Loans And Allowance for Credit Losses (Collateral-Dependent Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Credit Quality Indicator [Line Items]
Collateral Dependent Loans, Amortized Cost	$ 3,180	$ 4,398
Business Assets
Credit Quality Indicator [Line Items]
Collateral Dependent Loans, Amortized Cost	0	1,183
Real Estate
Credit Quality Indicator [Line Items]
Collateral Dependent Loans, Amortized Cost	3,180	1,977
Oil & Gas Assets
Credit Quality Indicator [Line Items]
Collateral Dependent Loans, Amortized Cost	0	1,238
Commercial Portfolio Segment [Member] | Business
Credit Quality Indicator [Line Items]
Collateral Dependent Loans, Amortized Cost		2,421
Commercial Portfolio Segment [Member] | Real estate - business
Credit Quality Indicator [Line Items]
Collateral Dependent Loans, Amortized Cost	1,203
Commercial Portfolio Segment [Member] | Business Assets | Business
Credit Quality Indicator [Line Items]
Collateral Dependent Loans, Amortized Cost		1,183
Commercial Portfolio Segment [Member] | Business Assets | Real estate - business
Credit Quality Indicator [Line Items]
Collateral Dependent Loans, Amortized Cost	0
Commercial Portfolio Segment [Member] | Real Estate | Business
Credit Quality Indicator [Line Items]
Collateral Dependent Loans, Amortized Cost		0
Commercial Portfolio Segment [Member] | Real Estate | Real estate - business
Credit Quality Indicator [Line Items]
Collateral Dependent Loans, Amortized Cost	1,203
Commercial Portfolio Segment [Member] | Oil & Gas Assets | Business
Credit Quality Indicator [Line Items]
Collateral Dependent Loans, Amortized Cost		1,238
Commercial Portfolio Segment [Member] | Oil & Gas Assets | Real estate - business
Credit Quality Indicator [Line Items]
Collateral Dependent Loans, Amortized Cost	0
Personal Banking Portfolio Segment [Member] | Revolving home equity
Credit Quality Indicator [Line Items]
Collateral Dependent Loans, Amortized Cost	1,977	1,977
Personal Banking Portfolio Segment [Member] | Business Assets | Revolving home equity
Credit Quality Indicator [Line Items]
Collateral Dependent Loans, Amortized Cost	0	0
Personal Banking Portfolio Segment [Member] | Real Estate | Revolving home equity
Credit Quality Indicator [Line Items]
Collateral Dependent Loans, Amortized Cost	1,977	1,977
Personal Banking Portfolio Segment [Member] | Oil & Gas Assets | Revolving home equity
Credit Quality Indicator [Line Items]
Collateral Dependent Loans, Amortized Cost	$ 0	$ 0