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Investments (Schedule of components of net realized capital gain (loss) on investments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Gross realized gains	$ 18,130	$ 9,740	$ 4,652
Gross realized losses, excluding other-than-temporary impairment losses	(362)	(1,969)	(1,406)
Net realized gain on investments	17,768	7,771	3,246
Change in net unrealized gain on equity securities	(2,289)	5,853	11,537
Net capital gain on investments	15,479	13,624	14,783
Fixed income securities [Member]
Debt Securities, Available-for-sale [Line Items]
Gross realized gains	677	1,035	341
Gross realized losses, excluding other-than-temporary impairment losses	(27)	(132)	(147)
Equity securities [Member]
Debt Securities, Available-for-sale [Line Items]
Gross realized gains	17,453	8,705	4,311
Gross realized losses, excluding other-than-temporary impairment losses	$ (335)	$ (1,837)	$ (1,259)

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- Definition

Amount of realized gain (loss) on investment in debt and equity securities.

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
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Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), excluding other-than-temporary impairment (OTTI).

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Amount of realized and unrealized gain (loss) on investment.

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Amount of realized gain (loss) on investment.

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