Summary of Significant Accounting Policies - Business Combination, AWMS Earn-out Liability, East End Advisors Earn-out Liability (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions				6 Months Ended
	Apr. 03, 2024	Aug. 02, 2023	Jan. 03, 2023	Jun. 30, 2024	Dec. 31, 2023	Aug. 01, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Earn-out liability, at fair value				$ 49,124	$ 63,444
Alvarium, TWMH And TIG
Business Acquisition [Line Items]
Total purchase consideration transferred			$ 1,071,116
Earn-out liability, at fair value				24,000	62,400
AlTi Wealth Management (Switzerland) SA (“AWMS”)
Business Acquisition [Line Items]
Voting interest acquired (in percent)		70.00%
Equity interest (in percent)						30.00%	30.00%
Equity interest, including subsequent acquisition (in percent)		100.00%
Total purchase consideration transferred		$ 16,754
Earn-out liability, at fair value				1,100	$ 1,100
East End Advisors, LLC ("EEA")
Business Acquisition [Line Items]
Total purchase consideration transferred	$ 93,114
Earn-out liability, at fair value	$ 23,300			$ 24,000
Sponsor and selling shareholders of TWMH, TIG, and Alvarium | Alvarium, TWMH And TIG | Earnout shares | Class A Common Stock
Business Acquisition [Line Items]
Number of earn-out securities (in shares)				3.3
Sponsor and selling shareholders of TWMH, TIG, and Alvarium | Alvarium, TWMH And TIG | Earnout shares | Class B Common Stock
Business Acquisition [Line Items]
Number of earn-out securities (in shares)				7.1
Sponsor and selling shareholders of TWMH, TIG, and Alvarium | Alvarium, TWMH And TIG | Earnout shares | Class B units
Business Acquisition [Line Items]
Number of earn-out securities (in shares)				7.1
Sponsor and selling shareholders of TWMH, TIG, and Alvarium | Alvarium, TWMH And TIG | Earnout shares, tranche one | Class A Common Stock
Business Acquisition [Line Items]
Volume weighted average price (in dollars per share)				$ 12.50
Volume weighted average price, number of trading days				20 days
Volume weighted average price, number of consecutive trading days				30 days
Volume weighted average price, term within closing of transaction (in years)				5 years
Earnout securities to be issued, issued (in percent)				50.00%
Sponsor and selling shareholders of TWMH, TIG, and Alvarium | Alvarium, TWMH And TIG | Earnout shares, tranche two | Class A Common Stock
Business Acquisition [Line Items]
Volume weighted average price (in dollars per share)				$ 15.00
Volume weighted average price, number of trading days				20 days
Volume weighted average price, number of consecutive trading days				30 days
Volume weighted average price, term within closing of transaction (in years)				5 years
Earnout securities to be issued, issued (in percent)				50.00%