Quarterly Results of Operations (Schedule of Quarterly Financial Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	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, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Results of Operations [Abstract]
Interest Income	$ 20,892	$ 21,617	$ 21,518	$ 21,302	$ 21,489	$ 20,836	$ 20,621	$ 16,748	$ 15,081	$ 15,026	$ 14,652	$ 14,109	$ 85,329	$ 79,694	$ 58,868
Interest Expense	4,926	5,372	5,474	5,260	4,995	4,419	4,013	3,164	2,888	2,762	2,565	2,396	21,032	16,591	10,611
Net Interest Income	15,966	16,245	16,044	16,042	16,494	16,417	16,608	13,584	12,193	12,264	12,087	11,713	64,297	63,103	48,257
Provision for loan losses	575	425	475	475	600	570	500	450	350	370	300	200	1,950	2,120	1,220
Net Income Available to Common Shareholders	$ 6,628	$ 6,134	$ 5,751	$ 5,238	$ 5,290	$ 5,402	$ 4,165	$ 4,007	$ 1,460	$ 3,751	$ 3,898	$ 3,206	$ 23,751	$ 18,864	$ 12,315
Earnings per share, basic	$ 0.77	$ 0.72	$ 0.67	$ 0.61	$ 0.62	$ 0.63	$ 0.49	$ 0.51	$ 0.20	$ 0.51	$ 0.53	$ 0.44	$ 2.77	$ 2.25	$ 1.67
Earnings per share, diluted	$ 0.77	$ 0.71	$ 0.66	$ 0.60	$ 0.61	$ 0.62	$ 0.48	$ 0.50	$ 0.19	$ 0.50	$ 0.52	$ 0.43	$ 2.74	$ 2.21	$ 1.64