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Federal Home Loan Bank Advances - Summary of Contractual Maturities and Average Effective Rates of Outstanding Advances (Details) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Federal Home Loan Bank Advances Maturities Summary [Abstract]    
2016   $ 45,000,000
2017 $ 55,000,000  
Total $ 55,000,000 $ 45,000,000
2016   0.57%
2017 0.80%  
Total 0.80% 0.57%