Reclassifications Out of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 02, 2017	Mar. 27, 2016	Apr. 02, 2017	Mar. 27, 2016
Reclassifications out of accumulated other comprehensive loss
Balance at the beginning of the period			$ 869,259
Balance at the end of the period	$ 902,697		902,697
Foreign Currency Translation Adjustments
Reclassifications out of accumulated other comprehensive loss
Balance at the beginning of the period	(143,026)	$ (157,713)	(126,844)	$ (141,229)
Other comprehensive income (loss) before reclassifications	9,323	26,576	(6,859)	10,092
Net current-period other comprehensive income (loss)	9,323	26,576	(6,859)	10,092
Balance at the end of the period	(133,703)	(131,137)	(133,703)	(131,137)
Gain (Loss) on Derivative Instruments
Reclassifications out of accumulated other comprehensive loss
Balance at the beginning of the period	(168)	(832)	(1,164)	(1,942)
Other comprehensive income (loss) before reclassifications	689	(144)	2,027	1,527
Reclassification adjustment of prior derivative settlement, net of tax	(237)	(453)	(579)	(1,014)
Net current-period other comprehensive income (loss)	452	(597)	1,448	513
Balance at the end of the period	284	(1,429)	284	(1,429)
Accumulated Other Comprehensive Loss
Reclassifications out of accumulated other comprehensive loss
Balance at the beginning of the period	(143,194)	(158,545)	(128,008)	(143,171)
Other comprehensive income (loss) before reclassifications	10,012	26,432	(4,832)	11,619
Reclassification adjustment of prior derivative settlement, net of tax	(237)	(453)	(579)	(1,014)
Net current-period other comprehensive income (loss)	9,775	25,979	(5,411)	10,605
Balance at the end of the period	$ (133,419)	$ (132,566)	$ (133,419)	$ (132,566)