Condensed Consolidated Statements of Comprehensive Income - PNMR - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net Earnings	$ 42,916	$ 126,737	$ 152,613	$ 165,078
Unrealized Gains on Available-for-Sale Debt Securities:
Net increase (decrease) in unrealized holding gains arising during the period, net of income tax (expense) benefit of $526, $(326), $(632) and $2,075	(1,543)	956	1,859	(6,095)
Reclassification adjustment for (gains) included in net earnings, net of income tax expense of $389, $129, $1,044, and $870	(1,142)	(380)	(3,067)	(2,556)
Pension Liability Adjustment:
Reclassification adjustment for amortization of experience losses recognized as net periodic benefit cost, net of income tax (benefit) of $(303), $(451), $(909), and $(1,353)	891	1,325	2,673	3,975
Fair Value Adjustment for Cash Flow Hedges:
Change in fair market value, net of income tax (expense) of $1,512, $(1,764), $606, and $(2,640)	(4,441)	5,179	(1,780)	7,751
Reclassification adjustment for gains (losses) included in net earnings, net of income tax (expense) benefit of $(1,039), $148, $(1,343), and $449	3,050	(434)	3,943	(1,318)
Total Other Comprehensive Income (Loss)	(3,185)	6,646	3,628	1,757
Comprehensive Income	39,731	133,383	156,241	166,835
Comprehensive (Income) Attributable to Valencia Non-controlling Interest	(5,058)	(4,172)	(14,172)	(10,897)
Preferred Stock Dividend Requirements of Subsidiary	(132)	(132)	(396)	(396)
Comprehensive Income Attributable to PNM	$ 34,541	$ 129,079	$ 141,673	$ 155,542