Loans and Allowance for Credit Losses (Allowance for Credit Losses on Financing Receivables) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Allowance for credit losses allocated to:
Beginning balance	$ 10,343	$ 9,781
Charge-offs	(1,097)	(1,511)
Recoveries	561	399
Net charge-offs	(536)	(1,112)
Provision	700	1,674
Ending balance	10,507	10,343
Commercial and Residential Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Allowance for credit losses allocated to:
Beginning balance	2,662	2,460
Charge-offs	(3)	(397)
Recoveries	18	43
Net charge-offs	15	(354)
Provision	(1,101)	556
Ending balance	1,576	2,662
Residential Portfolio Segment [Member]
Allowance for credit losses allocated to:
Beginning balance	2,353	2,284
Charge-offs	(646)	(406)
Recoveries	27	112
Net charge-offs	(619)	(294)
Provision	767	363
Ending balance	2,501	2,353
Commercial Real Estate Portfolio Segment [Member]
Allowance for credit losses allocated to:
Beginning balance	3,077	2,594
Charge-offs		(240)
Recoveries	206	29
Net charge-offs	206	(211)
Provision	749	694
Ending balance	4,032	3,077
Commercial Portfolio Segment [Member]
Allowance for credit losses allocated to:
Beginning balance	1,949	2,241
Charge-offs	(411)	(441)
Recoveries	306	203
Net charge-offs	(105)	(238)
Provision	85	(54)
Ending balance	1,929	1,949
Consumer Portfolio Segment [Member]
Allowance for credit losses allocated to:
Beginning balance	302	202
Charge-offs	(37)	(27)
Recoveries	4	12
Net charge-offs	(33)	(15)
Provision	200	115
Ending balance	$ 469	$ 302