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Accumulated Other Comprehensive Income (Loss) (Tables)
3 Months Ended
Mar. 31, 2023
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, 2023 and 2022: 
 Three Months Ended March 31,
20232022
(In thousands)Before TaxTax EffectNet of TaxBefore TaxTax EffectNet of Tax
Balance at beginning of year$(443,230)$60,440 $(382,790)$65,280 $(14,573)$50,707 
Other comprehensive income (loss):      
Unrealized holding gains (losses) on investments:
Unrealized holding gains (losses) arising during the period67,693 (9,476)58,217 (246,255)34,830 (211,425)
Less: Reclassification adjustment for losses included in net income (1)488 48 536 7,352 1,067 8,419 
Net unrealized gains (losses) on investments68,181 (9,428)58,753 (238,903)35,897 (203,006)
Other comprehensive income (loss)68,181 (9,428)58,753 (238,903)35,897 (203,006)
Balance at end of period$(375,049)$51,012 $(324,037)$(173,623)$21,324 $(152,299)
(1)Included in net realized investment losses on our condensed consolidated statements of comprehensive income.