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SHARE-BASED COMPENSATION (Details) - Restricted Stock Awards and Units
3 Months Ended
Mar. 31, 2019
$ / shares
shares
Activity of nonvested shares  
Nonvested restricted stock awards and units, beginning of period (in shares) | shares 362,725
Changes during the period:  
Granted (in shares) | shares 111,478
Vested (in shares) | shares (50,062)
Forfeited (in shares) | shares (5,890)
Nonvested restricted stock awards and units, end of period (in shares) | shares 418,251
Weighted Average Grant Date Fair Value  
Nonvested restricted stock awards and units, beginning of period (in dollars per share) | $ / shares $ 26.98
Changes during the period:  
Granted (in dollars per share) | $ / shares 29.27
Vested (in dollars per share) | $ / shares 22.03
Forfeited (in dollars per share) | $ / shares 29.83
Nonvested restricted stock awards and units, end of period (in dollars per share) | $ / shares $ 28.15