Quarterly report pursuant to Section 13 or 15(d)

Equity - Class A Common Stock (Detail)

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Equity - Class A Common Stock (Detail) - Class A Common Stock - shares
 1 Months Ended 3 Months Ended
Sep. 30, 2024
Aug. 31, 2024
Jun. 30, 2024
May 31, 2024
Mar. 31, 2024
Mar. 31, 2024
Dec. 31, 2023
Class Of Stock [Line Items]              
Common stock, shares outstanding 9,503,410           9,478,997
Issuance of Class A common stock upon exchange of Class B units to Class A common stock 21,405 15,459 28,737 25,002 3,025 3,025  
Purchase of shares of Class A common stock of Silvercrest Asset Management Group Inc., Shares (60,600) (22,077)          
Common stock exchange date 2024-09 2024-08 2024-06 2024-05 2024-03    
Purchase of shares of Class A common stock of Silvercrest Asset Management Group Inc., Transaction date 2024-09 2024-08          
Restricted Stock              
Class Of Stock [Line Items]              
Issuance of common stock upon vesting of restricted stock units   1,827   11,635      
Common stock exchange date   2024-08   2024-05