Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended										12 Months Ended
	Aug. 02, 2019	May 03, 2019	Feb. 01, 2019	Nov. 02, 2018	Aug. 03, 2018	[1]	Apr. 27, 2018	Jan. 26, 2018		Oct. 27, 2017	Aug. 02, 2019	Aug. 03, 2018	Jul. 28, 2017
Quarterly Financial Data (Unaudited) [Abstract]
Total revenue	$ 787,098	$ 739,603	$ 811,707	$ 733,543	$ 810,893		$ 721,413	$ 787,771		$ 710,368	$ 3,071,951	$ 3,030,445	$ 2,926,289
Store operating income	119,912	102,210	112,935	100,613	118,213		98,718	112,686		107,731	435,670	437,348	454,572
Income before income taxes	75,519	60,974	72,534	57,329	78,494		59,715	72,994	[2]	67,220	266,356	278,423	298,887
Net income	$ 65,025	$ 50,414	$ 60,755	$ 47,207	$ 61,354		$ 48,747	$ 91,139		$ 46,380	$ 223,401	$ 247,620	$ 201,899
Net income per share - basic (in dollars per share)	$ 2.70	$ 2.10	$ 2.53	$ 1.97	$ 2.56		$ 2.03	$ 3.80		$ 1.93	$ 9.29	$ 10.31	$ 8.40
Net income per share - diluted (in dollars per share)	$ 2.70	$ 2.09	$ 2.52	$ 1.96	$ 2.55		$ 2.03	$ 3.79		$ 1.92	$ 9.27	$ 10.29	$ 8.37
Provisional tax benefit for re-measurement of long-term deferred tax liabilities								$ 27,032
Provisional tax benefit for re-measurement of short-term deferred tax liabilities								$ 2,500

[1] The Company's fourth quarter of fiscal 2018 consisted of 14 weeks.

[2] The Company recorded a provisional tax benefit for the re-measurement of deferred tax liabilities of $27,032 and $2,500 for long-term and short-term liabilities in the second quarter of fiscal 2018 as a result of the Tax Act.