Changes in Accumulated Other Comprehensive Income by Component (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Beginning balance	$ 21,231		$ 38,556
Other comprehensive income before reclassifications	6,365		(11,282)
Cost of goods sold	115,581	117,023	234,219	236,467
Other income (expense)	(1,452)	(1,255)	(2,957)	(3,318)
Net current period other comprehensive income	6,669		(10,656)
Ending balance	27,900		27,900
Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Cost of goods sold	283		580
Other income (expense)	21		46
Total reclassification out of AOCI	304		626
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Beginning balance	23,176		38,890
Other comprehensive income before reclassifications	6,361		(9,353)
Net current period other comprehensive income	6,361		(9,353)
Ending balance	29,537		29,537
Accumulated Translation Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Cost of goods sold	0		0
Other income (expense)	0		0
Total reclassification out of AOCI	0		0
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Beginning balance	11		4
Other comprehensive income before reclassifications	(10)		(3)
Net current period other comprehensive income	(10)		(3)
Ending balance	1		1
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Cost of goods sold	0		0
Other income (expense)	0		0
Total reclassification out of AOCI	0		0
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Beginning balance	(834)		(819)
Other comprehensive income before reclassifications	(56)		(71)
Net current period other comprehensive income	(56)		(71)
Ending balance	(890)		(890)
Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Cost of goods sold	0		0
Other income (expense)	0		0
Total reclassification out of AOCI	0		0
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Beginning balance	(1,122)		481
Other comprehensive income before reclassifications	70		(1,855)
Net current period other comprehensive income	374		(1,229)
Ending balance	(748)		(748)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Cost of goods sold	283		580
Other income (expense)	21		46
Total reclassification out of AOCI	$ 304		$ 626