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Accumulated Other Comprehensive Income (Loss) - Schedule of AOCI (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | $ 8,126,387 | $ 6,075,072 | $ 6,340,350 | $ 5,562,900
Other comprehensive income (loss) before reclassifications | 69,780 | 180,398 | 207,405 | 114,168
Amounts reclassified from AOCI to income | 5,437 | 7,254 | 14,247 | 20,885
Ending balance | 8,309,271 | 6,367,298 | 8,309,271 | 6,367,298
Accumulated Other Comprehensive Income (Loss) |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (599,608) | (791,408) | (746,043) | (738,809)
Ending balance | (524,391) | (603,756) | (524,391) | (603,756)
Unrealized Gains and Losses on Available-for-Sale Debt Securities |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (542,158) | (699,318) | (668,063) | (652,518)
Other comprehensive income (loss) before reclassifications | 70,964 | 162,861 | 196,782 | 116,051
Amounts reclassified from AOCI to income | (5) | 57 | 82 | 67
Ending balance | (471,199) | (536,400) | (471,199) | (536,400)
Unrecognized Gains and Losses on Held-to-Maturity Securities |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (76,336) | (88,986) | (82,294) | (95,472)
Other comprehensive income (loss) before reclassifications | 0 | 0 | 0 | 0
Amounts reclassified from AOCI to income | 3,014 | 3,537 | 8,972 | 10,023
Ending balance | (73,322) | (85,449) | (73,322) | (85,449)
Gains and Losses on Hedges |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | 18,886 | (3,104) | 4,314 | 9,181
Other comprehensive income (loss) before reclassifications | (1,184) | 17,537 | 10,623 | (1,883)
Amounts reclassified from AOCI to income | 2,428 | 3,660 | 5,193 | 10,795
Ending balance | $ 20,130 | $ 18,093 | $ 20,130 | $ 18,093

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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