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 9 Months Ended 12 Months Ended
Aug. 31, 2023
Jun. 30, 2023
May 31, 2023
Mar. 31, 2023
Sep. 30, 2023
Dec. 31, 2022
Class Of Stock [Line Items]            
Common stock, shares outstanding         9,342,259 9,559,587
Issuance of Class A common stock upon conversion of Class B units to Class A common stock 6,636 21,243 44,669 1,555    
Purchase of shares of Class A common stock of Silvercrest Asset Management Group Inc., Shares (37,820) (106,096) (60,028) (95,729) (808,455) (508,782)
Common stock conversion date 2023-08 2023-06 2023-05 2023-03    
Purchase of shares of Class A common stock of Silvercrest Asset Management Group Inc., Transaction date 2023-08 2023-06 2023-05 2023-03    
Restricted Stock            
Class Of Stock [Line Items]            
Issuance of common stock upon vesting of restricted stock units       8,242    
Common stock conversion date       2023-03