INCOME TAXES - Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ (178,452)	$ (164,435)
Unrecognized Tax Benefits	1,021	1,067	$ 1,096	$ 1,172
Gross unrecognized tax benefits that would favorably affect effective income tax rate	100
Accrued interest related to uncertain tax positions		$ 100
Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	320,600
Net operating loss carryforwards subject to annual limitation	15,600
NOLs to be recorded in additional paid-in capital when realized	(18,200)
State
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 366,200