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Fair Value Disclosures - Changes In Fair Value of Level 3 Measurements (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance $ 76,677 $ 106,280
Issuances 36,848 2,721
Settlements 0 0
Net (gains) losses (34,465) (30,494)
Transfers out of Level 3 (1,103) (1,830)
Ending balance 77,957 76,677
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 164,077 146,130
Realized and Unrealized Gains (Losses) $ (17,055) $ 2,580
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Other loss attributed to non-controlling interests in subsidiaries
Purchases $ 1,935 $ 15,367
Ending balance 148,957 164,077
TRA liability    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 13,233 13,000
Issuances 0 0
Settlements 0 0
Net (gains) losses (3,855) 233
Transfers out of Level 3 0 0
Ending balance 9,378 13,233
Earn-out liability | Alvarium, TWMH And TIG    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 62,380 91,761
Issuances 0 0
Settlements 0 0
Net (gains) losses (38,532) (29,381)
Transfers out of Level 3 0 0
Ending balance 23,848 62,380
Earn-out liability | AlTi Wealth Management (Switzerland) SA (“AWMS”)    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 1,064 0
Issuances 0 2,721
Settlements 0 0
Net (gains) losses 39 (1,657)
Transfers out of Level 3 (1,103) 0
Ending balance 0 1,064
Earn-out liability | East End Advisors, LLC ("EEA")    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 0  
Issuances 23,308  
Settlements 0  
Net (gains) losses 6,563  
Transfers out of Level 3 0  
Ending balance 29,871 0
Envoi earn-out consideration liability | Envoi, LLC (“Envoi”)    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 0  
Issuances 7,980  
Settlements 0  
Net (gains) losses 1,620  
Transfers out of Level 3 0  
Ending balance 9,600 0
Envoi earn-out growth consideration liability | Envoi, LLC (“Envoi”)    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 0  
Issuances 1,020  
Settlements 0  
Net (gains) losses 300  
Transfers out of Level 3 0  
Ending balance 1,320 0
Preferred stock tranche liability    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 0  
Issuances 4,540  
Settlements 0  
Net (gains) losses (600)  
Transfers out of Level 3 0  
Ending balance 3,940 0
Earn-in consideration payable    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 0 1,519
Issuances   0
Settlements   0
Net (gains) losses   311
Transfers out of Level 3   (1,830)
Ending balance   0
Investments – External Strategic Managers    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 164,077 146,130
Realized and Unrealized Gains (Losses) (16,509) 2,580
Purchases 0 15,367
Ending balance 147,568 164,077
Contingent Consideration Receivable    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 0  
Realized and Unrealized Gains (Losses) (546)  
Purchases 1,935  
Ending balance $ 1,389 $ 0