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Investment Securities - Allowance for credit losses of availabel for sale securities by major security type (Details) - USD ($) | 3 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward] |  |
Beginning Balance | $ 926,000 |
Charge-Offs | (491,000) |
Provisions (Recovery) | (319,000) | $ (926,000)
Ending Balance | 116,000 | 926,000
Corporate bonds |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward] |  |
Beginning Balance | 926,000 |
Charge-Offs | (491,000) |
Provisions (Recovery) | (319,000) | (926,000)
Ending Balance | $ 116,000 | $ 926,000

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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 excluding accrued interest, of 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). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479130/326-30-45-1 + Details
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Period Type: | instant

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- Definition Amount, excluding accrued interest, of decrease in 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) from writeoff. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-9 + Details
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- Definition Amount, excluding accrued interest, of reversal of credit loss expense on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) transferred out of available-for-sale into investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 8B -Publisher FASB -URI https://asc.fasb.org//1943274/2147481830/320-10-45-8B + Details
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- Details
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