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Segment Information (Tables) | 3 Months Ended
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Mar. 31, 2018
Segment Reporting [Abstract] |
Summary of Financial Information by Segment | The following tables present summarized financial information for PNMR by segment. PNM and TNMP each operate in only one segment. Therefore, tabular segment information is not presented for PNM and TNMP. PNMR SEGMENT INFORMATION
| PNM |  | TNMP |  | Corporate and Other |  | Consolidated
| (In thousands)
Three Months Ended March 31, 2018 |  |  |  |  |  |  |
Electric operating revenues | $ | 236,232 |  |  | $ | 81,646 |  |  | $ | — |  |  | $ | 317,878 |
Cost of energy | 70,802 |  |  | 21,754 |  |  | — |  |  | 92,556 |
Utility margin | 165,430 |  |  | 59,892 |  |  | — |  |  | 225,322 |
Other operating expenses | 100,511 |  |  | 24,973 |  |  | (5,016 | ) |  | 120,468 |
Depreciation and amortization | 36,627 |  |  | 16,387 |  |  | 5,708 |  |  | 58,722 |
Operating income (loss) | 28,292 |  |  | 18,532 |  |  | (692 | ) |  | 46,132 |
Interest income | 2,487 |  |  | — |  |  | 1,637 |  |  | 4,124 |
Other income (deductions) | 1,217 |  |  | 1,085 |  |  | 79 |  |  | 2,381 |
Interest charges | (20,830 | ) |  | (7,729 | ) |  | (4,496 | ) |  | (33,055 | )
Segment earnings (loss) before income taxes | 11,166 |  |  | 11,888 |  |  | (3,472 | ) |  | 19,582 |
Income taxes (benefit) | (348 | ) |  | 2,475 |  |  | (1,344 | ) |  | 783 |
Segment earnings (loss) | 11,514 |  |  | 9,413 |  |  | (2,128 | ) |  | 18,799 |
Valencia non-controlling interest | (3,677 | ) |  | — |  |  | — |  |  | (3,677 | )
Subsidiary preferred stock dividends | (132 | ) |  | — |  |  | — |  |  | (132 | )
Segment earnings (loss) attributable to PNMR | $ | 7,705 |  |  | $ | 9,413 |  |  | $ | (2,128 | ) |  | $ | 14,990 |
At March 31, 2018: |  |  |  |  |  |  |
Total Assets | $ | 4,925,741 |  |  | $ | 1,526,434 |  |  | $ | 224,218 |  |  | $ | 6,676,393 |
Goodwill | $ | 51,632 |  |  | $ | 226,665 |  |  | $ | — |  |  | $ | 278,297 |
| PNM |  | TNMP |  | Corporate and Other |  | Consolidated
| (In thousands)
Three Months Ended March 31, 2017 |  |  |  |  |  |  |
Electric operating revenues | $ | 251,558 |  |  | $ | 78,620 |  |  | $ | — |  |  | $ | 330,178 |
Cost of energy | 81,317 |  |  | 21,487 |  |  | — |  |  | 102,804 |
Utility margin | 170,241 |  |  | 57,133 |  |  | — |  |  | 227,374 |
Other operating expenses | 93,756 |  |  | 23,797 |  |  | (4,660 | ) |  | 112,893 |
Depreciation and amortization | 36,016 |  |  | 15,371 |  |  | 4,996 |  |  | 56,383 |
Operating income (loss) | 40,469 |  |  | 17,965 |  |  | (336 | ) |  | 58,098 |
Interest income | 2,816 |  |  | — |  |  | 2,065 |  |  | 4,881 |
Other income (deductions) | 5,545 |  |  | 732 |  |  | (335 | ) |  | 5,942 |
Interest charges | (21,012 | ) |  | (7,404 | ) |  | (3,284 | ) |  | (31,700 | )
Segment earnings (loss) before income taxes | 27,818 |  |  | 11,293 |  |  | (1,890 | ) |  | 37,221 |
Income taxes (benefit) | 7,708 |  |  | 3,689 |  |  | (622 | ) |  | 10,775 |
Segment earnings (loss) | 20,110 |  |  | 7,604 |  |  | (1,268 | ) |  | 26,446 |
Valencia non-controlling interest | (3,452 | ) |  | — |  |  | — |  |  | (3,452 | )
Subsidiary preferred stock dividends | (132 | ) |  | — |  |  | — |  |  | (132 | )
Segment earnings (loss) attributable to PNMR | $ | 16,526 |  |  | $ | 7,604 |  |  | $ | (1,268 | ) |  | $ | 22,862 |
At March 31, 2017: |  |  |  |  |  |  |
Total Assets | $ | 4,870,201 |  |  | $ | 1,396,055 |  |  | $ | 211,423 |  |  | $ | 6,477,679 |
Goodwill | $ | 51,632 |  |  | $ | 226,665 |  |  | $ | — |  |  | $ | 278,297 |

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8736-108599 + Details
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