Annual report pursuant to Section 13 and 15(d)

Organization and Business - Additional Information (Detail)

v3.8.0.1
Organization and Business - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Jun. 26, 2013
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Apr. 01, 2012
Oct. 03, 2008
Dec. 31, 2004
Mar. 11, 2004
Business And Organization [Line Items]                
Tax receivable agreement with limited partner, percentage of cash savings to be paid   85.00%            
Recognition of tax receivable agreement liability   $ 8,653            
Percentage of cash savings expected to be realized   15.00%            
Valuation adjustment to TRA related to underlying deferred tax assets   $ 5,299 $ (152) $ 1,209        
TRA payments totaling   $ 731 $ 690 $ 689        
Silvercrest Financial Services Inc                
Business And Organization [Line Items]                
Percentage of outstanding shares acquired               100.00%
Sam Alternative Solutions Inc                
Business And Organization [Line Items]                
Percentage of outstanding shares acquired             100.00%  
Marathon Capital Group, LLC                
Business And Organization [Line Items]                
Percentage of outstanding shares acquired           100.00%    
MW Commodity Advisors, LLC                
Business And Organization [Line Items]                
Percentage of outstanding shares acquired         100.00%      
Silvercrest L.P | Class A Common Stock                
Business And Organization [Line Items]                
Number of shares held by parent 8,142,120              
Percentage ownership in a consolidated subsidiary 61.60% 62.00% 62.00%