Fair Value (Activity Under Level 3, Fair Value Measurements Using Significant Unobservable Inputs By Asset Type) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Market Value [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance fixed maturities	$ 1,330,224	$ 772,979
Total gains or (losses) (realized/unrealized) Included in earnings	(17,787)	1,772
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss)	(2,411)	10,710
Purchases, issuances and settlements	757,844	545,687
Transfer in and/or (out) of Level 3		(924)
Ending balance	2,067,870	1,330,224
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date	(24,146)	(539)
Market Value [Member] \| Corporate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance fixed maturities	701,492	617,588
Total gains or (losses) (realized/unrealized) Included in earnings	(11,717)	1,216
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss)	4,008	(1,115)
Purchases, issuances and settlements	106,791	84,840
Transfer in and/or (out) of Level 3		(1,037)
Ending balance	800,574	701,492
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date	(16,467)	(539)
Market Value [Member] \| Asset Backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance fixed maturities	623,033	153,641
Total gains or (losses) (realized/unrealized) Included in earnings	(6,469)	681
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss)	(6,603)	11,678
Purchases, issuances and settlements	641,320	457,033
Transfer in and/or (out) of Level 3
Ending balance	1,251,281	623,033
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date	(7,679)
Market Value [Member] \| Foreign Corporate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance fixed maturities	5,699	1,750
Total gains or (losses) (realized/unrealized) Included in earnings	399	(125)
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss)	184	147
Purchases, issuances and settlements	9,733	3,814
Transfer in and/or (out) of Level 3		113
Ending balance	16,015	5,699
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date
Fair Value [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance fixed maturities		5,826
Total gains or (losses) (realized/unrealized) Included in earnings		(919)
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss)
Purchases, issuances and settlements		(4,907)
Transfer in and/or (out) of Level 3
Ending balance
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date
Fair Value [Member] \| Foreign Corporate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance fixed maturities		5,826
Total gains or (losses) (realized/unrealized) Included in earnings		(919)
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss)
Purchases, issuances and settlements		(4,907)
Transfer in and/or (out) of Level 3
Ending balance
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date

Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
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Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3).

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of purchases, (sales), issuances and (settlements) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of transfer of financial instrument classified as an asset into (out of) level 3 of the fair value hierarchy.

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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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