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Accumulated Other Comprehensive Income (Loss) (Tables)
3 Months Ended
Mar. 31, 2024
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of Rollforward of Accumulated Other Comprehensive Loss
The following table presents the rollforward of accumulated other comprehensive loss for the three months ended March 31, 2024 and 2023: 
 Three Months Ended March 31,
20242023
(In thousands)Before TaxTax EffectNet of TaxBefore TaxTax EffectNet of Tax
Balance at beginning of period$(322,992)$42,496 $(280,496)$(443,230)$60,440 $(382,790)
Other comprehensive income (loss):      
Unrealized holding gains (losses) on investments:
Unrealized holding (losses) gains arising during the period(26,028)3,366 (22,662)67,693 (9,476)58,217 
Less: Reclassification adjustment for gains included in net income (1)1,140 (244)896 488 48 536 
Net unrealized (losses) gains on investments(24,888)3,122 (21,766)68,181 (9,428)58,753 
Other comprehensive (loss) income(24,888)3,122 (21,766)68,181 (9,428)58,753 
Balance at end of period$(347,880)$45,618 $(302,262)$(375,049)$51,012 $(324,037)
(1)Included in net realized investment losses on our condensed consolidated statements of comprehensive income.