Commitments and Contingencies (Details) $ / shares in Units, $ in Thousands								12 Months Ended		18 Months Ended
	Apr. 30, 2025 USD ($)	Mar. 13, 2025 USD ($)	Dec. 19, 2024 USD ($)	Jul. 01, 2024 USD ($)	May 09, 2024 USD ($)	Apr. 03, 2024 USD ($)	Jan. 03, 2023 USD ($)	Dec. 31, 2025 USD ($) $ / shares shares	Dec. 31, 2024 USD ($) shares	Dec. 31, 2023 USD ($)	Mar. 31, 2025 USD ($)	May 08, 2024	Apr. 12, 2024
Other Commitments [Line Items]
TRA liability								$ 25,724	$ 28,765
TRA liability								$ 8,785	9,378
Conversion ratio								1
Earn-out liabilities, at fair value								$ 57,411	64,639
Outstanding letters of credit								3,400	3,400
Percentage of losses sought													100.00%
Percentage decline in real estate investment portfolio										50.00%
Provision for redress liability								$ 3,600
Settled Litigation
Other Commitments [Line Items]
Litigation settlement		$ 5,100
Certain Former Tolleson Employees
Other Commitments [Line Items]
Employment agreement, term of client and employee non-solicit and lost client fee clause (in years)								1 year
Letter of Credit
Other Commitments [Line Items]
Collateral amount as percentage of the amount of each instrument issued			102.00%
Threshold of aggregate outstanding face amount of all issued instruments			$ 5,000
Expiration date, from termination date (in years)			1 year
Commitment fee (in percent)			0.30%
Alvarium, TWMH And TIG
Other Commitments [Line Items]
Earn-out liabilities, at fair value								$ 15,300	23,800
Total purchase consideration transferred							$ 1,071,100
Voting interest acquired (in percent)							100.00%
Alvarium, TWMH And TIG \| Earn-out liability
Other Commitments [Line Items]
Fair value of the business combination earn-out liability								15,268	23,848	$ 62,380
East End Advisors, LLC ("EEA")
Other Commitments [Line Items]
Earn-out liabilities, at fair value						$ 23,300		25,300	29,900
Total purchase consideration transferred						93,114
Payment of assumed liabilities						$ 793
East End Advisors, LLC ("EEA") \| Earn-out liability
Other Commitments [Line Items]
Fair value of the business combination earn-out liability								25,259	29,871	$ 0
Pointwise Partners Limited ("PW")
Other Commitments [Line Items]
Total purchase consideration transferred					$ 7,954
Voting interest acquired (in percent)					50.00%
Equity interest (in percent)												50.00%
Equity interest, including subsequent acquisition (in percent)					100.00%
Payment of assumed liabilities					$ 3,300
Deferred consideration					$ 3,328			0	3,339
Deferred cash consideration paid											$ 3,400
Envoi, LLC (“Envoi”)
Other Commitments [Line Items]
Earn-out liabilities, at fair value				$ 9,000
Total purchase consideration transferred				$ 34,258
Envoi, LLC (“Envoi”) \| Earn-out consideration liability
Other Commitments [Line Items]
Earn-out liabilities, at fair value								8,200	9,600
Envoi, LLC (“Envoi”) \| Earn-out growth consideration liability
Other Commitments [Line Items]
Earn-out liabilities, at fair value								1,600	1,300
Kontora Family Office GmbH ("Kontora")
Other Commitments [Line Items]
Earn-out liabilities, at fair value	$ 5,743
Total purchase consideration transferred	$ 15,696
Kontora Family Office GmbH ("Kontora") \| Earn-out liability
Other Commitments [Line Items]
Fair value of the business combination earn-out liability								$ 7,044	$ 0
Class A Common Stock
Other Commitments [Line Items]
Conversion ratio								1
Converted shares (in shares) \| shares								10,844,400
Share price (in dollars per share) \| $ / shares								$ 5.68
Class A Common Stock \| Sponsor and selling shareholders of TWMH, TIG, and Alvarium \| Alvarium, TWMH And TIG \| Earnout shares
Other Commitments [Line Items]
Number of earn-out securities (in shares) \| shares								3,300,000
Class A Common Stock \| Sponsor and selling shareholders of TWMH, TIG, and Alvarium \| Alvarium, TWMH And TIG \| Earnout shares, tranche one
Other Commitments [Line Items]
Volume weighted average price (in dollars per share) \| $ / shares								$ 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%
Class A Common Stock \| Sponsor and selling shareholders of TWMH, TIG, and Alvarium \| Alvarium, TWMH And TIG \| Earnout shares, tranche two
Other Commitments [Line Items]
Volume weighted average price (in dollars per share) \| $ / shares								$ 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%
Class B Common Stock
Other Commitments [Line Items]
Converted shares (in shares) \| shares								1,950,315	7,080,837
Class B Common Stock \| Sponsor and selling shareholders of TWMH, TIG, and Alvarium \| Alvarium, TWMH And TIG \| Earnout shares
Other Commitments [Line Items]
Number of earn-out securities (in shares) \| shares								7,100,000
Class B units \| Sponsor and selling shareholders of TWMH, TIG, and Alvarium \| Alvarium, TWMH And TIG \| Earnout shares
Other Commitments [Line Items]
Number of earn-out securities (in shares) \| shares								7,100,000

AlTi Global, Inc. 10-K