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Accumulated Other Comprehensive Income (Loss) (Activity and Classification of Derivative Deferral in AOCI) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 30, 2019
Mar. 31, 2018
Mar. 30, 2019
Mar. 31, 2018
Derivative Instruments, Gain (Loss)        
Net deferral in AOCIL of derivatives (effective portion) $ 43 $ (1,025) $ 707 $ 420
Net gain (loss) 43 (1,025) 707 420
Tax effect (8) 256 (178) (284)
Net deferral in AOCIL of derivatives 35 (769) 529 136
Foreign Currency Contracts        
Derivative Instruments, Gain (Loss)        
Net deferral in AOCIL of derivatives (effective portion) 150 (1,655) 1,049 (827)
Net gain (loss) 150 (1,655) 1,049 (827)
Interest Rate Swaps        
Derivative Instruments, Gain (Loss)        
Net deferral in AOCIL of derivatives (effective portion) (107) 630 (342) 1,247
Net gain (loss) $ (107) $ 630 $ (342) $ 1,247