Annual report pursuant to Section 13 and 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 12 Months Ended
Dec. 31, 2021
Nov. 30, 2021
Sep. 30, 2021
Aug. 31, 2021
Jun. 30, 2021
May 31, 2021
Mar. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Class Of Stock [Line Items]                  
Common stock, shares outstanding 9,869,101             9,869,101 9,650,692
Issuance of Class A common stock upon conversion of Class B units to Class A common stock 170,658 51,115   10,651 5,864 4,743 7,605    
Issuance of Class A common stock upon vesting of restricted stock units           856      
Purchase of shares of Class A common stock of Silvercrest Asset Management Group Inc., Shares (4,694) (1,192) (27,197)         (33,083)  
Common stock conversion date 2021-12 2021-11   2021-08 2021-06 2021-05 2021-03    
Issuance of Class A common stock upon vesting of restricted stock units, Transaction date           2021-05      
Purchase of shares of Class A common stock of Silvercrest Asset Management Group Inc., Transaction date 2021-12 2021-11 2021-09