 460,000 -1,646,000 -92,000 -481,000 129,000 -149,000 -1,200,000 79,000 -23,000 -144,000 163,000 -321,000 236,000 333,000 91,000  -36,000 -46,000 210,000 78,000 -27,000 292,000 86,000 371,000 280,000 -37,000 -17,000   
          net decrease in cash, cash equivalents and restricted cash
        -36,374,000    -54,459,000               1,845,000 -116,584,000            -6,740,000                                 
          cash, cash equivalents and restricted cash, beginning of period
        1,099,521,000 691,941,000 561,181,000 288,729,000 189,389,000 335,071,000 173,076,000 172,818,000 82,874,000                                 
          cash, cash equivalents and restricted cash, end of period
        1,063,147,000 18,128,000 293,869,000 150,042,000 637,482,000 -8,540,000 149,881,000 62,202,000 488,398,000 139,881,000 -85,784,000 17,989,000 489,095,000 -27,596,000 -26,660,000 82,259,000 260,726,000 -36,822,000 5,879,000 1,845,000 218,487,000 155,483,000 22,987,000 1,605,000 154,996,000 -33,427,000 9,376,000 15,245,000 181,882,000 41,609,000 48,021,000 7,054,000 76,134,000                                 
          reconciliation of cash, cash equivalents, and restricted cash to the condensed consolidated balance sheets:
                                                                         
          cash and cash equivalents
        1,062,930,000                                                                 
          restricted cash included in other long-term assets
        217,000                                                                 
          total cash, cash equivalents, and restricted cash
        1,063,147,000                                                                 
          supplemental disclosures for cash flow information:
                                                                         
          cash paid (refunded) for income taxes
        31,438,000    -218,000    725,000                                                         
          non-cash investing and financing activities:
                                                                         
          liability accrued for property and equipment purchases
        11,038,000 2,820,000 5,593,000 -8,503,000 14,611,000 12,715,000 2,089,000 1,493,000 5,995,000 -1,109,000 307,000 104,000 2,482,000 1,033,000 1,742,000 -3,154,000 6,122,000 10,733,000 -3,575,000 -2,244,000 12,963,000 -1,516,000 2,097,000 -3,651,000 10,909,000 2,834,000 1,941,000 2,070,000 958,000 174,000 -1,376,000 448,000 2,491,000 2,777,000 -690,000 -234,000 1,208,000 590,000 -275,000 -368,000 840,000 1,181,000 322,000 -841,000 1,522,000 172,000 166,000 445,000   4,230,000               
          liability accrued for dividends and dividend equivalents
        99,312,000 2,181,000 1,214,000 1,254,000 75,939,000 -513,000 973,000 1,057,000 61,892,000 704,000 1,472,000 1,818,000 49,219,000 1,267,000 1,412,000 1,649,000 36,611,000 1,148,000 1,347,000 1,564,000 29,000,000 1,078,000 1,385,000 1,319,000 23,725,000 1,089,000 1,117,000 1,215,000 18,534,000 922,000 867,000 927,000 13,603,000 555,000 595,000 634,000 8,902,000 534,000 570,000 612,000 8,700,000 461,000 527,000 662,000 8,459,000                     
          amortization of discount on available-for-sale securities
         -209,000 -1,009,000 -2,117,000 -768,000                                                             
          gain on deferred compensation plan investments
         -2,010,000 -3,793,000    -3,895,000 -1,266,000 -4,019,000                  -75,000    -716,000    -636,000                               
          purchases of intangible assets
         -400,000 -528,000                                                              
          cash paid for acquisition, net of cash acquired
             1,000 -33,284,000                                                         
          repurchases of common stock
         -1,983,000 -2,016,000   -622,084,000 -5,534,000 -4,550,000 -4,076,000                                                         
          net increase in cash, cash equivalents and restricted cash
         18,128,000 293,869,000   -8,540,000 149,881,000 62,202,000 -72,783,000 139,881,000 -85,784,000 17,989,000 200,366,000 -27,596,000 -26,660,000 82,259,000 71,337,000 -36,822,000    155,483,000 22,987,000 1,605,000 -18,080,000 -33,427,000 9,376,000 15,245,000 9,064,000 41,609,000 48,021,000                                   
          reconciliation of cash, cash equivalents, and restricted cash to the consolidated balance sheets:
                                                                         
          restricted cash included in other current assets
                                                                         
          cash paid for income taxes
         73,093,000 4,961,000   20,948,000 24,550,000   11,450,000 15,462,000                                                       
          proceeds from common stock issued under the employee stock purchase plan
          3,885,000 5,335,000 4,121,000 4,606,000 3,831,000 3,737,000 3,091,000 2,786,000 2,377,000 2,293,000 1,927,000 1,892,000                                         
          amortization of premium (discount) on available-for-sale securities
               -5,917,000 -4,123,000 -3,686,000                                                        
          gain on sale of equity investment
                                                                         
