LONG-TERM DEBT LIABILITIES - Senior Debt (Details) (USD $)	3 Months Ended
	Mar. 31, 2014 number	Mar. 31, 2013
Debt Instrument [Line Items]
Credit Facility	$ 425,000,000
Consolidated Leverage Ratio	4.6
Consolidated Interest Coverage Ratio	2.8
Amortization of deferred financing costs	1,160,000	1,109,000
Gains (Losses) on Extinguishment of Debt	0	0
Minimum
Debt Instrument [Line Items]
Consolidated Interest Coverage Ratio	1.6
Maximum
Debt Instrument [Line Items]
Consolidated Leverage Ratio	6.25
Mandatory Prepayment Percentage	50.00%
Revolving Credit Facility
Debt Instrument [Line Items]
Credit Facility	50,000,000
Undrawn amount of the Revolver	49,400,000
Line of Credit Facility, Amount Outstanding	0
Term Loan B
Debt Instrument [Line Items]
Credit Facility	375,000,000
Line of Credit Facility, Amount Outstanding	$ 275,000,000