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Employee Benefit Plans Employee Benefit Plans (Defined Contribution Expense) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Apr. 02, 2016
Apr. 04, 2015
Apr. 02, 2016
Apr. 04, 2015
Defined Contribution Plan Disclosure        
Defined contribution plan expense $ 4,830 $ 5,022 $ 9,909 $ 10,242
United States        
Defined Contribution Plan Disclosure        
Defined contribution plan expense 3,359 3,409 6,800 6,943
Foreign        
Defined Contribution Plan Disclosure        
Defined contribution plan expense $ 1,471 $ 1,613 $ 3,109 $ 3,299