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Consolidation - Assets Related to Consolidated Sponsored Investment Products, Unobservable Input Reconciliation (Details) - Debt investments - Consolidated Investment Products - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023
Assets |  |
Balance at beginning of period | $ 37,062 | $ 43,581
Realized and unrealized gain (loss) on investments, net | (324) | 111
Purchases | 0 | 4
Sales | (14,625) | (7,195)
Transfers to Level 2 | (13,468) | (35,747)
Transfers from Level 2 | 39,148 | 9,904
Balance at end of period | $ 47,793 | $ 10,658

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