Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Summary of Amounts Allocated to Acquired Assets and Assumed Liabilities (Detail)

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Acquisitions - Summary of Amounts Allocated to Acquired Assets and Assumed Liabilities (Detail) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Dec. 31, 2014
Business Acquisition [Line Items]      
Goodwill $ 25,168 $ 24,682 $ 20,008
Jamison      
Business Acquisition [Line Items]      
Prepaid expense 135    
Furniture and equipment 335    
Security deposits 30    
Capital leases (253)    
Deferred rent (19)    
Total fair value of net tangible assets acquired 228    
Goodwill 4,674    
Total purchase consideration 10,706    
Jamison | Customer Relationships      
Business Acquisition [Line Items]      
Intangible asset 5,000    
Jamison | Non-compete Agreements      
Business Acquisition [Line Items]      
Intangible asset $ 804