Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Jul. 31, 2020		May 01, 2020		Jan. 31, 2020	Nov. 01, 2019	Aug. 02, 2019	[1],[2]	May 03, 2019	[2],[3]	Feb. 01, 2019	Nov. 02, 2018	Jul. 31, 2020	Aug. 02, 2019	Aug. 03, 2018
Quarterly Financial Data (Unaudited) [Abstract]
Total revenue	$ 495,065	[1],[2]	$ 432,544	[2],[3]	$ 846,143	$ 749,040	$ 787,098		$ 739,603		$ 811,707	$ 733,543	$ 2,522,792	$ 3,071,951	$ 3,030,445
Income before income taxes	30,135	[1],[2]	(84,274)	[2],[3]	75,630	59,793	75,519		60,974		72,534	57,329	81,284	266,356	278,423
Net income (loss)	$ 25,066	[1],[2]	$ (161,932)	[2],[3]	$ 61,168	$ 43,223	$ 65,025		$ 50,414		$ 60,755	$ 47,207	$ (32,475)	$ 223,401	$ 247,620
Net income (loss) per share - basic (in dollars per share)	$ 1.06	[1],[2]	$ (6.81)	[2],[3]	$ 2.55	$ 1.80	$ 2.70		$ 2.10		$ 2.53	$ 1.97	$ (1.36)	$ 9.29	$ 10.31
Net income (loss) per share - diluted (in dollars per share)	$ 1.05	[1],[2]	$ (6.81)	[2],[3]	$ 2.55	$ 1.79	$ 2.70		$ 2.09		$ 2.52	$ 1.96	$ (1.36)	$ 9.27	$ 10.29
Gain on sale lease back transactions	$ 69,954												$ 69,954	$ 0	$ 0
Equity method investments [Abstract]
Loss from unconsolidated subsidiary													(142,442)	$ 0	$ 0
PBS HC [Member]
Equity method investments [Abstract]
Loss from unconsolidated subsidiary			$ (132,878)										$ (132,878)

[1] In the fourth quarter of 2020, the Company completed a sale and leaseback transaction and recorded a gain on the sale and leaseback transaction of $69,954.

[2] The Company’s operating results were adversely affected by the impact of the COVID-19 pandemic.

[3] In the third quarter of 2020, the Company recorded a loss of $132,878, which represented its equity investment in PBS HC and its receivable related to the principal and accumulated interest amounts on PBS HC promissory notes.  See Note 3 for further information regarding the Company’s investment in PBS HC.