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Risks and Uncertainties (Summary Of Loans That Remain In Forbearance) (Details) $ in Thousands	Dec. 31, 2020 USD ($) loan
Risks And Uncertainties [Line Items]
Number Of Remaining Loans In Forbearance | loan	314
Loans Remaining In Forbearance | $	$ 55,646
Residential Real Estate Loans [Member]
Risks And Uncertainties [Line Items]
Number Of Remaining Loans In Forbearance | loan	14
Loans Remaining In Forbearance | $	$ 2,163
Commercial Real Estate Loans [Member]
Risks And Uncertainties [Line Items]
Number Of Remaining Loans In Forbearance | loan	67
Loans Remaining In Forbearance | $	$ 39,925
Agricultural Real Estate Loans [Member]
Risks And Uncertainties [Line Items]
Number Of Remaining Loans In Forbearance | loan	2
Loans Remaining In Forbearance | $	$ 428
Construction Real Estate Loans [Member]
Risks And Uncertainties [Line Items]
Number Of Remaining Loans In Forbearance | loan	3
Loans Remaining In Forbearance | $	$ 7,240
Commercial [Member]
Risks And Uncertainties [Line Items]
Number Of Remaining Loans In Forbearance | loan	47
Loans Remaining In Forbearance | $	$ 3,773
Consumer Loans To Individuals [Member]
Risks And Uncertainties [Line Items]
Number Of Remaining Loans In Forbearance | loan	88
Loans Remaining In Forbearance | $	$ 2,117

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