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Investment Securities and Certificates of Deposit (Tables) | 12 Months Ended
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Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract] |
Unrealized Gain (Loss) on Investments | The Company's Investment Securities and Certificates of Deposit as of December 31, 2022 and 2021 were as follows:
| December 31, 2022 |  | December 31, 2021
| Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value |  | Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Debt Securities | $ | 802,652 |  |  | $ | 4,483 |  |  | $ | — |  |  | $ | 807,135 |  |  | $ | 706,826 |  |  | $ | 37 |  |  | $ | 16 |  |  | $ | 706,847 |
Equity Securities | 558 |  |  | — |  |  | 223 |  |  | 335 |  |  | 666 |  |  | 193 |  |  | — |  |  | 859 |
Debt Securities Carried by EGL | 363,824 |  |  | 1,814 |  |  | — |  |  | 365,638 |  |  | 784,813 |  |  | 43 |  |  | 14 |  |  | 784,842 |
Investment Funds | 144,343 |  |  | 531 |  |  | 8,156 |  |  | 136,718 |  |  | 111,682 |  |  | 39,191 |  |  | — |  |  | 150,873 |
Total Investment Securities (carried at fair value) | $ | 1,311,377 |  |  | $ | 6,828 |  |  | $ | 8,379 |  |  | $ | 1,309,826 |  |  | $ | 1,603,987 |  |  | $ | 39,464 |  |  | $ | 30 |  |  | $ | 1,643,421 |
Certificates of Deposit (carried at contract value) |  | 122,890 |  |  |  |  |  |  |  |  | 141,218 |
Total Investment Securities and Certificates of Deposit |  | $ | 1,432,716 |  |  |  |  |  |  |  |  | $ | 1,784,639 |
Investments Classified by Contractual Maturity Date | Scheduled maturities of the Company's available-for-sale debt securities as of December 31, 2022 and 2021 were as follows:
| December 31, 2022 |  | December 31, 2021
| Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
Due within one year | $ | 800,710 |  |  | $ | 805,190 |  |  | $ | 706,826 |  |  | $ | 706,847 |
Due after one year through five years | 1,942 |  |  | 1,945 |  |  | — |  |  | — |
Total | $ | 802,652 |  |  | $ | 807,135 |  |  | $ | 706,826 |  |  | $ | 706,847 |

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