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Derivative Instruments - Effect on Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
3 Months Ended
Jan. 01, 2021
Dec. 27, 2019
Derivative [Line Items]    
Interest rate swap agreements $ (11,826) $ 1,700
Designated as Hedging Instrument | Cash Flow Hedging | Interest rate swap agreements    
Derivative [Line Items]    
Interest rate swap agreements $ (1,242) $ 6,926