Changes in Accumulated Other Comprehensive Income by Component Changes in AOCI by Component (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning	$ (5,855)	$ (14,037)	$ (10,630)	$ (15,008)
Other comprehensive income before reclassifications	(1,379)	(6,237)	1,934	(6,944)
Amounts reclassified from accumulated other comprehensive income	1,462	1,679	2,924	3,357
Net current-period other comprehensive income	83	(4,558)	4,858	(3,587)
Balance, ending	(5,772)	(18,595)	(5,772)	(18,595)
Other Comprehensive income before reclassification tax effect	(67)	702	634	1,115
Foreign currency translation adjustment, tax	1,011	1,334	(3,136)	402
Provision (benefit) for taxes	23,294	7,188	(21,100)	(23,063)
Gains and Losses on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning	(19,005)	(15,663)	(16,566)	(15,013)
Other comprehensive income before reclassifications	379	(3,920)	(3,522)	(6,248)
Amounts reclassified from accumulated other comprehensive income	1,462	1,679	2,924	3,357
Net current-period other comprehensive income	1,841	(2,241)	(598)	(2,891)
Balance, ending	(17,164)	(17,904)	(17,164)	(17,904)
Foreign Currency Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning	13,150	1,626	5,936	5
Other comprehensive income before reclassifications	(1,758)	(2,317)	5,456	(696)
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Net current-period other comprehensive income	(1,758)	(2,317)	5,456	(696)
Balance, ending	11,392	(691)	11,392	(691)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Provision (benefit) for taxes	$ (224)	$ (307)	$ (449)	$ (614)