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

Annual report pursuant to Section 13 and 15(d)

Acquisitions - Additional Information (Detail)

Acquisitions - Additional Information (Detail) (USD $)	3 Months Ended								12 Months Ended			0 Months Ended		9 Months Ended	1 Months Ended
Acquisitions - Additional Information (Detail) (USD $)	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Nov. 01, 2014	Mar. 28, 2013	Dec. 31, 2013	Dec. 31, 2013	Apr. 30, 2013	Mar. 31, 2012
Business Acquisition [Line Items]
Contingent purchase price payment									$ 511,000	$ 462,000	$ 75,000
Cash consideration under Asset Purchase Agreement									1,805,000	703,000	720,000
Revenue	17,709,000us-gaap_Revenues	17,817,000us-gaap_Revenues	17,226,000us-gaap_Revenues	16,720,000us-gaap_Revenues	17,157,000us-gaap_Revenues	14,737,000us-gaap_Revenues	14,472,000us-gaap_Revenues	13,685,000us-gaap_Revenues	69,472,000us-gaap_Revenues	60,051,000us-gaap_Revenues	51,690,000us-gaap_Revenues
Net income	1,122,000us-gaap_NetIncomeLoss	1,358,000us-gaap_NetIncomeLoss	1,351,000us-gaap_NetIncomeLoss	944,000us-gaap_NetIncomeLoss	2,026,000us-gaap_NetIncomeLoss	734,000us-gaap_NetIncomeLoss			4,775,000us-gaap_NetIncomeLoss	13,690,000us-gaap_NetIncomeLoss
Promissory Note
Business Acquisition [Line Items]
Number of installments									4
Installment amount payable												900,000
Milbank
Business Acquisition [Line Items]
Fair value adjustments on acquired assets	541,000				148,000				541,000	148,000				148,000	148,000
Liability for contingent consideration	1,325,000				1,295,000				1,325,000	1,295,000				1,295,000	1,295,000
Contingent purchase price payment									511,000	462,000
Commodity Advisors
Business Acquisition [Line Items]
Units issued for acquisition																	132,000
Ten-Sixty
Business Acquisition [Line Items]
Acquisition of assets													1,900,000,000
Cash consideration under Asset Purchase Agreement										2,500,000			2,500,000
Promissory note issued													1,479,000
Costs related to acquisition										51,000
Fair value of assets acquired					0					0				0	0
Revenue														1,020,000
Net income														126,000
Ten-Sixty \| Promissory Note
Business Acquisition [Line Items]
Number of installments										2
Installment amount payable															218,000	218,000
Quarterly installments from June 30, 2014 through March 31, 2017										$ 87,000
Interest on principal amount					5.00%					5.00%				5.00%	5.00%