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Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Income Tax Disclosure [Abstract]          
Provision for income taxes $ 312 $ 608 $ 663 $ 884  
Effective tax rate     29.20% 30.70%  
Net deferred tax assets $ 7,800   $ 7,800   $ 7,900