Accumulated Other Comprehensive Income (Loss) (Changes in AOCI Components) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income Loss [Roll Forward]
Accumulated Other Comprehensive Loss, Beginning balance	$ (67,201)	$ (59,880)
Other comprehensive income (loss) before reclassifications	22,159	(11,236)
Amounts reclassified from AOCI	4,742	3,915
Other comprehensive income	26,901	(7,321)	(39,597)
Accumulated Other Comprehensive Loss, Ending balance	(40,300)	(67,201)	(59,880)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income Loss [Roll Forward]
Accumulated Other Comprehensive Loss, Beginning balance	2,945	2,280
Other comprehensive income (loss) before reclassifications	(4,529)	665
Amounts reclassified from AOCI	0	0
Other comprehensive income	(4,529)	665
Accumulated Other Comprehensive Loss, Ending balance	(1,584)	2,945
Pension and Other Postretirement Benefits [Member]
Accumulated Other Comprehensive Income Loss [Roll Forward]
Accumulated Other Comprehensive Loss, Beginning balance	(70,146)	(62,160)
Other comprehensive income (loss) before reclassifications	26,688	(11,901)
Amounts reclassified from AOCI	4,742	3,915
Other comprehensive income	31,430	(7,986)
Accumulated Other Comprehensive Loss, Ending balance	$ (38,716)	$ (70,146)