v3.25.2
Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Cash Flows From Operating Activities: [Abstract]    
Net income $ 259,841 $ 247,426
Adjustments to reconcile net income to net cash used in operating activities: [Abstract]    
Provision for credit losses 0 16,000
Change in fair value of mortgage servicing rights due to market assumption changes 12,259 (14,430)
Change in the fair value of mortgage servicing rights due to principal payments 11,429 13,459
Net unrealized (gains) losses from derivative contracts 125,612 (108,051)
Share-based compensation 11,698 10,062
Depreciation and amortization 54,621 52,076
Net amortization of discounts and premiums (25,878) (20,111)
Net losses (gains) on financial instruments and other losses (gains), net (7,415) (16,615)
Net loss (gain) on mortgage loans held for sale (4,311) (4,613)
Mortgage loans originated for sale (378,970) (379,214)
Proceeds from sale of mortgage loans held for sale 359,430 334,578
Capitalized mortgage servicing rights (5,572) (6,970)
Charitable contributions to BOKF Foundation 0 13,610
Change in trading and fair value option securities (750,189) (17,671)
Change in receivables (77,006) 264,352
Change in other assets 26,836 69,808
Change in other liabilities 497,271 189,069
Net cash provided by (used in) operating activities 109,656 642,765
Cash Flows From Investing Activities: [Abstract]    
Proceeds from maturities or redemptions of investment securities 118,862 113,747
Proceeds from maturities or redemptions of available-for-sale securities 1,037,812 940,442
Purchases of available-for-sale securities (1,249,508) (2,244,168)
Proceeds from sales of available-for-sale securities 0 737,830
Change in amount receivable on unsettled available-for-sale securities transactions (13,388) 95,997
Loans originated, net of principal collected (153,984) (651,931)
Net proceeds from derivative asset contracts (42,108) 15,651
Payments to Acquire Restricted Investments   (52,110)
Net change in restricted equity securities 111,819  
Proceeds from disposition of assets 15,429 12,600
Purchases of assets (76,786) (87,269)
Net cash provided by (used in) investing activities (251,852) (1,119,211)
Cash Flows From Financing Activities: [Abstract]    
Net change in demand deposits, transaction deposits and savings accounts 40,621 1,770,030
Net change in time deposits 14,258 451,913
Net change in other borrowed funds 475,337 (1,490,267)
Repayments of Subordinated Debt (132,166) 0
Net payments on derivative liability contracts 29,416 (20,415)
Net change in derivative margin accounts (212,503) (188,326)
Change in amount due on unsettled available-for-sale securities transactions (5,417) (154,203)
Issuance of common and treasury stock, net (6,176) (3,630)
Repurchase of common stock (63,795) (89,779)
Dividends paid (73,017) (70,979)
Net cash provided by (used in) financing activities 66,558 204,344
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total (75,638) (272,102)
Cash and cash equivalents at beginning of period 1,434,701 1,348,265
Cash and cash equivalents at end of period 1,359,063 1,076,163
Supplemental Cash Flow Information: [Abstract]    
Cash paid for interest 619,288 742,708
Cash paid for taxes 50,499 39,008
Net loans and bank premises transferred to repossessed real estate and other assets 28 77
Residential mortgage loans guaranteed by U.S. government agencies that became eligible for repurchase during the period 23,865 8,263
Conveyance of other real estate owned guaranteed by U.S. government agencies 1,936 1,840
Right-of-use assets obtained in exchange for operating lease liabilities $ 1,930 $ 18,236