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Pension and Other Postretirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2018

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

The following table presents the components of the TNMP Plans’ net periodic benefit cost:

	Three Months Ended March 31,
	Pension Plan								OPEB Plan								Executive Retirement Program
	2018				2017				2018				2017				2018				2017
	(In thousands)
Components of Net Periodic Benefit Cost
Service cost	$	—			$	—			$	33			$	36			$	—			$	—
Interest cost	656				722				119				139				7				8
Expected return on plan assets	(991		)		(945		)		(135		)		(114		)		—				—
Amortization of net (gain) loss	272				231				(56		)		(20		)		4				2
Amortization of prior service cost	—				—				—				—				—				—
Net Periodic Benefit Cost	$	(63	)		$	8			$	(39	)		$	41			$	11			$	10

The following table presents the components of the PNM Plans’ net periodic benefit cost:

	Three Months Ended March 31,
	Pension Plan								OPEB Plan								Executive Retirement Program
	2018				2017				2018				2017				2018				2017
	(In thousands)
Components of Net Periodic Benefit Cost
Service cost	$	—			$	—			$	21			$	24			$	—			$	—
Interest cost	6,068				6,727				860				1,006				155				174
Expected return on plan assets	(8,672		)		(8,451		)		(1,353		)		(1,308		)		—				—
Amortization of net (gain) loss	4,087				4,001				588				921				90				78
Amortization of prior service cost	(241		)		(241		)		(416		)		(416		)		—				—
Net periodic benefit cost	$	1,242			$	2,036			$	(300	)		$	227			$	245			$	252

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- References

No definition available.

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- Definition

Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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