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v3.24.3

Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Oct. 29, 2024 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Dividends declared (in dollars per share) |  | $ 0.55 | $ 0.54 | $ 1.65 | $ 1.62
Schedule of Accumulated Other Income (Loss) [Abstract] |  |  |  |  |
Balance, Beginning of Period |  |  |  | $ (599,100) | $ (836,955)
Net change in unrealized gain (loss) |  | $ 341,185 | $ (135,614) | 263,436 | (171,977)
Interest revenue, Investment securities |  | 11,431 | 14,912 | 35,641 | 46,996
Loss on available-for-sale securities, net |  | 691 | 0 | 45,828 | 3,010
Other comprehensive income, before income taxes |  | 353,307 | (120,702) | 344,905 | (121,971)
Federal and state income taxes |  | 83,094 | (28,389) | 81,094 | (29,941)
Other comprehensive income, net of income taxes |  | 270,213 | (92,313) | 263,811 | (92,030)
Balance, End of Period |  | (335,289) | (928,985) | (335,289) | (928,985)
Accumulated Net Unrealized Gain (Loss) on Available for Sale Securities [Member] |  |  |  |  |
Schedule of Accumulated Other Income (Loss) [Abstract] |  |  |  |  |
Balance, Beginning of Period |  |  |  | (473,212) | (664,618)
Net change in unrealized gain (loss) |  |  |  | 263,436 | (171,977)
Interest revenue, Investment securities |  |  |  | 0 | 0
Loss on available-for-sale securities, net |  |  |  | 45,828 | 3,010
Other comprehensive income, before income taxes |  |  |  | 309,264 | (168,967)
Federal and state income taxes |  |  |  | 72,711 | (40,735)
Other comprehensive income, net of income taxes |  |  |  | 236,553 | (128,232)
Balance, End of Period |  | (236,659) | (792,850) | (236,659) | (792,850)
AOCI, Accumulated Gain (Loss), Debt Securities, Investment Securities Transferred from Available-for-sale, Parent |  |  |  |  |
Schedule of Accumulated Other Income (Loss) [Abstract] |  |  |  |  |
Balance, Beginning of Period |  |  |  | (125,888) | (172,337)
Net change in unrealized gain (loss) |  |  |  | 0 | 0
Interest revenue, Investment securities |  |  |  | 35,641 | 46,996
Loss on available-for-sale securities, net |  |  |  | 0 | 0
Other comprehensive income, before income taxes |  |  |  | 35,641 | 46,996
Federal and state income taxes |  |  |  | 8,383 | 10,794
Other comprehensive income, net of income taxes |  |  |  | 27,258 | 36,202
Balance, End of Period |  | $ (98,630) | $ (136,135) | $ (98,630) | $ (136,135)
Subsequent Event [Member] |  |  |  |  |
Dividends declared (in dollars per share) | $ 0.57 |  |  |  |
Subsequent Event [Member] | Dividend Declared |  |  |  |  |
Dividends Payable, Date Declared | Oct. 29, 2024 |  |  |  |
Dividends Payable, Date to be Paid | Nov. 27, 2024 |  |  |  |
Dividends Payable, Date of Record | Nov. 15, 2024 |  |  |  |

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