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v3.19.1

Significant Accounting Policies and Responsibility for Financial Statements (Details) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2019 USD ($) MW | Mar. 31, 2018 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Business Acquisition [Line Items] |  |  |  |
Payment defaults under agreements | $ 0 |  |  |
Dividends declared on common stock | 23,099,000 | $ 21,108,000 |  |
Revenues | 349,645,000 | 317,878,000 |  |
Construction work in progress | 225,485,000 |  | $ 194,427,000 |
Owners' equity | $ 1,684,679,000 |  | 1,688,382,000 |
NMRD |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Renewable energy capacity in operating (in mw) | MW | 33.9 |  |  |
Texas-New Mexico Power Company |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Dividends declared on common stock | $ 10,713,000 | 1,024,000 |  |
Revenues | 80,327,000 | 81,646,000 |  |
Net earnings | 4,098,000 | 9,413,000 |  |
Construction work in progress | 75,332,000 |  | 51,459,000 |
Owners' equity | $ 667,478,000 | 642,794,000 | $ 674,093,000 | $ 634,405,000
PNMR Development | NMRD |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Ownership percentage | 50.00% |  |  |
AEP OnSite Partners | NMRD |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Ownership percentage | 50.00% |  |  |
NMRD |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Revenues | $ 700,000 | 400,000 |  |
Net earnings | (100,000) | 100,000 |  |
Cash | 8,000,000 | 2,600,000 |  |
Construction work in progress | 65,200,000 | 50,800,000 |  |
Accounts payable | 6,100,000 | 200,000 |  |
Owners' equity | 67,100,000 | 53,200,000 |  |
PNMR Development and AEP OnSite | NMRD |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Contribution to construction activities | $ 7,000,000 | $ 5,000,000 |  |

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