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Income Taxes - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]      
Net operating loss carryforwards $ 0    
Unrecognized tax benefits 0    
Pro forma effective income tax rate     47.00%
Pro forma income tax (benefit) expense $ 0 $ 0 $ (137,000)