LONG-TERM DEBT (Details 3) (USD $)	3 Months Ended									3 Months Ended					0 Months Ended		0 Months Ended	3 Months Ended
	Mar. 31, 2013	Mar. 25, 2012	Mar. 31, 2013 Revolving credit facility	Mar. 31, 2013 Revolving credit facility Period from quarter ended March 2013 through the quarter ended December 2013	Mar. 31, 2013 Revolving credit facility Minimum	Mar. 31, 2013 Revolving credit facility Maximum	Mar. 31, 2013 Revolving credit facility LIBOR	Mar. 31, 2013 Revolving credit facility LIBOR Minimum	Mar. 31, 2013 Revolving credit facility LIBOR Maximum	Mar. 31, 2013 Revolving credit facility Base rate	Mar. 31, 2013 Revolving credit facility Base rate Minimum	Mar. 31, 2013 Revolving credit facility Base rate Maximum	Dec. 18, 2012 Revolving credit facility Amendment 18, December 2012	Dec. 18, 2012 Letter of credit Amendment 18, December 2012	Dec. 18, 2012 9.00% Notes	Mar. 31, 2013 9.00% Notes	Dec. 18, 2012 11.50% senior secured notes due in 2017	Mar. 31, 2013 11.50% senior secured notes due in 2017 item
LONG-TERM DEBT
Maximum borrowing capacity													$ 75,000,000	$ 50,000,000
Outstanding letters of credit			33,600,000
Draws under the credit agreement			0
Variable rate basis							London Interbank Offered Rate			base rate
Basis spread on variable rate (as a percent)								2.75%	4.25%		1.75%	3.25%
Commitment fees for the unused revolving credit (as a percent)					0.50%	0.625%
New borrowings															910,000,000
Interest rate (as a percent)																9.00%		11.50%
Net proceeds from offering															889,000,000
Amount of debt repurchased																		846,000,000
Number of transactions to repurchase debt																		2
Aggregate principal amount of debt redeemed																	762,400,000	83,600,000
Loss on extinguishment of debt	$ 12,770,000	$ (4,433,000)															$ 94,500,000	$ 9,600,000
Maximum consolidated leverage ratio				6.00
Minimum consolidated interest coverage ratio			1.50
Dividends restricted if consolidated leverage ratio is exceeded			5.25