Fair Value Measurements, Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands		Jul. 31, 2020	Aug. 02, 2019
Assets and Liabilities Measured at Fair Value on a Recurring Basis [Abstract]
Cash equivalents	[1]	$ 132,001	$ 46
Total		132,001	46
Deferred compensation plan assets	[2]	28,530	30,593
Total assets at fair value		160,531	30,639
Interest rate swap liability (see Note 8)		27,746	10,483
Total liabilities at fair value		27,746	10,483
Level 1 [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis [Abstract]
Cash equivalents	[1]	132,001	46
Total		132,001	46
Interest rate swap liability (see Note 8)		0	0
Total liabilities at fair value		0	0
Level 2 [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis [Abstract]
Cash equivalents	[1]	0	0
Total		0	0
Interest rate swap liability (see Note 8)		27,746	10,483
Total liabilities at fair value		27,746	10,483
Level 3 [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis [Abstract]
Cash equivalents	[1]	0	0
Total		0	0
Interest rate swap liability (see Note 8)		0	0
Total liabilities at fair value		$ 0	$ 0

[1] Consists of money market fund investments.

[2] Represents plan assets invested in mutual funds established under a Rabbi Trust for the Company’s non-qualified savings plan and is included in the Consolidated Balance Sheets as other assets (see Note 14).