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Investments in Equity Securities (Tables) | 9 Months Ended
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Sep. 30, 2025
Equity securities |
Debt Securities, Available-for-sale [Line Items] |
Schedule of Investments in Equity Securities | At September 30, 2025 and December 31, 2024, investments in equity securities were as follows:
(In thousands) | Cost |  | Gross Unrealized |  | Fair Value |  | Carrying Value
Gains |  | Losses |
September 30, 2025 |  |  |  |  |  |  |  |  |
Common stocks | $ | 571,667 |  |  | $ | 159,201 |  |  | $ | (8,918) |  |  | $ | 721,950 |  |  | $ | 721,950 |
Preferred stocks | 455,784 |  |  | 209,432 |  |  | (4,734) |  |  | 660,482 |  |  | 660,482 |
Total | $ | 1,027,451 |  |  | $ | 368,633 |  |  | $ | (13,652) |  |  | $ | 1,382,432 |  |  | $ | 1,382,432 |
December 31, 2024 |  |  |  |  |  |  |  |  |
Common stocks | $ | 612,479 |  |  | $ | 223,981 |  |  | $ | (76,293) |  |  | $ | 760,167 |  |  | $ | 760,167 |
Preferred stocks | 329,495 |  |  | 122,716 |  |  | (8,590) |  |  | 443,621 |  |  | 443,621 |
Total | $ | 941,974 |  |  | $ | 346,697 |  |  | $ | (84,883) |  |  | $ | 1,203,788 |  |  | $ | 1,203,788 |

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