Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2023

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Reclassification out of Accumulated Other Comprehensive Income

Information regarding AOCI is as follows:

	Accumulated Other Comprehensive Income (Loss)
	PNM						PNMR
	Unrealized Gains on Available-for-Sale Securities		Pension Liability Adjustment		Total		Fair Value Adjustment for Cash Flow Hedges		Total
	(In thousands)
Balance at December 31, 2020	$	20,403	$	(98,914)	$	(78,511)	$	(672)	$	(79,183)
Amounts reclassified from AOCI (pre-tax)	(9,765)		8,348		(1,417)		(903)		(2,320)
Income tax impact of amounts reclassified	2,480		(2,120)		360		229		589
Other OCI changes (pre-tax)	(1,881)		12,111		10,230		1,804		12,034
Income tax impact of other OCI changes	478		(3,076)		(2,598)		(458)		(3,056)
Net after-tax change	(8,688)		15,263		6,575		672		7,247
Balance at December 31, 2021	11,715		(83,651)		(71,936)		—		(71,936)
Amounts reclassified from AOCI (pre-tax)	(3,827)		7,104		3,277		(1,176)		2,101
Income tax impact of amounts reclassified	972		(1,804)		(832)		299		(533)
Other OCI changes (pre-tax)	(1,928)		(4,565)		(6,493)		12,285		5,792
Income tax impact of other OCI changes	490		1,159		1,649		(3,121)		(1,472)
Net after-tax change	(4,293)		1,894		(2,399)		8,287		5,888
Balance at December 31, 2022	7,422		(81,757)		(74,335)		8,287		(66,048)
Amounts reclassified from AOCI (pre-tax)	(7,199)		4,776		(2,423)		9,287		6,864
Income tax impact of amounts reclassified	1,828		(1,212)		616		(2,359)		(1,743)
Other OCI changes (pre-tax)	11,529		1,389		12,918		(15,483)		(2,565)
Income tax impact of other OCI changes	(2,928)		(353)		(3,281)		3,933		652
Net after-tax change	3,230		4,600		7,830		(4,622)		3,208
Balance at December 31, 2023	$	10,652	$	(77,157)	$	(66,505)	$	3,665	$	(62,840)

The following table presents pre-tax information about net actuarial (gain) loss in AOCI as of December 31, 2023.

	PNM		TNMP
	(In thousands)
Amounts in AOCI not yet recognized in net periodic benefit cost (income) at beginning of year	$	110,345	$	—
Experience (gain) loss	(6,193)		1,005
Regulatory asset (liability) adjustment	4,629		(1,005)
Amortization recognized in net periodic benefit (income)	(4,713)		—
Amounts in AOCI not yet recognized in net periodic benefit cost at end of year	$	104,068	$	—

The following table presents pre-tax information about net actuarial loss in AOCI as of December 31, 2023.

	December 31, 2023
	PNM		TNMP
	(In thousands)
Amount in AOCI not yet recognized in net periodic benefit cost at beginning of year	$	995	$	—
Experience (gain)	411		13
Regulatory asset adjustment	(238)		(13)
Amortization recognized in net periodic benefit (income)	(64)		—
Amount in AOCI not yet recognized in net periodic benefit cost at end of year	$	1,104	$	—