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Consolidation - Assets Related to Consolidated Sponsored Investment Products, Unobservable Input Reconciliation (Details) - Debt investments - Consolidated Investment Products - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at beginning of period $ 3,157 $ 54,182
Realized gains (losses), net (596) (209)
Change in unrealized gains (losses), net (425) 1,580
Purchases 1,930 8,267
Amortization 9 78
Sales (12,142) (31,501)
Transfers to Level 2 (53,746) (54,445)
Transfers from Level 2 107,622 68,635
Balance at end of period $ 45,809 $ 46,587