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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Apr. 01, 2016	Mar. 31, 2017	Apr. 01, 2016
Income Tax Contingency [Line Items]
Effective income tax rate (percent)	27.00%	29.90%	28.10%	23.30%
Income tax benefit	$ 16,326	$ 27,067	$ 41,053	$ 34,548
Release of valuation allowance				$ 11,200
Decrease in uncertain tax positions			10,000
Foreign Affiliate
Income Tax Contingency [Line Items]
Income tax benefit	3,300
IRS Audit
Income Tax Contingency [Line Items]
Income tax benefit	1,900
Foreign Country
Income Tax Contingency [Line Items]
Reversal of accrued interest expense	2,700		2,700
Reversal of accrued penalties	$ 5,100		$ 5,100

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
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