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Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Measurements, Recurring [Member]
Fair Value Disclosure, Securities Available-for-Sale [Abstract]
Fair Value Disclosure, Agency Obligations	$ 53,062	$ 45,471
Fair Value Disclosure, Agency RMBS	133,072	127,787
Fair Value Disclosure, State and Political Subdivisions	71,563	70,314
Fair Value Disclosure, Securities Available-for-Sale, Total	257,697	243,572
Other Assets, Fair Value Disclosure	52	241
Assets, Fair Value Disclosure, Recurring	257,749	243,813
Liabilities Fair Value Disclosure [Abstract]
Other Liabilities, Fair Value Disclosure	52	241
Liabilities, Fair Value Disclosure, Recurring, Total	52	241
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Disclosure, Securities Available-for-Sale [Abstract]
Fair Value Disclosure, Agency Obligations	0	0
Fair Value Disclosure, Agency RMBS	0	0
Fair Value Disclosure, State and Political Subdivisions	0	0
Fair Value Disclosure, Securities Available-for-Sale, Total	0	0
Other Assets, Fair Value Disclosure	0	0
Assets, Fair Value Disclosure, Recurring	0	0
Liabilities Fair Value Disclosure [Abstract]
Other Liabilities, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure, Recurring, Total	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Disclosure, Securities Available-for-Sale [Abstract]
Fair Value Disclosure, Agency Obligations	53,062	45,471
Fair Value Disclosure, Agency RMBS	133,072	127,787
Fair Value Disclosure, State and Political Subdivisions	71,563	70,314
Fair Value Disclosure, Securities Available-for-Sale, Total	257,697	243,572
Other Assets, Fair Value Disclosure	52	241
Assets, Fair Value Disclosure, Recurring	257,749	243,813
Liabilities Fair Value Disclosure [Abstract]
Other Liabilities, Fair Value Disclosure	52	241
Liabilities, Fair Value Disclosure, Recurring, Total	52	241
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Disclosure, Securities Available-for-Sale [Abstract]
Fair Value Disclosure, Agency Obligations	0	0
Fair Value Disclosure, Agency RMBS	0	0
Fair Value Disclosure, State and Political Subdivisions	0	0
Fair Value Disclosure, Securities Available-for-Sale, Total	0	0
Other Assets, Fair Value Disclosure	0	0
Assets, Fair Value Disclosure, Recurring	0	0
Liabilities Fair Value Disclosure [Abstract]
Other Liabilities, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure, Recurring, Total	0	0
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Abstract]
Loans Held-for-sale, Fair Value Disclosure	1,922	1,497
Impaired Loans, Fair Value Disclosure	2,700	2,099
Other Real Esate Owned, Fair Value Disclosure	0	152
Servicing Asset at Fair Value, Amount	1,644	1,952
Assets, Fair Value Disclosure, Nonrecurring	6,266	5,700
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Abstract]
Loans Held-for-sale, Fair Value Disclosure	0	0
Impaired Loans, Fair Value Disclosure	0	0
Other Real Esate Owned, Fair Value Disclosure	0	0
Servicing Asset at Fair Value, Amount	0	0
Assets, Fair Value Disclosure, Nonrecurring	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Abstract]
Loans Held-for-sale, Fair Value Disclosure	1,922	1,497
Impaired Loans, Fair Value Disclosure	0	0
Other Real Esate Owned, Fair Value Disclosure	0	0
Servicing Asset at Fair Value, Amount	0	0
Assets, Fair Value Disclosure, Nonrecurring	1,922	1,497
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Abstract]
Loans Held-for-sale, Fair Value Disclosure	0	0
Impaired Loans, Fair Value Disclosure	2,700	2,099
Other Real Esate Owned, Fair Value Disclosure	0	152
Servicing Asset at Fair Value, Amount	1,644	1,952
Assets, Fair Value Disclosure, Nonrecurring	$ 4,344	$ 4,203

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Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122625-111746

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