INCOME TAXES - Income Tax Payments Refunds Net Operating Loss Carryforwards (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Payments And Refunds
Income Taxes Paid Local And State Tax Authorities	$ 81	$ 79	$ 69
Federal and state income tax refunds	0	$ 10	$ 5
Operating Loss Carryforwards [Line Items]
State income tax credits	1,248
Domestic Country [Member]
Operating Loss Carryforwards [Line Items]
NOL carryforwards	292,800
Operating Loss Carryforwards Suspended Windfall	10,799
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
NOL carryforwards	614,834
Operating Loss Carryforwards Suspended Windfall	$ 8,806