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Earnings Per Share | 3 Months Ended
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Mar. 31, 2021
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share 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 March 31, |  |
|  |  | 2021 |  | 2020 |  |  |  |
Net income attributable to common shareholders |  |  | $ | 35,641 |  |  | $ | 29,993 |  |  |  |  |
Weighted average common shares outstanding — basic |  |  | 112,829 |  |  | 112,594 |  |  |  |  |
Net effect of dilutive securities: |  |  |  |  |  |  |  |  |
Contingently issuable performance shares and restricted stock units |  |  | 264 |  |  | 268 |  |  |  |  |
Weighted average common shares outstanding — diluted |  |  | 113,093 |  |  | 112,862 |  |  |  |  |
Earnings per weighted-average common share outstanding |  |  |  |  |  |  |  |  |
Net income attributable to common shareholders — basic |  |  | $ | 0.32 |  |  | $ | 0.27 |  |  |  |  |
Net income attributable to common shareholders — diluted |  |  | $ | 0.32 |  |  | $ | 0.27 |  |  |  |  |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3630-109257 + Details
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