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Regulatory Requirements and Restrictions - Trust Preferred Securities (Details) - Trust Preferred Securities Subject to Mandatory Redemption - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2007
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Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items] |  |  |
Securities issued |  |  | $ 25,000
Securities included in Tier One Capital | $ 25,000 | $ 25,000 |

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