Accumulated Other Comprehensive Income (Loss) (Tables)

6 Months Ended

Jun. 30, 2018

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

Information regarding accumulated other comprehensive income (loss) for the six months ended June 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)	(3,126		)	3,788			662			(7		)	655
Income tax impact of amounts reclassified	794			(962		)	(168		)	1			(167		)
Other OCI changes (pre-tax)	1,472			—			1,472			2,420			3,892
Income tax impact of other OCI changes	(374		)	—			(374		)	(615		)	(989		)
Net after-tax change	(1,234		)	2,826			1,592			1,799			3,391
Balance at June 30, 2018	$	727		$	(107,436	)	$	(106,709	)	$	2,952		$	(103,757	)

Balance at December 31, 2016	$	4,320		$	(96,748	)	$	(92,428	)	$	(23	)	$	(92,451	)
Amounts reclassified from AOCI (pre-tax)	(6,961		)	3,226			(3,735		)	323			(3,412		)
Income tax impact of amounts reclassified	2,701			(1,252		)	1,449			(125		)	1,324
Other OCI changes (pre-tax)	14,903			—			14,903			(288		)	14,615
Income tax impact of other OCI changes	(5,783		)	—			(5,783		)	112			(5,671		)
Net after-tax change	4,860			1,974			6,834			22			6,856
Balance at June 30, 2017	$	9,180		$	(94,774	)	$	(85,594	)	$	(1	)	$	(85,595	)