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Investment Securities and Certificates of Deposit (Tables) | 6 Months Ended
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Jun. 30, 2020
Investments, Debt and Equity Securities [Abstract] |
Unrealized Gain (Loss) on Investments | The Company's Investment Securities and Certificates of Deposit as of June 30, 2020 and December 31, 2019 were as follows:
| June 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 | $ | 991 |  |  | $ | 8 |  |  | $ | — |  |  | $ | 999 |  |  | $ | 114,204 |  |  | $ | 591 |  |  | $ | 11 |  |  | $ | 114,784 |
Equity Securities | 666 |  |  | — |  |  | 414 |  |  | 252 |  |  | 666 |  |  | — |  |  | 168 |  |  | 498 |
Debt Securities Carried by Broker-Dealers | 4,231 |  |  | 32 |  |  | — |  |  | 4,263 |  |  | 225,727 |  |  | 1,648 |  |  | 20 |  |  | 227,355 |
Investment Funds | 92,964 |  |  | 3,145 |  |  | 1,896 |  |  | 94,213 |  |  | 58,704 |  |  | 7,809 |  |  | — |  |  | 66,513 |
Total Investment Securities (carried at fair value) | $ | 98,852 |  |  | $ | 3,185 |  |  | $ | 2,310 |  |  | $ | 99,727 |  |  | $ | 399,301 |  |  | $ | 10,048 |  |  | $ | 199 |  |  | $ | 409,150 |
Certificates of Deposit (carried at contract value) |  | — |  |  |  |  |  |  |  |  | 214,796 |
Total Investment Securities and Certificates of Deposit |  | $ | 99,727 |  |  |  |  |  |  |  |  | $ | 623,946 |
Investments Classified by Contractual Maturity Date | Scheduled maturities of the Company's available-for-sale debt securities as of June 30, 2020 and December 31, 2019 were as follows:
| June 30, 2020 |  | December 31, 2019
| Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
Due within one year | $ | 991 |  |  | $ | 999 |  |  | $ | 108,662 |  |  | $ | 109,217 |
Due after one year through five years | — |  |  | — |  |  | 5,542 |  |  | 5,567 |
Total | $ | 991 |  |  | $ | 999 |  |  | $ | 114,204 |  |  | $ | 114,784 |

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