CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]	Total		Cumulative-Effect of Change in Accounting Principle, Net of Taxes (See Note 1) [Member] Common Stock [Member]	Cumulative-Effect of Change in Accounting Principle, Net of Taxes (See Note 1) [Member] Additional Paid-In Capital [Member]	Cumulative-Effect of Change in Accounting Principle, Net of Taxes (See Note 1) [Member] Accumulated Other Comprehensive Loss [Member]	Cumulative-Effect of Change in Accounting Principle, Net of Taxes (See Note 1) [Member] Retained Earnings [Member]	Cumulative-Effect of Change in Accounting Principle, Net of Taxes (See Note 1) [Member]
Balances at Jul. 31, 2020	$ 237	$ 0	$ (20,346)	$ 438,498	$ 418,389
Balances (in shares) at Jul. 31, 2020	23,697,396
Comprehensive Income:
Net income	$ 0	0	0	170,680	170,680
Other comprehensive income, net of tax	0	0	2,601	0	2,601
Comprehensive income	0	0	2,601	170,680	173,281
Cash dividends declared	0	0	0	(40)	(40)
Share-based compensation	0	1,974	0	0	1,974
Issuance of share-based compensation awards, net of shares withheld for employee taxes	$ 0	(1,974)	0	(18)	(1,992)
Issuance of share-based compensation awards, net of shares withheld for employee taxes (in shares)	22,928
Balances at Oct. 30, 2020	$ 237	0	(17,745)	609,120	591,612
Balances (in shares) at Oct. 30, 2020	23,720,324
Balances at Jul. 30, 2021	$ 235	0	0	663,398	$ 663,633	[1]
Balances (in shares) at Jul. 30, 2021	23,497,166				23,497,166
Comprehensive Income:
Net income	$ 0	0	0	33,376	$ 33,376
Other comprehensive income, net of tax	0	0	0	0	0
Comprehensive income	0	0	0	33,376	33,376
Cash dividends declared	0	0	0	(30,838)	(30,838)
Share-based compensation	0	2,309	0	0	2,309
Issuance of share-based compensation awards, net of shares withheld for employee taxes	$ 0	(2,309)	0	0	(2,309)
Issuance of share-based compensation awards, net of shares withheld for employee taxes (in shares)	22,691
Balances at Oct. 29, 2021	$ 235	$ 0	$ 0	$ 628,980	$ 629,215		$ 0	$ 0	$ 0	$ (36,956)	$ (36,956)
Balances (in shares) at Oct. 29, 2021	23,519,857				23,519,857

[1] This Condensed Consolidated Balance Sheet has been derived from the audited Consolidated Balance Sheet as of July 30, 2021, as filed with the Securities and Exchange Commission in the Company’s Annual Report on Form 10-K for the fiscal year ended July 30, 2021.