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Investments in Equity Securities (Tables) | 9 Months Ended
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Sep. 30, 2023
Equity securities |
Debt Securities, Available-for-sale [Line Items] |
Schedule of Investments in Equity Securities | At September 30, 2023 and December 31, 2022, investments in equity securities were as follows:
(In thousands) | Cost |  | Gross Unrealized |  | Fair Value |  | Carrying Value
Gains |  | Losses |
September 30, 2023 |  |  |  |  |  |  |  |  |
Common stocks | $ | 792,512 |  |  | $ | 209,979 |  |  | $ | (41,058) |  |  | $ | 961,433 |  |  | $ | 961,433 |
Preferred stocks | 273,376 |  |  | 2,383 |  |  | (55,131) |  |  | 220,628 |  |  | 220,628 |
Total | $ | 1,065,888 |  |  | $ | 212,362 |  |  | $ | (96,189) |  |  | $ | 1,182,061 |  |  | $ | 1,182,061 |
December 31, 2022 |  |  |  |  |  |  |  |  |
Common stocks | $ | 855,987 |  |  | $ | 192,165 |  |  | $ | (65,401) |  |  | $ | 982,751 |  |  | $ | 982,751 |
Preferred stocks | 259,341 |  |  | 1,053 |  |  | (57,251) |  |  | 203,143 |  |  | 203,143 |
Total | $ | 1,115,328 |  |  | $ | 193,218 |  |  | $ | (122,652) |  |  | $ | 1,185,894 |  |  | $ | 1,185,894 |

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