Changes in Accumulated Other Comprehensive Income by Component Changes in AOCI by Component (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 26, 2016	Jun. 28, 2015	Jun. 26, 2016	Jun. 28, 2015
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance, beginning	$ (3,735)	$ (5,855)	$ 3,291	$ (10,630)
Other comprehensive income before reclassifications	(2,449)	(1,379)	(10,804)	1,934
Amounts reclassified from accumulated other comprehensive income	1,993	1,462	3,322	2,924
Net current-period other comprehensive income	(456)	83	(7,482)	4,858
Balance, ending	(4,191)	(5,772)	(4,191)	(5,772)
Other Comprehensive income before reclassification tax effect	0	(67)	711	634
Foreign currency translation adjustment, tax	1,414	1,011	3,934	(3,136)
Provision (benefit) for taxes	(21,803)	(23,294)	(2,421)	21,100
Gains and Losses on Cash Flow Hedges [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance, beginning	(21,931)	(19,005)	(19,300)	(16,566)
Other comprehensive income before reclassifications	0	379	(3,960)	(3,522)
Amounts reclassified from accumulated other comprehensive income	1,993	1,462	3,322	2,924
Net current-period other comprehensive income	1,993	1,841	(638)	(598)
Balance, ending	(19,938)	(17,164)	(19,938)	(17,164)
Foreign Currency Items [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance, beginning	18,196	13,150	22,591	5,936
Other comprehensive income before reclassifications	(2,449)	(1,758)	(6,844)	5,456
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Net current-period other comprehensive income	(2,449)	(1,758)	(6,844)	5,456
Balance, ending	15,747	11,392	15,747	11,392
Reclassification out of Accumulated Other Comprehensive Income [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Provision (benefit) for taxes	$ (371)	$ (224)	$ (619)	$ (449)