Supplemental Information On Operating, Investing And Financing Activities (Supplemental Information Related To Consolidated Statements Of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 25, 2010	Dec. 26, 2009
Supplemental Information On Operating, Investing And Financing Activities [Abstract]
Cash interest paid (net of amounts capitalized)	$ 54,833	$ 62,352	$ 52,631
Cash taxes paid (refunded)	(3,317)	(54,459)	(28,320)
Non-cash asset additions under capital leases	10,025	13,251	1,813
Non-cash paid-in-kind dividends (see Note K)	$ 7,656		$ 30,506