Derivative Instruments (Change in Fair Value of Derivatives Not Designated as Hedging) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of embedded derivatives	$ 162,202	$ 404,440
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of derivatives	409,767	44,765
Change in fair value of embedded derivatives	162,202	404,440
Not Designated as Hedging Instrument \| Call Options
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of derivatives	409,767	43,444
Not Designated as Hedging Instrument \| Warrants
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of derivatives	0	1,321
Not Designated as Hedging Instrument \| Fixed index annuities - embedded derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of embedded derivatives	203,680	340,060
Not Designated as Hedging Instrument \| Reinsurance Related Embedded Derivative
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of embedded derivatives	$ (41,478)	$ 64,380

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4E
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-4E

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-4C

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 4CC
-SubTopic 10
-Topic 815
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-4CC

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- Definition

Net Increase or Decrease in the fair value of the embedded derivative or group of embedded derivatives included in earnings in the period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 15
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//815-15/tableOfContent

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