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
	Sep. 30, 2024 USD ($) shares	Aug. 31, 2024 shares	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) Segment Unit shares	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) Unit shares	Aug. 16, 2024 USD ($)	Jul. 29, 2021 USD ($)	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	$ 16,421,000		16,421,000		$ 16,421,000		$ 15,057,000
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		$ 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		$ 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		$ 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		$ 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		$ 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		$ 50,000,000
Minimum
Summary Of Significant Accounting Policies [Line Items]
Identifiable finite-lived intangible assets, useful life	3 years		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		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		10 years
Other Fixed Assets \| Minimum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	3 years		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		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	60,600	22,077
Common stock, voting rights					one vote for each share
Class A Common Stock \| 2021 Repurchase Program
Summary Of Significant Accounting Policies [Line Items]
Treasury stock, purchased \| shares							808,455
Treasury stock, aggregate price							$ 15,057,000
Class A Common Stock \| 2021 Repurchase Program \| Maximum
Summary Of Significant Accounting Policies [Line Items]
Stock repurchase program, authorized amount									$ 15,000,000
Class A Common Stock \| 2024 Repurchase Program
Summary Of Significant Accounting Policies [Line Items]
Treasury stock, purchased \| shares					82,677
Treasury stock, aggregate price	$ 1,364,000		$ 1,364,000		$ 1,364,000
Class A Common Stock \| 2024 Repurchase Program \| Maximum
Summary Of Significant Accounting Policies [Line Items]
Stock repurchase program, authorized amount								$ 12,000,000
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	68.30%		68.30%		68.30%					68.30%
Common stock, voting rights					one vote for each share