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Investment Securities - Allowance for Credit Losses HTM (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | $ 1,279 | $ 2,915 |
Provision for credit loss expense | 0 | (1,183) | $ 2,546
Net decrease in allowance on previously impaired securities | 0 | (301) |
Net increase (decrease) in allowance on previously impaired securities |  | (600) |
Recoveries | 109 | 147 |
Ending balance | 1,388 | 1,279 | 2,915
State and political subdivisions |  |  |
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 1,197 | 2,307 |
Provision for credit loss expense | 0 | (1,110) |
Net decrease in allowance on previously impaired securities | (1,180) | (217) |
Net increase (decrease) in allowance on previously impaired securities |  | 0 |
Recoveries | 93 | 0 |
Ending balance | 110 | 1,197 | 2,307
Other securities |  |  |
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 82 | 608 |
Provision for credit loss expense | 0 | (73) |
Net decrease in allowance on previously impaired securities | 1,180 | (84) |
Net increase (decrease) in allowance on previously impaired securities |  | (600) |
Recoveries | 16 | 147 |
Ending balance | $ 1,278 | $ 82 | $ 608

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- Definition Amount of expense (reversal of expense) for allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), not intended to be sold and not more likely than not will be required to sell before recovery of amortized cost basis, with previously recorded allowance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 + Details
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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 https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
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- Definition Amount of increase in allowance for credit loss on investment in debt security measured at amortized cost (held-to-maturity), from recovery. + 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 (e) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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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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- Definition Amount of writeoff of investment in debt security, measured at amortized cost (held-to-maturity), charged against allowance for credit loss. + 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 (d) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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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 https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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