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SHARE-BASED COMPENSATION (Details) - Restricted Stock Awards and Units
9 Months Ended
Sep. 30, 2018
$ / shares
shares
Activity of nonvested shares  
Nonvested restricted stock awards and units, beginning of period (in shares) | shares 397,551
Changes during the period:  
Granted (in shares) | shares 116,152
Vested (in shares) | shares (123,629)
Forfeited (in shares) | shares (20,294)
Nonvested restricted stock awards and units, end of period (in shares) | shares 369,780
Weighted Average Grant Date Fair Value  
Nonvested restricted stock awards and units, beginning of period (in dollars per share) | $ / shares $ 25.49
Changes during the period:  
Granted (in dollars per share) | $ / shares 29.51
Vested (in dollars per share) | $ / shares 24.40
Forfeited (in dollars per share) | $ / shares 27.47
Nonvested restricted stock awards and units, end of period (in dollars per share) | $ / shares $ 27.01