Guarantor/Non-Guarantor Financial Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		1 Months Ended	12 Months Ended		1 Months Ended
	Jun. 26, 2011	Dec. 31, 2011	Apr. 30, 2010 6.625% senior unsecured notes due in April 2020	Dec. 31, 2011 6.625% senior unsecured notes due in April 2020	Dec. 25, 2010 6.625% senior unsecured notes due in April 2020	Jun. 30, 2011 6.875% Senior Subordinated Notes
Long-term debt:
Face amount of debt issued to finance acquisition	$ 150,000		$ 300,000	$ 300,000	$ 300,000	$ 150,000
Parent company's percentage ownership of Guarantors		100.00%