Accumulated Other Comprehensive Items (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013
Accumulated Other Comprehensive Items [Line Items]
Balance at Beginning of Year	$ 710	$ (3,315)
Other comprehensive (loss) income before reclassifications	(579)	(3,494)
Reclassifications from AOCI	511	574
Net current period other comprehensive (loss) income	(68)	(2,920)
Balance at End of Quarter	642	(6,235)
Foreign Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Items [Line Items]
Balance at Beginning of Year	8,919	8,124
Other comprehensive (loss) income before reclassifications	(171)	(3,466)
Reclassifications from AOCI	0	0
Net current period other comprehensive (loss) income	(171)	(3,466)
Balance at End of Quarter	8,748	4,658
Unrecognized Prior Service Cost [Member]
Accumulated Other Comprehensive Items [Line Items]
Balance at Beginning of Year	(657)	(748)
Other comprehensive (loss) income before reclassifications	(51)	0
Reclassifications from AOCI	47	46
Net current period other comprehensive (loss) income	(4)	46
Balance at End of Quarter	(661)	(702)
Deferred Loss on Pension and Other Post Retirement Plans [Member]
Accumulated Other Comprehensive Items [Line Items]
Balance at Beginning of Year	(6,919)	(9,645)
Other comprehensive (loss) income before reclassifications	(1)	9
Reclassifications from AOCI	115	202
Net current period other comprehensive (loss) income	114	211
Balance at End of Quarter	(6,805)	(9,434)
Deferred Loss on Hedging Instruments [Member]
Accumulated Other Comprehensive Items [Line Items]
Balance at Beginning of Year	(633)	(1,046)
Other comprehensive (loss) income before reclassifications	(356)	(37)
Reclassifications from AOCI	349	326
Net current period other comprehensive (loss) income	(7)	289
Balance at End of Quarter	$ (640)	$ (757)