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Income Taxes Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Deferred tax assets: |  |
Net operating loss | $ 161,691 | $ 153,858
Regulatory liabilities related to income taxes | 80,031 | 78,858
Federal tax credit carryforwards | 77,417 | 54,748
Shutdown of SJGS Units 2 and 3 | 53,823 | 0
Other | 70,749 | 68,566
Total deferred tax assets | 443,711 | 356,030
Deferred tax liabilities: |  |
Depreciation and plant related | (1,027,047) | (914,926)
Investment tax credit | (56,589) | (36,790)
Regulatory assets related to income taxes | (71,054) | (67,910)
CTC | (16,151) | (19,352)
Pension | (65,226) | (66,498)
Other | (85,037) | (115,282)
Total deferred tax liabilities | (1,321,104) | (1,220,758)
Current accumulated deferred income tax (asset) liability | (877,393) | (864,728)
Non-current accumulated deferred income tax liability | (877,393) | (864,728)
Public Service Company of New Mexico [Member] |  |
Deferred tax assets: |  |
Net operating loss | 116,693 | 108,505
Regulatory liabilities related to income taxes | 75,889 | 74,293
Federal tax credit carryforwards | 57,928 | 35,259
Shutdown of SJGS Units 2 and 3 | 53,823 | 0
Other | 41,210 | 35,681
Total deferred tax assets | 345,543 | 253,738
Deferred tax liabilities: |  |
Depreciation and plant related | (828,926) | (733,519)
Investment tax credit | (56,589) | (36,790)
Regulatory assets related to income taxes | (61,018) | (57,637)
Pension | (58,070) | (58,474)
Other | (37,324) | (70,714)
Total deferred tax liabilities | (1,041,927) | (957,134)
Current accumulated deferred income tax (asset) liability | (696,384) | (703,396)
Non-current accumulated deferred income tax liability | (696,384) | (703,396)
Texas-New Mexico Power Company [Member] |  |
Deferred tax assets: |  |
Regulatory liabilities related to income taxes | 4,141 | 4,565
Other | 6,702 | 13,429
Total deferred tax assets | 10,843 | 17,994
Deferred tax liabilities: |  |
Depreciation and plant related | (189,322) | (174,510)
Regulatory assets related to income taxes | (10,036) | (10,273)
Loss on reacquired debt | (12,392) | (12,846)
CTC | (16,151) | (19,352)
Other | (15,733) | (12,560)
Total deferred tax liabilities | (243,634) | (229,541)
Current accumulated deferred income tax (asset) liability | (232,791) | (211,547)
Non-current accumulated deferred income tax liability | $ (232,791) | $ (211,547)

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