Fair Value Measurements (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands		Oct. 28, 2016	Jul. 29, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	[1]	$ 47,420	$ 76,084
Deferred compensation plan assets	[2]	29,225	27,764
Total assets at fair value		76,645	103,848
Interest rate swap liability (see Note 5)		16,144	22,250
Total liabilities at fair value		16,144	22,250
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	[1]	47,420	76,084
Deferred compensation plan assets	[2]	29,225	27,764
Total assets at fair value		76,645	103,848
Interest rate swap liability (see Note 5)		0	0
Total liabilities at fair value		0	0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	[1]	0	0
Deferred compensation plan assets	[2]	0	0
Total assets at fair value		0	0
Interest rate swap liability (see Note 5)		16,144	22,250
Total liabilities at fair value		16,144	22,250
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	[1]	0	0
Deferred compensation plan assets	[2]	0	0
Total assets at fair value		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.