CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Total
Balance at Jul. 28, 2017	$ 241	$ 55,659	$ (4,229)	$ 492,836	$ 544,507
Balance (in shares) at Jul. 28, 2017	24,055,682
Comprehensive Income:
Net income	$ 0	0	0	186,266	186,266
Other comprehensive income (loss), net of tax	0	0	8,680	0	8,680
Total comprehensive income (loss)	0	0	8,680	186,266	194,946
Cash dividends declared	0	0	0	(87,003)	(87,003)
Share-based compensation	0	6,063	0	0	6,063
Issuance of share-based compensation awards, net of shares withheld for employee taxes	$ 0	(3,360)	0	0	(3,360)
Issuance of share-based compensation awards, net of shares withheld for employee taxes (in shares)	47,929
Purchases and retirement of common stock	$ (1)	(14,771)	0	0	(14,772)
Purchases and retirement of common stock (in shares)	(100,000)
Balance at Apr. 27, 2018	$ 240	43,591	4,451	592,099	640,381
Balance (in shares) at Apr. 27, 2018	24,003,611
Balance at Jan. 26, 2018	$ 240	41,849	1,197	572,339	615,625
Balance (in shares) at Jan. 26, 2018	24,003,611
Comprehensive Income:
Net income	$ 0	0	0	48,747	48,747
Other comprehensive income (loss), net of tax	0	0	3,254	0	3,254
Total comprehensive income (loss)	0	0	3,254	48,747	52,001
Cash dividends declared	0	0	0	(28,987)	(28,987)
Share-based compensation	0	1,742	0	0	1,742
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	$ 0	0	0	0	0
Purchases and retirement of common stock (in shares)	0
Balance at Apr. 27, 2018	$ 240	43,591	4,451	592,099	640,381
Balance (in shares) at Apr. 27, 2018	24,003,611
Balance at Aug. 03, 2018	$ 240	44,049	4,685	532,807	$ 581,781	[1]
Balance (in shares) at Aug. 03, 2018	24,011,550				24,011,550
Comprehensive Income:
Net income	$ 0	0	0	158,376	$ 158,376
Other comprehensive income (loss), net of tax	0	0	(4,966)	0	(4,966)
Total comprehensive income (loss)	0	0	(4,966)	158,376	153,410
Cash dividends declared	0	0	0	(90,620)	(90,620)
Share-based compensation	0	5,672	0	0	5,672
Issuance of share-based compensation awards, net of shares withheld for employee taxes	$ 1	(2,221)	0	0	(2,220)
Issuance of share-based compensation awards, net of shares withheld for employee taxes (in shares)	32,852
Purchases and retirement of common stock	$ 0	0	0	0	0
Purchases and retirement of common stock (in shares)	0
Balance at May. 03, 2019	$ 241	47,500	(281)	600,563	$ 648,023
Balance (in shares) at May. 03, 2019	24,044,402				24,044,402
Balance at Feb. 01, 2019	$ 240	46,125	1,939	580,314	$ 628,618
Balance (in shares) at Feb. 01, 2019	24,041,374
Comprehensive Income:
Net income	$ 0	0	0	50,414	50,414
Other comprehensive income (loss), net of tax	0	0	(2,220)	0	(2,220)
Total comprehensive income (loss)	0	0	(2,220)	50,414	48,194
Cash dividends declared	0	0	0	(30,165)	(30,165)
Share-based compensation	0	1,539	0	0	1,539
Issuance of share-based compensation awards, net of shares withheld for employee taxes	$ 1	(164)	0	0	(163)
Issuance of share-based compensation awards, net of shares withheld for employee taxes (in shares)	3,028
Purchases and retirement of common stock	$ 0	0	0	0	0
Purchases and retirement of common stock (in shares)	0
Balance at May. 03, 2019	$ 241	$ 47,500	$ (281)	$ 600,563	$ 648,023
Balance (in shares) at May. 03, 2019	24,044,402				24,044,402

[1] This Condensed Consolidated Balance Sheet has been derived from the audited Consolidated Balance Sheet as of August 3, 2018, as filed with the Securities and Exchange Commission in the Company's Annual Report on Form 10-K for the fiscal year ended August 3, 2018.