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v3.23.2

Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Aug. 01, 2023 | Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Dividends declared (in dollars per share) |  | $ 0.54 | $ 0.53 | $ 1.08 | $ 1.06
Schedule of Accumulated Other Income (Loss) [Abstract] |  |  |  |  |
Balance, Beginning of Period |  |  |  | $ (836,955) | $ 72,371
Net change in unrealized gain (loss) |  | $ (160,408) | $ (242,536) | (36,363) | (881,577)
Transfer of net unrealized loss from AFS to investment securities |  |  |  |  | 0
Interest revenue, Investment securities |  | 16,033 | 2,455 | 32,084 | 2,455
Loss (gain) on available for sale securities, net |  | 3,010 | (1,188) | 3,010 | (2,125)
Other comprehensive income, before income taxes |  | (141,365) | (241,269) | (1,269) | (881,247)
Federal and state income taxes |  | (33,247) | (56,467) | (1,552) | (206,248)
Other comprehensive income, net of income taxes |  | (108,118) | (184,802) | 283 | (674,999)
Balance, End of Period |  | (836,672) | (602,628) | (836,672) | (602,628)
Accumulated Net Unrealized Gain (Loss) on Available for Sale Securities [Member] |  |  |  |  |
Schedule of Accumulated Other Income (Loss) [Abstract] |  |  |  |  |
Balance, Beginning of Period |  |  |  | (664,618) | 69,775
Net change in unrealized gain (loss) |  |  |  | (36,363) | (881,577)
Transfer of net unrealized loss from AFS to investment securities |  |  |  |  | 267,509
Interest revenue, Investment securities |  |  |  | 0 | 0
Loss (gain) on available for sale securities, net |  |  |  | 3,010 | (2,125)
Other comprehensive income, before income taxes |  |  |  | (33,353) | (616,193)
Federal and state income taxes |  |  |  | (8,839) | (144,215)
Other comprehensive income, net of income taxes |  |  |  | (24,514) | (471,978)
Balance, End of Period |  | (689,132) | (402,203) | (689,132) | (402,203)
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 |  |  |  | (172,337) | 0
Net change in unrealized gain (loss) |  |  |  | 0 | 0
Transfer of net unrealized loss from AFS to investment securities |  |  |  |  | (267,509)
Interest revenue, Investment securities |  |  |  | 32,084 | 2,455
Loss (gain) on available for sale securities, net |  |  |  | 0 | 0
Other comprehensive income, before income taxes |  |  |  | 32,084 | (265,054)
Federal and state income taxes |  |  |  | 7,287 | (62,033)
Other comprehensive income, net of income taxes |  |  |  | 24,797 | (203,021)
Balance, End of Period |  | (147,540) | (203,021) | (147,540) | (203,021)
Accumulated Unrealized Gain (Loss) on Employee Benefit Plans [Member] |  |  |  |  |
Schedule of Accumulated Other Income (Loss) [Abstract] |  |  |  |  |
Balance, Beginning of Period |  |  |  | 0 | 2,596
Net change in unrealized gain (loss) |  |  |  | 0 | 0
Transfer of net unrealized loss from AFS to investment securities |  |  |  |  | 0
Interest revenue, Investment securities |  |  |  | 0 | 0
Loss (gain) on available for sale securities, net |  |  |  | 0 | 0
Other comprehensive income, before income taxes |  |  |  | 0 | 0
Federal and state income taxes |  |  |  | 0 | 0
Other comprehensive income, net of income taxes |  |  |  | 0 | 0
Balance, End of Period |  | $ 0 | $ 2,596 | $ 0 | $ 2,596
Subsequent Event [Member] |  |  |  |  |
Dividends Payable, Date Declared | Aug. 01, 2023 |  |  |  |
Dividends declared (in dollars per share) | $ 0.54 |  |  |  |
Dividends Payable, Date to be Paid | Aug. 30, 2023 |  |  |  |
Dividends Payable, Date of Record | Aug. 15, 2023 |  |  |  |

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