Accumulated Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 2018

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

Information regarding accumulated other comprehensive income (loss) for the nine months ended September 30, 2018 and 2017 is as follows:

	Accumulated Other Comprehensive Income (Loss)
	PNM									PNMR
	Unrealized									Fair Value
	Gains on									Adjustment
	Available-for-			Pension						for Cash
	Sale			Liability						Flow
	Securities			Adjustment			Total			Hedges			Total
	(In thousands)
Balance at December 31, 2017, as originally reported	$	13,169		$	(110,262	)	$	(97,093	)	$	1,153		$	(95,940	)
Cumulative effect adjustment (Note 7)	(11,208		)	—			(11,208		)	—			(11,208		)
Balance at January 1, 2018, as adjusted	1,961			(110,262		)	(108,301		)	1,153			(107,148		)
Amounts reclassified from AOCI (pre-tax)	(3,483		)	5,678			2,195			102			2,297
Income tax impact of amounts reclassified	885			(1,442		)	(557		)	(27		)	(584		)
Other OCI changes (pre-tax)	2,872			—			2,872			2,431			5,303
Income tax impact of other OCI changes	(730		)	—			(730		)	(618		)	(1,348		)
Net after-tax change	(456		)	4,236			3,780			1,888			5,668
Balance at September 30, 2018	$	1,505		$	(106,026	)	$	(104,521	)	$	3,041		$	(101,480	)

Balance at December 31, 2016	$	4,320		$	(96,748	)	$	(92,428	)	$	(23	)	$	(92,451	)
Amounts reclassified from AOCI (pre-tax)	(11,088		)	4,839			(6,249		)	484			(5,765		)
Income tax impact of amounts reclassified	4,302			(1,878		)	2,424			(187		)	2,237
Other OCI changes (pre-tax)	22,302			—			22,302			(278		)	22,024
Income tax impact of other OCI changes	(8,654		)	—			(8,654		)	108			(8,546		)
Net after-tax change	6,862			2,961			9,823			127			9,950
Balance at September 30, 2017	$	11,182		$	(93,787	)	$	(82,605	)	$	104		$	(82,501	)