Summary of Significant Accounting Policies (Components of Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, December 30, 2012	$ 795	[1]
Other comprehensive income (loss) before reclassficiations	(3,173)
Amounts reclassified from other comprehensive income (loss)	124
Net other comprehensive income (loss)	(3,049)
Balance, March 31, 2013	(2,254)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, December 30, 2012	(17,765)
Other comprehensive income (loss) before reclassficiations	562
Amounts reclassified from other comprehensive income (loss)	282
Net other comprehensive income (loss)	844
Balance, March 31, 2013	(16,921)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, December 30, 2012	21
Other comprehensive income (loss) before reclassficiations	1
Amounts reclassified from other comprehensive income (loss)	(158)
Net other comprehensive income (loss)	(157)
Balance, March 31, 2013	(136)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, December 30, 2012	18,539
Other comprehensive income (loss) before reclassficiations	(3,736)
Amounts reclassified from other comprehensive income (loss)	0
Net other comprehensive income (loss)	(3,736)
Balance, March 31, 2013	$ 14,803

[1] Derived from the Company’s audited Consolidated Financial Statements at December 30, 2012.