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Employee Benefit Plans (Defined Contribution Expense) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 30, 2019
Mar. 31, 2018
Mar. 30, 2019
Mar. 31, 2018
Defined Contribution Pension Plans        
Defined Contribution Plan Disclosure        
Pension expense for defined contribution plans $ 6,053 $ 5,489 $ 11,863 $ 10,678
U.S. Plans        
Defined Contribution Plan Disclosure        
Pension expense for defined contribution plans 4,713 4,136 9,327 8,108
Non-U.S. Plans        
Defined Contribution Plan Disclosure        
Pension expense for defined contribution plans $ 1,340 $ 1,353 $ 2,536 $ 2,570