INCOME TAXES (Textuals) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Operating Loss Carryforwards [Line Items]
Operating loss carryforward, amount expected to be utilized on an annual basis	$ 6,900
Domestic Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	236,300	$ 262,500
Operating loss carryforward, amount expected to be utilized on an annual basis	21,500
Tax basis bad debt reserves for which no income tax liability has been booked	5,400
Unrecognized deferred tax liability related to bad debt reserves	1,900
Domestic Tax Authority [Member] | General Business Tax Credit Carryforward [Member]
Operating Loss Carryforwards [Line Items]
Federal and state tax credit carryforwards	3,300	3,300
Domestic Tax Authority [Member] | Alternative Minimum Tax Credit Carryforward [Member]
Operating Loss Carryforwards [Line Items]
Federal and state tax credit carryforwards	4,200	4,200
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	145,800	$ 167,600
Operating loss carryforwards, valuation allowance	2,200
Operating loss carryforward, amount expected to be utilized on an annual basis, valuation allowance	2,200
State and Local Jurisdiction [Member] | Alternative Minimum Tax Credit Carryforward [Member]
Operating Loss Carryforwards [Line Items]
Federal and state tax credit carryforwards	$ 193