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Investments (Tables) | 9 Months Ended
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Sep. 30, 2025
Schedule of Investments [Abstract] |
Schedule of Investments | The Company's investments, excluding the assets of consolidated investment products ("CIP") discussed in Note 14, at September 30, 2025 and December 31, 2024 were as follows:
(in thousands) | September 30, 2025 |  | December 31, 2024
Investment securities - fair value | $ | 110,561 |  |  | $ | 83,771 |
Equity method investments (1) | 19,345 |  |  | 20,286 |
Nonqualified retirement plan assets | 19,606 |  |  | 15,159 |
Total investments | $ | 149,512 |  |  | $ | 119,216 |
(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, 2025 |  | December 31, 2024
(in thousands) | Cost |  | Fair Value |  | Cost |  | Fair Value
Investment Securities - fair value |  |  |  |  |  |  |
Sponsored funds | $ | 53,466 |  |  | $ | 56,383 |  |  | $ | 63,220 |  |  | $ | 63,296 |
Equity securities | 19,020 |  |  | 22,124 |  |  | 17,406 |  |  | 19,019 |
Debt securities | 32,059 |  |  | 32,054 |  |  | 1,457 |  |  | 1,456 |
Total investment securities - fair value | $ | 104,545 |  |  | $ | 110,561 |  |  | $ | 82,083 |  |  | $ | 83,771 |

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- Definition Tabular disclosure of investment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/320/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Topic 321 -Publisher FASB -URI https://asc.fasb.org/321/tableOfContent Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Topic 325 -Publisher FASB -URI https://asc.fasb.org/325/tableOfContent + Details
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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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6B + Details
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