Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.24.0.1
Summary of Significant Accounting Policies - Additional Information (Detail)
 1 Months Ended 12 Months Ended
Aug. 31, 2023
shares
Jun. 30, 2023
shares
May 31, 2023
shares
Mar. 31, 2023
shares
Dec. 31, 2023
USD ($)
Segment
Unit
shares
Dec. 31, 2022
USD ($)
Unit
shares
Dec. 31, 2021
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    
Treasury stock, aggregate price         $ 15,057,000 9,295,000      
ASU 2016-13                  
Summary Of Significant Accounting Policies [Line Items]                  
Change in accounting principle, accounting standards update, adoption date         Jan. 01, 2020        
Change in accounting principle, accounting standards update, Adopted         true        
Change in accounting principle, accounting standards update, Immaterial Effect         true        
ASU 2018-15                  
Summary Of Significant Accounting Policies [Line Items]                  
Change in accounting principle, accounting standards update, adoption date         Jan. 01, 2020        
Change in accounting principle, accounting standards update, Adopted         true        
Change in accounting principle, accounting standards update, Immaterial Effect         true        
ASU 2020-04                  
Summary Of Significant Accounting Policies [Line Items]                  
Change in accounting principle, accounting standards update, adoption date         Mar. 12, 2020        
Change in accounting principle, accounting standards update, Adopted         true        
Change in accounting principle, accounting standards update, Immaterial Effect         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        
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        
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        
Percentage of asset management fee on second threshold limit         0.90%        
Asset under management, second threshold limit         $ 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        
Percentage of asset management fee on second threshold limit         0.32%        
Asset under management, second threshold limit         $ 50,000,000        
Minimum                  
Summary Of Significant Accounting Policies [Line Items]                  
Identifiable finite-lived intangible assets, useful life         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        
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        
Other Fixed Assets | Minimum                  
Summary Of Significant Accounting Policies [Line Items]                  
Property, plant and equipment, useful life         3 years        
Other Fixed Assets | Maximum                  
Summary Of Significant Accounting Policies [Line Items]                  
Property, plant and equipment, useful life         7 years        
Equity Method Investments                  
Summary Of Significant Accounting Policies [Line Items]                  
Impairment charges related to equity method investments         $ 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      
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         67.10% 66.80%     67.10%
Common stock, voting rights         one vote for each share