v3.26.1
Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Cash Flows From Operating Activities: [Abstract]    
Net income $ 332,302 $ 259,841
Adjustments to reconcile net income to net cash used in operating activities: [Abstract]    
Provision for credit losses 0 0
Change in fair value of mortgage servicing rights due to market assumption changes (14,455) 12,259
Change in the fair value of mortgage servicing rights due to principal payments 20,666 11,429
Net unrealized losses (gains) from derivative contracts 6,532 125,612
Share-based compensation 11,107 11,698
Depreciation and amortization 55,735 54,621
Net amortization of discounts and premiums (24,886) (25,878)
Net losses (gains) on financial instruments and other losses (gains), net (37,554) (7,415)
Net loss (gain) on mortgage loans held for sale (5,635) (4,311)
Mortgage loans originated for sale (511,696) (378,970)
Proceeds from sale of mortgage loans held for sale 509,895 359,430
Capitalized mortgage servicing rights (8,840) (5,572)
Change in trading and fair value option securities 513,421 (750,189)
Change in receivables 30,785 (77,006)
Change in other assets (16,747) 26,836
Change in other liabilities 13,451 497,271
Net cash provided by (used in) operating activities 874,081 109,656
Cash Flows From Investing Activities: [Abstract]    
Proceeds from maturities or redemptions of investment securities 156,194 118,862
Proceeds from maturities or redemptions of available-for-sale securities 1,425,559 1,037,812
Purchases of available-for-sale securities (1,776,140) (1,249,508)
Proceeds from sales of available-for-sale securities 268,479 0
Change in amount receivable on unsettled available-for-sale securities transactions (6,992) (13,388)
Loans originated, net of principal collected (1,423,575) (153,984)
Net proceeds from derivative asset contracts (37,258) (42,108)
Net change in restricted equity securities (73,661)  
Net change in restricted equity securities   111,819
Proceeds from disposition of assets 33,065 15,429
Purchases of assets (82,958) (76,786)
Net cash provided by (used in) investing activities (1,517,287) (251,852)
Cash Flows From Financing Activities: [Abstract]    
Net change in demand deposits, transaction deposits, and savings accounts 208,636 40,621
Net change in time deposits 212,199 14,258
Net change in other borrowed funds 320,144 475,337
Repayment of subordinated debentures 0 132,166
Net payments on derivative liability contracts 41,338 29,416
Net change in derivative margin accounts (222,222) (212,503)
Change in amount due on unsettled available-for-sale securities transactions 41,972 (5,417)
Issuance of common and treasury stock, net (11,598) (6,176)
Repurchase of common stock (8,162) (63,795)
Dividends paid (75,837) (73,017)
Net cash provided by (used in) financing activities 506,470 66,558
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total (136,736) (75,638)
Cash and cash equivalents at beginning of period 1,658,102 1,434,701
Cash and cash equivalents at end of period 1,521,366 1,359,063
Supplemental Cash Flow Information: [Abstract]    
Cash paid for interest 564,815 619,288
Cash paid for federal taxes 76,600 41,600
Cash paid for state taxes 11,544 8,899
Net loans and bank premises transferred to repossessed real estate and other assets 5,236 28
Residential mortgage loans guaranteed by U.S. government agencies that became eligible for repurchase during the period 20,112 23,865
Conveyance of other real estate owned guaranteed by U.S. government agencies 3,304 1,936
Right-of-use assets obtained in exchange for operating lease liabilities $ 18,642 $ 1,930