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Financial Instruments (Tables) | 3 Months Ended
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Mar. 31, 2022
Investments, All Other Investments [Abstract] |
Schedule of Investments | The following table presents our financial instruments:
|  | March 31, 2022 |  | December 31, 2021
Cash and equivalents |  | $ | 243,262 |  |  | $ | 309,171 |
Held-to-maturity investments |  | — |  |  | 98,653 |
Available-for-sale investments |  | 79,315 |  |  | — |
Equity investments |  | 10,000 |  |  | 10,000 |
Total |  | $ | 332,577 |  |  | $ | 417,824 |
Schedule of Unrealized Loss on Investments | The following table presents the components of our available-for-sale investments:
| March 31, 2022 |  | December 31, 2021
Amortized cost | $ | 80,250 |  |  | $ | — |
Unrealized gains | 58 |  |  | — |
Unrealized losses | (993) |  |  | — |
Estimated fair value | $ | 79,315 |  |  | $ | — |
Schedule of Available-for-sale Activity | The following table presents the activity on our available-for-sale investments:
| Three Months Ended March 31, |  |
| 2022 |  | 2021 |  |  |  |
Proceeds from sales and maturities | $ | 22,672 |  |  | $ | 35,031 |  |  |  |  |
Realized gains on sales, net of tax | 41 |  |  | — |  |  |  |  |

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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27290-111563 + Details
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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References No definition available. + Details
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