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

Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Additional Information (Detail)

Acquisitions - Additional Information (Detail) $ in Thousands							1 Months Ended			3 Months Ended		9 Months Ended		12 Months Ended
	Aug. 01, 2016 USD ($)	Dec. 15, 2015 USD ($)	Aug. 01, 2015 USD ($)	Mar. 30, 2015 USD ($)	Nov. 01, 2014 USD ($)	Mar. 28, 2013 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2013 USD ($)	Apr. 30, 2013 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) Installment	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2013 USD ($) Installment
Business Acquisition [Line Items]
Income before provision for income taxes										$ 3,934	$ 4,217	$ 11,084	$ 13,886
Promissory Note
Business Acquisition [Line Items]
Number of installments \| Installment												4
Installment amount payable	$ 900		$ 900		$ 900
Cappiccille
Business Acquisition [Line Items]
Cash paid on date of acquisition		$ 148
Contingent consideration		$ 354										$ 354
Earn out payments percentage on revenue remainder of fiscal year		19.00%
Earn out payments percentage on revenue due in two years		19.00%
Earn out payments percentage on revenue due in three years		19.00%
Earn out payments percentage on revenue due in four years		19.00%
Earn out payments percentage on revenue due thereafter		19.00%
Jamison
Business Acquisition [Line Items]
Cash paid on date of acquisition				$ 3,550
Contingent consideration				1,429								1,162		$ 1,342
Equity consideration for SLP acquired				$ 3,562
Earn out payments percentage on EBITDA remainder of fiscal year				20.00%
Earn out payments percentage on EBITDA due in two years				20.00%
Earn out payments percentage on EBITDA due in three years				20.00%
Earn out payments percentage on EBITDA due in four years				20.00%
Earn out payments percentage on EBITDA due in five years				20.00%
Earn Out Payments Percentage On EBITDA Due thereafter				20.00%
Revenue										1,407	1,465	3,856	1,465
Income before provision for income taxes										339	$ 188	$ 681	$ 188
Jamison \| Promissory Note
Business Acquisition [Line Items]
Number of installments \| Installment												3
Installment amount payable							$ 722
Jamison \| Seller Note
Business Acquisition [Line Items]
Promissory note issued				$ 394
Interest on principal amount				5.00%
Jamison \| Principals Notes
Business Acquisition [Line Items]
Promissory note issued				$ 1,771
Interest on principal amount				5.00%
Ten-Sixty
Business Acquisition [Line Items]
Cash paid on date of acquisition						$ 2,500
Promissory note issued						1,479
Acquisition of assets						$ 1,900,000
Ten-Sixty \| Promissory Note
Business Acquisition [Line Items]
Number of installments \| Installment															2
Installment amount payable								$ 218	$ 218
Quarterly installments from June 30, 2014 through March 31, 2017															$ 87
Principal on fixed rate notes, interest rate								5.00%							5.00%
Outstanding note payable										189		$ 189
Milbank
Business Acquisition [Line Items]
Equity consideration for SLP acquired										$ 223		$ 223		$ 673