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EMPLOYEE STOCK COMPENSATION - Nonvested Restricted Stock Awards and Restricted Stock Units (Detail) - Restricted stock awards and restricted stock units - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2017
Number of Shares    
Outstanding at beginning of period (in shares) 1,056,421 1,417,144
Granted (in shares) 633,226 633,226
Vested (in shares) (414,106) (716,948)
Forfeited (in shares) (225,227) (283,108)
Outstanding at end of period (in shares) 1,050,314 1,050,314
Weighted Average Grant Date Fair Value Per Share    
Outstanding at beginning of period (in dollars per share) $ 15.43 $ 16.16
Granted (in dollars per share) 20.74 20.74
Vested (in dollars per share) 16.25 17.39
Forfeited (in dollars per share) 17.85 17.24
Outstanding at end of period (in dollars per share) $ 17.85 $ 17.85