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NET INCOME PER SHARE - Basic and Diluted Net Income Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Mar. 31, 2022
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2022
Jun. 30, 2021
Basic net income per share:            
Net income $ 44,788 $ 32,901 $ 35,068 $ 45,394 $ 77,689 $ 80,462
Weighted average common shares outstanding - Basic (in shares) 83,168   84,687   83,400 84,593
Basic net income per common share (in dollars per share) $ 0.54   $ 0.41   $ 0.93 $ 0.95
Diluted net income per share:            
Net income $ 44,788 $ 32,901 $ 35,068 $ 45,394 $ 77,689 $ 80,462
Weighted average common shares outstanding - Basic (in shares) 83,168   84,687   83,400 84,593
Effect of dilutive securities:            
Stock options and restricted stock (in shares) 454   653   579 731
Weighted average common shares for diluted earnings per share (in shares) 83,622   85,340   83,979 85,324
Diluted net income per common share (in dollars per share) $ 0.54   $ 0.41   $ 0.93 $ 0.94