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Consolidation - Assets Related to Consolidated Sponsored Investment Products, Unobservable Input Reconciliation (Details) - Consolidated Investment Products - Debt investments - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at beginning of period $ 3,157 $ 54,182
Purchases 4,118 10,708
Sales (18,076) (41,362)
Amortization 107 98
Change in unrealized gains (losses), net (958) 2,203
Realized gains (loss), net (585) (301)
Transfers to Level 2 (87,458) (85,551)
Transfers from Level 2 143,276 63,180
Balance at end of period $ 43,581 $ 3,157