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v3.21.2

Investments (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2021 | Dec. 31, 2020
Investments |  |  |
Investments - Trading | $ 3,006 | $ 3,006 | $ 10,840
Available-for-sale investments |  |  |
Adjusted Cost | 41,651 | 41,651 |
Gross Unrealized Gains |  | 41 |
Gross Unrealized (Losses) |  | (283) |
Estimated Fair Value | 41,409 | 41,409 |
Unrealized gains on available-for-sale securities, net of tax | (65) | (185) |
Credit losses for our available-for-sale debt securities | 0 | 0 |
Corporate bonds |  |  |
Available-for-sale investments |  |  |
Adjusted Cost | 34,344 | 34,344 |
Gross Unrealized Gains |  | 41 |
Gross Unrealized (Losses) |  | (281) |
Estimated Fair Value | 34,104 | 34,104 |
Commercial paper |  |  |
Available-for-sale investments |  |  |
Adjusted Cost | 3,997 | 3,997 |
Estimated Fair Value | 3,997 | 3,997 |
Municipal securities |  |  |
Available-for-sale investments |  |  |
Adjusted Cost | 2,108 | 2,108 |
Estimated Fair Value | 2,108 | 2,108 |
Asset-backed securities |  |  |
Available-for-sale investments |  |  |
Adjusted Cost | 1,202 | 1,202 |
Gross Unrealized (Losses) |  | (2) |
Estimated Fair Value | $ 1,200 | $ 1,200 |

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