Changes in Accumulated Other Comprehensive Income by Component Changes in AOCI by Component (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2016	Sep. 27, 2015	Sep. 25, 2016	Sep. 27, 2015
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance, beginning	$ (4,191)	$ (5,772)	$ 3,291	$ (10,630)
Other comprehensive income before reclassifications	1,397	3,248	(9,407)	5,182
Amounts reclassified from accumulated other comprehensive income	1,994	1,462	5,316	4,386
Net current-period other comprehensive income	3,391	4,710	(4,091)	9,568
Balance, ending	(800)	(1,062)	(800)	(1,062)
Other Comprehensive income before reclassification tax effect	0	797	711	1,431
Foreign currency translation adjustment, tax	(803)	(4,418)	3,131	(7,554)
Provision (benefit) for taxes	(62,918)	(58,934)	(65,339)	(37,834)
Gains and Losses on Cash Flow Hedges [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance, beginning	(19,938)	(17,164)	(19,300)	(16,566)
Other comprehensive income before reclassifications	0	(4,440)	(3,960)	(7,962)
Amounts reclassified from accumulated other comprehensive income	1,994	1,462	5,316	4,386
Net current-period other comprehensive income	1,994	(2,978)	1,356	(3,576)
Balance, ending	(17,944)	(20,142)	(17,944)	(20,142)
Foreign Currency Items [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance, beginning	15,747	11,392	22,591	5,936
Other comprehensive income before reclassifications	1,397	7,688	(5,447)	13,144
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Net current-period other comprehensive income	1,397	7,688	(5,447)	13,144
Balance, ending	17,144	19,080	17,144	19,080
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)	$ (990)	$ (673)