DEBT - Summary of Long-term Debt (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Capital leases	$ 696	$ 576
Total Debt	423,280	435,579
Less: Current portion	4,925	60,257
Long-term debt, net of current portion	418,355	375,322
Line of Credit | Revolving Credit Facility, Third Amendment
Debt Instrument [Line Items]
Long-term Debt	4,500	40,003
Senior Debt Obligations | Senior Secured Term Loan B Facilities
Debt Instrument [Line Items]
Long-term Debt	222,757	395,000
Senior Notes | Senior Unsecured 8.875% Notes
Debt Instrument [Line Items]
Long-term Debt	$ 195,327	$ 0