CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income (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 Income (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. 31, 2020	$ 237	0	(20,346)	438,498	418,389
Balances (in shares) at Jul. 31, 2020	23,697,396
Comprehensive Income:
Net income					218,150
Other comprehensive income, net of tax					6,625
Comprehensive income					224,775
Balances at Apr. 30, 2021	$ 237	5,061	(13,721)	656,536	648,113
Balances (in shares) at Apr. 30, 2021	23,726,372
Balances at Oct. 30, 2020	$ 237	0	(17,745)	609,120	591,612
Balances (in shares) at Oct. 30, 2020	23,720,324
Comprehensive Income:
Net income	$ 0	0	0	14,000	14,000
Other comprehensive income, net of tax	0	0	1,066	0	1,066
Comprehensive income	0	0	1,066	14,000	15,066
Cash dividends declared	0	0	0	(52)	(52)
Share-based compensation	0	1,992	0	0	1,992
Issuance of share-based compensation awards, net of shares withheld for employee taxes	$ 0	(25)	0	18	(7)
Issuance of share-based compensation awards, net of shares withheld for employee taxes (in shares)	4,088
Balances at Jan. 29, 2021	$ 237	1,967	(16,679)	623,086	608,611
Balances (in shares) at Jan. 29, 2021	23,724,412
Comprehensive Income:
Net income	$ 0	0	0	33,470	33,470
Other comprehensive income, net of tax	0	0	2,958	0	2,958
Comprehensive income	0	0	2,958	33,470	36,428
Cash dividends declared	0	0	0	(20)	(20)
Share-based compensation	0	3,222	0	0	3,222
Issuance of share-based compensation awards, net of shares withheld for employee taxes	$ 0	(128)	0	0	(128)
Issuance of share-based compensation awards, net of shares withheld for employee taxes (in shares)	1,960
Balances at Apr. 30, 2021	$ 237	5,061	(13,721)	656,536	648,113
Balances (in shares) at Apr. 30, 2021	23,726,372
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
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					$ 98,516
Other comprehensive income, net of tax					0
Comprehensive income					98,516
Balances at Apr. 29, 2022	$ 229	0	0	564,000	$ 564,229
Balances (in shares) at Apr. 29, 2022	22,912,320				22,912,320
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
Comprehensive Income:
Net income	$ 0	0	0	37,624	37,624
Other comprehensive income, net of tax	0	0	0	0	0
Comprehensive income	0	0	0	37,624	37,624
Cash dividends declared	0	0	0	(30,471)	(30,471)
Share-based compensation	0	2,203	0	0	2,203
Issuance of share-based compensation awards, net of shares withheld for employee taxes	$ 0	(237)	0	0	(237)
Issuance of share-based compensation awards, net of shares withheld for employee taxes (in shares)	8,339
Purchases and retirement of common stock	$ (3)	(1,966)	0	(32,261)	(34,230)
Purchases and retirement of common stock (in shares)	(279,664)
Balances at Jan. 28, 2022	$ 232	0	0	603,872	604,104
Balances (in shares) at Jan. 28, 2022	23,248,532
Comprehensive Income:
Net income	$ 0	0	0	27,516	27,516
Other comprehensive income, net of tax	0	0	0	0	0
Comprehensive income	0	0	0	27,516	27,516
Cash dividends declared	0	0	0	(30,110)	(30,110)
Share-based compensation	0	1,906	0	0	1,906
Issuance of share-based compensation awards, net of shares withheld for employee taxes	$ 0	0	0	0	0
Issuance of share-based compensation awards, net of shares withheld for employee taxes (in shares)	0
Purchases and retirement of common stock	$ (3)	(1,906)	0	(37,278)	(39,187)
Purchases and retirement of common stock (in shares)	(336,212)
Balances at Apr. 29, 2022	$ 229	$ 0	$ 0	$ 564,000	$ 564,229
Balances (in shares) at Apr. 29, 2022	22,912,320				22,912,320

[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.