Changes in Accumulated Other Comprehensive Income by Component (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Beginning balance	$ 45,299	$ 27,900	$ 47,128	$ 38,556
Other comprehensive income before reclassifications	(43,260)	18,372	(46,718)	7,090
Cost of goods sold	119,175	113,751	366,220	347,970
Other income (expense)	(831)	(661)	(1,907)	(3,618)
Net current period other comprehensive income	(40,726)	18,252	(42,555)	7,596
Ending balance	4,573	46,152	4,573	46,152
Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Revenues	(1)		(47)
Cost of goods sold	2,486	(120)	4,152	460
Other income (expense)	49		58	46
Total reclassification out of AOCI	2,534	(120)	4,163	506
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Beginning balance	47,109	29,537	48,865	38,890
Other comprehensive income before reclassifications	(37,778)	17,126	(39,534)	7,773
Net current period other comprehensive income	(37,778)	17,126	(39,534)	7,773
Ending balance	9,331	46,663	9,331	46,663
Accumulated Translation Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Revenues	0		0
Cost of goods sold	0	0	0	0
Other income (expense)	0		0	0
Total reclassification out of AOCI	0	0	0	0
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Beginning balance	29	1	(11)	4
Other comprehensive income before reclassifications	(52)	24	(12)	21
Net current period other comprehensive income	(52)	24	(12)	21
Ending balance	(23)	25	(23)	25
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Revenues	0		0
Cost of goods sold	0	0	0	0
Other income (expense)	0		0	0
Total reclassification out of AOCI	0	0	0	0
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Beginning balance	(519)	(890)	(552)	(819)
Other comprehensive income before reclassifications	45	(70)	78	(141)
Net current period other comprehensive income	45	(70)	78	(141)
Ending balance	(474)	(960)	(474)	(960)
Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Revenues	0		0
Cost of goods sold	0	0	0	0
Other income (expense)	0		0	0
Total reclassification out of AOCI	0	0	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	(1,320)	(748)	(1,174)	481
Other comprehensive income before reclassifications	(5,475)	1,292	(7,250)	(563)
Net current period other comprehensive income	(2,941)	1,172	(3,087)	(57)
Ending balance	(4,261)	424	(4,261)	424
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]
Revenues	(1)		(47)
Cost of goods sold	2,486	(120)	4,152	460
Other income (expense)	49		58	46
Total reclassification out of AOCI	$ 2,534	$ (120)	$ 4,163	$ 506