Loans and Allowance (Troubled Debts Restructured) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) loan	Dec. 31, 2018 USD ($) loan	Dec. 31, 2017 USD ($) loan
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
No. of Loans | loan		1
Pre-Modification Outstanding Recorded Balance		$ 26
Post-Modification Outstanding Recorded Balance		$ 30
Commercial Segment [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	1	1	1
Pre-Modification Outstanding Recorded Balance	$ 49	$ 60	$ 72
Post-Modification Outstanding Recorded Balance	$ 49	$ 61	$ 72
Consumer [Member] | First Mortgage [Member]
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	5	9	7
Pre-Modification Outstanding Recorded Balance	$ 131	$ 381	$ 320
Post-Modification Outstanding Recorded Balance	$ 134	$ 388	$ 324
Consumer [Member] | Second Mortgage [Member]
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	2	4	2
Pre-Modification Outstanding Recorded Balance	$ 33	$ 82	$ 16
Post-Modification Outstanding Recorded Balance	$ 33	$ 94	$ 16
Consumer [Member] | Automobile Loan [Member]
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	3	3
Pre-Modification Outstanding Recorded Balance	$ 25	$ 31
Post-Modification Outstanding Recorded Balance	$ 25	$ 30
Consumer [Member] | Boat/RVs [Member]
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	4	6
Pre-Modification Outstanding Recorded Balance	$ 316	$ 353
Post-Modification Outstanding Recorded Balance	$ 316	$ 348
Consumer [Member] | Other [Member]
Financing Receivable, Modifications [Line Items]
No. of Loans | loan	1	1
Pre-Modification Outstanding Recorded Balance	$ 10	$ 4
Post-Modification Outstanding Recorded Balance	$ 10	$ 4