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Securities - Summary of Activity in Allowance for Credit Losses for Held To Maturity Debt Securities (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | $ 2,026 | $ 0 | $ 0
Credit loss expense (benefit) | 56 | 1,900 | 0
Allowance for credit losses ending balance | 2,082 | 2,026 | 0
Cumulative Effect, Period of Adoption, Adjustment |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | $ 0 | 126 | 0
Allowance for credit losses ending balance |  | $ 0 | $ 126

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- Definition Amount, excluding accrued interest, of allowance for credit loss on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Amount of expense (reversal of expense) for expected credit loss on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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Balance Type: | debit
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Details
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Balance Type: |
Period Type: |