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Allowance for Credit Losses and Allowance for Unfunded Commitments and Letters of Credit (Changes in the Allowance for Unfunded Commitments and Letters of Credit) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Schedule of Allowance for Unfunded Commitments and Letters of Credit [Line Items]        
Allowance For Unfunded Loan Commitments And Letters Of Credit $ 9,000 $ 9,800 $ 8,500 $ 8,300
Allowance for Loan and Lease Losses, Net Changes In Unfunded Commitments and Letters Of Credit Allowance $ 500 $ 1,500