Investments (Credit Losses Recognized In Earnings on Fixed Maturity Securities Held by the Company) (Details) - Fixed maturities - Available-for-sale - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Debt Securities, Available-for-sale [Line Items]
Balance, beginning of period	$ 335	$ 982	$ 686	$ 0
Additions to allowance for credit losses not previously recorded	2,226	216	2,658	1,384
Reductions for securities sold during the period	(282)	0	(295)	(2)
Addition (reductions) on securities with previous allowance	(53)	(630)	(823)	(814)
Balance, end of period	2,226	568	2,226	568
U.S. Treasury securities and obligations of U.S. government authorities and agencies
Debt Securities, Available-for-sale [Line Items]
Balance, beginning of period	0	0	0	0
Additions to allowance for credit losses not previously recorded	0	0	0	0
Reductions for securities sold during the period	0	0	0	0
Addition (reductions) on securities with previous allowance	0	0	0	0
Balance, end of period	0	0	0	0
Foreign government bonds
Debt Securities, Available-for-sale [Line Items]
Balance, beginning of period	0	0	0	0
Additions to allowance for credit losses not previously recorded	0	0	0	0
Reductions for securities sold during the period	0	0	0	0
Addition (reductions) on securities with previous allowance	0	0	0	0
Balance, end of period	0	0	0	0
U.S. and Foreign Corporate Securities
Debt Securities, Available-for-sale [Line Items]
Balance, beginning of period	335	982	686	0
Additions to allowance for credit losses not previously recorded	2,226	216	2,658	1,384
Reductions for securities sold during the period	(282)	0	(295)	(2)
Addition (reductions) on securities with previous allowance	(53)	(630)	(823)	(814)
Balance, end of period	2,226	568	2,226	568
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Balance, beginning of period	0	0	0	0
Additions to allowance for credit losses not previously recorded	0	0	0	0
Reductions for securities sold during the period	0	0	0	0
Addition (reductions) on securities with previous allowance	0	0	0	0
Balance, end of period	0	0	0	0
Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Balance, beginning of period	0	0	0	0
Additions to allowance for credit losses not previously recorded	0	0	0	0
Reductions for securities sold during the period	0	0	0	0
Addition (reductions) on securities with previous allowance	0	0	0	0
Balance, end of period	0	0	0	0
Residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Balance, beginning of period	0	0	0	0
Additions to allowance for credit losses not previously recorded	0	0	0	0
Reductions for securities sold during the period	0	0	0	0
Addition (reductions) on securities with previous allowance	0	0	0	0
Balance, end of period	$ 0	$ 0	$ 0	$ 0

This item represents an increase to the cumulative amount of credit losses recognized in earnings for an other than temporary impairment (OTTI) of a debt security held for which no such other than temporary impairment (OTTI) was previously recognized.

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- Definition

The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 8B
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-Publisher FASB
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-Section 50
-Paragraph 8B
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-URI http://asc.fasb.org/extlink&oid=123581744&loc=SL6284393-111563

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- Definition

Amount of increase (decrease) in the cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (loss).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 8B
-URI http://asc.fasb.org/extlink&oid=123581744&loc=SL6284393-111563

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- Definition

This item represents reductions in the cumulative amount of credit losses recognized in earnings for an other than temporary impairment (OTTI) of a debt security because of the sale of impaired securities during the period.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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