LONG-TERM DEBT (Details 2) (USD $)	3 Months Ended		0 Months Ended				0 Months Ended	3 Months Ended		0 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Jan. 24, 2013 New Revolving Credit Facility and Term Loan A Facility	Mar. 31, 2013 New Term Loan B Facility	Mar. 31, 2013 New Incremental Term Loan B Facility	Mar. 31, 2013 New Term Loan A Facility	Feb. 22, 2013 Repriced Term Loan B Facility	Mar. 31, 2013 Repriced Term Loan B Facility	Feb. 21, 2013 Repriced Term Loan B Facility	Feb. 21, 2013 Repriced Term Loan B Facility Base rate	Feb. 21, 2013 Repriced Term Loan B Facility LIBO
Long-term debt, net of unamortized debt discount
Interest rate margin (as a percent)										1.75%	2.75%
Effective rate (as a percent)				4.07%	4.07%	2.41%
Reduction in applicable margins ( as a percent)			0.75%
Variable rate basis										Base rate	LIBO
Variable rate floor											0.75%
Quarterly amortization of credit facilities, initial rate (as a percent)									1.00%
Prepayment premium paid							$ 23,000,000
Prepayment premium rate (as a percent)							1.00%
Loss on extinguishment of debt	$ 21,379,000	$ 133,000						$ 21,400,000