Condensed Consolidated Statements of Changes in Equity - PNMR - USD ($) $ in Thousands	Total	Total PNMR Common Stockholders’ Equity	Common Stock	AOCI	Retained Earnings	Non- controlling Interest in Valencia
Beginning balance at Dec. 31, 2020	$ 2,108,474	$ 2,049,465	$ 1,429,941	$ (79,183)	$ 698,707	$ 59,009
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings before subsidiary preferred stock dividends	196,648	185,005			185,005	11,643
Total other comprehensive income (loss)	(1,437)	(1,437)		(1,437)
Subsidiary preferred stock dividends	(396)	(396)			(396)
Dividends declared on common stock	(84,333)	(84,333)			(84,333)
Awards of common stock	(10,082)	(10,082)	(10,082)
Stock based compensation expense	6,728	6,728	6,728
Valencia’s transactions with its owner	(14,238)					(14,238)
Ending balance at Sep. 30, 2021	2,201,364	2,144,950	1,426,587	(80,620)	798,983	56,414
Beginning balance at Jun. 30, 2021	2,145,398	2,088,231	1,425,700	(79,353)	741,884	57,167
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings before subsidiary preferred stock dividends	117,682	113,453			113,453	4,229
Total other comprehensive income (loss)	(1,267)	(1,267)		(1,267)
Subsidiary preferred stock dividends	(132)	(132)			(132)
Dividends declared on common stock	(56,222)	(56,222)			(56,222)
Awards of common stock	(129)	(129)	(129)
Stock based compensation expense	1,016	1,016	1,016
Valencia’s transactions with its owner	(4,982)					(4,982)
Ending balance at Sep. 30, 2021	2,201,364	2,144,950	1,426,587	(80,620)	798,983	56,414
Beginning balance at Dec. 31, 2021	2,222,929	2,167,524	1,429,257	(71,936)	810,203	55,405
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings before subsidiary preferred stock dividends	165,078	154,181			154,181	10,897
Total other comprehensive income (loss)	1,757	1,757		1,757
Subsidiary preferred stock dividends	(396)	(396)			(396)
Dividends declared on common stock	(119,311)	(119,311)			(119,311)
Awards of common stock	(7,846)	(7,846)	(7,846)
Stock based compensation expense	5,972	5,972	5,972
Valencia’s transactions with its owner	(12,455)					(12,455)
Ending balance at Sep. 30, 2022	2,255,728	2,201,881	1,427,383	(70,179)	844,677	53,847
Beginning balance at Jun. 30, 2022	2,185,687	2,131,522	1,426,448	(76,825)	781,899	54,165
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings before subsidiary preferred stock dividends	126,737	122,565			122,565	4,172
Total other comprehensive income (loss)	6,646	6,646		6,646
Subsidiary preferred stock dividends	(132)	(132)			(132)
Dividends declared on common stock	(59,655)	(59,655)			(59,655)
Awards of common stock	(221)	(221)	(221)
Stock based compensation expense	1,156	1,156	1,156
Valencia’s transactions with its owner	(4,490)					(4,490)
Ending balance at Sep. 30, 2022	$ 2,255,728	$ 2,201,881	$ 1,427,383	$ (70,179)	$ 844,677	$ 53,847