Fair Value Measurements (Estimated Fair Values of Financial Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financial assets, Estimated Fair Value
Investment securities held to maturity	$ 65,828	$ 8,654
Fair Value, Inputs, Level 1 [Member] | Carrying Amount [Member]
Financial assets, Estimated Fair Value
Cash and cash equivalents	186,917	94,971
Fair Value, Inputs, Level 1 [Member] | Estimated Fair Value [Member]
Financial assets, Estimated Fair Value
Cash and cash equivalents	186,917	94,971
Fair Value, Inputs, Level 2 [Member] | Carrying Amount [Member]
Financial assets, Estimated Fair Value
Investment securities held to maturity	65,706	8,786
Restricted securities	3,626	4,190
Cash surrender value on life insurance	31,018	29,782
Financial liabilities, Estimated Fair Value
Noninterest-bearing demand	509,091	356,618
Checking plus interest	446,243	302,227
Money market	292,974	262,050
Savings	177,524	143,322
Club	392	387
Certificates of deposit, $100,000 or more	129,623	127,600
Other time	144,858	149,130
Securities sold under retail repurchase agreement	1,050	1,226
Advances from FHLB - long-term		15,000
Subordinated debt	24,429
Fair Value, Inputs, Level 2 [Member] | Estimated Fair Value [Member]
Financial assets, Estimated Fair Value
Investment securities held to maturity	65,828	8,654
Restricted securities	3,626	4,190
Cash surrender value on life insurance	31,018	29,782
Financial liabilities, Estimated Fair Value
Noninterest-bearing demand	509,091	356,618
Checking plus interest	446,243	302,227
Money market	292,974	262,050
Savings	177,524	143,322
Club	392	387
Certificates of deposit, $100,000 or more	131,271	128,167
Other time	146,137	149,209
Securities sold under retail repurchase agreement	1,050	1,226
Advances from FHLB - long-term		15,040
Subordinated debt	25,745
Fair Value, Inputs, Level 3 [Member] | Carrying Amount [Member]
Financial assets, Estimated Fair Value
Loans, net	1,440,368	1,238,147
Fair Value, Inputs, Level 3 [Member] | Estimated Fair Value [Member]
Financial assets, Estimated Fair Value
Loans, net	$ 1,436,292	$ 1,242,867