ACCOUNTS RECEIVABLE (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Doubtful Accounts (1)	$ (5,000)	$ (27,000)
Accounts Receivable, Net	124,934	136,682
Customer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Gross	74,000	79,000
Customer | Unbilled
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Gross	34,000	39,000
Customer | Due from Affiliates (Note 5)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Gross	9,000	7,000
Other (1)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Gross	$ 13,000	$ 39,000