CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Apr. 27, 2018	Apr. 28, 2017	Apr. 27, 2018	Apr. 28, 2017
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]
Net income	$ 48,747	$ 46,924	$ 186,266	$ 148,006
Other comprehensive income (loss) before income tax expense (benefit):
Change in fair value of interest rate swaps	4,330	(1,773)	12,779	15,728
Income tax expense (benefit)	1,076	(678)	4,099	6,016
Other comprehensive income (loss), net of tax	3,254	(1,095)	8,680	9,712
Comprehensive income	$ 52,001	$ 45,829	$ 194,946	$ 157,718

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e557-108580

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Amount of tax expense (benefit) allocated to other comprehensive income (loss) attributable to parent entity.

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Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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