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)	1 Months Ended	3 Months Ended
	Feb. 28, 2015	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2013
Class Of Stock [Line Items]
Stock issued upon vesting of deferred equity units, transaction date		Feb. 28, 2015
Common stock issuance date		Mar. 31, 2015
Balance, Shares		4,520,413us-gaap_CommonStockSharesOutstanding	4,710,000us-gaap_CommonStockSharesOutstanding	4,465,000us-gaap_CommonStockSharesOutstanding
Class B common stock issued upon vesting of deferred equity units	126,616	126,616
Cancellation of Class B common stock upon conversion of Class B units to Class A common stock		18,000
Balance, Shares		4,629,029us-gaap_CommonStockSharesOutstanding	4,710,000us-gaap_CommonStockSharesOutstanding	4,465,000us-gaap_CommonStockSharesOutstanding
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		(18,000)