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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 30, 2021	Feb. 01, 2020	Jan. 30, 2021	Feb. 01, 2020
Changes in Accumulated Other Comprehensive Income (Loss) By Component
Stockholders' equity, beginning balance	$ 428,587	$ 408,614	$ 401,037	$ 396,000
Other comprehensive income (loss) before reclassifications	1,540	900	654	2,483
Amounts reclassified from AOCI	1	(2)	(114)	(2)
Total other comprehensive income (loss), net of tax	1,541	898	540	2,481
Stockholders' equity, ending balance	433,534	438,910	433,534	438,910
Tax (benefit) expense for gains and losses on available-for-sale securities		267		142
Available-for-sale Securities
Changes in Accumulated Other Comprehensive Income (Loss) By Component
Stockholders' equity, beginning balance	550	219	1,213	391
Other comprehensive income (loss) before reclassifications	(389)	249	(937)	77
Amounts reclassified from AOCI	1	(2)	(114)	(2)
Total other comprehensive income (loss), net of tax	(388)	247	(1,051)	75
Stockholders' equity, ending balance	162	466	162	466
Foreign Currency Translation
Changes in Accumulated Other Comprehensive Income (Loss) By Component
Stockholders' equity, beginning balance	1,177	1,177	1,515	(578)
Other comprehensive income (loss) before reclassifications	1,929	651	1,591	2,406
Amounts reclassified from AOCI	0	0	0	0
Total other comprehensive income (loss), net of tax	1,929	651	1,591	2,406
Stockholders' equity, ending balance	3,106	1,828	3,106	1,828
Accumulated Other Comprehensive Income (Loss)
Changes in Accumulated Other Comprehensive Income (Loss) By Component
Stockholders' equity, beginning balance	1,727	1,396	2,728	(187)
Total other comprehensive income (loss), net of tax	1,541	898	540	2,481
Stockholders' equity, ending balance	$ 3,268	$ 2,294	$ 3,268	$ 2,294

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Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

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Amount, before adjustment, of tax expense (benefit) for unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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