Fair Value Measurements (Details) - Recurring [Member] - USD ($) $ in Thousands		May 03, 2019	Aug. 03, 2018
Assets and Liabilities Measured at Fair Value on a Recurring Basis [Abstract]
Cash equivalents	[1]	$ 100,446	$ 38,446
Interest rate swap asset (see Note 5)		38	6,255
Total		100,484	44,701
Deferred compensation plan assets	[2]	32,218	32,669
Total assets at fair value		132,702	77,370
Interest rate swap liability (see Note 5)		1,684	0
Total liabilities at fair value		1,684	0
Level 1 [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis [Abstract]
Cash equivalents	[1]	100,446	38,446
Interest rate swap asset (see Note 5)		0	0
Total		100,446	38,446
Interest rate swap liability (see Note 5)		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 asset (see Note 5)		38	6,255
Total		38	6,255
Interest rate swap liability (see Note 5)		1,684	0
Total liabilities at fair value		1,684	0
Level 3 [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis [Abstract]
Cash equivalents	[1]	0	0
Interest rate swap asset (see Note 5)		0	0
Total		0	0
Interest rate swap liability (see Note 5)		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.