Silvercrest Asset Management Group LLC Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Class B Common Stock (Detail) - Class B Common Stock - shares	1 Months Ended					9 Months Ended
	Aug. 31, 2015	Jun. 30, 2015	May. 31, 2015	Mar. 31, 2015	Feb. 28, 2015	Sep. 30, 2015	Sep. 30, 2014
Class Of Stock [Line Items]
Stock issued upon vesting of deferred equity units, transaction date					Feb. 28, 2015
Common stock conversion date	Aug. 31, 2015		May 31, 2015	Mar. 31, 2015
Common stock issuance date		Jun. 30, 2015
Balance, Shares						4,520,413	4,465,000
Class B common stock issued upon vesting of deferred equity units					126,616
Cancellation of Class B common stock upon conversion of Class B units to Class A common stock						134,000	136,000
Balance, Shares						4,772,130	4,570,000
Resale And Registration Rights Agreement
Class Of Stock [Line Items]
Cancellation of Class B common stock upon conversion of Class B units to Class A common stock	(65,477)		(50,000)	(18,000)
Jamison
Class Of Stock [Line Items]
Class B common stock issued upon vesting of deferred equity units		258,578