Retirement Plans (Amount Recongized in the Balance Sheet) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Pension Plans, Defined Benefit [Member]
Liabilities [Abstract]
Other current liabilities	$ 0	$ 0
Other liabilities	58,234	120,112
Total liabilities	58,234	120,112
Supplemental Employee Retirement Plans, Defined Benefit [Member]
Liabilities [Abstract]
Other current liabilities	2,077	2,135
Other liabilities	15,747	17,468
Total liabilities	17,824	19,603
Other Postretirement Benefit Plans, Defined Benefit [Member]
Liabilities [Abstract]
Other current liabilities	250	262
Other liabilities	1,825	2,217
Total liabilities	$ 2,075	$ 2,479