Net Capital and Minimum Capital Requirements - Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
AssetMark Trust Company
Net Capital And Minimum Capital Requirements [Line Items]
Liquid capital	$ 13,875	$ 11,500
AssetMark Brokerage, LLC
Net Capital And Minimum Capital Requirements [Line Items]
Net capital	$ 178	$ 16

Amount of net capital of broker-dealer.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Rule 15c3-1
-Number 240
-Section 15c3-1
-Publisher SEC