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v3.23.3

Marketable Securities (Narrative) (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Schedule of Investments [Line Items] |  |  |  |  |
Cash equivalents at fair value | $ 588,227,000 |  | $ 588,227,000 |  | $ 450,240,000
Net unrealized loss | 11,111,000 |  | 11,111,000 |  | 9,294,000
Net unrealized gains (losses) income tax expense (benefit) | (3,319,000) |  | (3,319,000) |  | (2,777,000)
Available-for-sale securities, gross realized gains |  |  | 0 | $ 0 |
Mutual funds and equities, gross realized gains |  |  | 63,000 | 226,000 |
Mutual funds and equities, gross realized loss |  |  | 101,000 | 714,000 |
Other long-term investments | 44,645,000 |  | 44,645,000 |  | 104,673,000
Securities owned | 32,748,000 |  | 32,748,000 |  | 32,148,000
Available-for-sale debt securities |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Available-for-sale securities, gross realized losses |  |  | 167,000 | 521,000 |
Investment Funds Sponsored by LSV |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Other long-term investments | 6,838,000 |  | 6,838,000 |  | $ 6,366,000
Unrealized gains (losses) on investments | $ 66,000 | $ (380,000) | $ 472,000 | $ (1,296,000) |

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