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STOCK-BASED COMPENSATION Outstanding Unvested Restricted Stock Awards (Detail) - Restricted Stock
9 Months Ended
Sep. 30, 2016
shares
Unvested Shares  
Outstanding at beginning of period (in shares) 959,733
Granted (in shares) 183,791
Vested (in shares) (258,582)
Cancelled (in shares) (159,193)
Outstanding at end of period (in shares) 725,749