Fair Value Measurements (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands		Aug. 03, 2018	Jul. 28, 2017
Assets and Liabilities Measured at Fair Value on a Recurring Basis [Abstract]
Cash equivalents	[1]		$ 82,524
Interest rate swap asset (see Note 6)			32
Deferred compensation plan assets	[2]		31,196
Total assets at fair value		$ 77,370	113,752
Interest rate swap liability (see Note 6)		0	6,880
Total liabilities at fair value		0	6,880
Level 1, 2 and 3 [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis [Abstract]
Cash equivalents	[1]	38,446
Interest rate swap asset (see Note 6)		6,255
Total		44,701
Level 1 [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis [Abstract]
Cash equivalents	[1]	38,446	82,524
Interest rate swap asset (see Note 6)		0	0
Total		38,446
Deferred compensation plan assets	[2]		31,196
Total assets at fair value			113,720
Interest rate swap liability (see Note 6)		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 6)		6,255	32
Total		6,255
Deferred compensation plan assets	[2]		0
Total assets at fair value			32
Interest rate swap liability (see Note 6)		0	6,880
Total liabilities at fair value		0	6,880
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 6)		0	0
Total		0
Deferred compensation plan assets	[2]		0
Total assets at fair value			0
Interest rate swap liability (see Note 6)		0	0
Total liabilities at fair value		0	$ 0
Measured at Net Asset Value [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis [Abstract]
Deferred compensation plan assets	[2]	$ 32,669

[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 12).