Investments - Gross Realized Gains and Losses on Sales of Available-for-Sale Securities (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Feb. 01, 2020 |
Feb. 02, 2019 |
Feb. 03, 2018 |
|
| Investments, Debt and Equity Securities [Abstract] | |||
| Gross realized gains | $ 14 | $ 371 | $ 186 |
| Gross realized losses | (6) | (3,437) | (2,963) |
| Total net realized gains (losses) | $ 8 | $ (3,066) | $ (2,777) |