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

Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

Summary of Significant Accounting Policies - Additional Information (Detail)	1 Months Ended				3 Months Ended				9 Months Ended		12 Months Ended
	Aug. 31, 2023 shares	Jun. 30, 2023 shares	May 31, 2023 shares	Mar. 31, 2023 shares	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) Segment Unit shares	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) Unit shares	Jul. 29, 2021 USD ($)	Jun. 26, 2013
Summary Of Significant Accounting Policies [Line Items]
Number of operating segment \| Segment									1
Cash equivalents, maximum maturity period									90 days
Equity method investments, unrealized intercompany profit (loss) not eliminated amount									$ 0
Number of reporting unit \| Unit									1		1
Impairment charges on goodwill					$ 0			$ 0	$ 0	$ 0
Treasury stock, aggregate price					$ 773,000	$ 3,345,000		5,240,000	$ 15,057,000		$ 9,295,000
ASU 2020-04
Summary Of Significant Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adoption date					Mar. 12, 2020				Mar. 12, 2020
Change in accounting principle, accounting standards update, Adopted					true				true
Change in accounting principle, accounting standards update, Immaterial Effect					true				true
Equity or Balanced Portfolios
Summary Of Significant Accounting Policies [Line Items]
Percentage of asset management fee on threshold limit									1.00%
Asset under management, threshold limit					$ 10,000,000				$ 10,000,000
Percentage of asset management fee on balance									0.60%
Fixed Income Portfolios
Summary Of Significant Accounting Policies [Line Items]
Percentage of asset management fee on threshold limit									0.40%
Asset under management, threshold limit					10,000,000				$ 10,000,000
Percentage of asset management fee on balance									0.30%
Cortina Equity Portfolios
Summary Of Significant Accounting Policies [Line Items]
Percentage of asset management fee on balance									0.80%
Percentage of asset management fee on first threshold limit									1.00%
Asset under management, first threshold limit					25,000,000				$ 25,000,000
Percentage of asset management fee on second threshold limit									0.90%
Asset under management, second threshold limit					25,000,000				$ 25,000,000
Municipal Value Strategy
Summary Of Significant Accounting Policies [Line Items]
Percentage of income from asset management fee									0.65%
Outsourced Chief Investment Officer Portfolios
Summary Of Significant Accounting Policies [Line Items]
Percentage of asset management fee on balance									0.24%
Percentage of asset management fee on first threshold limit									0.40%
Asset under management, first threshold limit					50,000,000				$ 50,000,000
Percentage of asset management fee on second threshold limit									0.32%
Asset under management, second threshold limit					$ 50,000,000				$ 50,000,000
Minimum
Summary Of Significant Accounting Policies [Line Items]
Identifiable finite-lived intangible assets, useful life					3 years				3 years
Minimum \| Private Funds
Summary Of Significant Accounting Policies [Line Items]
Prior written notice period to terminate investment management agreements									30 days
Prior written notice period after receiving the affirmative vote, to terminate investment management agreements									60 days
Percentage of income from asset management fee									0.25%
Minimum \| Non-discretionary Assets
Summary Of Significant Accounting Policies [Line Items]
Percentage of income from asset management fee									0.05%
Maximum
Summary Of Significant Accounting Policies [Line Items]
Identifiable finite-lived intangible assets, useful life					20 years				20 years
Maximum \| Private Funds
Summary Of Significant Accounting Policies [Line Items]
Prior written notice period to terminate investment management agreements									90 days
Prior written notice period after receiving the affirmative vote, to terminate investment management agreements									90 days
Percentage of income from asset management fee									1.50%
Maximum \| Non-discretionary Assets
Summary Of Significant Accounting Policies [Line Items]
Percentage of income from asset management fee									0.01%
Leasehold Improvements
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life					10 years				10 years
Other Fixed Assets \| Minimum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life					3 years				3 years
Other Fixed Assets \| Maximum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life					7 years				7 years
Equity Method Investments
Summary Of Significant Accounting Policies [Line Items]
Impairment charges related to equity method investments					$ 0			$ 0	$ 0	$ 0
Class A Common Stock
Summary Of Significant Accounting Policies [Line Items]
Treasury stock, purchased \| shares	37,820	106,096	60,028	95,729					808,455		508,782
Treasury stock, aggregate price							$ 1,644,000
Common stock, voting rights									one vote for each share
Class A Common Stock \| Maximum
Summary Of Significant Accounting Policies [Line Items]
Stock repurchase program, authorized amount												$ 15,000,000
Class B Common Stock
Summary Of Significant Accounting Policies [Line Items]
Common stock, voting rights									one vote for each share
Class of share exchangeable to another class									one-for-one basis
Silvercrest L.P \| Class A Common Stock
Summary Of Significant Accounting Policies [Line Items]
Ownership percentage in a subsidiary					67.40%				67.40%				67.40%
Common stock, voting rights									one vote for each share