CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2020	Aug. 02, 2019	Aug. 03, 2018
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) [Abstract]
Net income (loss)	$ (32,475)	$ 223,401	$ 247,620
Other comprehensive income (loss) before income tax expense (benefit):
Change in fair value of interest rate swaps	(17,740)	(15,466)	13,103
Income tax expense (benefit)	(4,307)	(3,868)	4,189
Other comprehensive income (loss), net of tax	(13,433)	(11,598)	8,914
Comprehensive income (loss)	$ (45,908)	$ 211,803	$ 256,534