Quarterly report pursuant to Section 13 or 15(d)

Equity - Additional Information (Detail)

v3.20.1
Equity - Additional Information (Detail) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
Mar. 31, 2020
Feb. 29, 2020
May 31, 2019
Mar. 31, 2020
Mar. 31, 2019
Class Of Stock [Line Items]          
Partnership distributions, amount       $ 2,226 $ 2,285
Distributions of partner incentive allocations of net income       $ 27,245 $ 27,199
Class B Common Stock          
Class Of Stock [Line Items]          
Share conversion, Shares       (176,000) (17,000)
Class B Common Stock | Resale And Registration Rights Agreement          
Class Of Stock [Line Items]          
Share conversion, Shares 20,662 155,224 20,662    
Silvercrest L.P          
Class Of Stock [Line Items]          
Accrued partner incentive allocations       $ 7,377 $ 5,178