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Goodwill and Other Intangible Assets - Summary of Acquired Intangible Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Acquired Finite Lived Intangible Assets [Line Items]    
Acquired intangible assets, Cost $ 12,613 $ 5,634
Acquired intangible assets, Accumulated Amortization (6,073) (5,595)
Acquired intangible assets, Net 6,540 39
Customer Relationships    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquired intangible assets, Cost 3,532 2,739
Acquired intangible assets, Accumulated Amortization (2,812) (2,739)
Acquired intangible assets, Net 720  
Lead Provider and Broker Relationships    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquired intangible assets, Cost 5,689 2,489
Acquired intangible assets, Accumulated Amortization (2,809) (2,489)
Acquired intangible assets, Net 2,880  
Trademarks    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquired intangible assets, Cost 2,592 406
Acquired intangible assets, Accumulated Amortization (372) (367)
Acquired intangible assets, Net 2,220 $ 39
Non-Competition Agreements    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquired intangible assets, Cost 800  
Acquired intangible assets, Accumulated Amortization (80)  
Acquired intangible assets, Net $ 720