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Financing - Long-term Debt Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Long-term Debt, by Maturity [Abstract]
2021	$ 576,000
2022	619,500
2023	285,345
2024	205,000
2025	354,000
Thereafter	1,254,198
Total	3,294,043	$ 3,004,043
PNMR
Long-term Debt, by Maturity [Abstract]
2021	230,000
2022	515,000
2023	0
2024	0
2025	0
Thereafter	0
Total	745,000	590,000
Public Service Company of New Mexico
Long-term Debt, by Maturity [Abstract]
2021	346,000
2022	104,500
2023	285,345
2024	125,000
2025	354,000
Thereafter	491,000
Total	1,705,845	1,755,845
Texas-New Mexico Power Company
Long-term Debt, by Maturity [Abstract]
2021	0
2022	0
2023	0
2024	80,000
2025	0
Thereafter	763,198
Total	$ 843,198	$ 658,198

X

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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