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Net Income Per Common Share - Computation of Basic and Diluted Net Income Per Common Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Earnings Per Share [Abstract]      
Net income $ 376,354 $ 483,656 $ 857,658
Computation of basic and diluted net income per common share      
Weighted average common shares outstanding during the period (for basic calculation) (in shares) 39,086 39,649 39,526
Dilutive effect of other potential common shares (in shares) 232 252 246
Weighted average common shares and potential common shares (for diluted calculation) (in shares) 39,318 39,901 39,772
Net income per common share - Basic (in dollars per share) $ 9.63 $ 12.20 $ 21.70
Net income per common share - Diluted (in dollars per share) $ 9.57 $ 12.12 $ 21.56