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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2020
Earnings Per Share [Abstract] |
Earnings Per Share [Table Text Block] |
(In thousands, except share and per share amounts) |  | Three Months Ended March 31,
|  | 2020 |  | 2019
Numerator: |  |  |  |
Net income attributable to BOK Financial Corp. shareholders |  | $ | 62,079 |  |  | $ | 110,612 |
Less: Earnings allocated to participating securities |  | 343 |  |  | 828 |
Numerator for basic earnings per share – income available to common shareholders |  | 61,736 |  |  | 109,784 |
Effect of reallocating undistributed earnings of participating securities |  | — |  |  | — |
Numerator for diluted earnings per share – income available to common shareholders |  | $ | 61,736 |  |  | $ | 109,784 |
Denominator: |  |  |  |  |  |
Weighted average shares outstanding |  | 70,513,807 |  |  | 71,926,041 |
Less: Participating securities included in weighted average shares outstanding |  | 390,122 |  |  | 538,971 |
Denominator for basic earnings per common share |  | 70,123,685 |  |  | 71,387,070 |
Dilutive effect of employee stock compensation plans |  | 6,481 |  |  | 17,318 |
Denominator for diluted earnings per common share |  | 70,130,166 |  |  | 71,404,388 |
Basic earnings per share |  | $ | 0.88 |  |  | $ | 1.54 |
Diluted earnings per share |  | $ | 0.88 |  |  | $ | 1.54 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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