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Goodwill and Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Goodwill [Roll Forward] |  |
Beginning balance | $ 115,599 | $ 117,232
Measurement period adjustments |  | (1,588)
Acquisitions | 21,452 |
Foreign currency translation adjustments | 282 | (45)
Ending balance | 137,333 | 115,599
Institutional Investors |  |
Goodwill [Roll Forward] |  |
Beginning balance | 47,108 | 48,911
Measurement period adjustments |  | (1,803)
Acquisitions | 14,492 |
Foreign currency translation adjustments | 284 | 0
Ending balance | 61,884 | 47,108
Investment Managers |  |
Goodwill [Roll Forward] |  |
Beginning balance | 56,992 | 56,822
Measurement period adjustments |  | 215
Acquisitions | 0 |
Foreign currency translation adjustments | (2) | (45)
Ending balance | 56,990 | 56,992
Investments in New Businesses |  |
Goodwill [Roll Forward] |  |
Beginning balance | 11,499 | 11,499
Measurement period adjustments |  |
Acquisitions | 6,960 |
Foreign currency translation adjustments | 0 | 0
Ending balance | $ 18,459 | $ 11,499

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