Fair Value Measurements (Estimated Fair Values of Financial Assets and Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financial assets, Estimated Fair Value
Investment securities held to maturity	$ 11,715	$ 8,654
Fair Value, Inputs, Level 1 [Member] | Carrying Amount [Member]
Financial assets, Estimated Fair Value
Cash and cash equivalents	126,284	94,971
Fair Value, Inputs, Level 1 [Member] | Estimated Fair Value [Member]
Financial assets, Estimated Fair Value
Cash and cash equivalents	126,284	94,971
Fair Value, Inputs, Level 2 [Member] | Carrying Amount [Member]
Financial assets, Estimated Fair Value
Investment securities held to maturity	11,710	8,786
Restricted securities	3,626	4,190
Cash surrender value on life insurance	30,430	29,782
Financial liabilities, Estimated Fair Value
Noninterest-bearing demand	442,996	356,618
Checking plus interest	344,940	302,227
Money market	274,783	262,050
Savings	163,320	143,322
Club	1,155	387
Certificates of deposit, $100,000 or more	129,467	127,600
Other time	148,067	149,130
Short-term borrowings	1,064	1,226
Long-term borrowings		15,000
Fair Value, Inputs, Level 2 [Member] | Estimated Fair Value [Member]
Financial assets, Estimated Fair Value
Investment securities held to maturity	11,715	8,654
Restricted securities	3,626	4,190
Cash surrender value on life insurance	30,430	29,782
Financial liabilities, Estimated Fair Value
Noninterest-bearing demand	442,996	356,618
Checking plus interest	344,940	302,227
Money market	274,783	262,050
Savings	163,320	143,322
Club	1,155	387
Certificates of deposit, $100,000 or more	132,577	128,167
Other time	152,358	149,209
Short-term borrowings	1,064	1,226
Long-term borrowings		15,040
Fair Value, Inputs, Level 3 [Member] | Carrying Amount [Member]
Financial assets, Estimated Fair Value
Loans, net	1,396,159	1,238,147
Fair Value, Inputs, Level 3 [Member] | Estimated Fair Value [Member]
Financial assets, Estimated Fair Value
Loans, net	$ 1,394,326	$ 1,242,867