XML 25 R1.htm IDEA: XBRL DOCUMENT v3.24.0.1
Cover - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Feb. 29, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-38980    
Entity Registrant Name ASSETMARK FINANCIAL HOLDINGS, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 30-0774039    
Entity Address, Address Line One 1655 Grant Street    
Entity Address, Address Line Two 10th Floor    
Entity Address, City or Town Concord    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 94520    
City Area Code 925    
Local Phone Number 521-2200    
Title of 12(b) Security Common stock, par value $0.001 per share    
Trading Symbol AMK    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] true    
Document Financial Statement Restatement Recovery Analysis [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 652.8
Entity Common Stock, Shares Outstanding   74,376,670  
Documents Incorporated by Reference
Documents Incorporated by Reference: Certain information required in response to Item 5 of Part II of Form 10-K and Part III of Form 10-K is hereby incorporated by reference to portions of the Registrant’s Proxy Statement for the Annual Meeting of Stockholders to be held in 2024. The Proxy Statement will be filed by the Registrant with the Securities and Exchange Commission no later than 120 days after the end of the Registrant’s fiscal year ended December 31, 2023.
    
Entity Central Index Key 0001591587    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Amendment Flag false