Related Party Transactions - Schedule of Related Party Transactions (Details) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Related Party Transaction [Line Items]
Shareholders' Equity	$ 549,998,000	$ 536,509,000
Related party
Related Party Transaction [Line Items]
Shareholders' Equity	40,000	(1,178,000)
Pointwise Partners Limited ("PW")
Related Party Transaction [Line Items]
Deferred cash consideration	(3,400,000)
Other assets | Related party
Related Party Transaction [Line Items]
Related Party Receivables	4,600,000	6,700,000
Other assets | Equity method investee
Related Party Transaction [Line Items]
Related Party Receivables	4,107,000	5,948,000
Other assets | Due from Certain TWMH Members, TIG GP Members and TIG MGMT Members | Related party
Related Party Transaction [Line Items]
Related Party Receivables	541,000	712,000
Fees receivable, net | Related party | Fees receivable
Related Party Transaction [Line Items]
Related Party Receivables	8,900	247,000
Fees receivable, net | Due from TIG related fee arrangements | Related party | Fees receivable
Related Party Transaction [Line Items]
Related Party Receivables	822,000	15,822,000
Other Liabilities | Equity method investee
Related Party Transaction [Line Items]
Related Party Payables	(232,000)	(1,277,000)
Other Liabilities | Due to Certain TWMH Members, TIG GP Members and TIG MGMT Members | Related party
Related Party Transaction [Line Items]
Related Party Payables	(517,000)	0
Other Liabilities | AlTi Wealth Management (Switzerland) SA (“AWMS”) | Related party
Related Party Transaction [Line Items]
Deferred cash consideration	(6,857,000)	(7,135,000)
Other Liabilities | Pointwise Partners Limited ("PW")
Related Party Transaction [Line Items]
Deferred cash consideration	(3,365,000)	0
TRA liability | Due to Certain Non-Controlling Interest Holders in Connection with the Tax Receivable Agreements | Related party
Related Party Transaction [Line Items]
Related Party Payables	(24,911,000)	(17,607,000)
Delayed share purchase agreement | Related party
Related Party Transaction [Line Items]
Related Party Payables	0	(1,818,000)
Accrued compensation and profit sharing | Related party
Related Party Transaction [Line Items]
Related Party Payables	0	(282,000)
Earn-out liability, at fair value | Due to Certain TWMH Members, TIG GP Members, TIG MGMT Members and Alvarium Shareholders in connection with the Business Combination Earn-out | Related party
Related Party Transaction [Line Items]
Related Party Payables	(24,046,000)	(62,380,000)
Earn-out liability, at fair value | AlTi Wealth Management (Switzerland) SA (“AWMS”) | Related party
Related Party Transaction [Line Items]
Related Party Payables	(1,100,000)	(1,064,000)
Earn-out liability, at fair value | East End Advisors, LLC ("EEA") | Related party
Related Party Transaction [Line Items]
Related Party Payables	$ (23,978,000)	$ 0