          cash paid for an assumed lease
                                                                       
          proceeds from common stock issued under the employee equity incentive plan
                 4,000 4,000 1,110,000 1,013,000 1,014,000 1,013,000 2,318,000 2,175,000 2,227,000 2,176,000 10,744,000 2,310,000 2,347,000 2,352,000 11,758,000                                         
          gain on sale of equity investments
                                                                         
          repurchase of common stock
                                                               -24,762,000 -13,710,000 -14,529,000      
          gain on sales of equity investment
                                                                        
          amortization of premium on available-for-sale securities
                   -204,000 260,000 693,000 1,102,000 1,232,000 1,348,000 1,443,000 1,305,000 1,113,000 813,000 995,000 863,000 627,000 494,000 345,000 168,000 95,000 121,000 231,000                                    
          net cash from investing activities
                                                                         
          cash paid (refund) for income taxes
                    -1,300,000                                                     
          purchases of short-term investments
                     -47,457,000 -16,243,000 -40,715,000 -98,828,000 -53,826,000 -201,517,000 -64,150,000 -81,160,000 -88,071,000 -101,566,000 -106,153,000 -84,863,000   -13,178,000 -19,019,000 -19,437,000 -47,565,000 -38,257,000 -8,876,000 -21,409,000 -71,989,000 -89,857,000 -41,051,000 -39,201,000 -66,803,000 -50,367,000 -42,988,000 -70,046,000 -59,617,000 -14,148,000 -44,581,000 -41,977,000 -21,989,000 -22,795,000 -17,590,000  -28,935,000 -37,359,000 -49,415,000 -30,989,000          
          maturities and sales of short-term investments
                     23,194,000 38,873,000 33,551,000 32,242,000                                                 
          purchases of long-term investments
                     -1,000 1,000                                                   
          sales of long-term investments
                     425,000 125,000 175,000 25,000                                                 
          cash paid for taxes
                     23,601,000 20,293,000 40,893,000 244,000 4,931,000 7,194,000 8,646,000 377,000 369,000 403,000 354,000 279,000 1,228,000 2,304,000                 1,513,000 242,000 348,000 416,000 217,000 266,000 257,000 324,000  309,000 298,000 125,000 94,000   100,000 -86,000   159,000  192,000 
          gain on deferred compensation plan investments
                                                                         
          proceeds from maturities and sales of short-term investments
                          31,403,000 24,317,000 38,472,000 174,737,000 63,654,000 71,304,000 47,397,000 36,987,000 40,815,000 29,923,000 28,076,000 25,452,000 32,620,000 19,996,000 31,063,000 15,824,000 19,869,000 16,409,000 25,400,000                             
          proceeds from sales of long-term investments
                          100,000 275,000 25,000 50,000 125,000 25,000 100,000 125,000 50,000                                       
          proceeds from sales of property and equipment
                             28,000 1,000 7,812,000 1,456,000        3,000                             
          acquisition of in-place leases
                                 -981,000                                     
          loss on disposal and sale of property and equipment
                              12,000 4,000 -1,000                                         
          accrued liabilities
                                   -2,932,000 3,355,000 2,457,000 4,096,000 -4,459,000 4,998,000 3,576,000 4,099,000 775,000 2,402,000 3,727,000 3,539,000 425,000 344,000 5,788,000 1,347,000 -532,000 3,339,000 2,070,000 3,518,000 -8,473,000 1,717,000 -114,000 1,889,000               
          gain on disposal and sale of property and equipment
                                                                         
          proceeds from common stock issued under employee equity incentive plans
                                                                         
          proceeds from common stock issued under employee stock purchase plan
                                                                         
          loss on sales of property and equipment
                                   1,000 14,000           58,000                         
          proceeds from exercise of stock options
                                     43,000 16,000 21,000 68,000 61,000 153,000 151,000 576,000 464,000 868,000 196,000 5,388,000 1,292,000                     
          proceeds from vesting of restricted stock units
                                   2,088,000 10,383,000 953,000 916,000                                   
          proceeds from shares issued under the employee stock purchase plan
                                   1,627,000 1,466,000 -1,000 1,563,000 1,319,000 1,382,000 1,178,000 1,285,000 1,106,000 1,121,000                     
          cash paid for taxes and interest
                                    393,000 746,000 2,504,000 510,000 3,374,000 1,764,000 272,000 363,000 1,220,000 391,000 131,000 363,000 349,000 252,000                        
          depreciation and amortization of intangible assets
                                     3,253,000 3,228,000 3,075,000 2,755,000 4,009,000 4,029,000 4,019,000 4,044,000 4,132,000 3,669,000 3,553,000 3,320,000                         
          loss on sales or write-off of property and equipment
                                            -3,000                             
          excess tax benefits from equity awards
                                             -387,000 -717,000                           
          property and equipment purchases
                                     -4,469,000 -5,059,000 -5,598,000 -7,400,000 -40,665,000 -4,580,000 -17,104,000 -3,424,000 -8,076,000 -10,358,000 -13,332,000 -5,346,000 -7,614,000 -1,755,000 -1,952,000 -4,703,000 -1,772,000 -1,442,000 -4,516,000 -4,623,000 -7,366,000 -3,435,000  -5,551,000 -8,309,000 -4,875,000 -2,227,000 -13,524,000 -2,215,000 -3,056,000 -4,207,000 -5,819,000 -9,183,000 -3,570,000 -2,626,000 -4,236,000 
          supplemental disclosures:
                                                                         
