Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.23.1
Summary of Significant Accounting Policies - Additional Information (Detail)
 1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2023
USD ($)
shares
Mar. 31, 2023
USD ($)
Segment
Unit
shares
Mar. 31, 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      
Treasury stock, aggregate price   $ 10,939,000   $ 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        
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      
Class A Common Stock            
Summary Of Significant Accounting Policies [Line Items]            
Treasury stock, purchased | shares 95,729 604,511   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 67.80% 67.80%       67.80%
Common stock, voting rights   one vote for each share