Consolidated Statements of Changes in Equity - PNM - USD ($) $ in Thousands	Total	Total Stockholders' Equity	Common Stock	AOCI	Retained Earnings	Non- controlling Interest in Valencia	PNM	PNM Total Stockholders' Equity	PNM Common Stock	PNM AOCI	PNM Retained Earnings	PNM 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	$ 1,863,752	$ 1,804,743	$ 1,494,918	$ (78,511)	$ 388,336	$ 59,009
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	211,847	196,357			196,357	15,490	171,559	156,069			156,069	15,490
Total other comprehensive income	7,247	7,247		7,247			6,575	6,575		6,575
Subsidiary preferred stock dividends	(528)	(528)			(528)		(528)	(528)			(528)
Equity contribution from parent							53,000	53,000	53,000
Dividends declared on common stock	(84,333)	(84,333)			(84,333)		(60,000)	(60,000)			(60,000)
Valencia’s transactions with its owner	(19,094)					(19,094)	(19,094)					(19,094)
Ending Balance at Dec. 31, 2021	2,222,929	2,167,524	1,429,257	(71,936)	810,203	55,405	2,015,264	1,959,859	1,547,918	(71,936)	483,877	55,405
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	185,180	170,058			170,058	15,122	119,020	103,898			103,898	15,122
Total other comprehensive income	5,888	5,888		5,888			(2,399)	(2,399)		(2,399)
Subsidiary preferred stock dividends	(528)	(528)			(528)		(528)	(528)			(528)
Dividends declared on common stock	(150,855)	(150,855)			(150,855)		(153,500)	(153,500)			(153,500)
Valencia’s transactions with its owner	(17,533)					(17,533)	(17,533)					(17,533)
Ending Balance at Dec. 31, 2022	2,244,926	2,191,932	1,429,102	(66,048)	828,878	52,994	1,960,324	1,907,330	1,547,918	(74,335)	433,747	52,994
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	106,879	88,346			88,346	18,533	54,718	36,185			36,185	18,533
Total other comprehensive income	3,208	3,208		3,208			7,830	7,830		7,830
Subsidiary preferred stock dividends	(528)	(528)			(528)		(528)	(528)			(528)
Dividends declared on common stock	(129,586)	(129,586)			(129,586)		0	0			0
Valencia’s transactions with its owner	(21,569)					(21,569)	(21,569)					(21,569)
Ending Balance at Dec. 31, 2023	$ 2,399,051	$ 2,349,093	$ 1,624,823	$ (62,840)	$ 787,110	$ 49,958	$ 2,000,775	$ 1,950,817	$ 1,547,918	$ (66,505)	$ 469,404	$ 49,958