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Consolidated Statements of Comprehensive Income (Loss) (unaudited) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Statement of Comprehensive Income [Abstract]        
Net income $ 182,567 $ 143,802 $ 452,634 $ 385,315
Change in debt securities available-for-sale:        
Unrealized holding gains (losses) for the period 94,794 216,995 262,771 154,498
Reclassification adjustment for securities (gains) losses realized in income (7) 76 110 90
Income tax effect (23,828) (54,153) (66,017) (38,470)
Unrealized gains (losses) on available-for-sale securities 70,959 162,918 196,864 116,118
Change in securities held-to-maturity:        
Amortization of unrecognized losses on securities transferred     from available-for-sale 4,040 4,740 12,024 13,434
Income tax effect (1,026) (1,203) (3,052) (3,411)
Changes from securities held-to-maturity 3,014 3,537 8,972 10,023
Change in hedges:        
Net unrealized derivative gains (losses) on hedges (1,597) 23,654 14,328 (2,540)
Reclassification adjustment for (gains) losses realized in net income 3,275 4,936 7,004 14,560
Income tax effect (434) (7,393) (5,516) (3,108)
Changes from hedges 1,244 21,197 15,816 8,912
Other comprehensive income (loss), net of tax 75,217 187,652 221,652 135,053
Comprehensive income (loss) $ 257,784 $ 331,454 $ 674,286 $ 520,368