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

Annual report pursuant to Section 13 and 15(d)

Debt - Additional Information (Detail)

Debt - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended			0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Nov. 01, 2014	Aug. 01, 2017	Aug. 01, 2016	Aug. 01, 2015	Jun. 24, 2013	Oct. 31, 2014	Jun. 03, 2013
Schedule Of Maturities Of Long Term Debt [Line Items]
Credit facility, proceeds from borrowings		$ 7,000us-gaap_ProceedsFromLinesOfCredit
Borrowings under revolving credit facility	24us-gaap_LineOfCredit	3,000us-gaap_LineOfCredit
Interest expense including amortization of deferred financing fees	381us-gaap_InterestExpense	447us-gaap_InterestExpense	304us-gaap_InterestExpense
Promissory Note
Schedule Of Maturities Of Long Term Debt [Line Items]
Debt instrument spread on variable rate	1.00%
Debt instrument variable interest rate basis	The principal amount outstanding under these notes bear interest at the U.S. Prime Rate plus 1% in effect at the time payments are due.
Aggregate principal amount										5,300
Debt instrument reduction to principal amount									1,722
Principal amount of notes	3,578
Principal amount payment terms	As a result, the principal amounts of the notes of $3,578 are payable in four equal installments of approximately $900 on November 1, 2014, and on each of August 1, 2015, 2016 and 2017.
Number of installments	4
Installment amount payable				900
Principal amount of notes outstanding	2,683
Accrued, unpaid interest	19
Scenario Forecast \| Promissory Note
Schedule Of Maturities Of Long Term Debt [Line Items]
Installment amount payable					900	900	900
City National Bank
Schedule Of Maturities Of Long Term Debt [Line Items]
Credit facility, borrowing capacity								15,000
Credit facility, proceeds from borrowings								7,000
Borrowings under revolving credit facility	0	3,000
Interest expense including amortization of deferred financing fees	148	152
Interest on principal amount	3.75%	3.30%
Delayed Draw Term Loan \| City National Bank
Schedule Of Maturities Of Long Term Debt [Line Items]
Credit facility, borrowing capacity								7,500
Credit facility maturity date								Jun. 24, 2020
Credit facility, interest rate description	The higher of the prime rate plus a margin of 0.05 percentage points and 2.5% or (b) the LIBOR rate plus 3 percentage points, at the borrowers’ option
Credit facility, number of installments								20
Credit facility, frequency of installments	Quarterly
Delayed Draw Term Loan \| City National Bank \| Option One \| Maximum
Schedule Of Maturities Of Long Term Debt [Line Items]
Debt instrument spread on variable rate								0.05%
Debt instrument variable interest rate basis	Prime rate
Delayed Draw Term Loan \| City National Bank \| Option One \| Minimum
Schedule Of Maturities Of Long Term Debt [Line Items]
Credit facility, fixed interest rate								2.50%
Delayed Draw Term Loan \| City National Bank \| Option Two
Schedule Of Maturities Of Long Term Debt [Line Items]
Debt instrument spread on variable rate								3.00%
Debt instrument variable interest rate basis	LIBOR
Borrowings Under Revolving Credit Agreement \| City National Bank
Schedule Of Maturities Of Long Term Debt [Line Items]
Credit facility, borrowing capacity								$ 7,500
Credit facility maturity date								Dec. 24, 2016
Debt covenant, restriction on change in control								30.00%