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Securities - Additional Information (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2013
Investment [Line Items] |  |  |
Available-for-sale securities transferred to held-to-maturity securities |  | $ 12,700,000 | $ 536,000,000
Unrealized net loss on securities reclassified from available-for-sale to held-to-maturity, Gross |  | (209,000) | $ (13,300,000)
Debt securities, available-for-sale, realized gain (loss) | $ (108,000) | 0 |
Equity investments | 102,037,000 | $ 101,155,000 |
Corporate debt securities |  |  |
Investment [Line Items] |  |  |
Amortized cost | 62,900,000 |  |
Fair value | 58,800,000 |  |
State, municipal and sovereign debt obligations |  |  |
Investment [Line Items] |  |  |
Amortized cost | 83,200,000 |  |
Fair value | 78,200,000 |  |
Asset-backed securities |  |  |
Investment [Line Items] |  |  |
Amortized cost | 296,200,000 |  |
Fair value | $ 276,900,000 |  |

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- Definition Other Comprehensive Income Reclassification Adjustment For Held To Maturity Transferred From Available For Sale Securities Before Tax + References No definition available. + Details
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- Definition Amortized cost, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity) and 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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27232-111563 + Details
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- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity) and 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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=SL120269820-111563 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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