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Consolidated Statements of Changes in Equity - USD ($) $ in Thousands | Total | Total Stockholders' Equity | Common Stock | AOCI | Retained Earnings | Non- controlling Interest in Valencia | Public Service Company of New Mexico | Public Service Company of New Mexico Total Stockholders' Equity | Public Service Company of New Mexico Common Stock | Public Service Company of New Mexico AOCI | Public Service Company of New Mexico Retained Earnings | Public Service Company of New Mexico 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
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2014 | $ 1,795,092 | $ 1,721,546 | $ 1,173,845 | $ (61,755) | $ 609,456 | $ 73,546 | $ 1,336,402 | $ 1,262,856 | $ 1,061,776 | $ (61,755) | $ 262,835 | $ 73,546 |  |  |  |
Beginning Balance at Dec. 31, 2014 |  |  |  | (61,755) |  |  |  |  |  | (61,755) |  |  | $ 524,665 | $ 64 | $ 404,166 | $ 120,435
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings | 31,078 | 16,168 |  |  | 16,168 | 14,910 | (324) | (15,234) |  |  | (15,234) | 14,910 |  |  |  |
Net Earnings | 15,640 |  |  |  |  |  | (15,234) |  |  |  |  |  | 41,963 |  |  | 41,963
Total other comprehensive income (loss) | (9,677) | (9,677) |  | (9,677) |  |  | (9,721) | (9,721) |  | (9,721) |  |  |  |  |  |
Equity contribution from parent |  |  |  |  |  |  | 175,000 |  |  |  |  |  | 0 |  |  |
Subsidiary preferred stock dividends/dividends declared on preferred stock | (528) | (528) |  |  | (528) |  | (528) | (528) |  |  | (528) |  |  |  |  |
Dividends declared on common stock | (65,316) | (65,316) |  |  | (65,316) |  | (94,440) | (94,440) |  |  | (94,440) |  | (33,248) |  |  | (33,248)
Proceeds from stock option exercise | 5,619 | 5,619 | 5,619 |  |  |  |  |  |  |  |  |  |  |  |  |
Awards of common stock | (17,720) | (17,720) | (17,720) | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |
Excess tax (shortfall) from stock-based payment arrangements | (142) | (142) | (142) |  |  |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense | 4,863 | 4,863 | 4,863 |  |  |  |  |  |  |  |  |  |  |  |  |
Valencia’s transactions with its owner | (17,049) |  |  |  |  | (17,049) | (17,049) |  |  |  |  |  |  |  |  |
Equity contributions from parent |  |  |  |  |  |  | 175,000 | 175,000 | 175,000 | 0 | 0 |  |  |  |  |
Balance at Dec. 31, 2015 | 1,726,220 | 1,654,813 | 1,166,465 | (71,432) | 559,780 | 71,407 | 1,389,340 | 1,317,933 | 1,236,776 | (71,476) | 152,633 | 71,407 |  |  |  |
Ending Balance at Dec. 31, 2015 |  |  |  | (71,432) |  |  |  |  |  | (71,476) |  |  | 533,380 | 64 | 404,166 | 129,150
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings | 131,896 | 117,377 |  |  | 117,377 | 14,519 | 91,938 | 77,419 |  |  | 77,419 | 14,519 |  |  |  |
Net Earnings | 116,849 |  |  |  |  |  | 77,419 |  |  |  |  |  | 41,672 |  |  | 41,672
Total other comprehensive income (loss) | (21,019) | (21,019) |  | (21,019) |  |  | (20,952) | (20,952) |  | (20,952) |  |  |  |  |  |
Equity contribution from parent |  |  |  |  |  |  | 28,142 |  |  |  |  |  | 50,000 |  | 50,000 |
Subsidiary preferred stock dividends/dividends declared on preferred stock | (528) | (528) |  |  | (528) |  | (528) | (528) |  |  | (528) |  |  |  |  |
Dividends declared on common stock | (71,887) | (71,887) |  |  | (71,887) |  | (4,142) | (4,142) |  |  | (4,142) |  | (31,817) |  |  | (31,817)
Proceeds from stock option exercise | 7,028 | 7,028 | 7,028 |  |  |  |  |  |  |  |  |  |  |  |  |
Awards of common stock | (15,451) | (15,451) | (15,451) | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |
Excess tax (shortfall) from stock-based payment arrangements | (15) | (15) | (15) |  |  |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense | 5,634 | 5,634 | 5,634 |  |  |  |  |  |  |  |  |  |  |  |  |
Valencia’s transactions with its owner | (17,006) |  |  |  |  | (17,006) | (17,006) |  |  |  |  |  |  |  |  |
Equity contributions from parent |  |  |  |  |  |  | 28,142 | 28,142 | 28,142 |  |  |  |  |  |  |
Balance at Dec. 31, 2016 | 1,744,872 | 1,675,952 | 1,163,661 | (92,451) | 604,742 | 68,920 | 1,466,792 | 1,397,872 | 1,264,918 | (92,428) | 225,382 | 68,920 |  |  |  |
Ending Balance at Dec. 31, 2016 | 1,675,952 |  |  | (92,451) |  |  | 1,397,872 |  |  | (92,428) |  |  | 593,235 | 64 | 454,166 | 139,005
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect adjustment (Note 13) | Accounting Standards Update 2016-09 | 10,382 | 10,382 |  |  | 10,382 |  |  |  |  |  |  |  |  |  |  |
Balance at January 1, 2017, as adjusted | 1,755,254 | 1,686,334 | 1,163,661 | (92,451) | 615,124 | 68,920 |  |  |  |  |  |  |  |  |  |
Reclassification of stranded income taxes resulting from tax reform (Note 11) | (17,586) |  |  | (17,586) | 17,586 |  | (17,794) |  |  | (17,794) | 17,794 |  |  |  |  |
Net earnings | 95,419 | 80,402 |  |  | 80,402 | 15,017 | 87,413 | 72,396 |  |  | 72,396 | 15,017 |  |  |  |
Net Earnings | 79,874 |  |  |  |  |  | 72,396 |  |  |  |  |  | 35,559 |  |  | 35,559
Total other comprehensive income (loss) | 14,097 | 14,097 |  | 14,097 | 0 |  | 13,129 | 13,129 |  | 13,129 |  |  |  |  |  |
Equity contribution from parent |  |  |  |  |  |  | 0 |  |  |  |  |  | 50,000 |  | 50,000 |
Subsidiary preferred stock dividends/dividends declared on preferred stock | (528) | (528) |  |  | (528) |  | (528) | (528) |  |  | (528) |  |  |  |  |
Dividends declared on common stock | (79,056) | (79,056) |  |  | (79,056) |  | (60,695) | (60,695) |  |  | (60,695) |  | (44,389) |  |  | (44,389)
Proceeds from stock option exercise | 1,739 | 1,739 | 1,739 |  |  |  |  |  |  |  |  |  |  |  |  |
Awards of common stock | (13,929) | (13,929) | (13,929) | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |
Stock based compensation expense | 6,194 | 6,194 | 6,194 |  |  |  |  |  |  |  |  |  |  |  |  |
Valencia’s transactions with its owner | (17,742) |  |  |  |  | (17,742) | (17,742) |  |  |  |  |  |  |  |  |
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 |  |  |  |
Ending Balance at Dec. 31, 2017 | $ 1,695,253 |  |  | $ (95,940) |  |  | $ 1,422,174 |  |  | $ (97,093) |  |  | $ 634,405 | $ 64 | $ 504,166 | $ 130,175

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