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LONG-TERM DEBT AND CREDIT AGREEMENT Unamortized Debt Issuance Costs and Discounts (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Long-term Debt [Member] | Cerberus Business Finance LLC [Member]    
Debt Instrument [Line Items]    
Term loan unamortized debt issuance costs $ 3,499 $ 4,042
Convertible Debt [Member]    
Debt Instrument [Line Items]    
Convertible Note unamortized issue discount and debt issuance costs $ 17,026 $ 23,413