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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
$ in Thousands
Total
Cumulative effect of a change in accounting principle related to convertible debt
Common Stock
Treasury Stock
Additional Paid-In Capital
Additional Paid-In Capital
Cumulative effect of a change in accounting principle related to convertible debt
Accumulated Earnings
Accumulated Earnings
Cumulative effect of a change in accounting principle related to convertible debt
Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period (in shares) at Dec. 31, 2020     52,677,000            
Balance at beginning of period at Dec. 31, 2020 $ 967,503   $ 53 $ (238,109) $ 920,359   $ 290,722   $ (5,522)
Balance at beginning of period, Treasury stock (in shares) at Dec. 31, 2020       (9,894,000)          
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income (loss) 14,127           14,127    
Other comprehensive income (loss) (621)               (621)
Share-based compensation 11,772       11,772        
Issuance of common stock under employee stock plans (in shares)     388,000            
Issuance of common stock under employee stock plans 20,826       20,826        
Tax payments related to restricted stock units (2,596)       (2,596)        
Balance at end of period (in shares) at Mar. 31, 2021     53,065,000            
Balance at end of period at Mar. 31, 2021 1,011,011   $ 53 $ (238,109) 950,361   304,849   (6,143)
Balance at end of period, Treasury stock (in shares) at Mar. 31, 2021       (9,894,000)          
Balance at beginning of period (in shares) at Dec. 31, 2020     52,677,000            
Balance at beginning of period at Dec. 31, 2020 $ 967,503   $ 53 $ (238,109) 920,359   290,722   (5,522)
Balance at beginning of period, Treasury stock (in shares) at Dec. 31, 2020       (9,894,000)          
Balance at end of period (in shares) at Dec. 31, 2021 44,179,000   54,073,000            
Balance at end of period at Dec. 31, 2021 $ 1,146,689 $ (56,233) $ 54 $ (238,109) 1,024,580 $ (72,742) 368,571 $ 16,509 (8,407)
Balance at end of period, Treasury stock (in shares) at Dec. 31, 2021 (9,894,000)     (9,894,000)          
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Accounting Standards Update [Extensible Enumeration] Accounting Standards Update 2020-06 [Member]                
Net income (loss) $ 8,213           8,213    
Other comprehensive income (loss) (2,555)               (2,555)
Share-based compensation 16,208       16,208        
Issuance of common stock under employee stock plans (in shares)     384,000            
Issuance of common stock under employee stock plans 18,951       18,951        
Tax payments related to restricted stock units (4,322)       (4,322)        
Stock repurchases (in shares)       (389,000)          
Stock repurchases $ (52,210)     $ (52,210)          
Balance at end of period (in shares) at Mar. 31, 2022 44,174,000   54,457,000            
Balance at end of period at Mar. 31, 2022 $ 1,074,741   $ 54 $ (290,319) $ 982,675   $ 393,293   $ (10,962)
Balance at end of period, Treasury stock (in shares) at Mar. 31, 2022 (10,283,000)     (10,283,000)