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EARNINGS PER SHARE (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
SHARE-BASED COMPENSATION    
Net income $ 8,326 $ 16,037
Weighted average shares outstanding - basic 28,126,400 28,758,310
Weighted average shares outstanding - diluted 28,277,753 28,979,855
Basic earnings per common share (in dollars per share) $ 0.30 $ 0.56
Diluted earnings per common share (in dollars per share) $ 0.29 $ 0.55
Antidilutive securities excluded from the dilutive share calculation (in shares) 0 0
Stock Option    
SHARE-BASED COMPENSATION    
Dilutive effect of share-based compensation arrangements 151,353 221,545