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SHARE-BASED COMPENSATION
9 Months Ended
Sep. 30, 2020
Share-based Payment Arrangement [Abstract]  
SHARE-BASED COMPENSATION
11. SHARE-BASED COMPENSATION
 
Restricted Stock Units
 
The table below presents the activity of restricted stock units for the nine months ended September 30, 2020:
 
SharesWeighted Average Grant Date Fair Value
Non-vested restricted stock units, beginning of period366,467 $28.89 
Changes during the period:  
Granted321,722 18.11 
Vested(123,179)29.47 
Forfeited(22,628)24.80 
Non-vested restricted stock units, end of period542,382 22.53