Short-Term Investment Reconciliation - (Details) - USD ($) $ in Thousands	12 Months Ended
Jan. 30, 2021	Feb. 01, 2020
Schedule Of Available For Sale Securities [Line Items]
Cost Basis	$ 125,746	$ 200,212
Estimated Fair Value	126,822	201,606
Gross Unrealized Gains	1,076	1,394
Gross Unrealized Losses	0	0
Debt Securiteis Issued by Various States of the United States and Political Subdivisions of the States
Schedule Of Available For Sale Securities [Line Items]
Cost Basis	40,701	73,116
Estimated Fair Value	41,123	73,424
Gross Unrealized Gains	422	308
Gross Unrealized Losses	0	0
Corporate Debt Securities
Schedule Of Available For Sale Securities [Line Items]
Cost Basis	85,045	127,096
Estimated Fair Value	85,699	128,182
Gross Unrealized Gains	654	1,086
Gross Unrealized Losses	$ 0	$ 0

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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