INCOME TAXES - Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ (164,435)	$ (111,086)
Accrued interest related to uncertain tax positions	100	100
Unrecognized Tax Benefits	1,067	$ 1,096	$ 1,172	$ 2,754
Gross unrecognized tax benefits that would favorably affect effective income tax rate	100
Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	243,000
NOLs to be recorded in additional paid-in capital when realized	(18,000)
Net operating loss carryforwards subject to annual limitation	18,400
State
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 322,700