Annual report pursuant to Section 13 and 15(d)

Acquisitions - Summary of Purchase Consideration (Detail)

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Acquisitions - Summary of Purchase Consideration (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Business Acquisition [Line Items]        
Cash paid on date of acquisition     $ 1,805 $ 703
Jamison        
Business Acquisition [Line Items]        
Cash paid on date of acquisition $ 3,550      
Notes payable to Jamison and Principals of Jamison 2,165      
Units issued 3,562      
Contingent consideration 1,429 $ 1,342    
Total purchase consideration $ 10,706