Federal Home Loan Bank (FHLB) Advances and Other Short-Term Borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
FHLB advances - short term:
Short term	$ 2,702	$ 2,499
Other short term borrowings:
Securities sold under repurchase agreements, Weighted Average Interest Rate	0.59%	0.37%	0.25%
Long-term Debt
Fixed-rate payable and convertible fixed-rate FHLB advances, with monthly interest payments:
Due in 2016		$ 5,000
Due in 2017	$ 15,500	18,000
Due in 2018	2,000	2,000
Total FHLB advances - long term	$ 17,500	25,000
Weighted Average Interest Rate Due in 2017	3.34%
Weighted Average Interest Rate Due in 2018	1.17%
Weighted Average Interest Rate, Total FHLB advances - long term	3.09%
Short-term Debt
FHLB advances - short term:
Short term	$ 6,000	8,000
Cash management	17,000	9,000
Total FHLB advances - short term	$ 23,000	17,000
Weighted Average Interest Rate Short term	0.65%
Weighted Average Interest Rate Cash management	0.57%
Total FHLB advances - short term, Weighted Average Interest Rate	0.59%
Total FHLB advances, Weighted Average Interest Rate	1.67%
Total FHLB advances	$ 40,500	42,000
Other short term borrowings:
Securities sold under repurchase agreements	2,702	2,499
Total FHLB advances and other short term borrowings	$ 43,202	$ 44,499
Securities sold under repurchase agreements, Weighted Average Interest Rate	0.33%
Total FHLB advances and other short-term borrowings, Weighted Average Interest Rate	1.59%