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Long-Term Debt (Detail) - USD ($)
$ in Thousands
Sep. 30, 2016
Oct. 02, 2015
Debt Instrument [Line Items]    
Credit facility $ 155,000 $ 160,000
Government refundable advances 44,994 43,326
Debt issuance costs (5,609) (6,542)
Obligation under capital leases 67,765 57,987
Total long-term debt 870,570 874,833
Less current maturities 16,774 13,376
Carrying amount of long-term debt 853,796 861,457
U.S. Credit Facility    
Debt Instrument [Line Items]    
Credit facility 155,000 160,000
U.S. Term Loan, due April 2020    
Debt Instrument [Line Items]    
Term Loan 237,500 250,000
3.625% Senior Notes, due April 2023    
Debt Instrument [Line Items]    
Senior Notes $ 370,920 $ 370,062