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Comprehensive Income - Schedule of Amounts Reclassed Out of Each Component of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Income tax expense (benefit) | $ 2,172 | $ 30 | $ 2,789 | $ (100)
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, after Tax | 144 | (103) | 586 | (356)
Net of tax and noncontrolling interest | (72,699) | (750) | (119,090) | 19,320
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 9,343 | (8,587) | 14,243 | (9,736)
Realized Investment Gains (Losses) | 2 | 4,535 | (1) | 4,536
Unrealized Gains (Losses) on Available-for-Sale Securities [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Net of tax and noncontrolling interest | 9,199 | (3,925) | 13,657 | (4,508)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 9,199 | (3,925) | 13,657 | (4,508)
Realized Investment Gains (Losses) | 12,513 | (3,580) | 18,470 | (4,148)
Accumulated Gain (Loss), Financial Liability, Fair Value Option, Attributable to Parent [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, after Tax | (144) | 103 | 586 | 356
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 144 | (103) | 586 | (356)
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, before Tax, after Reclassification Adjustment | 192 | (69) | 781 | (406)
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Net of tax and noncontrolling interest | 9,343 | (8,587) | 14,243 | (9,736)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains (Losses) on Available-for-Sale Securities [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Income tax expense (benefit) | 3,314 | 345 | 4,813 | 360
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Financial Liability, Fair Value Option, Attributable to Parent [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Income tax expense (benefit) |  |  | 195 |
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Financial Liability, Fair Value Option, Including Portion Attributable to Noncontrolling Interest [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Income tax expense (benefit) | 48 | 34 |  | (50)
Other Postretirement Benefits Plan [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 0 | (4,559) | 0 | (4,872)
Other Postretirement Benefits Plan [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Income tax expense (benefit) | 0 | 0 | 0 | 0
Prior service cost | 0 | 0 | 0 | (210)
Actuarial gains (losses) | 0 | 0 | 0 | (103)
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax |  | 4,559 |  | 4,559
Total before tax | 0 | (4,559) | 0 | (4,872)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | $ 0 | $ (4,559) | $ 0 | $ (4,872)

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