STOCKHOLDERS' EQUITY - Summary of Restricted Stock and Performance Shares (Details)	6 Months Ended
	Jun. 30, 2016 $ / shares shares
Restricted Stock [Member]
Number of Shares
Unvested restricted stock awards, Beginning balance (in shares) | shares	586,488
Granted (in shares) | shares	246,020
Vested (in shares) | shares	(259,951)
Forfeited (in shares) | shares	(12,667)
Unvested restricted stock awards, Ending balance (in shares) | shares	559,890
Weighted Average Grant Date Fair Value (in usd per share)
Unvested restricted stock awards, Beginning balance (in dollars per share) | $ / shares	$ 7.82
Granted (in dollars per share) | $ / shares	12.01
Vested (in dollars per share) | $ / shares	7.06
Forfeited (in dollars per share) | $ / shares	10.85
Unvested restricted stock awards, Ending balance (in dollars per share) | $ / shares	$ 9.95
Performance Stock [Member]
Number of Shares
Unvested restricted stock awards, Beginning balance (in shares) | shares	234,138
Granted (in shares) | shares	202,442
Vested (in shares) | shares	0
Forfeited (in shares) | shares	(9,334)
Unvested restricted stock awards, Ending balance (in shares) | shares	427,246
Weighted Average Grant Date Fair Value (in usd per share)
Unvested restricted stock awards, Beginning balance (in dollars per share) | $ / shares	$ 9.81
Granted (in dollars per share) | $ / shares	11.63
Vested (in dollars per share) | $ / shares	0.00
Forfeited (in dollars per share) | $ / shares	11.79
Unvested restricted stock awards, Ending balance (in dollars per share) | $ / shares	$ 10.63