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Accumulated Other Comprehensive (Loss), Net of Tax - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Net unrealized (losses) | $ (136,224) | $ (33,620) | $ (6,751)
Tax benefit | (248,300) | (216,664) | (153,694)
Net income | 768,707 | 867,840 | 644,283
Hedge terminations | (1,588,899) | (1,290,991) | (250,451)
Premium amortization | 3,927,286 | 3,628,260 | 2,284,737
Other expense | (139,309) | (168,748) | (180,088)
Gross losses realized on sale of available-for-sale securities | 2,600 | 3,800 |
Investment Securities Available- for-Sale | Reclassification out of accumulated comprehensive income |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Net unrealized (losses) | (138,794) | (37,356) | (6,751)
Tax benefit | 37,034 | 10,037 | 1,791
Net income | (101,760) | (27,319) | (4,960)
Derivative Financial Instruments | Reclassification out of accumulated comprehensive income |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Tax benefit | 75 | 720 | 1,066
Net income | (492) | (1,939) | (2,866)
Hedge terminations | (34) | (310) | (306)
Premium amortization | (533) | (2,349) | (3,626)
Defined Benefit Pension and Other Postretirement Benefit Plans | Reclassification out of accumulated comprehensive income |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Tax benefit | 517 | 1,072 | 600
Net income | (1,390) | (2,880) | (1,610)
Actuarial net loss amortization | Reclassification out of accumulated comprehensive income |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Other expense | (1,907) | (2,083) | (2,210)
Other | Reclassification out of accumulated comprehensive income |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Other expense | $ 0 | $ (1,869) | $ 0

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