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Earnings Per Share - Computation of Basic Earnings and Diluted Earnings Per Share Data (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Numerator for basic and diluted earnings per share:        
Net income, basic $ 39,946 $ 25,530 $ 79,930 $ 62,506
Net income, diluted $ 39,946 $ 25,530 $ 79,930 $ 62,506
Denominator:        
Weighted-average basic common shares outstanding (in shares) 41,500 40,765 41,499 40,761
Assumed conversion of dilutive securities:        
Stock awards (in shares) 821 1,329 950 1,387
Convertible Senior Notes (in shares) 0 0 0 0
Denominator for diluted earnings per share- Adjusted weighted-average shares (in shares) 42,321 42,094 42,449 42,148
Earnings per common share:        
Basic (in usd per share) $ 0.96 $ 0.63 $ 1.93 $ 1.53
Diluted (in usd per share) $ 0.94 $ 0.61 $ 1.88 $ 1.48