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Quarterly Operating Results (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2020
Quarterly Financial Data [Abstract] |
Schedule of Quarterly Financial Information | Unaudited operating results by quarters for 2020 and 2019 are presented below. In the opinion of management of the Company, all adjustments (consisting of normal recurring accruals) necessary for a fair statement of the results of operations for such periods have been included. The annual results of basic and diluted earnings per share shown below may be impacted by rounding.
| Quarter Ended |
| March 31 |  | June 30 |  | September 30 |  | December 31 |
| (In thousands, except per share amounts) |
PNMR |  |  |  |  |  |  |  |
2020 |  |  |  |  |  |  |  |
Operating revenues | $ | 333,622 |  |  | $ | 357,649 |  |  | $ | 472,465 |  |  | $ | 359,276 |  |
Operating income | 47,738 |  |  | 71,150 |  |  | 147,805 |  |  | 18,588 |  |
Net earnings (loss) | (11,399) |  |  | 61,561 |  |  | 125,453 |  |  | 11,701 |  |
Net earnings (loss) attributable to PNMR | (15,260) |  |  | 57,489 |  |  | 121,768 |  |  | 8,778 |  |
Net earnings (loss) attributable to PNMR per common share: |  |  |  |  |  |  |  |
Basic | (0.19) |  |  | 0.72 |  |  | 1.52 |  |  | 0.11 |  |
Diluted | (0.19) |  |  | 0.72 |  |  | 1.52 |  |  | 0.10 |  |
2019 |  |  |  |  |  |  |  | (1)
Operating revenues | $ | 349,645 |  |  | $ | 330,228 |  |  | $ | 433,586 |  |  | $ | 344,144 |  |
Operating income (loss) | 36,723 |  |  | (93,615) |  |  | 140,540 |  |  | 60,552 |  |
Net earnings (loss) | 21,662 |  |  | (72,283) |  |  | 106,763 |  |  | 35,989 |  |
Net earnings (loss) attributable to PNMR | 18,700 |  |  | (75,914) |  |  | 102,771 |  |  | 31,805 |  |
Net earnings attributable to PNMR per common share: |  |  |  |  |  |  |  |
Basic | 0.23 |  |  | (0.95) |  |  | 1.29 |  |  | 0.40 |  |
Diluted | 0.23 |  |  | (0.95) |  |  | 1.28 |  |  | 0.40 |  |
PNM |  |  |  |  |  |  |  |
2020 |  |  |  |  |  |  |  |
Operating revenues | $ | 248,133 |  |  | $ | 260,788 |  |  | $ | 364,504 |  |  | $ | 266,409 |  |
Operating income | 33,605 |  |  | 49,584 |  |  | 116,540 |  |  | 15,168 |  |
Net earnings (loss) | (12,196) |  |  | 49,612 |  |  | 103,004 |  |  | 19,594 |  |
Net earnings (loss) attributable to PNM | (15,925) |  |  | 45,672 |  |  | 99,451 |  |  | 16,803 |  |
2019 |  |  |  |  |  |  |  | (1)
Operating revenues | $ | 269,318 |  |  | $ | 238,219 |  |  | $ | 331,113 |  |  | $ | 255,172 |  |
Operating income (loss) | 24,293 |  |  | (115,977) |  |  | 108,453 |  |  | 44,299 |  |
Net earnings (loss) | 21,974 |  |  | (83,313) |  |  | 84,721 |  |  | 32,040 |  |
Net earnings (loss) attributable to PNM | 19,144 |  |  | (86,812) |  |  | 80,861 |  |  | 27,988 |  |
TNMP |  |  |  |  |  |  |  |
2020 |  |  |  |  |  |  |  |
Operating revenues | $ | 85,489 |  |  | $ | 96,861 |  |  | $ | 107,961 |  |  | $ | 92,867 |  |
Operating income | 14,345 |  |  | 23,175 |  |  | 31,779 |  |  | 19,154 |  |
Net earnings | 7,092 |  |  | 16,174 |  |  | 23,921 |  |  | 11,398 |  |
2019 |  |  |  |  |  |  |  |
Operating revenues | $ | 80,327 |  |  | $ | 92,009 |  |  | $ | 102,473 |  |  | $ | 88,972 |  |
Operating income | 12,585 |  |  | 22,578 |  |  | 32,596 |  |  | 18,055 |  |
Net earnings | 4,098 |  |  | 15,267 |  |  | 25,087 |  |  | 11,347 |  |
(1) 2019 reflects pre-tax impairments of $150.6 million offset by $45.7 million of related tax impacts resulting from the NM Supreme Court’s ruling on the appeals in the NM 2015 Rate Case. See Note 17.

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121640914&loc=d3e1280-108306 + Details
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