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
	Apr. 12, 2019	Dec. 13, 2018	Jan. 16, 2018	Aug. 31, 2019	Jul. 31, 2019	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	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Commitments And Contingencies [Line Items]
Operating lease rent expense																		$ 6,214,000	$ 5,779,000	$ 4,369,000
Sub-lease income																		106,000	216,000	278,000
Assets acquired under finance leases																		198,000
Finance lease obligation																		196,000
Depreciation expense																		978,000	747,000	975,000
Copier \| Through February 28,2022
Commitments And Contingencies [Line Items]
Lease expired						Feb. 28, 2022
Assets acquired under finance leases						$ 13,000
Finance lease, period						3 years
Finance lease, minimum monthly payment						$ 400
Copier \| Through May 31, 2022
Commitments And Contingencies [Line Items]
Lease expired						May 31, 2022
Assets acquired under finance leases						$ 12,000
Finance lease, period						39 months
Finance lease, minimum monthly payment						$ 400
Two Copiers \| Lease Agreement July 31, 2022
Commitments And Contingencies [Line Items]
Lease expired				Jul. 31, 2022
Assets acquired under finance leases				$ 51,000
Finance lease, period				3 years
Finance lease, minimum monthly payment				$ 1,000
Cortina Asset Management, LLC \| Copier \| Lease Agreement November 2021
Commitments And Contingencies [Line Items]
Lease expired					Nov. 30, 2021
Finance lease, minimum monthly payment					$ 1,000
Finance Lease Assets
Commitments And Contingencies [Line Items]
Depreciation expense																		106,000	146,000	142,000
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 expired											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 expired			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 expired																Jun. 30, 2018
Office Space \| Bedminster, NJ.
Commitments And Contingencies [Line Items]
Operating lease rent expense, net																$ 11,000
Lease expired																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
Lease expired												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 expired													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 expired								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 expired		Jan. 31, 2020
Office Space \| San Diego, CA
Commitments And Contingencies [Line Items]
Operating lease rent expense, net		$ 12,000
Lease commencement date		Feb. 01, 2020
Lease expired		Jun. 30, 2025
Number of rent free periods		4 months
Payments for tenant improvements		$ 27,000
Office Space \| Milwaukee, WI
Commitments And Contingencies [Line Items]
Operating lease rent expense, net	$ 12,000
Lease expired	Dec. 31, 2020
Office Space \| Extended Lease Agreement \| Charlottesville, VA.
Commitments And Contingencies [Line Items]
Lease commencement date																Jul. 01, 2019
Lease expired																Jun. 30, 2022
Lease extended period																3 years
Office Equipment
Commitments And Contingencies [Line Items]
Finance lease obligation																		$ 196,000	188,000
Office Equipment \| Telephone System
Commitments And Contingencies [Line Items]
Lease expired																		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 expired							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 \| Two Copiers
Commitments And Contingencies [Line Items]
Lease expired										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 expired									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
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																		$ 6,108,000	$ 5,563,000	$ 4,091,000