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DEBT - Schedule of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Feb. 11, 2014
Debt Instrument [Line Items]
Long-term debt	$ 467,716
Less: Deferred financing costs	(12,452)	$ (15,863)
Total Debt	451,934	418,121
Less: Current portion	(18,521)	(24,380)
Long-term debt, net of current portion	433,413	393,741
Term Loan Facilities
Debt Instrument [Line Items]
Long-term debt	210,207	222,757
2021 Notes, net of unamortized discount
Debt Instrument [Line Items]
Long-term debt	196,670	196,038
Less: Deferred financing costs			$ (500)
Capital leases
Debt Instrument [Line Items]
Capital leases	2,209	189
Senior Credit Facilities \| Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt	$ 55,300	$ 15,000