LONG-TERM DEBT LIABILITIES - Senior Debt (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014 number	Sep. 30, 2013	Sep. 30, 2014 number	Sep. 30, 2013
Debt Instrument [Line Items]
Credit Facility	$ 425,000,000		$ 425,000,000
Consolidated Leverage Ratio	4.66		4.66
Consolidated Interest Coverage Ratio	2.83		2.83
Amortization of deferred financing costs			3,391,000	3,261,000
Gains (Losses) on Extinguishment of Debt	0	0	0	0
Minimum
Debt Instrument [Line Items]
Consolidated Interest Coverage Ratio	1.75		1.75
Maximum
Debt Instrument [Line Items]
Consolidated Leverage Ratio	5.75		5.75
Mandatory Prepayment Percentage	50.00%		50.00%
Revolving Credit Facility
Debt Instrument [Line Items]
Credit Facility	50,000,000		50,000,000
Undrawn amount of the Revolver	47,400,000		47,400,000
Line of Credit Facility, Amount Outstanding	2,000,000		2,000,000
Term Loan B
Debt Instrument [Line Items]
Credit Facility	375,000,000		375,000,000
Line of Credit Facility, Amount Outstanding	$ 262,000,000		$ 262,000,000