Fair Value Measurements, Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Recurring [Member] - USD ($) $ in Thousands		Jan. 31, 2020	Aug. 02, 2019
Assets and Liabilities Measured at Fair Value on a Recurring Basis [Abstract]
Cash equivalents	[1]	$ 34,401	$ 46
Deferred compensation plan assets	[2]	32,758	30,593
Total assets at fair value		67,159	30,639
Interest rate swap liability (see Note 7)		13,479	10,483
Total liabilities at fair value		13,479	10,483
Level 1 [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis [Abstract]
Cash equivalents	[1]	34,401	46
Interest rate swap liability (see Note 7)		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
Interest rate swap liability (see Note 7)		13,479	10,483
Total liabilities at fair value		13,479	10,483
Level 3 [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis [Abstract]
Cash equivalents	[1]	0	0
Interest rate swap liability (see Note 7)		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 Condensed Consolidated Balance Sheets as other assets.