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v3.3.0.814

Variable Interest Entities (Details) | 1 Months Ended | 3 Months Ended | 7 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jul. 17, 2014 USD ($) | Sep. 30, 2015 USD ($) MW | Sep. 30, 2014 USD ($) | Jul. 17, 2014 USD ($) | Sep. 30, 2015 USD ($) MW | Sep. 30, 2014 USD ($) | Dec. 31, 2014 USD ($) | Oct. 08, 2013 USD ($)
Variable Interest Entity, Statement Of Operation [Abstract] |  |  |  |  |  |  |  |
Earnings attributable to non-controlling interest |  | $ 3,678,000 | $ 3,701,000 |  | $ 10,909,000 | $ 11,140,000 |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] |  |  |  |  |  |  |  |
Current assets |  | 407,985,000 |  |  | 407,985,000 |  | $ 432,817,000 |
Total assets |  | 6,052,852,000 | 5,709,209,000 |  | 6,052,852,000 | 5,709,209,000 | 5,829,325,000 |
Current liabilities |  | 518,587,000 |  |  | 518,587,000 |  | 704,282,000 |
Owners’ equity – non-controlling interest |  | 72,348,000 |  |  | $ 72,348,000 |  | 73,546,000 |
Public Service Company of New Mexico [Member] |  |  |  |  |  |  |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] |  |  |  |  |  |  |  |
Option to renew leases at fixed rate, number of years |  |  |  |  | 2 years |  |  |
Option to extend period on certain leases, number of years |  |  |  |  | 6 years |  |  |
Public Service Company of New Mexico [Member] | Palo Verde Nuclear Generating Station [Member] |  |  |  |  |  |  |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] |  |  |  |  |  |  |  |
Operating Leases, Future Minimum Payments Due, Next Twelve Months |  | 8,400,000 |  |  | $ 8,400,000 |  | 26,000,000 |
Public Service Company of New Mexico [Member] | Palo Verde Nuclear Generating Station [Member] | Property Lease Guarantee [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] |  |  |  |  |  |  |  |
Loss contingency, range of possible loss, portion not accrued |  | 205,800,000.0 |  |  | 205,800,000.0 |  |  |
Public Service Company of New Mexico [Member] | Valencia [Member] |  |  |  |  |  |  |  |
Variable Interest Entity, Statement Of Operation [Abstract] |  |  |  |  |  |  |  |
Operating revenues |  | 5,182,000 | 5,061,000 |  | 15,337,000 | 15,300,000 |  |
Operating expenses |  | (1,504,000) | (1,360,000) |  | (4,428,000) | (4,160,000) |  |
Earnings attributable to non-controlling interest |  | 3,678,000 | 3,701,000 |  | 10,909,000 | 11,140,000 |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] |  |  |  |  |  |  |  |
Current assets |  | 3,410,000 |  |  | 3,410,000 |  | 2,513,000 |
Net property, plant, and equipment |  | 70,471,000 |  |  | 70,471,000 |  | 72,321,000 |
Total assets |  | 73,881,000 |  |  | 73,881,000 |  | 74,834,000 |
Current liabilities |  | 1,533,000 |  |  | 1,533,000 |  | 1,288,000 |
Owners’ equity – non-controlling interest |  | 72,348,000 |  |  | 72,348,000 |  | $ 73,546,000 |
Payment for fixed costs |  | 4,900,000 | 4,800,000 |  | 14,500,000 | 14,400,000 |  |
Payment for variable costs |  | $ 300,000 | $ 300,000 |  | $ 900,000 | $ 1,000,000 |  |
Long term contract option to purchase, ownership percentage |  | 50.00% |  |  |  |  |  |
Long term contract option to purchase, purchase price - percentage of adjusted NBV |  | 50.00% |  |  |  |  |  |
Long term contract option to purchase, purchase price - percentage of FMV |  | 50.00% |  |  |  |  |  |
Long term contract option to purchase, number of days to set FMV |  | 60 days |  |  |  |  |  |
Long term contract option to purchase, estimated purchase price |  |  |  |  |  |  |  | $ 85,000,000
Long term contract option to purchase, approximate approval period |  | 15 months |  |  |  |  |  |
Public Service Company of New Mexico [Member] | Valencia [Member] | Purchased Through May 30, 2028 [Member] |  |  |  |  |  |  |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] |  |  |  |  |  |  |  |
Number of mega watts purchased (in megawatts) | MW |  | 158 |  |  | 158 |  |  |
Public Service Company of New Mexico [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |  |  |  |  |  |  |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] |  |  |  |  |  |  |  |
Operating leases, future minimum payments due, renewal term |  | $ 140,100,000 |  |  | $ 140,100,000 |  |  |
Public Service Company of New Mexico [Member] | Delta [Member] |  |  |  |  |  |  |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] |  |  |  |  |  |  |  |
Payment for fixed costs | $ 300,000 |  |  | $ 3,500,000 |  |  |  |
Payment for variable costs | $ 100,000 |  |  | $ 600,000 |  |  |  |
Period of long term contract for purchase of electric power fixed costs |  |  |  |  | 20 years |  |  |

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