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	78,966	71,552			71,552	7,414
Total other comprehensive income (loss)	(170)	(170)		(170)
Subsidiary preferred stock dividends	(264)	(264)			(264)
Dividends declared on common stock	(28,111)	(28,111)			(28,111)
Awards of common stock	(9,953)	(9,953)	(9,953)
Stock based compensation expense	5,712	5,712	5,712
Valencia’s transactions with its owner	(9,256)					(9,256)
Ending balance at Jun. 30, 2021	2,145,398	2,088,231	1,425,700	(79,353)	741,884	57,167
Beginning balance at Mar. 31, 2021	2,088,226	2,030,966	1,425,133	(82,342)	688,175	57,260
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings before subsidiary preferred stock dividends	57,761	53,841			53,841	3,920
Total other comprehensive income (loss)	2,989	2,989		2,989
Subsidiary preferred stock dividends	(132)	(132)			(132)
Awards of common stock	(926)	(926)	(926)
Stock based compensation expense	1,493	1,493	1,493
Valencia’s transactions with its owner	(4,013)					(4,013)
Ending balance at Jun. 30, 2021	2,145,398	2,088,231	1,425,700	(79,353)	741,884	57,167
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	38,341	31,616			31,616	6,725
Total other comprehensive income (loss)	(4,889)	(4,889)		(4,889)
Subsidiary preferred stock dividends	(264)	(264)			(264)
Dividends declared on common stock	(59,656)	(59,656)			(59,656)
Awards of common stock	(7,625)	(7,625)	(7,625)
Stock based compensation expense	4,816	4,816	4,816
Valencia’s transactions with its owner	(7,965)					(7,965)
Ending balance at Jun. 30, 2022	2,185,687	2,131,522	1,426,448	(76,825)	781,899	54,165
Beginning balance at Mar. 31, 2022	2,169,800	2,115,532	1,425,574	(76,580)	766,538	54,268
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings before subsidiary preferred stock dividends	19,123	15,493			15,493	3,630
Total other comprehensive income (loss)	(245)	(245)		(245)
Subsidiary preferred stock dividends	(132)	(132)			(132)
Awards of common stock	(890)	(890)	(890)
Stock based compensation expense	1,764	1,764	1,764
Valencia’s transactions with its owner	(3,733)					(3,733)
Ending balance at Jun. 30, 2022	$ 2,185,687	$ 2,131,522	$ 1,426,448	$ (76,825)	$ 781,899	$ 54,165