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Summary of Significant Accounting Policies (Fair Value of Financial Instruments) (Details) - USD ($) $ in Thousands | Feb. 03, 2024 | Jan. 28, 2023
--- | --- | ---
Corporate Bond Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Significant Accounting Policies [Line Items] |  |
Amortized Cost | $ 280,067 | $ 66,845
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 154 | 292
Fair Market Value | 279,913 | 66,553
Municipal Bonds [Member] |  |
Significant Accounting Policies [Line Items] |  |
Amortized Cost | 280,339 | 66,845
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 154 | 292
Fair Market Value | 280,185 | $ 66,553
Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Significant Accounting Policies [Line Items] |  |
Amortized Cost | 272 |
Gross Unrealized Gains | 0 |
Gross Unrealized Losses | 0 |
Fair Market Value | 272 |
Other Long-term Investments [Member] |  |
Significant Accounting Policies [Line Items] |  |
Amortized Cost | 7,791 |
Gross Unrealized Gains | 0 |
Gross Unrealized Losses | 8 |
Fair Market Value | 7,783 |
Other Long-term Investments [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Significant Accounting Policies [Line Items] |  |
Amortized Cost | 7,791 |
Gross Unrealized Gains | 0 |
Gross Unrealized Losses | 8 |
Corporate Bond Securities - Long Term [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Significant Accounting Policies [Line Items] |  |
Fair Market Value | $ 7,783 |

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