Debt Obligations - Debt & Capital Leases (Details) (USD $)	Dec. 30, 2012	Dec. 25, 2011	Dec. 30, 2012 Notes Due 2012 [Member]	Sep. 26, 2012 Notes Due 2012 [Member]	Dec. 25, 2011 Notes Due 2012 [Member]	Dec. 30, 2012 Notes Due 2015 [Member]	Dec. 25, 2011 Notes Due 2015 [Member]	Mar. 31, 2005 Notes Due 2015 [Member]	Dec. 30, 2012 Notes Due 2016 [Member]	Dec. 25, 2011 Notes Due 2016 [Member]	Nov. 30, 2010 Notes Due 2016 [Member]	Dec. 30, 2012 Option To Repurchase Headquarters Building 2019 [Member]	Dec. 25, 2011 Option To Repurchase Headquarters Building 2019 [Member]
Debt Instrument [Line Items]
Long-term debt			$ 0		$ 74,900,000	$ 244,022,000	$ 249,891,000		$ 221,523,000	$ 220,787,000		$ 224,510,000	$ 220,861,000
Interest rate on debt			4.61%	4.61%		5.00%		5.00%	6.625%		6.625%
Total long-term and short-term debt	690,055,000	766,439,000
Capital lease obligations	7,023,000	6,681,000
Total debt and capital lease obligations	697,078,000	773,120,000
Long-term debt, fair value	840,000,000	800,000,000
Long-term debt, maturities, repayments of principal in next twelve months	0
Long-term debt, maturities, repayments of principal in year two	0
Long-term debt, maturities, repayments of principal in year three	244,100,000
Long-term debt, maturities, repayments of principal in year four	225,000,000
Long-term debt, maturities, repayments of principal in year five	0
Long-term debt, maturities, repayments of principal after year five	250,000,000
Total face amount of maturities	719,100,000
Unamortized debt costs	(29,045,000)				(100,000)	(78,000)	(109,000)		(3,477,000)	(4,213,000)		(25,490,000)	(29,139,000)
Carrying value of debt	$ 690,055,000	$ 766,439,000