Quarterly Financial Information (Schedule of Quarterly Financial Information) (Details) - USD ($) $ / shares in Units, $ 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
Quarterly Financial Information [Abstract]
Interest income	$ 13,836	$ 13,699	$ 12,250	$ 9,711	$ 9,949	$ 10,008	$ 9,657	$ 9,655	$ 9,624	$ 9,028	$ 8,535	$ 8,143	$ 49,496	$ 39,269	$ 35,330
Interest expense	(1,014)	(1,163)	(1,429)	(1,705)	(1,938)	(2,008)	(1,863)	(1,745)	(1,660)	(1,317)	(1,012)	(884)	(5,311)	(7,554)	(4,873)
Net interest income	12,822	12,536	10,821	8,006	8,011	8,000	7,794	7,910	7,964	7,711	7,523	7,259	44,185	31,715	30,457
Provision for loan losses	(1,550)	(1,500)	(1,900)	(300)	(255)	(320)	(255)	(255)	(325)	(400)	(425)	(300)	(5,250)	(1,085)	(1,450)
Gain (loss) on write-down/sale of investment securities	115				20	(2)		(4)		5	107	(58)	115	14	54
Other income	4,720	4,370	2,708	2,755	2,595	2,634	2,489	2,461	2,263	2,278	2,264	2,341	14,553	10,179	9,146
Other expenses	(10,230)	(9,474)	(11,311)	(7,304)	(7,073)	(6,643)	(6,435)	(6,770)	(6,530)	(6,172)	(6,162)	(6,208)	(38,319)	(26,921)	(25,072)
Income before taxes	5,877	5,932	318	3,157	3,298	3,669	3,593	3,342	3,372	3,422	3,307	3,034	15,284	13,902	13,135
Provision for income taxes	(705)	(955)	(66)	(523)	(584)	(611)	(591)	(540)	(525)	(559)	(539)	(506)	(2,249)	(2,326)	(2,129)
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
Net income per share - basic	$ 1.04	$ 1.00	$ 0.05	$ 0.69	$ 0.71	$ 0.82	$ 0.79	$ 0.74	$ 0.76	$ 0.76	$ 0.74	$ 0.67	$ 2.84	$ 3.06	$ 2.93
Net income per share - diluted	$ 1.03	$ 0.99	$ 0.05	$ 0.69	$ 0.71	$ 0.80	$ 0.79	$ 0.73	$ 0.75	$ 0.75	$ 0.73	$ 0.67	$ 2.82	$ 3.03	$ 2.90