Silvercrest Asset Management Group LLC Annual report pursuant to Section 13 and 15(d)

Equity - Class A Common Stock (Detail) - Class A Common Stock - shares	1 Months Ended
	Dec. 31, 2018	Nov. 30, 2018	Sep. 30, 2018	Aug. 31, 2018	May 31, 2018	Apr. 30, 2018	Mar. 31, 2018	Jan. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Class Of Stock [Line Items]
Common stock, shares outstanding	8,518,096								8,142,120	8,074,000	7,990,000
Issuance of Class A common stock upon conversion of Class B units to Class A common stock	108,319	64,142	17,666	22,285	24,732	20,000	85,286	31,650
Issuance of Class A common stock upon vesting of restricted stock units					1,896
Common stock conversion date	Dec. 31, 2018	Nov. 30, 2018	Sep. 30, 2018	Aug. 31, 2018	May 31, 2018	Apr. 30, 2018	Mar. 31, 2018	Jan. 31, 2018
Stock issued upon vesting of restricted stock units, Transaction date					May 31, 2018