Loans and Allowance for Loan Losses (Average Recorded Investment and Interest Income Recognized on Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	$ 15,185	$ 13,238	$ 15,064	$ 13,551	$ 12,259
Recognized interest income	237	177	478	542	640
Commercial Loan [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	9,443	8,543	9,647	8,647	8,482
Recognized interest income	156	115	338	359	462
Commercial Loan [Member] | Owner Occupied Re [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	2,985	2,728	2,617	2,742	2,739
Recognized interest income	40	27	73	96	128
Commercial Loan [Member] | Non Owner Occupied Re [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	3,880	4,077	4,724	4,139	4,161
Recognized interest income	63	74	165	202	255
Commercial Loan [Member] | Business Loan [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	2,506	1,738	2,270	1,766	1,582
Recognized interest income	51	14	98	61	79
Commercial Loan [Member] | Construction Loans [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	72		36
Recognized interest income	2		2
Consumer Loan [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	5,742	4,695	5,417	4,904	3,777
Recognized interest income	81	62	140	183	178
Consumer Loan [Member] | Other Consumer [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	139	151	143	154	153
Recognized interest income	1	2	3	4	5
Consumer Loan [Member] | Construction Loans [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment
Recognized interest income
Consumer Loan [Member] | Real Estate Loan [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	3,063	2,876	3,207	3,062	2,771
Recognized interest income	58	30	98	97	131
Consumer Loan [Member] | Home Equity Loan [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	2,540	1,668	2,067	1,688	853
Recognized interest income	$ 22	$ 30	$ 39	$ 82	$ 42