Quarterly report pursuant to Section 13 or 15(d)

Equity - Additional Information (Detail)

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Equity - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2023
May 31, 2023
Mar. 31, 2023
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Jul. 29, 2021
Class Of Stock [Line Items]                    
Partnership distributions, amount       $ 2,078,000   $ 3,524,000 $ 6,192,000 $ 6,209,000    
Distributions of partner incentive allocations of net income             32,262,000 34,429,000    
Treasury stock, aggregate price       $ 3,345,000     $ 14,284,000   $ 9,295,000  
Class B Common Stock                    
Class Of Stock [Line Items]                    
Share conversion, Shares       (65)            
Stock issued during period, shares, acquisitions   1,376                
Class B Common Stock | Restricted Stock                    
Class Of Stock [Line Items]                    
Issuance of common stock   50,081                
Class B Common Stock | Neosho                    
Class Of Stock [Line Items]                    
Stock issued during period, shares, acquisitions   1,376                
Class B Common Stock | Resale And Registration Rights Agreement                    
Class Of Stock [Line Items]                    
Share conversion, Shares 21,243 44,669 1,555              
Class A Common Stock                    
Class Of Stock [Line Items]                    
Share conversion, Shares       65            
Treasury stock, purchased 106,096 60,028 95,729 166     770,635   508,782  
Treasury stock, aggregate price         $ 1,644,000          
Conversion of Stock, Shares Issued 21,243 44,669 1,555              
Class A Common Stock | Maximum                    
Class Of Stock [Line Items]                    
Stock repurchase program, authorized amount                   $ 15,000,000
Class A Common Stock | Restricted Stock                    
Class Of Stock [Line Items]                    
Issuance of common stock     8,242              
Silvercrest L.P                    
Class Of Stock [Line Items]                    
Accrued partner incentive allocations       $ 6,962,000   $ 8,323,000 $ 13,493,000 $ 16,950,000