Investments - Schedule of Changes in Assets Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3) (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation
Percent of total fixed maturities	100.00%		100.00%
Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation
Beginning Balance	$ 474,114	$ 496,879
Included in realized gains / losses	(592)	0
Included in other comprehensive income	(3,257)	(9,163)
Acquisitions	38,854	14,800
Sales	(36,398)	0
Amortization	1,906	2,244
Other	(23,637)	(24,005)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Ending Balance	$ 450,990	$ 480,755
Percent of total fixed maturities	3.00%	3.00%	3.00%
Significant Unobservable Inputs (Level 3) \| Asset- backed Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation
Beginning Balance	$ 11,183	$ 0
Included in realized gains / losses	0	0
Included in other comprehensive income	71	0
Acquisitions	21,339	0
Sales	0	0
Amortization	0	0
Other	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Ending Balance	$ 32,593	$ 0
Percent of total fixed maturities	0.00%	0.00%
Significant Unobservable Inputs (Level 3) \| Collateralized debt obligations
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation
Beginning Balance	$ 42,866	$ 42,146
Included in realized gains / losses	(588)	0
Included in other comprehensive income	0	742
Acquisitions	0	0
Sales	(36,398)	0
Amortization	1,893	2,277
Other	(7,773)	(2,441)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Ending Balance	$ 0	$ 42,724
Percent of total fixed maturities	0.00%	0.00%
Significant Unobservable Inputs (Level 3) \| Corporates
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation
Beginning Balance	$ 420,065	$ 454,733
Included in realized gains / losses	(4)	0
Included in other comprehensive income	(3,328)	(9,905)
Acquisitions	17,515	14,800
Sales	0	0
Amortization	13	(33)
Other	(15,864)	(21,564)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Ending Balance	$ 418,397	$ 438,031
Percent of total fixed maturities	3.00%	3.00%

Fair value, measurement with unobservable inputs reconciliation, recurring basis, asset, amortization.

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- Definition

Other adjustments, including capitalized interest and foreign exchange.

+ References

No definition available.

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- Definition

Percent Of Available For Sale Securities At Fair Value By Valuation Level

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

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

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- Definition

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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- Definition

Amount of purchases 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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- Definition

Amount of sale 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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- Definition

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

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- Definition

Amount of transfers of financial instrument classified as an asset 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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