LONG-TERM DEBT LIABILITIES - Senior Unsecured Debt (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2009	Dec. 31, 2014
Debt Instrument [Line Items]
Deferred Finance Costs, Current, Net		$ 200,000
Senior Unsecured Debt
Debt Instrument [Line Items]
Net Proceeds	212,700,000
Debt Instrument Original Issue Discount	2,900,000
Minimum denominations			2,000
Deferred Finance Costs, Current, Net	$ 6,100,000
Senior Unsecured Debt | On or After December 1, 2015
Debt Instrument [Line Items]
Redemption of the principal amount			105.25%
Senior Unsecured Debt | After December 1, 2017
Debt Instrument [Line Items]
Redemption of the principal amount			100.00%
Senior Unsecured Debt | On Or After December 1, 2016 [Member]
Debt Instrument [Line Items]
Redemption of the principal amount			102.625%