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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-In Capital
Accumulated Other Comprehensive Income (Loss), Net
Retained Earnings
Beginning Balance at Dec. 31, 2019 $ 1,346,169 $ 8 $ 906,937 $ (688) $ 439,912
Beginning Balance (in shares) at Dec. 31, 2019   78,433      
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income 1,616,900       1,616,900
Change in unrealized gains (losses) on investments, net of tax (194)     (194)  
Change in foreign currency translation adjustment, net of tax 25,793     25,793  
Issuance of common stock relating to employee equity compensation plans 20,314   20,314    
Issuance of common stock relating to employee equity compensation plans (in shares)   416      
Tax withholdings related to net share settlements of equity awards (48,674)   (48,674)    
Stock-based compensation 73,163   73,163    
Ending Balance at Sep. 30, 2020 3,033,471 $ 8 951,740 24,911 2,056,812
Ending Balance (in shares) at Sep. 30, 2020   78,849      
Beginning Balance at Jun. 30, 2020 2,845,045 $ 8 918,495 9,101 1,917,441
Beginning Balance (in shares) at Jun. 30, 2020   78,781      
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income 139,371       139,371
Change in foreign currency translation adjustment, net of tax 15,810     15,810  
Issuance of common stock relating to employee equity compensation plans 9,652   9,652    
Issuance of common stock relating to employee equity compensation plans (in shares)   68      
Tax withholdings related to net share settlements of equity awards (1,636)   (1,636)    
Stock-based compensation 25,229   25,229    
Ending Balance at Sep. 30, 2020 3,033,471 $ 8 951,740 24,911 2,056,812
Ending Balance (in shares) at Sep. 30, 2020   78,849      
Beginning Balance at Dec. 31, 2020 3,233,865 $ 8 974,556 43,501 2,215,800
Beginning Balance (in shares) at Dec. 31, 2020   78,860      
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income 581,059       581,059
Change in foreign currency translation adjustment, net of tax (25,902)     (25,902)  
Issuance of common stock relating to employee equity compensation plans 25,623   25,623    
Issuance of common stock relating to employee equity compensation plans (in shares)   434      
Tax withholdings related to net share settlements of equity awards (107,343)   (107,343)    
Common stock repurchased and retired (275,038)   (4,884)   (270,154)
Common stock repurchased and retired (in shares)   (442)      
Stock-based compensation 84,498   84,498    
Ending Balance at Sep. 30, 2021 3,516,762 $ 8 972,450 17,599 2,526,705
Ending Balance (in shares) at Sep. 30, 2021   78,852      
Beginning Balance at Jun. 30, 2021 3,384,410 $ 8 895,831 29,616 2,458,955
Beginning Balance (in shares) at Jun. 30, 2021   78,948      
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income 180,969       180,969
Change in unrealized gains (losses) on investments, net of tax 20     20  
Change in foreign currency translation adjustment, net of tax (12,037)     (12,037)  
Issuance of common stock relating to employee equity compensation plans 12,490   12,490    
Issuance of common stock relating to employee equity compensation plans (in shares)   69      
Tax withholdings related to net share settlements of equity awards (2,454)   (2,454)    
Common stock repurchased and retired (115,038)   (1,819)   (113,219)
Common stock repurchased and retired (in shares)   (165)      
Equity forward contract related to accelerated stock repurchase 40,000   40,000    
Stock-based compensation 28,402   28,402    
Ending Balance at Sep. 30, 2021 $ 3,516,762 $ 8 $ 972,450 $ 17,599 $ 2,526,705
Ending Balance (in shares) at Sep. 30, 2021   78,852