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

Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Detail)

Commitments and Contingencies - Additional Information (Detail) - USD ($)				1 Months Ended												3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 06, 2019	Dec. 13, 2018	Jan. 16, 2018	Mar. 31, 2019	Mar. 31, 2018	Jan. 31, 2018	Jul. 31, 2017	Jan. 31, 2017	Sep. 30, 2016	Jan. 31, 2016	Dec. 31, 2015	Oct. 31, 2015	Jul. 31, 2015	Jun. 30, 2015	Mar. 31, 2014	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2014	Dec. 31, 2018
Commitments And Contingencies [Line Items]
Operating lease rent expense																$ 1,529,000	$ 1,386,000	$ 3,058,000	$ 2,898,000
Sub-lease income																38,000	83,000	70,000	158,000
Assets acquired under finance leases																157,000		157,000
Finance lease obligation																160,000		160,000
Depreciation expense																22,000	40,000	53,000	61,000
Additional Office Space
Commitments And Contingencies [Line Items]
Operating lease rent expense, net									$ 10,000						$ 5,000
Refundable security deposit															$ 3,000
Lease commencement date									Oct. 01, 2017						May 01, 2014
Lease expires									Nov. 30, 2024						Jul. 31, 2019
Number of rent free periods															3 months
Rent credit									$ 40,000
Additional Office Space \| Amendment Number Two
Commitments And Contingencies [Line Items]
Lease commencement date			Jan. 16, 2018
Lease expires			Nov. 30, 2028
Lease expansion date			Jan. 12, 2018
Office Space \| Charlottesville, VA.
Commitments And Contingencies [Line Items]
Operating lease rent expense, net														$ 2,000
Refundable security deposit														$ 2,000
Lease commencement date														Jun. 30, 2015
Lease expires														Jun. 30, 2018
Office Space \| Bedminster, NJ.
Commitments And Contingencies [Line Items]
Operating lease rent expense, net														$ 11,000
Lease expires														Mar. 31, 2022
Number of rent free periods														4 months
Office Space \| Princeton, NJ.
Commitments And Contingencies [Line Items]
Operating lease rent expense, net										$ 6,000				$ 5,000
Lease expires										Aug. 31, 2022				Apr. 30, 2016
Number of rent free periods										5 months
Office Space \| New York City
Commitments And Contingencies [Line Items]
Operating lease rent expense, net											$ 446,000
Lease commencement date											Oct. 01, 2017
Lease expires											Sep. 30, 2028
Number of rent free periods											12 months
Payments for tenant improvements											$ 2,080,000
Office Space \| Livingston, NJ
Commitments And Contingencies [Line Items]
Operating lease rent expense, net										$ 2,000
Lease expires										Jan. 31, 2019
Office Space \| Boston, MA
Commitments And Contingencies [Line Items]
Operating lease rent expense, net						$ 33,000
Lease commencement date						Jan. 01, 2018
Lease expires						Apr. 30, 2023
Number of rent free periods						1 month
Office Space \| La Jolla, CA
Commitments And Contingencies [Line Items]
Operating lease rent expense, net		$ 3,000
Lease expires		Jan. 31, 2020
Office Space \| Extended Lease Agreement \| Charlottesville, VA.
Commitments And Contingencies [Line Items]
Lease commencement date	Jul. 01, 2019
Lease expires	Jun. 30, 2022
Lease extended period	3 years
Office Equipment
Commitments And Contingencies [Line Items]
Finance lease obligation																160,000		160,000			$ 188,000
Office Equipment \| Telephone System
Commitments And Contingencies [Line Items]
Lease expires																				Nov. 30, 2018
Assets acquired under finance leases																				$ 321,000
Finance lease, period																				5 years
Finance lease, minimum monthly payment																				$ 5,000
Office Equipment \| Copier
Commitments And Contingencies [Line Items]
Lease expires					Feb. 28, 2021			Dec. 31, 2018				Oct. 31, 2018	Jun. 30, 2018
Assets acquired under finance leases					$ 11,000			$ 11,000				$ 18,000	$ 21,000
Finance lease, period					3 years			2 years				3 years	3 years
Finance lease, minimum monthly payment					$ 300			$ 1,000				$ 1,000	$ 1,000
Office Equipment \| Copier \| Through February 28,2022
Commitments And Contingencies [Line Items]
Lease expires				Feb. 28, 2022
Assets acquired under finance leases				$ 13,000
Finance lease, period				3 years
Finance lease, minimum monthly payment				$ 400
Office Equipment \| Copier \| Through May 31, 2022
Commitments And Contingencies [Line Items]
Lease expires				May 31, 2022
Assets acquired under finance leases				$ 12,000
Finance lease, period				39 months
Finance lease, minimum monthly payment				$ 400
Office Equipment \| Two Copiers
Commitments And Contingencies [Line Items]
Lease expires								Jan. 31, 2022
Assets acquired under finance leases								$ 152,000
Finance lease, period								5 years
Finance lease, minimum monthly payment								$ 3,000
Office Equipment \| Four Copiers
Commitments And Contingencies [Line Items]
Lease expires							Jun. 30, 2020
Assets acquired under finance leases							$ 72,000
Finance lease, period							3 years
Finance lease, minimum monthly payment							$ 2,000
Office Equipment \| Jamison
Commitments And Contingencies [Line Items]
Assets acquired under finance leases														$ 253,000
Letter of Credit
Commitments And Contingencies [Line Items]
Refundable security deposit																506,000		506,000			$ 506,000
Letter of Credit \| Boston landlord
Commitments And Contingencies [Line Items]
Refundable security deposit																80,000		80,000
General and administrative
Commitments And Contingencies [Line Items]
Operating lease rent expense, net																$ 1,491,000	$ 1,303,000	$ 2,988,000	$ 2,740,000