Income Taxes (Withholding Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Apr. 01, 2016	Mar. 31, 2017	Apr. 01, 2016
Income Tax Disclosure [Abstract]
Withholding taxes	$ 13,408	$ 12,406	$ 22,399	$ 22,188