Loans and Allowance For Credit Losses Loans (Summary of Analysis Of Allowance For Loan Losses Prior To ASC 326 (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses	$ 24,608	$ 13,074	$ 13,047
Financing Receivable, Allowance for Credit Losses, Write-downs	698	2,103
Financing Receivable, Allowance for Credit Losses, Recovery	197	580
Provision for Loan, Lease, and Other Losses	4,699	1,550
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses	2,441	1,221	1,705
Financing Receivable, Allowance for Credit Losses, Write-downs	25	281
Financing Receivable, Allowance for Credit Losses, Recovery	7	17
Provision for Loan, Lease, and Other Losses	174	(295)
Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses			2,214
Financing Receivable, Allowance for Credit Losses, Write-downs		2
Financing Receivable, Allowance for Credit Losses, Recovery		21
Provision for Loan, Lease, and Other Losses		467
Non Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses			5,742
Financing Receivable, Allowance for Credit Losses, Write-downs		170
Financing Receivable, Allowance for Credit Losses, Recovery		1
Provision for Loan, Lease, and Other Losses		366
Land and Land Improvements [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses	4,120	600	339
Financing Receivable, Allowance for Credit Losses, Write-downs	3	2
Financing Receivable, Allowance for Credit Losses, Recovery	3	108
Provision for Loan, Lease, and Other Losses	1,273	155
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses	1,678	242	64
Financing Receivable, Allowance for Credit Losses, Write-downs	0	0
Financing Receivable, Allowance for Credit Losses, Recovery	0	0
Provision for Loan, Lease, and Other Losses	440	178
Non-Jumbo [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses			2,090
Financing Receivable, Allowance for Credit Losses, Write-downs		979
Financing Receivable, Allowance for Credit Losses, Recovery		125
Provision for Loan, Lease, and Other Losses		576
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses			379
Financing Receivable, Allowance for Credit Losses, Write-downs		0
Financing Receivable, Allowance for Credit Losses, Recovery		0
Provision for Loan, Lease, and Other Losses		(368)
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses	487	138	167
Financing Receivable, Allowance for Credit Losses, Write-downs	23	24
Financing Receivable, Allowance for Credit Losses, Recovery	2	19
Provision for Loan, Lease, and Other Losses	62	(24)
Mortgage Warehouse Lines [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses	0	0	0
Financing Receivable, Allowance for Credit Losses, Write-downs	0	0
Financing Receivable, Allowance for Credit Losses, Recovery	0	0
Provision for Loan, Lease, and Other Losses	0	0
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses	240	379	79
Financing Receivable, Allowance for Credit Losses, Write-downs	118	285
Financing Receivable, Allowance for Credit Losses, Recovery	38	168
Provision for Loan, Lease, and Other Losses	$ 179	173
Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses			$ 268
Financing Receivable, Allowance for Credit Losses, Write-downs		360
Financing Receivable, Allowance for Credit Losses, Recovery		121
Provision for Loan, Lease, and Other Losses		322
Accounting Standards Update 2016-13 [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses		13,074
Accounting Standards Update 2016-13 [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses		1,146
Accounting Standards Update 2016-13 [Member] | Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses		2,700
Accounting Standards Update 2016-13 [Member] | Non Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses		5,939
Accounting Standards Update 2016-13 [Member] | Land and Land Improvements [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses		600
Accounting Standards Update 2016-13 [Member] | Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses		242
Accounting Standards Update 2016-13 [Member] | Non-Jumbo [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses		1,812
Accounting Standards Update 2016-13 [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses		11
Accounting Standards Update 2016-13 [Member] | Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses		138
Accounting Standards Update 2016-13 [Member] | Mortgage Warehouse Lines [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses		0
Accounting Standards Update 2016-13 [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses		135
Accounting Standards Update 2016-13 [Member] | Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses		$ 351