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Investments - Schedule of Realized Gain (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Fair Value at Sale
Fair value at sale	$ 5,000	$ 13,696	$ 23,902	$ 38,429
Fair value at sale	128	105	54,975	1,366
Net fair value at sale	5,128	13,801	78,877	39,795
Debt Securities, Available-for-Sale, Realized Gain	3	0	227	64
Debt Securities, Available-for-Sale, Realized Loss	(1)	(4)	(7,033)	(108)
Debt Securities, Available-for-Sale, Realized Gain (Loss)	2	(4)	(6,806)	(44)
Other Investments
Fair Value at Sale
Fair value at sale	1,151
Debt Securities, Available-for-Sale, Realized Gain	3
Fixed Maturities
Fair Value at Sale
Fair value at sale	3,849	13,696	16,839	38,429
Fair value at sale	128	105	44,603	1,366
Debt Securities, Available-for-Sale, Realized Gain	0	0	59	64
Debt Securities, Available-for-Sale, Realized Loss	(1)	(4)	(6,368)	(108)
Equity Securities
Fair Value at Sale
Fair value at sale	0	0	5,786	0
Fair value at sale	0	0	10,372	0
Equity Securities, FV-NI, Realized Gain	0	0	165	0
Equity Securities, FV-NI, Realized Loss	0	0	(665)	0
Short-term Investments
Fair Value at Sale
Fair value at sale	0	0	126	0
Fair value at sale	0	0	0	0
Debt Securities, Available-for-Sale, Realized Gain	0	0	0	0
Debt Securities, Available-for-Sale, Realized Loss	$ 0	$ 0	$ 0	$ 0

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Amount of realized gain 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 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-9

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Amount of realized gain (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/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-9

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-9

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 321
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479536/321-10-50-4

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Amount of realized loss from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 321
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479536/321-10-50-4

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