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Reclassifications Out of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total before tax | $ 587 | $ 9,317 | $ 1,193 | $ 38,081
Income tax expense (benefit) | (2,371) | 626 | (2,944) | 4,039
Unrealized Gains and Losses on Available for Sale Securities |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total before tax | 587 | 9,317 | 1,193 | 38,081
Reclassification out of Accumulated Other Comprehensive Income |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total reclassifications, net of tax | 479 | 7,877 | 966 | 30,962
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains and Losses on Available for Sale Securities |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Other net realized investment (gains) losses | 587 | 8,637 | 1,193 | 11,876
Other than temporary impairment losses on investments | 0 | 680 | 0 | 26,205
Total before tax | 587 | 9,317 | 1,193 | 38,081
Income tax expense (benefit) | $ (108) | $ (1,440) | $ (227) | $ (7,119)

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