Quarterly report pursuant to Section 13 or 15(d)

Organization and Business - Additional Information (Detail)

v3.2.0.727
Organization and Business - Additional Information (Detail) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 26, 2013
Jun. 30, 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   $ 15,049        
Percentage of cash savings expected to be realized   15.00%        
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%      
Class A Common Stock            
Business And Organization [Line Items]            
Percentage ownership in a consolidated subsidiary 62.00% 62.00%        
Number of shares held by parent 7,847,256