| Earnings Per Share [Table Text Block] |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | (In thousands, except share and per share amounts) | | Three Months Ended June 30, | | Six Months Ended
June 30, | | | | 2025 | | 2024 | | 2025 | | 2024 | | Numerator: | | | | | | | | | | Net income attributable to BOK Financial Corp. shareholders | | $ | 140,018 | | | $ | 163,713 | | | $ | 259,795 | | | $ | 247,416 | | | Less: Earnings allocated to participating securities | | 1,506 | | | 1,602 | | | 2,774 | | | 2,278 | | Numerator for basic earnings per share – income available to common shareholders | | 138,512 | | | 162,111 | | | 257,021 | | | 245,138 | | | Add: Effect of reallocating undistributed earnings of participating securities | | — | | | — | | | — | | | — | | Numerator for diluted earnings per share – income available to common shareholders | | $ | 138,512 | | | $ | 162,111 | | | $ | 257,021 | | | $ | 245,138 | | | | | | | | | | | | Denominator: | | | | | | | | | | Weighted average shares outstanding | | 63,896,252 | | | 64,343,898 | | | 64,060,375 | | | 64,578,226 | | | Less: Participating securities included in weighted average shares outstanding | | 688,225 | | | 629,694 | | | 683,518 | | | 576,072 | | | Denominator for basic earnings per common share | | 63,208,027 | | | 63,714,204 | | | 63,376,857 | | | 64,002,154 | | | Add: Dilutive effect of employee stock compensation plans | | — | | | — | | | — | | | — | | | Denominator for diluted earnings per common share | | 63,208,027 | | | 63,714,204 | | | 63,376,857 | | | 64,002,154 | | | | | | | | | | | | Basic earnings per share | | $ | 2.19 | | | $ | 2.54 | | | $ | 4.05 | | | $ | 3.83 | | | Diluted earnings per share | | $ | 2.19 | | | $ | 2.54 | | | $ | 4.05 | | | $ | 3.83 | | | | | | | | | | |
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