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Investments - Schedule of the Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Beginning balance			$ (245)	$ 0
(Increase) in allowance for credit losses			(113)	(135)
Reduction in credit losses due to AFS securities sold during the year				4
Gains from recoveries of amounts previously written off			72	47
Ending balance	$ (286)	$ (84)	(286)	(84)
Net gains from recoveries (credit losses) on AFS securities	35	(1)	(41)	(84)
Obligations of state and political subdivisions
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Beginning balance			0	0
(Increase) in allowance for credit losses			(3)	0
Reduction in credit losses due to AFS securities sold during the year				0
Gains from recoveries of amounts previously written off			0	0
Ending balance	(3)	0	(3)	0
Corporate securities
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Beginning balance			(241)	0
(Increase) in allowance for credit losses			(109)	(129)
Reduction in credit losses due to AFS securities sold during the year				3
Gains from recoveries of amounts previously written off			70	46
Ending balance	(280)	(80)	(280)	(80)
Asset backed securities
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Beginning balance			0	0
(Increase) in allowance for credit losses			(1)	0
Reduction in credit losses due to AFS securities sold during the year				0
Gains from recoveries of amounts previously written off			0	0
Ending balance	(1)	0	(1)	0
Obligations of foreign governments
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Beginning balance			(4)	0
(Increase) in allowance for credit losses			0	(6)
Reduction in credit losses due to AFS securities sold during the year				1
Gains from recoveries of amounts previously written off			2	1
Ending balance	$ (2)	$ (4)	$ (2)	$ (4)

X

- 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 https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455

+ Details

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X

- 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.

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

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X

- Definition

Amount, excluding accrued interest, 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) with no credit loss previously recorded.

+ 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 (b)
-URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455

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- Definition

Amount, excluding accrued interest, of increase 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 recovery.

+ 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 (h)
-URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455

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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 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 (d)
-URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455

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