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Investment Securities and Certificates of Deposit (Tables) | 9 Months Ended
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Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract] |
Unrealized Gain (Loss) on Investments | The Company's Investment Securities and Certificates of Deposit as of September 30, 2020 and December 31, 2019 were as follows:
| September 30, 2020 |  | December 31, 2019
| Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value |  | Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Debt Securities | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 114,204 |  |  | $ | 591 |  |  | $ | 11 |  |  | $ | 114,784 |
Equity Securities | 666 |  |  | — |  |  | 322 |  |  | 344 |  |  | 666 |  |  | — |  |  | 168 |  |  | 498 |
Debt Securities Carried by Broker-Dealers | 4,806 |  |  | — |  |  | 55 |  |  | 4,751 |  |  | 225,727 |  |  | 1,648 |  |  | 20 |  |  | 227,355 |
Investment Funds | 87,794 |  |  | 7,957 |  |  | — |  |  | 95,751 |  |  | 58,704 |  |  | 7,809 |  |  | — |  |  | 66,513 |
Total Investment Securities (carried at fair value) | $ | 93,266 |  |  | $ | 7,957 |  |  | $ | 377 |  |  | $ | 100,846 |  |  | $ | 399,301 |  |  | $ | 10,048 |  |  | $ | 199 |  |  | $ | 409,150 |
Certificates of Deposit (carried at contract value) |  | — |  |  |  |  |  |  |  |  | 214,796 |
Total Investment Securities and Certificates of Deposit |  | $ | 100,846 |  |  |  |  |  |  |  |  | $ | 623,946 |
Investments Classified by Contractual Maturity Date | Scheduled maturities of the Company's available-for-sale debt securities as of September 30, 2020 and December 31, 2019 were as follows:
| September 30, 2020 |  | December 31, 2019
| Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
Due within one year | $ | — |  |  | $ | — |  |  | $ | 108,662 |  |  | $ | 109,217 |
Due after one year through five years | — |  |  | — |  |  | 5,542 |  |  | 5,567 |
Total | $ | — |  |  | $ | — |  |  | $ | 114,204 |  |  | $ | 114,784 |

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