          amortization of premium on available-for-sale investments
                                       373,000 435,000 482,000 489,000 498,000 507,000                             
          gain on sales of property and equipment
                                                                         
          proceeds from release of restricted stock units
                                        7,793,000                                 
          change in fair value of contingent consideration
                                                                         
          repurchase of common shares
                                                                         
          net increase in cash and cash equivalents
                                         -21,665,000    3,224,000    14,244,000 -4,252,000   -6,051,000 18,978,000 -12,328,000 8,711,000 8,448,000 18,183,000 -3,143,000 -3,397,000 2,913,000 -17,640,000 3,399,000 -4,713,000 23,623,000 26,052,000   97,000 2,148,000   
          cash and cash equivalents, beginning of period
                                         112,703,000 90,860,000 126,266,000 101,213,000 75,104,000  96,371,000 48,010,000 46,717,000 
          cash and cash equivalents, end of period
                                         -21,665,000 33,314,000 -5,716,000 76,826,000 3,224,000 27,433,000 4,238,000 77,808,000 14,244,000 -4,252,000 -15,098,000 95,966,000 -6,051,000 18,978,000 88,885,000 8,711,000 8,448,000 93,287,000  -3,397,000 2,913,000 78,731,000 3,399,000 -4,713,000 23,623,000 74,062,000 3,735,000 -4,687,000 97,000 48,865,000 -5,276,000 -4,823,000 
          supplemental disclosures of non-cash investing and financing activities:
                                                                         
          net decrease in cash and cash equivalents
                                           -5,716,000 -35,877,000   4,238,000 -13,052,000    -30,300,000                    -4,823,000 
          gain on employee deferred compensation plan investments
                                            -733,000                             
          contributions to employee deferred compensation plan
                                            -1,233,000 -2,732,000 -691,000 -593,000 -1,030,000                         
          loss on employee deferred compensation plan investments
                                                                         
          changes in operating assets and liabilities, net of effects of an acquisition:
                                                                         
          proceeds from sales of long-term investment
                                                                         
          cash paid for an acquisition, net of cash acquired
                                                                         
          repurchases of common shares
                                                 -551,000 -13,606,000 -7,724,000 -10,405,000 -9,180,000 -12,438,000 -11,358,000                  
          fair value of contingent consideration related to an acquisition
                                                                         
          losses on sales of property and equipment
                                                                         
          losses on investments
                                              -234,000                           
          proceeds from sales of short-term investments
                                              52,814,000 50,566,000 37,353,000                         
          gains on investments
                                                -131,000                         
          prepaid expenses and other assets
                                                -181,000 -531,000 -264,000 43,000 362,000             1,006,000 -345,000 551,000 -71,000 -340,000 238,000   
          premium amortization and loss on investments
                                                                         
          excess tax benefit from equity awards
                                                 -1,707,000 -1,573,000                       
          premium amortization and losses on investments
                                                  654,000 361,000 -105,000                     
          stock-based compensation
                                                  10,475,000 9,497,000 9,219,000 8,859,000 8,415,000 7,598,000 5,231,000 5,190,000 4,660,000  4,182,000 3,829,000 3,315,000 3,090,000 3,374,000 3,675,000 2,987,000 3,085,000 4,162,000 5,539,000 4,024,000 4,180,000 3,166,000 
          proceeds from sale of short-term investments
                                                  39,063,000 57,573,000 34,389,000 20,250,000 51,250,000 27,252,000 17,900,000 16,550,000 21,250,000  24,650,000 36,518,000 25,000,000 21,001,000 21,999,000 43,189,000 43,530,000 44,240,000 58,005,000 56,850,000 38,148,000 34,700,000 21,000,000 
          premiums paid on deferred compensation plan
                                                  -680,000 -599,000 -2,176,000                     
          tax liabilities
                                                    187,000                     
          amortization and realized gain/loss on investments
                                                                         
