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Investments (Tables) | 9 Months Ended
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Sep. 30, 2021
Schedule of Investments [Abstract] |
Summary of Investments | The Company's investments, excluding the assets of consolidated investment products ("CIP") discussed in Note 16, at September 30, 2021 and December 31, 2020 were as follows:
(in thousands) | September 30, 2021 |  | December 31, 2020
Investment securities - fair value | $ | 78,143 |  |  | $ | 39,990 |
Equity method investments (1) | 12,914 |  |  | 12,676 |
Nonqualified retirement plan assets | 12,378 |  |  | 10,612 |
Other investments | 2,197 |  |  | 1,666 |
Total investments | $ | 105,632 |  |  | $ | 64,944 |
(1) The Company's equity method investments are valued on a three-month lag based upon the availability of financial information.
Schedule of Marketable Securities | The composition of the Company’s investment securities - fair value was as follows:
| September 30, 2021 |  | December 31, 2020
(in thousands) | Cost |  | Fair Value |  | Cost |  | Fair Value
Investment Securities - fair value |  |  |  |  |  |  |
Sponsored funds | $ | 59,342 |  |  | $ | 64,691 |  |  | $ | 22,378 |  |  | $ | 25,909 |
Equity securities | 10,362 |  |  | 13,446 |  |  | 9,614 |  |  | 14,078 |
Debt securities | 7 |  |  | 6 |  |  | 7 |  |  | 3 |
Total investment securities - fair value | $ | 69,711 |  |  | $ | 78,143 |  |  | $ | 31,999 |  |  | $ | 39,990 |

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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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