Loans and Allowance For Credit Losses Loans (Summary Of Analysis Of Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	$ 29,354	$ 13,074	$ 13,047
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	410
Provision for Loan, Lease, and Other Losses	10,408	1,550
Financing Receivable, Allowance for Credit Loss, Writeoff	(2,175)	(2,103)
Financing Receivable, Allowance for Credit Loss, Recovery	711	580
Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	2,875	1,221	1,705
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0
Provision for Loan, Lease, and Other Losses	662	(295)
Financing Receivable, Allowance for Credit Loss, Writeoff	(99)	(281)
Financing Receivable, Allowance for Credit Loss, Recovery	27	17
Commercial real estate owner occupied professional & medical [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	872	1,058
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0
Provision for Loan, Lease, and Other Losses	1,209
Financing Receivable, Allowance for Credit Loss, Writeoff	(1,005)
Financing Receivable, Allowance for Credit Loss, Recovery	0
Commercial real estate owner occupied retail [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	3,148	820
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	153
Provision for Loan, Lease, and Other Losses	2,285
Financing Receivable, Allowance for Credit Loss, Writeoff	0
Financing Receivable, Allowance for Credit Loss, Recovery	162
Commercial real estate owner occupied other [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	678	821
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0
Provision for Loan, Lease, and Other Losses	(6)
Financing Receivable, Allowance for Credit Loss, Writeoff	0
Financing Receivable, Allowance for Credit Loss, Recovery	0
Commercial real estate non-owner occupied hotels & motels [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	2,132	1,235
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0
Provision for Loan, Lease, and Other Losses	1,833
Financing Receivable, Allowance for Credit Loss, Writeoff	0
Financing Receivable, Allowance for Credit Loss, Recovery	0
Commercial real estate non-owner occupied mini-storage [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	232	485
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0
Provision for Loan, Lease, and Other Losses	58
Financing Receivable, Allowance for Credit Loss, Writeoff	0
Financing Receivable, Allowance for Credit Loss, Recovery	0
Multifamily [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	680	1,534
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0
Provision for Loan, Lease, and Other Losses	(900)
Financing Receivable, Allowance for Credit Loss, Writeoff	0
Financing Receivable, Allowance for Credit Loss, Recovery	38
Commercial real estate non-owner occupied retail [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	1,305	964
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0
Provision for Loan, Lease, and Other Losses	403
Financing Receivable, Allowance for Credit Loss, Writeoff	(343)
Financing Receivable, Allowance for Credit Loss, Recovery	2
Commercial real estate non-owner occupied other [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	927	1,721
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0
Provision for Loan, Lease, and Other Losses	600
Financing Receivable, Allowance for Credit Loss, Writeoff	0
Financing Receivable, Allowance for Credit Loss, Recovery	0
Land and Land Improvements [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	4,216	600	339
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	111
Provision for Loan, Lease, and Other Losses	1,334	155
Financing Receivable, Allowance for Credit Loss, Writeoff	(4)	(2)
Financing Receivable, Allowance for Credit Loss, Recovery	39	108
Construction [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	3,388	242	64
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0
Provision for Loan, Lease, and Other Losses	2,150	178
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0
Financing Receivable, Allowance for Credit Loss, Recovery	0	0
Residential 1-4 family real estate personal residence [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	2,672	1,275
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	146
Provision for Loan, Lease, and Other Losses	(35)
Financing Receivable, Allowance for Credit Loss, Writeoff	(45)
Financing Receivable, Allowance for Credit Loss, Recovery	49
Residential 1-4 family real estate rental - small loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	2,272	532
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0
Provision for Loan, Lease, and Other Losses	283
Financing Receivable, Allowance for Credit Loss, Writeoff	(123)
Financing Receivable, Allowance for Credit Loss, Recovery	127
Residential 1-4 family real estate rental - large loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	2,616	49
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0
Provision for Loan, Lease, and Other Losses	(317)
Financing Receivable, Allowance for Credit Loss, Writeoff	0
Financing Receivable, Allowance for Credit Loss, Recovery	0
Home Equity [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	961	138	167
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0
Provision for Loan, Lease, and Other Losses	499	(24)
Financing Receivable, Allowance for Credit Loss, Writeoff	(23)	(24)
Financing Receivable, Allowance for Credit Loss, Recovery	39	19
Mortgage Warehouse Lines [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	0	0	0
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0
Provision for Loan, Lease, and Other Losses	0	0
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0
Financing Receivable, Allowance for Credit Loss, Recovery	0	0
Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	224	379	$ 79
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0
Provision for Loan, Lease, and Other Losses	194	173
Financing Receivable, Allowance for Credit Loss, Writeoff	(212)	(285)
Financing Receivable, Allowance for Credit Loss, Recovery	101	168
Credit Card Receivable [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	16	0
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0
Provision for Loan, Lease, and Other Losses	28
Financing Receivable, Allowance for Credit Loss, Writeoff	(33)
Financing Receivable, Allowance for Credit Loss, Recovery	9
Bank Overdrafts [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	140	$ 0
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0
Provision for Loan, Lease, and Other Losses	128
Financing Receivable, Allowance for Credit Loss, Writeoff	(288)
Financing Receivable, Allowance for Credit Loss, Recovery	118
Cumulative Effect, Period of Adoption, Adjustment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	6,926
Cumulative Effect, Period of Adoption, Adjustment [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	1,064
Cumulative Effect, Period of Adoption, Adjustment [Member] | Commercial real estate owner occupied professional & medical [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(390)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Commercial real estate owner occupied retail [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(272)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Commercial real estate owner occupied other [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(137)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Commercial real estate non-owner occupied hotels & motels [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(936)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Commercial real estate non-owner occupied mini-storage [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(311)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Multifamily [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	8
Cumulative Effect, Period of Adoption, Adjustment [Member] | Commercial real estate non-owner occupied retail [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	279
Cumulative Effect, Period of Adoption, Adjustment [Member] | Commercial real estate non-owner occupied other [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(1,394)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Land and Land Improvements [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	2,136
Cumulative Effect, Period of Adoption, Adjustment [Member] | Construction [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	996
Cumulative Effect, Period of Adoption, Adjustment [Member] | Residential 1-4 family real estate personal residence [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	1,282
Cumulative Effect, Period of Adoption, Adjustment [Member] | Residential 1-4 family real estate rental - small loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	1,453
Cumulative Effect, Period of Adoption, Adjustment [Member] | Residential 1-4 family real estate rental - large loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	2,884
Cumulative Effect, Period of Adoption, Adjustment [Member] | Home Equity [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	308
Cumulative Effect, Period of Adoption, Adjustment [Member] | Mortgage Warehouse Lines [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0
Cumulative Effect, Period of Adoption, Adjustment [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(238)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Credit Card Receivable [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	12
Cumulative Effect, Period of Adoption, Adjustment [Member] | Bank Overdrafts [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	$ 182