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

Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Detail)

Commitments and Contingencies - Additional Information (Detail) - USD ($)			1 Months Ended											12 Months Ended
	Jan. 16, 2018	Jun. 30, 2015	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	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Commitments And Contingencies [Line Items]
Operating lease rent expense														$ 5,779,000	$ 4,369,000	$ 3,760,000
Sub-lease income														216,000	278,000	289,000
Assets acquired under capital leases														11,000	301,000
Depreciation expense														747,000	975,000	737,000
Capital Lease Assets
Commitments And Contingencies [Line Items]
Depreciation expense														146,000	142,000	124,000
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										$ 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
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 \| Extended Lease Agreement \| Charlottesville, VA.
Commitments And Contingencies [Line Items]
Lease commencement date												Jul. 01, 2018
Lease expires												Jun. 30, 2019
Lease extended period												1 year
Office Equipment
Commitments And Contingencies [Line Items]
Capital lease obligation														$ 188,000	299,000
Office Equipment \| Telephone System
Commitments And Contingencies [Line Items]
Lease expires														Nov. 30, 2018
Assets acquired under capital leases														$ 321,000
Capital lease, period														5 years
Capital 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 capital leases			$ 11,000			$ 11,000				$ 18,000	$ 21,000
Capital lease, period						2 years				3 years	3 years
Capital lease, minimum monthly payment			$ 300			$ 1,000				$ 1,000	$ 1,000
Office Equipment \| Two Copiers
Commitments And Contingencies [Line Items]
Lease expires						Jan. 31, 2022
Assets acquired under capital leases						$ 152,000
Capital lease, period						5 years
Capital lease, minimum monthly payment						$ 3,000
Office Equipment \| Four Copiers
Commitments And Contingencies [Line Items]
Lease expires					Jun. 30, 2020
Assets acquired under capital leases					$ 72,000
Capital lease, period					3 years
Capital lease, minimum monthly payment					$ 2,000
Office Equipment \| Jamison
Commitments And Contingencies [Line Items]
Assets acquired under capital leases		$ 253,000
Letter of Credit
Commitments And Contingencies [Line Items]
Refundable security deposit														506,000	506,000
Letter of Credit \| Boston landlord
Commitments And Contingencies [Line Items]
Refundable security deposit														80,000
General and administrative
Commitments And Contingencies [Line Items]
Operating lease rent expense, net														$ 5,563,000	$ 4,091,000	$ 3,471,000