Fair Value Measurements (Estimated Fair Values of Financial Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financial assets, Estimated Fair Value
Investment securities held to maturity	$ 8,654	$ 6,000
Fair Value, Inputs, Level 1 [Member] | Carrying Amount [Member]
Financial assets, Estimated Fair Value
Cash and cash equivalents	94,971	67,225
Fair Value, Inputs, Level 1 [Member] | Estimated Fair Value [Member]
Financial assets, Estimated Fair Value
Cash and cash equivalents	94,971	67,225
Fair Value, Inputs, Level 2 [Member] | Carrying Amount [Member]
Financial assets, Estimated Fair Value
Investment securities held to maturity	8,786	6,043
Restricted securities	4,190	6,476
Cash surrender value on life insurance	29,770	3,726
Financial liabilities, Estimated Fair Value
Noninterest-bearing demand	356,618	330,466
Checking plus interest	302,227	239,809
Money market	262,050	232,613
Savings	143,322	148,723
Club	387	387
Bank Deposits		22,084
Certificates of deposit, $100,000 or more	127,600	97,905
Other time	149,130	140,354
Short-term borrowings	1,226	60,812
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	8,654	6,000
Restricted securities	4,190	6,476
Cash surrender value on life insurance	29,770	3,726
Financial liabilities, Estimated Fair Value
Noninterest-bearing demand	356,618	330,466
Checking plus interest	302,227	239,809
Money market	262,050	232,613
Savings	143,322	148,723
Club	387	387
Bank Deposits		22,075
Certificates of deposit, $100,000 or more	128,167	96,435
Other time	149,209	136,292
Short-term borrowings	1,226	60,812
Long-term borrowings	15,040	15,012
Fair Value, Inputs, Level 3 [Member] | Carrying Amount [Member]
Financial assets, Estimated Fair Value
Loans, net	1,238,147	1,185,012
Fair Value, Inputs, Level 3 [Member] | Estimated Fair Value [Member]
Financial assets, Estimated Fair Value
Loans, net	$ 1,242,867	$ 1,150,418