Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 01, 2017	Oct. 02, 2016
Reclassifications out of accumulated other comprehensive income (loss)
Balance at the beginning of the period	$ 869,259
Other comprehensive income before reclassifications	30,257	$ 17,107
Amounts reclassified from accumulated other comprehensive income	(749)	(1,944)
Net current-period other comprehensive income	29,508	15,163
Balance at the end of the period	928,453	869,259
Foreign Currency Translation Adjustments
Reclassifications out of accumulated other comprehensive income (loss)
Balance at the beginning of the period	(126,840)	(141,229)
Other comprehensive income before reclassifications	27,894	14,389
Amounts reclassified from accumulated other comprehensive income	0	0
Net current-period other comprehensive income	27,894	14,389
Balance at the end of the period	(98,946)	(126,840)
Gain (Loss) on Derivative Instruments
Reclassifications out of accumulated other comprehensive income (loss)
Balance at the beginning of the period	(1,168)	(1,942)
Other comprehensive income before reclassifications	2,363	2,718
Amounts reclassified from accumulated other comprehensive income	(749)	(1,944)
Net current-period other comprehensive income	1,614	774
Balance at the end of the period	446	(1,168)
Accumulated Other Comprehensive Income (Loss)
Reclassifications out of accumulated other comprehensive income (loss)
Balance at the beginning of the period	(128,008)	(143,171)
Balance at the end of the period	$ (98,500)	$ (128,008)