Quarterly report pursuant to Section 13 or 15(d)

Equity - Additional Information (Detail)

v3.19.1
Equity - Additional Information (Detail) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
Mar. 31, 2019
Jan. 31, 2019
Mar. 31, 2019
Mar. 31, 2018
Class Of Stock [Line Items]        
Partnership distributions, amount     $ 2,285 $ 2,072
Distributions of partner incentive allocations of net income     $ 27,199 $ 24,935
Class B Common Stock        
Class Of Stock [Line Items]        
Share conversion, Shares     (17,000) (117,000)
Class B Common Stock | Resale And Registration Rights Agreement        
Class Of Stock [Line Items]        
Share conversion, Shares 17,074      
Class B Common Stock | Neosho        
Class Of Stock [Line Items]        
Issuance of Class B common stock in connection with the Neosho Acquisition   1,516    
Silvercrest L.P        
Class Of Stock [Line Items]        
Accrued partner incentive allocations     $ 5,178 $ 6,763