Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Debt (Detail) - USD ($)		9 Months Ended
Debt (Detail) - USD ($)	May 03, 2018	Apr. 01, 2018
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 125,000,000
Available borrowings		24,035,000
Letters of credit		96,800,000
Capital leases		$ 235,000
Effective interest rate percent		4.53%
Letter of Credit
Debt Instrument [Line Items]
Letters of credit		$ 3,930,000
Minimum \| Revolving Credit Facility
Debt Instrument [Line Items]
Unused commitment fees		0.20%
Minimum \| LIBOR \| Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate		1.00%
Minimum \| Bank Base Rate \| Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate		0.00%
Maximum \| Revolving Credit Facility
Debt Instrument [Line Items]
Unused commitment fees		0.50%
Maximum \| LIBOR \| Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate		3.75%
Maximum \| Bank Base Rate \| Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate		2.75%
Subsequent Event \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 120,000,000
Subsequent Event \| Minimum \| LIBOR \| Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate	3.50%
Subsequent Event \| Minimum \| Bank Base Rate \| Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate	2.50%
Subsequent Event \| Maximum \| LIBOR \| Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate	4.50%
Subsequent Event \| Maximum \| Bank Base Rate \| Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate	3.50%