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 Aug. 03, 2018	$ 240	$ 44,049	$ 4,685	$ 532,807	$ 581,781
Balance (in shares) at Aug. 03, 2018	24,011,550
Comprehensive Income (Loss):
Net income (loss)	$ 0	0	0	47,207	47,207
Other comprehensive income (loss), net of tax	0	0	1,293	0	1,293
Comprehensive income (loss)	0	0	1,293	47,207	48,500
Cash dividends declared	0	0	0	(30,176)	(30,176)
Share-based compensation	0	2,089	0	0	2,089
Issuance of share-based compensation awards, net of shares withheld for employee taxes	$ 0	(2,016)	0	0	(2,016)
Issuance of share-based compensation awards, net of shares withheld for employee taxes (in shares)	22,825
Balance at Nov. 02, 2018	$ 240	44,122	5,978	549,838	600,178
Balance (in shares) at Nov. 02, 2018	24,034,375
Balance at Aug. 03, 2018	$ 240	44,049	4,685	532,807	581,781
Balance (in shares) at Aug. 03, 2018	24,011,550
Comprehensive Income (Loss):
Net income (loss)					158,376
Other comprehensive income (loss), net of tax					(4,966)
Comprehensive income (loss)					153,410
Balance at May. 03, 2019	$ 241	47,500	(281)	600,563	648,023
Balance (in shares) at May. 03, 2019	24,044,402
Balance at Nov. 02, 2018	$ 240	44,122	5,978	549,838	600,178
Balance (in shares) at Nov. 02, 2018	24,034,375
Comprehensive Income (Loss):
Net income (loss)	$ 0	0	0	60,755	60,755
Other comprehensive income (loss), net of tax	0	0	(4,039)	0	(4,039)
Comprehensive income (loss)	0	0	(4,039)	60,755	56,716
Cash dividends declared	0	0	0	(30,279)	(30,279)
Share-based compensation	0	2,044	0	0	2,044
Issuance of share-based compensation awards, net of shares withheld for employee taxes	$ 0	(41)	0	0	(41)
Issuance of share-based compensation awards, net of shares withheld for employee taxes (in shares)	6,999
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 (Loss):
Net income (loss)	$ 0	0	0	50,414	50,414
Other comprehensive income (loss), net of tax	0	0	(2,220)	0	(2,220)
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
Balance at May. 03, 2019	$ 241	47,500	(281)	600,563	648,023
Balance (in shares) at May. 03, 2019	24,044,402
Balance at Aug. 02, 2019	$ 241	49,732	(6,913)	561,650	$ 604,710	[1]
Balance (in shares) at Aug. 02, 2019	24,049,240				24,049,240
Comprehensive Income (Loss):
Net income (loss)	$ 0	0	0	43,223	$ 43,223
Other comprehensive income (loss), net of tax	0	0	(438)	0	(438)
Comprehensive income (loss)	0	0	(438)	43,223	42,785
Cash dividends declared	0	0	0	(31,452)	(31,452)
Share-based compensation	0	1,798	0	0	1,798
Issuance of share-based compensation awards, net of shares withheld for employee taxes	$ 0	(1,994)	0	0	(1,994)
Issuance of share-based compensation awards, net of shares withheld for employee taxes (in shares)	18,466
Purchases and retirement of common stock	$ (1)	(14,187)	0	0	(14,188)
Purchases and retirement of common stock (in shares)	(91,748)
Balance at Nov. 01, 2019	$ 240	35,349	(7,351)	577,546	605,784
Balance (in shares) at Nov. 01, 2019	23,975,958
Balance at Aug. 02, 2019	$ 241	49,732	(6,913)	561,650	$ 604,710	[1]
Balance (in shares) at Aug. 02, 2019	24,049,240				24,049,240
Comprehensive Income (Loss):
Net income (loss)					$ (57,541)
Other comprehensive income (loss), net of tax					(12,541)
Comprehensive income (loss)					(70,082)
Balance at May. 01, 2020	$ 237	0	(19,454)	411,426	$ 392,209
Balance (in shares) at May. 01, 2020	23,693,981				23,693,981
Comprehensive Income (Loss):
Cumulative-effect of change in accounting principle	$ 0	0	0	4,125	$ 4,125
Balance at Nov. 01, 2019	$ 240	35,349	(7,351)	577,546	605,784
Balance (in shares) at Nov. 01, 2019	23,975,958
Comprehensive Income (Loss):
Net income (loss)	$ 0	0	0	61,168	61,168
Other comprehensive income (loss), net of tax	0	0	(2,049)	0	(2,049)
Comprehensive income (loss)	0	0	(2,049)	61,168	59,119
Cash dividends declared	0	0	0	(31,283)	(31,283)
Share-based compensation	0	2,122	0	0	2,122
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)	4,867
Purchases and retirement of common stock	$ 0	(5,812)	0	0	(5,812)
Purchases and retirement of common stock (in shares)	(37,577)
Balance at Jan. 31, 2020	$ 240	31,659	(9,400)	607,431	629,930
Balance (in shares) at Jan. 31, 2020	23,943,248
Comprehensive Income (Loss):
Net income (loss)	$ 0	0	0	(161,932)	(161,932)
Other comprehensive income (loss), net of tax	0	0	(10,054)	0	(10,054)
Comprehensive income (loss)	0	0	(10,054)	(161,932)	(171,986)
Cash dividends declared	0	0	0	(30,968)	(30,968)
Share-based compensation	0	251	0	0	251
Issuance of share-based compensation awards, net of shares withheld for employee taxes	$ 0	(11)	0	0	(11)
Issuance of share-based compensation awards, net of shares withheld for employee taxes (in shares)	382
Purchases and retirement of common stock	$ (3)	(31,899)	0	(3,105)	(35,007)
Purchases and retirement of common stock (in shares)	(249,649)
Balance at May. 01, 2020	$ 237	$ 0	$ (19,454)	$ 411,426	$ 392,209
Balance (in shares) at May. 01, 2020	23,693,981				23,693,981

[1] This Condensed Consolidated Balance Sheet has been derived from the audited Consolidated Balance Sheet as of August 2, 2019, as filed with the Securities and Exchange Commission in the Company’s Annual Report on Form 10-K for the fiscal year ended August 2, 2019.