Commitments and Contingencies - Narrative (Details) $ / shares in Units, $ in Thousands							18 Months Ended
	May 14, 2024 $ / shares shares	Apr. 03, 2024 USD ($)	Mar. 11, 2024 $ / shares shares	Aug. 31, 2023 $ / shares shares	Aug. 02, 2023 USD ($)	Jan. 03, 2023 USD ($)	Dec. 31, 2023 USD ($)	Jun. 30, 2024 USD ($)	Apr. 12, 2024	Aug. 01, 2023	Dec. 31, 2022
Other Commitments [Line Items]
TRA liability (includes $6,911 and $13,233 at fair value, respectively)							$ 17,607	$ 24,911
TRA liability, fair value							13,233	$ 6,911
Conversion ratio								1
Earn-out liability, at fair value							$ 63,444	$ 49,124
Percentage of losses sought									100.00%
Percentage decline in real estate investment portfolio							50.00%
Alvarium, TWMH And TIG
Other Commitments [Line Items]
Earn-out liability, at fair value							$ 62,400	24,000
Total purchase consideration transferred						$ 1,071,116
AlTi Wealth Management (Switzerland) SA (“AWMS”)
Other Commitments [Line Items]
Earn-out liability, at fair value							1,100	1,100
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
East End Advisors, LLC ("EEA")
Other Commitments [Line Items]
Earn-out liability, at fair value		$ 23,300						24,000
Total purchase consideration transferred		$ 93,114
Class A Common Stock
Other Commitments [Line Items]
Conversion ratio	1		1	1		1
Converted shares (in shares) | shares	286,242		4,954,518	1,813,248
Share price (in dollars per share) | $ / shares	$ 4.69		$ 6.61	$ 7.31
Level 3
Other Commitments [Line Items]
TRA liability, fair value							13,233	6,911
Level 3 | Alvarium, TWMH And TIG
Other Commitments [Line Items]
Earn-out liability, at fair value							62,380	24,046
Level 3 | AlTi Wealth Management (Switzerland) SA (“AWMS”)
Other Commitments [Line Items]
Earn-out liability, at fair value							$ 1,064	1,100
Level 3 | East End Advisors, LLC ("EEA")
Other Commitments [Line Items]
Earn-out liability, at fair value								$ 23,978