Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

v3.4.0.3
Income Taxes - Additional Information (Detail) - USD ($)
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Schedule Of Income Taxes [Line Items]    
Federal and state income tax expense $ 600,000 $ 400,000
Unrecognized tax benefits 0 0
Interest or penalties related to uncertain tax positions 0 $ 0
Current prepaid taxes 100,000  
Deferred tax liability $ 1,300,000  
Tax Year 2013 [Member]    
Schedule Of Income Taxes [Line Items]    
Tax years open to examination 2013  
Latest Tax Year [Member]    
Schedule Of Income Taxes [Line Items]    
Tax years open to examination 2015