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Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]        
Goodwill $ 27,095 $ 26,841 $ 27,095 $ 21,720
Amortization of intangible assets $ 183 $ 142