Loans and Allowance for Loan Losses (Details 8) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	$ 12,259	$ 13,084	$ 13,019
Recognized interest income	640	733	637
Commercial [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	8,482	8,527	9,222
Recognized interest income	462	478	465
Commercial [Member] | Owner occupied RE [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	2,739	2,784	2,255
Recognized interest income	128	142	104
Commercial [Member] | Non-owner occupied RE [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	4,161	2,860	4,144
Recognized interest income	255	174	199
Commercial [Member] | Business [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	1,582	2,883	2,823
Recognized interest income	79	162	162
Commercial [Member] | Construction [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment
Recognized interest income
Consumer [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	3,777	4,557	3,797
Recognized interest income	178	255	172
Consumer [Member] | Other [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	153	174	174
Recognized interest income	5	5	6
Consumer [Member] | Construction [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment
Recognized interest income
Consumer [Member] | Real estate [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	2,771	2,930	2,047
Recognized interest income	131	151	69
Consumer [Member] | Home equity [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	853	1,453	1,576
Recognized interest income	$ 42	$ 99	$ 97