| Reportable Segments [Table Text Block] |
Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended March 31, 2026 is as follows (in thousands): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commercial Banking | | Consumer Banking | | Wealth Management | | Segment Total | | Funds Management and Other | | BOK Financial Corporation | | Net interest income from external sources | | $ | 241,317 | | | $ | 17,788 | | | $ | 19,867 | | | $ | 278,972 | | | $ | 63,582 | | | $ | 342,554 | | | Net interest income (expense) from internal sources | | (67,844) | | | 38,201 | | | 23,107 | | | (6,536) | | | 6,536 | | | — | | | Net interest income | | 173,473 | | | 55,989 | | | 42,974 | | | 272,436 | | | 70,118 | | | 342,554 | | | Net loans charged off and provision for credit losses | | 400 | | | 1,508 | | | 496 | | | 2,404 | | | (2,404) | | | — | | | Net interest income after provision for credit losses | | 173,073 | | | 54,481 | | | 42,478 | | | 270,032 | | | 72,522 | | | 342,554 | | | Other operating revenue | | 60,068 | | | 42,866 | | | 110,387 | | | 213,321 | | | (2,053) | | | 211,268 | | | Personnel expense | | 51,267 | | | 25,466 | | | 69,413 | | | 146,146 | | | 65,028 | | | 211,174 | | | Non-personnel expense | | 31,041 | | | 38,027 | | | 28,756 | | | 97,824 | | | 45,168 | | | 142,992 | | Total other operating expense | | 82,308 | | | 63,493 | | | 98,169 | | | 243,970 | | | 110,196 | | | 354,166 | | | Corporate allocations | | 16,046 | | | 14,686 | | | 17,155 | | | 47,887 | | | (47,887) | | | — | | | Net income before taxes | | $ | 134,787 | | | $ | 19,168 | | | $ | 37,541 | | | $ | 191,496 | | | $ | 8,160 | | | $ | 199,656 | | | | | | | | | | | | | | | | Average assets | | $ | 22,679,465 | | | $ | 8,452,393 | | | $ | 11,370,683 | | | $ | 42,502,541 | | | $ | 10,620,468 | | | $ | 53,123,009 | |
Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended March 31, 2025 is as follows (in thousands): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commercial Banking | | Consumer Banking | | Wealth Management | | Segment Total | | Funds Management and Other | | BOK Financial Corporation | | Net interest income from external sources | | $ | 231,423 | | | $ | 8,740 | | | $ | 13,942 | | | $ | 254,105 | | | $ | 62,146 | | | $ | 316,251 | | | Net interest income (expense) from internal sources | | (53,165) | | | 48,512 | | | 30,560 | | | 25,907 | | | (25,907) | | | — | | | Net interest income | | 178,258 | | | 57,252 | | | 44,502 | | | 280,012 | | | 36,239 | | | 316,251 | | | Net loans charged off and provision for credit losses | | 148 | | | 1,517 | | | (8) | | | 1,657 | | | (1,657) | | | — | | | Net interest income after provision for credit losses | | 178,110 | | | 55,735 | | | 44,510 | | | 278,355 | | | 37,896 | | | 316,251 | | | Other operating revenue | | 55,521 | | | 39,058 | | | 96,336 | | | 190,915 | | | (4,874) | | | 186,041 | | | Personnel expense | | 49,574 | | | 25,837 | | | 67,245 | | | 142,656 | | | 71,529 | | | 214,185 | | | Non-personnel expense | | 28,906 | | | 31,399 | | | 27,021 | | | 87,326 | | | 46,018 | | | 133,344 | | Total other operating expense | | 78,480 | | | 57,236 | | | 94,266 | | | 229,982 | | | 117,547 | | | 347,529 | | | Corporate allocations | | 17,055 | | | 15,435 | | | 13,854 | | | 46,344 | | | (46,344) | | | — | | | Net income before taxes | | $ | 138,096 | | | $ | 22,122 | | | $ | 32,726 | | | $ | 192,944 | | | $ | (38,181) | | | $ | 154,763 | | | | | | | | | | | | | | | | Average assets | | $ | 21,400,745 | | | $ | 8,201,821 | | | $ | 11,367,435 | | | $ | 40,970,001 | | | $ | 10,016,902 | | | $ | 50,986,903 | |
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