Debt - Additional Information (Details) € in Thousands, $ in Thousands		12 Months Ended
	Sep. 25, 2020	Jul. 31, 2019 USD ($) Rate	Aug. 01, 2019 USD ($)	Jul. 31, 2018 USD ($)	May 13, 2010 EUR (€)
Debt Instruments [Abstract]
Letters of credit outstanding		$ 3,271		$ 3,043
Ratio Of debt to EBITDA		equal to 0.3 to 1.0
Interest expense coverage ratio		equal to 71.9 to 1.0
Long-term debt, fair value		$ 51,566		55,707
Current maturities on long-term debt		50,166		0
Long-term debt				52,618
Revolving Credit Facility [Member]
Line of Credit Facilities [Line Items]
Line of credit, current borrowing capacity		300,000
Line of credit, maximum borrowing capacity		$ 450,000
Private Placement [Member]
Debt Instruments [Abstract]
Debt face amount | €					€ 75,000
Euro-denominated notes payable in 2017 at a fixed rate of 3.71% [Member]
Debt Instruments [Abstract]
Debt face amount | €					30,000
Long-term debt, fixed interest rate percentage | Rate		3.71%
Euro-denominated notes payable in 2020 at a fixed rate of 4.24% [Member]
Debt Instruments [Abstract]
Debt face amount | €					€ 45,000
Long-term debt, fixed interest rate percentage | Rate		4.24%
Current maturities on long-term debt		$ 50,166
Long-term debt				$ 52,618
USD-Denominated Borrowing Credit Revolver [Member]
Line of Credit Facilities [Line Items]
Line of credit facility, maximum amount outstanding during period		7,901
Line of credit, remaining borrowing capacity		296,729
Line of credit facility, maximum remaining borrowing capacity		$ 446,729
Subsequent Event [Member]
Line of Credit Facilities [Line Items]
Line of credit, current borrowing capacity			$ 200,000
Line of credit, maximum borrowing capacity			$ 400,000
Line of credit facility, expiration date	Sep. 25, 2020