Parent Company Only (Schedule of Condensed Cash Flow Statement) (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Net income	$ 5,172	$ 4,977	$ 252	$ 2,634	$ 2,714	$ 3,058	$ 3,002	$ 2,802	$ 2,847	$ 2,863	$ 2,768	$ 2,528	$ 13,035	$ 11,576	$ 11,006
Stock-based compensation expense													1,077	817	749
Deferred income tax (benefit) expense													(87)	341	1,019
Gain on sale of investment securities															(44)
Net cash provided by operating activities													296	25,786	13,650
Proceeds from sales of investment securities													123,459	10,952	13,514
Net cash acquired in acquisition													53,004
Net cash used in investing activities													(164,243)	(33,996)	(117,119)
Exercise of stock options															14
Withholdings to purchase capital stock													219	175	149
Cash paid in lieu of fractional shares													(4)
Net cash provided by financing activities													217,630	6,388	105,129
Net increase (decrease) in cash and cash equivalents													53,683	(1,822)	1,660
Cash and cash equivalents, beginning				15,663				17,485				15,825	15,663	17,485	15,825
Cash and cash equivalents, ending	69,346				15,663				17,485				69,346	15,663	17,485
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net income													13,035	11,576	11,006
Equity in earnings of subsidiary													(15,312)	(12,876)	(11,996)
Stock-based compensation expense													1,077	817	749
Deferred income tax (benefit) expense													(84)	2	(60)
Gain on sale of investment securities															(44)
Changes in other assets and liabilities, net													71	137	12
Net cash provided by operating activities													(1,213)	(344)	(333)
Dividends received from subsidiary													5,378	4,037	2,723
Proceeds from sales of investment securities															871
Operating dividend from subsidiary													1,129
Net cash acquired in acquisition													58
Net cash used in investing activities													6,565	4,037	3,594
Dividends paid, net of dividends reinvested													(5,378)	(4,037)	(3,397)
Exercise of stock options															14
Withholdings to purchase capital stock													219	175	149
Net cash provided by financing activities													(5,159)	(3,862)	(3,234)
Net increase (decrease) in cash and cash equivalents													193	(169)	27
Cash and cash equivalents, beginning				$ 63				$ 232				$ 205	63	232	205
Cash and cash equivalents, ending	$ 256				$ 63				$ 232				$ 256	$ 63	$ 232