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Securities - Narrative (Details) - USD ($)
3 Months Ended
Mar. 31, 2016
Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]    
Available-for-sale securities pledged as collateral   $ 81,068,000
Proceeds from sale of available-for-sale securities $ 5,072,500  
Gains from sale of securities 83,263  
Losses from sale of securities $ 0