Condensed Consolidated Statements of Comprehensive Income - PNMR - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net Earnings	$ 126,737	$ 117,682	$ 165,078	$ 196,648
Unrealized Gains on Available-for-Sale Debt Securities:
Net change in unrealized holding gains arising during the period, net of income tax (expense) benefit of $(326), $329, $2,075, and $246	956	(968)	(6,095)	(722)
Reclassification adjustment for (gains) included in net earnings, net of income tax expense of $129, $632, $870, and $2,062	(380)	(1,856)	(2,556)	(6,058)
Pension Liability Adjustment:
Reclassification adjustment for amortization of experience losses recognized as net periodic benefit cost, net of income tax (benefit) of $(451), $(530), $(1,353), and $(1,590)	1,325	1,557	3,975	4,671
Fair Value Adjustment for Cash Flow Hedges:
Change in fair market value, net of income tax (expense) of $(1,764), $0, $(2,640), and $(458)	5,179	0	7,751	1,346
Reclassification adjustment for (gains) included in net earnings, net of income tax expense of $148, $0, $449, and $229	(434)	0	(1,318)	(674)
Total Other Comprehensive Income (Loss)	6,646	(1,267)	1,757	(1,437)
Comprehensive Income	133,383	116,415	166,835	195,211
Comprehensive (Income) Attributable to Valencia Non-controlling Interest	(4,172)	(4,229)	(10,897)	(11,643)
Preferred Stock Dividend Requirements of Subsidiary	(132)	(132)	(396)	(396)
Comprehensive Income Attributable to PNM	$ 129,079	$ 112,054	$ 155,542	$ 183,172