Fair Value Measurements (Estimated Fair Values of Financial Assets and Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Financial assets, Estimated Fair Value
Investment securities held to maturity	$ 8,718	$ 8,654
Fair Value, Inputs, Level 1 [Member] | Carrying Amount [Member]
Financial assets, Estimated Fair Value
Cash and cash equivalents	96,251	94,971
Fair Value, Inputs, Level 1 [Member] | Estimated Fair Value [Member]
Financial assets, Estimated Fair Value
Cash and cash equivalents	96,251	94,971
Fair Value, Inputs, Level 2 [Member] | Carrying Amount [Member]
Financial assets, Estimated Fair Value
Investment securities held to maturity	8,687	8,786
Restricted securities	4,263	4,190
Cash surrender value on life insurance	30,027	29,770
Financial liabilities, Estimated Fair Value
Noninterest-bearing demand	355,054	356,618
Checking plus interest	296,421	302,227
Money market	268,355	262,050
Savings	146,202	143,322
Club	774	387
Certificates of deposit, $100,000 or more	131,003	127,600
Other time	150,985	149,130
Short-term borrowings	2,162	1,226
Long-term borrowings	15,000	15,000
Fair Value, Inputs, Level 2 [Member] | Estimated Fair Value [Member]
Financial assets, Estimated Fair Value
Investment securities held to maturity	8,718	8,654
Restricted securities	4,263	4,190
Cash surrender value on life insurance	30,027	29,770
Financial liabilities, Estimated Fair Value
Noninterest-bearing demand	355,054	356,618
Checking plus interest	296,421	302,227
Money market	268,355	262,050
Savings	146,202	143,322
Club	774	387
Certificates of deposit, $100,000 or more	133,113	128,167
Other time	152,240	149,209
Short-term borrowings	2,162	1,226
Long-term borrowings	15,005	15,040
Fair Value, Inputs, Level 3 [Member] | Carrying Amount [Member]
Financial assets, Estimated Fair Value
Loans, net	1,266,615	1,238,147
Fair Value, Inputs, Level 3 [Member] | Estimated Fair Value [Member]
Financial assets, Estimated Fair Value
Loans, net	$ 1,250,797	$ 1,242,867