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)									1 Months Ended			12 Months Ended
Debt - Additional Information (Detail)	Dec. 21, 2017	Aug. 01, 2017 USD ($)	Aug. 02, 2016 USD ($)	Aug. 01, 2015 USD ($)	Nov. 01, 2014 USD ($)	Jun. 28, 2013 USD ($)	Jun. 24, 2013 USD ($) Installment	Jun. 03, 2013 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2017 USD ($) Installment	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Jun. 30, 2015 USD ($)	Oct. 31, 2014 USD ($)
Debt Instrument [Line Items]
Interest expense including amortization of deferred financing fees												$ 112,000	$ 228,000	$ 261,000
Promissory Note
Debt Instrument [Line Items]
Variable rate notes issued for redemption of partners' interests, spread								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								$ 5,300,000
Debt instrument reduction to principal amount																$ 1,722,000
Principal amount of notes												$ 3,578,000
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 \| Installment												4
Installment amount payable		$ 900,000	$ 900,000	$ 900,000	$ 900,000
Principal amount of notes outstanding												$ 0	895,000
Accrued, unpaid interest												$ 0	17,000
Promissory Note \| Jamison
Debt Instrument [Line Items]
Variable rate notes issued for redemption of partners' interests, spread												5.00%
Debt instrument variable interest rate basis												The principal amount outstanding under the notes bears interest at 5% per annum.
Aggregate principal amount															$ 2,165,000
Principal amount payment terms												The principal amounts of the notes are payable in three equal installments of approximately $722 on each of June 30, 2016, 2017 and 2018.
Number of installments \| Installment												3
Installment amount payable										$ 722,000	$ 722,000
Principal amount of notes outstanding												$ 722,000	1,443,000
Accrued, unpaid interest												18,000	36,000
Promissory Note \| Scenario Forecast \| Jamison
Debt Instrument [Line Items]
Installment amount payable									$ 722,000
City National Bank
Debt Instrument [Line Items]
Credit facility, borrowing capacity							$ 15,000,000
Credit facility, proceeds from borrowings						$ 7,000,000
Borrowings under revolving credit facility												0	0
Interest expense including amortization of deferred financing fees												$ 17,000	$ 47,000	$ 40,000
Delayed Draw Term Loan \| City National Bank
Debt Instrument [Line Items]
Credit facility, borrowing capacity							$ 7,500,000
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.
Variable rate notes issued for redemption of partners' interests, spread							3.00%
Debt instrument variable interest rate basis												LIBOR
Credit facility, number of installments \| Installment							20
Credit facility, frequency of installments												Quarterly
Delayed Draw Term Loan \| City National Bank \| Maximum
Debt Instrument [Line Items]
Variable rate notes issued for redemption of partners' interests, spread							0.05%
Debt instrument variable interest rate basis												Prime rate
Delayed Draw Term Loan \| City National Bank \| Minimum
Debt Instrument [Line Items]
Credit facility, fixed interest rate							2.50%
Borrowings Under Revolving Credit Agreement \| City National Bank
Debt Instrument [Line Items]
Credit facility, borrowing capacity							$ 7,500,000
Credit facility maturity date												Dec. 23, 2017
Debt covenant, restriction on change in control							30.00%
Line of credit facility extended term	1 year