Loans and Allowance For Credit Losses Loans (Schedule of Defaults During Stated Period Of Trouble Debt Restructurings) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($) contract	Jun. 30, 2019 USD ($) contract	Jun. 30, 2020 USD ($) contract	Jun. 30, 2019 USD ($) contract
Financing Receivable, Impaired [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contract	1	5	1	5
Financing Receivable, Troubled Debt Restructuring, Subsequent Default | $	$ 361	$ 319	$ 361	$ 319
Commercial real estate owner occupied other [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contract	1	0	1	0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default | $	$ 361	$ 0	$ 361	$ 0
Commercial real estate non-owner occupied other [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contract	0	1	0	1
Financing Receivable, Troubled Debt Restructuring, Subsequent Default | $	$ 0	$ 126	$ 0	$ 126
Residential 1-4 family real estate personal residence [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contract	0	1	0	1
Financing Receivable, Troubled Debt Restructuring, Subsequent Default | $	$ 0	$ 47	$ 0	$ 47
Residential 1-4 family real estate rental - small loan [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contract	0	3	0	3
Financing Receivable, Troubled Debt Restructuring, Subsequent Default | $	$ 0	$ 146	$ 0	$ 146