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Selected Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2016
Selected Quarterly Financial Information [Line Items] |
Schedule of quarterly financial information | Consolidated quarterly financial information for 2016 and 2015 is provided in the tables below (dollars in thousands, except per share amounts). Weather conditions cause significant seasonal fluctuations in our revenues; therefore, results for interim periods do not necessarily represent results expected for the year.
| 2016 Quarter Ended |  | 2016
| March 31, |  | June 30, |  | September 30, |  | December 31, |  | Total
Operating revenues | $ | 677,167 |  |  | $ | 915,394 |  |  | $ | 1,166,922 |  |  | $ | 739,199 |  |  | $ | 3,498,682 |
Operations and maintenance | 243,195 |  |  | 242,279 |  |  | 217,568 |  |  | 208,277 |  |  | 911,319 |
Operating income | 50,162 |  |  | 231,748 |  |  | 451,258 |  |  | 122,816 |  |  | 855,984 |
Income taxes | 1,914 |  |  | 65,742 |  |  | 141,446 |  |  | 27,309 |  |  | 236,411 |
Net income | 9,326 |  |  | 126,182 |  |  | 267,900 |  |  | 58,119 |  |  | 461,527 |
Net income attributable to common shareholders | 4,453 |  |  | 121,308 |  |  | 263,027 |  |  | 53,246 |  |  | 442,034 |
Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to common shareholders — Basic | $ | 0.04 |  |  | $ | 1.09 |  |  | $ | 2.36 |  |  | $ | 0.48 |  |  | $ | 3.97 |
Net income attributable to common shareholders — Diluted | 0.04 |  |  | 1.08 |  |  | 2.35 |  |  | 0.47 |  |  | 3.95 |
| 2015 Quarter Ended |  | 2015
| March 31, |  | June 30, |  | September 30, |  | December 31, |  | Total
Operating revenues | $ | 671,219 |  |  | $ | 890,648 |  |  | $ | 1,199,146 |  |  | $ | 734,430 |  |  | $ | 3,495,443 |
Operations and maintenance | 214,944 |  |  | 210,965 |  |  | 220,449 |  |  | 222,019 |  |  | 868,377 |
Operating income | 67,684 |  |  | 231,973 |  |  | 445,111 |  |  | 109,834 |  |  | 854,602 |
Income taxes | 7,947 |  |  | 67,371 |  |  | 139,555 |  |  | 22,847 |  |  | 237,720 |
Net income | 20,727 |  |  | 127,507 |  |  | 261,978 |  |  | 45,978 |  |  | 456,190 |
Net income attributable to common shareholders | 16,122 |  |  | 122,902 |  |  | 257,116 |  |  | 41,117 |  |  | 437,257 |
Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to common shareholders — Basic | $ | 0.15 |  |  | $ | 1.11 |  |  | $ | 2.32 |  |  | $ | 0.37 |  |  | $ | 3.94 |
Net income attributable to common shareholders — Diluted | 0.14 |  |  | 1.10 |  |  | 2.30 |  |  | 0.37 |  |  | 3.92 |
ARIZONA PUBLIC SERVICE COMPANY |
Selected Quarterly Financial Information [Line Items] |
Schedule of quarterly financial information | APS's quarterly financial information for 2016 and 2015 is as follows (dollars in thousands):
| 2016 Quarter Ended, |  | 2016
| March 31, |  | June 30, |  | September 30, |  | December 31, |  | Total
Operating revenues | $ | 676,632 |  |  | $ | 909,757 |  |  | $ | 1,166,359 |  |  | $ | 737,006 |  |  | $ | 3,489,754 |
Operations and maintenance | 238,711 |  |  | 233,712 |  |  | 209,366 |  |  | 197,319 |  |  | 879,108 |
Operating income | 48,930 |  |  | 165,684 |  |  | 307,601 |  |  | 95,765 |  |  | 617,980 |
Net income attributable to common shareholder | 7,253 |  |  | 127,188 |  |  | 269,220 |  |  | 58,480 |  |  | 462,141 |
| 2015 Quarter Ended, |  | 2015
| March 31, |  | June 30, |  | September 30, |  | December 31, |  | Total
Operating revenues | $ | 670,668 |  |  | $ | 889,723 |  |  | $ | 1,198,380 |  |  | $ | 733,586 |  |  | $ | 3,492,357 |
Operations and maintenance | 209,947 |  |  | 208,031 |  |  | 216,011 |  |  | 219,146 |  |  | 853,135 |
Operating income | 61,333 |  |  | 162,704 |  |  | 301,238 |  |  | 86,709 |  |  | 611,984 |
Net income attributable to common shareholder | 19,868 |  |  | 125,362 |  |  | 261,187 |  |  | 43,857 |  |  | 450,274 |

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