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Allowance for Credit Losses (Narratives) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
Receivables [Abstract] |  |
Historical loss rate | 1.00% |
Available for sale securities, accrued interest receivable |  | $ 1.7

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