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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-In Capital
Retained Earnings
Accumulated Other Comprehensive (Loss) Income
Balance, beginning of period (in shares) at Dec. 31, 2017   78,081      
Balance, beginning of period at Dec. 31, 2017 $ 655,870 $ 781 $ 152,097 $ 509,697 $ (6,705)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Repurchase of common stock (in shares)   (1,001)      
Repurchase of common stock (55,275) $ (10) (55,265)    
Issuance of common stock for stock compensation plans (in shares)   1,413      
Issuance of common stock for stock compensation plans (39,361) $ 14 (39,375)    
Issuance of common stock under Employee Stock Purchase Plan (in shares)   33      
Issuance of common stock under the employee stock purchase plan 1,767   1,767    
Stock-based compensation 63,981   63,981    
Cash dividends declared (9,451)     (9,451)  
Other comprehensive (loss) income (6,617)       (6,617)
Net (loss) income 10,617     10,617  
Balance, end of period (in shares) at Dec. 31, 2018   78,526      
Balance, end of period at Dec. 31, 2018 621,531 $ 785 123,205 510,863 (13,322)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Repurchase of common stock (in shares)   (333)      
Repurchase of common stock (21,136) $ (3) (21,133)    
Issuance of common stock for stock compensation plans (in shares)   1,375      
Issuance of common stock for stock compensation plans (44,839) $ 14 (44,853)    
Issuance of common stock under Employee Stock Purchase Plan (in shares)   31      
Issuance of common stock under the employee stock purchase plan 2,202   2,202    
Stock-based compensation 81,102   81,102    
Cash dividends declared (9,511)     (9,511)  
Other comprehensive (loss) income 94       94
Net (loss) income $ (90,433)     (90,433)  
Balance, end of period (in shares) at Dec. 31, 2019 79,599 79,599      
Balance, end of period at Dec. 31, 2019 $ 539,010 $ 796 140,523 410,919 (13,228)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Equity component of convertible senior notes, net 61,604   61,604    
Repurchase of common stock (in shares)   (278)      
Repurchase of common stock (28,274) $ (3) (28,271)    
Issuance of common stock for stock compensation plans (in shares)   1,536      
Issuance of common stock for stock compensation plans (75,562) $ 16 (75,578)    
Issuance of common stock under Employee Stock Purchase Plan (in shares)   33      
Issuance of common stock under the employee stock purchase plan 3,039   3,039    
Stock-based compensation 103,115   103,115    
Cash dividends declared (9,667)     (9,667)  
Other comprehensive (loss) income 10,280       10,280
Net (loss) income $ (61,373)     (61,373)  
Balance, end of period (in shares) at Dec. 31, 2020 80,890 80,890      
Balance, end of period at Dec. 31, 2020 $ 542,172 $ 809 $ 204,432 $ 339,879 $ (2,948)