          accrued income taxes payable and noncurrent tax liabilities
                                                     -935,000 96,000 38,000 5,799,000 -2,574,000 -3,440,000  -518,000 -402,000 -432,000 -321,000 -194,000 -575,000 -1,037,000 -286,000 -266,000 -1,090,000 -353,000 -227,000 -705,000 
          proceeds from sale of long-term investments
                                                        25,000  2,000,000 100,000 2,025,000 1,650,000 50,000 2,050,000 175,000 125,000 50,000 75,000 -1,200,000 1,250,000 
          investments related to deferred compensation plan
                                                     -2,464,000                    
          proceeds from issuance of common shares
                                                     1,780,000 3,069,000 5,554,000                  
          proceeds from employee stock purchase plan
                                                     1,025,000 1,053,000 978,000 1,167,000  816,000 1,036,000 845,000 928,000 831,000 1,054,000 864,000 
          amortization and realized gain on investments
                                                                         
          prepaid expenses and other current assets
                                                      589,000 -2,036,000 11,000 137,000 315,000  -193,000 -394,000 97,000 310,000         545,000 
          dividends and dividend equivalents payable
                                                                         
          amortization and realized loss on investments
                                                       71,000                  
          excess tax benefit from stock option transactions
                                                          -132,000  -68,000 -667,000 -100,000 118,000 329,000 -39,000 -435,000 143,000 -3,000 -1,181,000 -215,000 -109,000 88,000 
          excess tax benefits from stock option transactions
                                                          132,000  68,000 667,000 100,000 -118,000 -329,000 39,000 435,000 -143,000 3,000 1,181,000 215,000 109,000 -88,000 
          supplemental disclosures of non-cash activities:
                                                                         
          loss on disposal of property and equipment
                                                            5,000 74,000     -51,000     
          amortization and loss on investments
                                                                         
          gain on auction-rate securities
                                                                         
          proceeds from sale of property and equipment
                                                                        
          proceeds from issuance of common stock
                                                        16,470,000 6,345,000 9,839,000  4,892,000 3,356,000 3,985,000 363,000 72,000 735,000 3,527,000 1,074,000 1,488,000 7,730,000 4,047,000 2,767,000 4,686,000 
          temporary impairment of auction-rate securities
                                                        -149,000 17,000 15,000         60,000 -45,000 10,000 -185,000   
          amortization and realized gain on available-for-sale securities
                                                         106,000 98,000               
          deferred income tax assets
                                                             -2,000           
          tax benefit from stock option transactions
                                                         1,963,000 2,914,000  677,000 1,280,000 649,000 51,000 62,000 373,000 1,472,000 244,000 267,000 2,271,000 567,000 451,000 627,000 
          unpaid property and equipment purchases
                                                                         
          cash from operating activities
                                                                         
          cash from investing activities
                                                                         
          cash from financing activities
                                                                         
          effect of exchange rate changes on cash and cash equivalents
                                                                         
          amortization and realized gain on debt instruments
                                                            58,000 59,000 28,000  49,000   222,000 191,000 148,000 127,000   
          credit gain on auction-rate securities
                                                                        
          accrued and other long-term liabilities
                                                            654,000 -3,206,000 2,207,000 -58,000          
          purchase of intangible assets
                                                                         
          liability accrued for equipment purchases
                                                            -2,727,000 1,315,000 3,099,000 1,021,000 -65,000 -2,937,000 3,464,000 2,578,000 1,014,000 -1,854,000 2,526,000 270,000 -1,835,000 
          reversal of temporary impairment of auction-rate securities
                                                                         
          temporary impairment reversal of auction-rate securities
                                                             -9,000 -90,000 20,000          
          amortization and realized gain on available for sale securities
                                                                         
          credit loss on auction-rate securities
                                                                       
          changes in restricted assets
                                                                     7,000 7,350,000 
          other-than-temporary impairment of short-term investments
                                                                         
          value of auction-rate security put right
                                                                         
          deferred rent
                                                                -2,000    31,000    -72,000 
          accrued and long-term liabilities
                                                                 1,642,000 -347,000 -961,000 -493,000 2,367,000 -357,000 -516,000 -6,154,000 
          purchase of short-term investments
                                                                 -6,989,000 -15,968,000 -33,489,000 -58,102,000 -70,993,000 -46,037,000 -54,891,000 -39,957,000 
          cash paid (received) for taxes
                                                                         
          temporary impairment (reversal) of auction-rate securities
                                                                 -140,000       
          amortization and realized loss on debt instruments
                                                                  183,000       
          unrealized loss on auction-rate securities
                                                                         
          cash paid (refund) for taxes
                                                                         
          purchase of long-term investments
                                                                         
          other-than-temporary impairment of long-term investments
                                                                         
          accretion of purchase discounts on debt instruments
                                                                        143,000 
          effect of change in exchange rates on cash
                                                                        113,000 
          supplemental disclosures of cash flow information:
                                                                         
          impairment (market value adjustment) of auction-rate securities
                                                                        -30,000