Debt Obligations - Debt and Capital Leases (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013		Dec. 30, 2012
Total debt and capital lease obligations
Total debt	$ 687,312		$ 690,055
Short-term capital lease obligations	115	[1]	164	[1]
Long-term capital lease obligations	6,846		6,859
Total capital lease obligations	6,961		7,023
Total debt and capital lease obligations	694,273		697,078
Option To Repurchase Headquarters Building 2019 [Member]
Total debt and capital lease obligations
Long-term debt	226,372		224,510
Senior Notes [Member] | Notes Due 2016 [Member]
Total debt and capital lease obligations
Long-term debt	216,900		221,523
Interest rate on debt	6.625%
Senior Notes [Member] | Notes Due 2015 [Member]
Total debt and capital lease obligations
Long-term debt	$ 244,040		$ 244,022
Interest rate on debt	5.00%

[1] Included in “Accrued expenses and other” in our Condensed Consolidated Balance Sheets.