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Postretirement Benefits Amounts Recognized in Accumulated Other Comprehensive Income (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 29, 2013
Dec. 30, 2012
Compensation and Retirement Disclosure [Abstract]    
Prior service cost $ 3,037 $ 3,394
Net gain (1,891) (2,311)
Deferred Tax Liabilities, Other Comprehensive Income (444) (414)
Accumulated other comprehensive income $ 702 $ 669