Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.19.1
Subsequent Events - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended
May 01, 2019
Apr. 12, 2019
Oct. 31, 2018
May 31, 2016
Aug. 31, 2015
Mar. 31, 2019
Class B Unit Holder            
Subsequent Event [Line Items]            
Number of shares granted           243,523
Non-Qualified Stock Options            
Subsequent Event [Line Items]            
Number of shares granted     105,398      
2012 Equity Incentive Plan            
Subsequent Event [Line Items]            
Number of shares granted       3,791 966,510  
Subsequent Event | Silvercrest L.P | 2012 Equity Incentive Plan | Restricted Stock Units | Class B Unit Holder            
Subsequent Event [Line Items]            
Number of shares granted 34,338          
Subsequent Event | Silvercrest L.P | 2012 Equity Incentive Plan | Non-Qualified Stock Options | Class B Unit Holder            
Subsequent Event [Line Items]            
Number of shares granted 60,742          
Purchase Agreement | Subsequent Event | Cortina Asset Management, LLC            
Subsequent Event [Line Items]            
Percentage to acquire business in cash   80.00%        
Purchase agreement closing period   120 days        
Additional percentage to acquire business in cash   80.00%        
Purchase Agreement | Subsequent Event | Cortina Asset Management, LLC | Maximum            
Subsequent Event [Line Items]            
Aggregate purchase amount   $ 44,937,000        
Addtional aggregate purchase amount   $ 26,209,000        
Purchase Agreement | Subsequent Event | Cortina Asset Management, LLC | Silvercrest L.P            
Subsequent Event [Line Items]            
Percentage of business combination consideration issuance   20.00%        
Additional percentage of earn out payment paid in cash   20.00%        
Potential earn-out payments period   4 years