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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Cumulative Effect, Period of Adoption, Adjustment
Common Stock
Additional Paid-In Capital
Additional Paid-In Capital
Cumulative Effect, Period of Adoption, Adjustment
Retained Earnings
Retained Earnings
Cumulative Effect, Period of Adoption, Adjustment
Accumulated Other Comprehensive (Loss)
Balance, beginning of period (in shares) at Dec. 31, 2019     79,599          
Balance, beginning 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)     (87)          
Repurchase of common stock (6,000)   $ (1) (5,999)        
Issuance of common stock for share-based compensation plans (in shares)     564          
Issuance of common stock for stock compensation plans (23,011)   $ 6 (23,017)        
Stock-based compensation 23,199     23,199        
Cash dividends declared ($0.03 per share) (2,405)         (2,405)    
Other comprehensive income (loss) (414)             (414)
Net (loss) (25,372)         (25,372)    
Balance, end of period (in shares) at Mar. 31, 2020     80,076          
Balance, end of period at Mar. 31, 2020 $ 566,611   $ 801 196,310   383,142   (13,642)
Balance, beginning of period (in shares) at Dec. 31, 2020 80,890   80,890          
Balance, beginning of period at Dec. 31, 2020 $ 542,172 $ (52,205) $ 809 204,432 $ (61,604) 339,879 $ 9,399 (2,948)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Accounting standards update Accounting Standards Update 2020-06              
Repurchase of common stock (in shares)     (70)          
Repurchase of common stock $ (9,146)   $ (1) (9,145)        
Issuance of common stock for share-based compensation plans (in shares)     402          
Issuance of common stock for stock compensation plans (25,509)   $ 4 (25,513)        
Issuance of common stock under the employee stock purchase plan (in shares)     24          
Issuance of common stock under the employee stock purchase plan 2,288     2,288        
Stock-based compensation 30,100     30,100        
Cash dividends declared ($0.03 per share) (2,438)         (2,438)    
Other comprehensive income (loss) 280             280
Net (loss) $ (6,617)         (6,617)    
Balance, end of period (in shares) at Mar. 31, 2021 81,246   81,246          
Balance, end of period at Mar. 31, 2021 $ 478,925   $ 812 $ 140,558   $ 340,223   $ (2,668)