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Derivative Instruments - Effect on Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 27, 2019
Dec. 28, 2018
Derivative [Line Items]    
Gain (loss) recognized in income $ (1,700) $ 7,620
Designated as Hedging Instrument | Cash Flow Hedging | Interest rate swap agreements    
Derivative [Line Items]    
Gain (loss) recognized in income $ (6,926) $ 31,000