Investments (Narrative) (Details) $ in Thousands	12 Months Ended
Dec. 31, 2022 USD ($) security	Dec. 31, 2021 USD ($) security	Dec. 31, 2020 USD ($)
Investments [Abstract]
Percentage of fixed maturity portfolio rated investment grade based on NAIC designations	98.00%	98.00%
Number of securities in unrealized loss position \| security	4,510	1,427
Percentage of unrealized losses on fixed maturity securities where securities are rated investment grade	98.00%	85.00%
Proceeds from sales of available for sale fixed maturity securities	$ 7,800,000	$ 800,000	$ 5,400,000
Principal repayments, calls and tenders of available for sale fixed maturity securities	2,800,000	3,700,000	$ 2,900,000
Cash and invested assets on deposit with state agencies to meet regulatory requirements	51,000,000	49,300,000
Fair value, concentration of risk, investments	$ 0	$ 0

Represents the percent of available-for-sale debt securities at fair value, rated investment grade (NAIC 1 or 2).

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- Definition

Represents the percent of unrealized losses on fixed maturity securities that is on securities classified as investment grade.

+ References

No definition available.

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- Definition

Carrying amount of cash and investment securities on deposit with state regulatory authorities in connection with capital requirements.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 825
-Section 50
-Paragraph 1A
-URI https://asc.fasb.org/extlink&oid=123600598&loc=SL75763979-209797

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Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
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This item represents disclosure of all significant concentrations of credit risk or market risk arising from the subject financial instrument (as defined), whether from an individual counterparty or groups of counterparties.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
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Amount of cash inflow from maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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