STOCKHOLDERS' EQUITY - Summary of Restricted Stock and Performance Shares (Details)	6 Months Ended
	Jun. 30, 2017 $ / shares shares
Restricted Stock [Member]
Number of Shares
Unvested restricted stock awards, Beginning balance (in shares) | shares	532,294
Granted (in shares) | shares	300,047
Vested (in shares) | shares	(287,259)
Forfeited (in shares) | shares	(34,287)
Unvested restricted stock awards, Ending balance (in shares) | shares	510,795
Weighted Average Grant Date Fair Value (in usd per share)
Unvested restricted stock awards, Beginning balance (in dollars per share) | $ / shares	$ 9.98
Granted (in dollars per share) | $ / shares	13.77
Vested (in dollars per share) | $ / shares	8.65
Forfeited (in dollars per share) | $ / shares	9.56
Unvested restricted stock awards, Ending balance (in dollars per share) | $ / shares	$ 12.98
Performance Stock [Member]
Number of Shares
Unvested restricted stock awards, Beginning balance (in shares) | shares	332,092
Granted (in shares) | shares	181,067
Vested (in shares) | shares	0
Forfeited (in shares) | shares	(118,371)
Unvested restricted stock awards, Ending balance (in shares) | shares	394,788
Weighted Average Grant Date Fair Value (in usd per share)
Unvested restricted stock awards, Beginning balance (in dollars per share) | $ / shares	$ 11.73
Granted (in dollars per share) | $ / shares	14.36
Vested (in dollars per share) | $ / shares	0.00
Forfeited (in dollars per share) | $ / shares	11.78
Unvested restricted stock awards, Ending balance (in dollars per share) | $ / shares	$ 12.92