Accumulated Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 2021

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

Information regarding accumulated other comprehensive income (loss) for the nine months ended September 30, 2021 and 2020 is as follows:

	Accumulated Other Comprehensive Income (Loss)
	PNM						Corporate and Other		PNMR Consolidated
	Unrealized Gains on Available-for-Sale Debt Securities		Pension Liability Adjustment				Fair Value Adjustment for Cash Flow Hedges
					Total				Total
	(In thousands)
Balance at December 31, 2020	$	20,403	$	(98,914)	$	(78,511)	$	(672)	$	(79,183)
Amounts reclassified from AOCI (pre-tax)	(8,120)		6,261		(1,859)		(903)		(2,762)
Income tax impact of amounts reclassified	2,062		(1,590)		472		229		701
Other OCI changes (pre-tax)	(968)		—		(968)		1,804		836
Income tax impact of other OCI changes	246		—		246		(458)		(212)
Net after-tax change	(6,780)		4,671		(2,109)		672		(1,437)
Balance at September 30, 2021	$	13,623	$	(94,243)	$	(80,620)	$	—	$	(80,620)

Balance at December 31, 2019	$	10,638	$	(109,693)	$	(99,055)	$	(322)	$	(99,377)
Amounts reclassified from AOCI (pre-tax)	(7,156)		6,225		(931)		(1,117)		(2,048)
Income tax impact of amounts reclassified	1,818		(1,581)		237		284		521
Other OCI changes (pre-tax)	14,750		—		14,750		33		14,783
Income tax impact of other OCI changes	(3,746)		—		(3,746)		(9)		(3,755)
Net after-tax change	5,666		4,644		10,310		(809)		9,501
Balance at September 30, 2020	$	16,304	$	(105,049)	$	(88,745)	$	(1,131)	$	(89,876)