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

No definition available.

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- Definition

Amount, after tax, of accumulated increase (decrease) in equity from transaction and other event and circumstance from nonowner source.

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- Definition

Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount after tax of reclassification adjustments of other comprehensive income (loss) attributable to parent.

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Comprehensive Income (Loss) - Schedule of Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2023			$ (373,001)
Net current period OCI	$ (7,749)	$ (45,373)	(19,720)	$ 22,320
Balance, June 30, 2024	(392,721)		(392,721)
Available-for-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2023			(194,628)
OCI before reclassifications			(18,887)
Amounts reclassified from AOCI			(28)
Net current period OCI			(18,915)
Balance, June 30, 2024	(213,543)		(213,543)
Investments Subtotal
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2023			(279,070)
OCI before reclassifications			(24,288)
Amounts reclassified from AOCI			3,040
Net current period OCI			(21,248)
Balance, June 30, 2024	(300,318)		(300,318)
Credit Loss Related
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2023			(84,442)
OCI before reclassifications			(5,401)
Amounts reclassified from AOCI			3,068
Net current period OCI			(2,333)
Balance, June 30, 2024	(86,775)		(86,775)
Defined benefit pension and post-retirement life plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2023			(93,931)
OCI before reclassifications			0
Amounts reclassified from AOCI			1,528
Net current period OCI			1,528
Balance, June 30, 2024	(92,403)		(92,403)
Total AOCI
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2023			(373,001)
OCI before reclassifications			(24,288)
Amounts reclassified from AOCI			4,568
Net current period OCI	(7,749)	$ (45,373)	(19,720)	$ 22,320
Balance, June 30, 2024	$ (392,721)		$ (392,721)