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Deposits - Narrative (Details) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Banking and Thrift [Abstract]      
Interest on time accounts $ 853,000 $ 917,000 $ 922,000
Held-to-maturity securities pledged as collateral 50,900,000    
Available-for-sale securities pledged as collateral 36,200,000    
Certificate Of Deposit Account Registry Service (CDARS) in time deposits 14,300,000    
Insured Cash Sweep (ICS) in money market accounts 12,200,000    
Amount placed in CDARS deposits 355,000 18,300,000  
Amount of matching deposits on CDARS placed 0 0  
Deposit overdrafts reclassified as loan balances 84,000 380,000  
Related party deposit liabilities $ 8,300,000 $ 8,800,000