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EARNINGS PER SHARE - Schedule of Earnings per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Earnings per share        
Net income $ 18,717 $ 63,749 $ 62,028 $ 98,416
Average number of common shares issued (in shares) 51,903 51,903 51,903 51,903
Less: average number of treasury shares (in shares) 6,433 2,764 5,068 1,519
Less: average number of unvested stock award shares (in shares) 770 744 779 712
Average number of basic shares outstanding (in shares) 44,700 48,395 46,056 49,672
Average number of diluted shares outstanding (in shares) 45,034 48,744 46,396 49,963
Basic earnings per common share (in dollars per share) $ 0.42 $ 1.32 $ 1.35 $ 1.98
Diluted earnings per common share (in dollars per share) $ 0.42 $ 1.31 $ 1.34 $ 1.97
Unvested stock award shares        
Earnings per share        
Plus: dilutive effect of share-based payment arrangements (in shares) 330 342 336 286
Stock Options Outstanding        
Earnings per share        
Plus: dilutive effect of share-based payment arrangements (in shares) 4 7 4 5