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Supplemental Cash Flow Information - Schedule of Supplemental Cash Flow Information Regarding Noncash Investing and Financing Activities (Detail) - USD ($)
$ in Thousands
12 Months Ended
Sep. 27, 2019
Sep. 28, 2018
Sep. 29, 2017
Supplemental Cash Flow Elements [Abstract]      
Cash paid for interest $ 34,157 $ 29,698 $ 30,529
Cash (refunded) paid for income taxes $ (1,931) $ 3,559 $ (3,161)