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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2021
Earnings Per Share [Abstract] |
Schedule of earnings per weighted average common share outstanding | The following table presents the calculation of Pinnacle West’s basic and diluted earnings per share (in thousands, except per share amounts):
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  |  | 2021 |  | 2020 |  | 2021 |  | 2020
Net income attributable to common shareholders |  |  | $ | 215,697 |  |  | $ | 193,585 |  |  | $ | 251,338 |  |  | $ | 223,578 |
Weighted average common shares outstanding — basic |  |  | 112,882 |  |  | 112,638 |  |  | 112,855 |  |  | 112,616 |
Net effect of dilutive securities: |  |  |  |  |  |  |  |  |
Contingently issuable performance shares and restricted stock units |  |  | 341 |  |  | 241 |  |  | 303 |  |  | 255 |
Weighted average common shares outstanding — diluted |  |  | 113,223 |  |  | 112,879 |  |  | 113,158 |  |  | 112,871 |
Earnings per weighted-average common share outstanding |  |  |  |  |  |  |  |  |
Net income attributable to common shareholders — basic |  |  | $ | 1.91 |  |  | $ | 1.72 |  |  | $ | 2.23 |  |  | $ | 1.99 |
Net income attributable to common shareholders — diluted |  |  | $ | 1.91 |  |  | $ | 1.71 |  |  | $ | 2.22 |  |  | $ | 1.98 |

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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://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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