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Investments - AFS Allowance for Credit Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Mar. 31, 2022 | Dec. 31, 2021
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward] |  |
Expected credit loss on available-for-sale debt securities at beginning of period | $ 489 | $ 186
Provision for (or reversal of) credit loss expense | 83 | 303
Expected credit loss on available-for-sale debt securities at end of period | 572 | 489
Corporate Bonds |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward] |  |
Expected credit loss on available-for-sale debt securities at beginning of period | 371 | 148
Provision for (or reversal of) credit loss expense | 85 | 223
Expected credit loss on available-for-sale debt securities at end of period | 456 | 371
Municipal Bonds |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward] |  |
Expected credit loss on available-for-sale debt securities at beginning of period | 1 | 0
Provision for (or reversal of) credit loss expense | (1) | 1
Expected credit loss on available-for-sale debt securities at end of period | 0 | 1
Redeemable preferred stock |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward] |  |
Expected credit loss on available-for-sale debt securities at beginning of period | 117 | 38
Provision for (or reversal of) credit loss expense | (1) | 79
Expected credit loss on available-for-sale debt securities at end of period | $ 116 | $ 117

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- Definition Amount 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 -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aaa) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
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- Definition Amount of increase (decrease) in allowance for credit loss of 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 326 -SubTopic 30 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 + 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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- Details
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