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SHARE-BASED COMPENSATION (Details) - Restricted Stock Awards and Units
3 Months Ended
Mar. 31, 2017
$ / shares
shares
Activity of nonvested shares  
Nonvested restricted stock awards and units, beginning of period (in shares) | shares 437,697
Changes during the period:  
Granted (in shares) | shares 32,689
Vested (in shares) | shares (27,499)
Forfeited (in shares) | shares (1,602)
Nonvested restricted stock awards and units, end of period (in shares) | shares 441,285
Weighted Average Grant Date Fair Value  
Nonvested restricted stock awards and units, beginning of period (in dollars per share) | $ / shares $ 22.01
Changes during the period:  
Granted (in dollars per share) | $ / shares 32.09
Vested (in dollars per share) | $ / shares 20.75
Forfeited (in dollars per share) | $ / shares 23.26
Nonvested restricted stock awards and units, end of period (in dollars per share) | $ / shares $ 22.83