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Goodwill and Intangible Assets - Information Regarding Intangible Assets (Detail) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]    
Net Carrying Value $ 526 $ 594
Customer relationships [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 1,275 1,275
Accumulated Amortization (749) (681)
Net Carrying Value $ 526 $ 594