XML 43 R29.htm IDEA: XBRL DOCUMENT
v3.21.1

Investment Securities and Certificates of Deposit (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract] |
Unrealized Gain (Loss) on Investments | The Company's Investment Securities and Certificates of Deposit as of March 31, 2021 and December 31, 2020 were as follows:
| March 31, 2021 |  | December 31, 2020
| Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value |  | Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Debt Securities | $ | 147,995 |  |  | $ | 1 |  |  | $ | — |  |  | $ | 147,996 |  |  | $ | 402,824 |  |  | $ | 39 |  |  | $ | — |  |  | $ | 402,863 |
Equity Securities | 2,621 |  |  | 2,055 |  |  | — |  |  | 4,676 |  |  | 666 |  |  | — |  |  | 73 |  |  | 593 |
Debt Securities Carried by Broker-Dealers | 519,969 |  |  | 19 |  |  | 1 |  |  | 519,987 |  |  | 550,002 |  |  | 27 |  |  | 3 |  |  | 550,026 |
Investment Funds | 109,268 |  |  | 17,313 |  |  | — |  |  | 126,581 |  |  | 87,612 |  |  | 19,742 |  |  | — |  |  | 107,354 |
Total Investment Securities (carried at fair value) | $ | 779,853 |  |  | $ | 19,388 |  |  | $ | 1 |  |  | $ | 799,240 |  |  | $ | 1,041,104 |  |  | $ | 19,808 |  |  | $ | 76 |  |  | $ | 1,060,836 |
Certificates of Deposit (carried at contract value) |  | 73,877 |  |  |  |  |  |  |  |  | — |
Total Investment Securities and Certificates of Deposit |  | $ | 873,117 |  |  |  |  |  |  |  |  | $ | 1,060,836 |
Investments Classified by Contractual Maturity Date | Scheduled maturities of the Company's available-for-sale debt securities as of March 31, 2021 and December 31, 2020 were as follows:
| March 31, 2021 |  | December 31, 2020
| Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
Due within one year | $ | 147,995 |  |  | $ | 147,996 |  |  | $ | 402,824 |  |  | $ | 402,863 |
Total | $ | 147,995 |  |  | $ | 147,996 |  |  | $ | 402,824 |  |  | $ | 402,863 |

X
- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
Name: | us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of unrealized gains and losses on investments. + References No definition available. + Details
Name: | us-gaap_UnrealizedGainLossOnInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration