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v3.10.0.1

Condensed Consolidated Statement of Changes in Equity - USD ($) $ in Thousands | Total | Total PNMR Common Stockholders’ Equity | Common Stock | AOCI | Retained Earnings | Non- controlling Interest in Valencia | PNM | PNM Total PNMR Common Stockholders’ Equity | PNM Common Stock | PNM AOCI | PNM Retained Earnings | PNM Non- controlling Interest in Valencia | Texas-New Mexico Power Company | Texas-New Mexico Power Company Common Stock | Texas-New Mexico Power Company Paid-in Capital | Texas-New Mexico Power Company Retained Earnings
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Beginning balance at Dec. 31, 2016 |  |  |  | $ (92,451) |  |  |  |  |  | $ (92,428) |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings before subsidiary preferred stock dividends | $ 146,004 |  |  |  |  |  | $ 115,869 |  |  |  |  |  |  |  |  |
Net earnings |  |  |  |  |  |  | 104,417 |  |  |  |  |  | $ 34,535 |  |  |
Total other comprehensive income | 9,950 |  |  |  |  |  | 9,823 |  |  |  |  |  |  |  |  |
Subsidiary preferred stock dividends | (396) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared on common stock |  |  |  |  |  |  |  |  |  |  |  |  | (29,700) |  |  |
Ending balance at Sep. 30, 2017 |  |  |  | (82,501) |  |  |  |  |  | (82,605) |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect adjustment (Note 7) |  |  |  | (11,208) | $ 11,208 |  |  |  |  | (11,208) | $ 11,208 |  |  |  |  |
Balance, as adjusted | 1,761,448 | $ 1,695,253 | $ 1,157,665 | (107,148) | 644,736 | $ 66,195 | 1,488,369 | $ 1,422,174 | $ 1,264,918 | (108,301) | 265,557 | $ 66,195 |  |  |  |
Beginning balance at Dec. 31, 2017 | 1,761,448 | 1,695,253 | 1,157,665 | (95,940) | 633,528 | 66,195 | 1,488,369 | 1,422,174 | 1,264,918 | (97,093) | 254,349 | 66,195 |  |  |  |
Beginning balance TNMP at Dec. 31, 2017 | 1,695,253 |  |  |  |  |  | 1,422,174 |  |  |  |  |  | 634,405 | $ 64 | $ 504,166 | $ 130,175
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings before subsidiary preferred stock dividends | 152,821 | 141,115 |  |  | 141,115 | 11,706 | 123,724 | 112,018 |  |  | 112,018 | 11,706 |  |  |  |
Net earnings |  |  |  |  |  |  | 112,018 |  |  |  |  |  | 40,879 |  |  | 40,879
Total other comprehensive income | 5,668 | 5,668 |  | 5,668 |  |  | 3,780 | 3,780 |  | 3,780 |  |  |  |  |  |
Subsidiary preferred stock dividends | (396) | (396) |  |  | (396) |  |  |  |  |  |  |  |  |  |  |
Dividends declared on preferred stock |  |  |  |  |  |  | (396) | (396) |  |  | (396) |  |  |  |  |
Dividends declared on common stock | (63,325) | (63,325) |  |  | (63,325) |  |  |  |  |  |  |  | (25,804) |  |  | (25,804)
Proceeds from stock option exercise | 937 | 937 | 937 |  |  |  |  |  |  |  |  |  |  |  |  |
Awards of common stock | (12,505) | (12,505) | (12,505) |  |  |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense | 4,551 | 4,551 | 4,551 |  |  |  |  |  |  |  |  |  |  |  |  |
Valencia’s transactions with its owner | (12,677) |  |  |  |  | (12,677) | (12,677) |  |  |  |  | (12,677) |  |  |  |
Ending balance at Sep. 30, 2018 | 1,836,522 | $ 1,771,298 | $ 1,150,648 | $ (101,480) | $ 722,130 | $ 65,224 | 1,602,800 | $ 1,537,576 | $ 1,264,918 | $ (104,521) | $ 377,179 | $ 65,224 |  |  |  |
Ending balance TNMP at Sep. 30, 2018 | $ 1,771,298 |  |  |  |  |  | $ 1,537,576 |  |  |  |  |  | $ 649,480 | $ 64 | $ 504,166 | $ 145,250

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