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Investment Securities (Narrative) (Details) - USD ($) | Mar. 31, 2022 | Dec. 31, 2021
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Schedule of Investments [Line Items] |  |
Available-for-sale Securities Pledged as Collateral | $ 339,665,000 | $ 244,763,000
Debt Securities, Available-for-sale, Restriction Type [Extensible List] | us-gaap:CollateralPledgedMember | us-gaap:CollateralPledgedMember
FHLB [Member] |  |
Schedule of Investments [Line Items] |  |
Letter of credit outstanding, amount | $ 301,450,000 | $ 450,850,000

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