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Short-Term Investment Reconciliation - (Details) - USD ($) $ in Thousands | 12 Months Ended
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Feb. 02, 2019 | Feb. 03, 2018
Debt Securiteis Issued by Various States of the United States and Political Subdivisions of the States |  |
ScheduleOfAvailableForSaleSecuritiesLineItems |  |
Cost Basis | $ 71,953 | $ 96,701
Estimated Fair Value | 71,582 | 95,983
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (371) | (718)
Corporate Debt Securities |  |
ScheduleOfAvailableForSaleSecuritiesLineItems |  |
Cost Basis | 114,372 | 23,079
Estimated Fair Value | 114,225 | 22,853
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | $ (147) | $ (226)

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