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Related Party Transactions - Related Party Transactions (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Related Party Transaction [Line Items]
Equity method investments	$ 27,517	$ 14,194
Additional paid-in capital	652,857	536,509
Series A Preferred Stock
Related Party Transaction [Line Items]
Preferred stock	142,858	0
Series C Preferred Stock
Related Party Transaction [Line Items]
Preferred stock	160,808	0
Related party
Related Party Transaction [Line Items]
Equity method investments	20,300	0
Related party | Delayed share purchase agreement
Related Party Transaction [Line Items]
Additional paid-in capital	40	(1,178)
Related party | Allianz warrant | Warrants, net of issuance costs
Related Party Transaction [Line Items]
Additional paid-in capital	6,591	0
Related party | Constellation warrant | Warrants, net of issuance costs
Related Party Transaction [Line Items]
Additional paid-in capital	3,003	0
Related party | Series A Preferred Stock
Related Party Transaction [Line Items]
Preferred stock	142,858	0
Related party | Series C Preferred Stock
Related Party Transaction [Line Items]
Preferred stock	160,808	0
Other assets | Related party
Related Party Transaction [Line Items]
Related Party Receivables	3,500	6,700
Other assets | Equity method investee
Related Party Transaction [Line Items]
Related Party Receivables	3,089	5,948
Fees receivable, net | Related party | Fees receivable
Related Party Transaction [Line Items]
Related Party Receivables	116	247
Other Liabilities | Equity method investee
Related Party Transaction [Line Items]
Related Party Payables	(223)	(1,277)
Delayed share purchase agreement | Related party
Related Party Transaction [Line Items]
Related Party Payables	0	(1,818)
Accrued compensation and profit sharing | Related party
Related Party Transaction [Line Items]
Related Party Payables	0	(282)
Preferred stock tranche liability | Related party
Related Party Transaction [Line Items]
Related Party Payables	(3,940)	0
Due from Certain TWMH Members, TIG GP Members and TIG MGMT Members | Other assets | Related party
Related Party Transaction [Line Items]
Related Party Receivables	435	712
Due from TIG related fee arrangements | Fees receivable, net | Related party | Fees receivable
Related Party Transaction [Line Items]
Related Party Receivables	804	15,822
Due to Certain TWMH Members, TIG GP Members and TIG MGMT Members | Other Liabilities | Related party
Related Party Transaction [Line Items]
Related Party Payables	0	0
Due to Certain Non-Controlling Interest Holders in Connection with the Tax Receivable Agreements | TRA liability | Related party
Related Party Transaction [Line Items]
Related Party Payables	(28,765)	(17,607)
Due to Certain TWMH Members, TIG GP Members, TIG MGMT Members and Alvarium Shareholders in connection with the Business Combination Earn-out | Earn-out liabilities, at fair value | Related party
Related Party Transaction [Line Items]
Related Party Payables	(23,848)	(62,380)
AlTi Wealth Management (Switzerland) SA (“AWMS”) | Other Liabilities | Related party
Related Party Transaction [Line Items]
Deferred cash consideration	0	(7,135)
AlTi Wealth Management (Switzerland) SA (“AWMS”) | Earn-out liabilities, at fair value | Related party
Related Party Transaction [Line Items]
Related Party Payables	0	(1,064)
East End Advisors, LLC ("EEA") | Earn-out liabilities, at fair value | Related party
Related Party Transaction [Line Items]
Related Party Payables	(29,871)	0
Pointwise Partners Limited ("PW") | Other Liabilities | Related party
Related Party Transaction [Line Items]
Deferred cash consideration	(3,339)	0
Envoi, LLC (“Envoi”) | Earn-out liabilities, at fair value | Related party | Envoi earn-out consideration liability
Related Party Transaction [Line Items]
Related Party Payables	(9,600)	0
Envoi, LLC (“Envoi”) | Earn-out liabilities, at fair value | Related party | Envoi earn-out growth consideration liability
Related Party Transaction [Line Items]
Related Party Payables	$ (1,320)	$ 0

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