Accumulated Other Comprehensive Income (Loss) (Changes in AOCI Components) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 28, 2014
Accumulated Other Comprehensive Income Loss [Roll Forward]
Accumulated Other Comprehensive Loss, Beginning balance	$ (40,300)
Other comprehensive income before reclassifications	733
Amounts reclassified from AOCI	960
Other comprehensive income	1,693
Accumulated Other Comprehensive Loss, Ending balance	(38,607)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income Loss [Roll Forward]
Accumulated Other Comprehensive Loss, Beginning balance	(1,584)
Other comprehensive income before reclassifications	733
Amounts reclassified from AOCI	0
Other comprehensive income	733
Accumulated Other Comprehensive Loss, Ending balance	(851)
Pension and Other Postretirement Benefits [Member]
Accumulated Other Comprehensive Income Loss [Roll Forward]
Accumulated Other Comprehensive Loss, Beginning balance	(38,716)
Other comprehensive income before reclassifications	0
Amounts reclassified from AOCI	960
Other comprehensive income	960
Accumulated Other Comprehensive Loss, Ending balance	$ (37,756)