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

Intangible Assets - Summary of Intangible Assets (Detail)

Intangible Assets - Summary of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Finite Lived Intangible Assets [Line Items]
Cost, beginning balance	$ 19,223	$ 19,223	$ 19,223
Cost, ending balance	19,223		19,223
Accumulated amortization, beginning balance	(8,056)	(6,634)	(6,634)
Amortization expense	(323)us-gaap_AmortizationOfIntangibleAssets	(360)us-gaap_AmortizationOfIntangibleAssets	(1,422)us-gaap_AmortizationOfIntangibleAssets
Accumulated amortization, ending balance	(8,379)		(8,056)
Net book value	10,844		11,167
Minimum
Finite Lived Intangible Assets [Line Items]
Useful lives	3 years
Maximum
Finite Lived Intangible Assets [Line Items]
Useful lives	20 years
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Cost, beginning balance	17,560	17,560	17,560
Cost, ending balance	17,560		17,560
Accumulated amortization, beginning balance	(6,627)	(5,410)	(5,410)
Amortization expense	(292)		(1,217)
Accumulated amortization, ending balance	(6,919)		(6,627)
Net book value	10,641		10,933
Customer Relationships \| Minimum
Finite Lived Intangible Assets [Line Items]
Useful lives	10 years		10 years
Customer Relationships \| Maximum
Finite Lived Intangible Assets [Line Items]
Useful lives	20 years		20 years
Other Intangible Assets
Finite Lived Intangible Assets [Line Items]
Cost, beginning balance	1,663	1,663	1,663
Cost, ending balance	1,663		1,663
Accumulated amortization, beginning balance	(1,429)	(1,224)	(1,224)
Amortization expense	(31)		(205)
Accumulated amortization, ending balance	(1,460)		(1,429)
Net book value	$ 203		$ 234
Other Intangible Assets \| Minimum
Finite Lived Intangible Assets [Line Items]
Useful lives	3 years		3 years
Other Intangible Assets \| Maximum
Finite Lived Intangible Assets [Line Items]
Useful lives	5 years		5 years