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Pension and Other Postretirement Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2011

Public Service Company of New Mexico [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

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

	Three Months Ended September 30,
	Pension Plan								Other Postretirement Benefits								Executive Retirement Program
	2011				2010				2011				2010				2011				2010
	(In thousands)
Components of Net Periodic
Benefit Cost
Service cost	$	—			$	—			$	65			$	105			$	—			$	—
Interest cost	8,202				8,518				1,345				1,913				233				263
Long-term return on plan assets	(9,269		)		(9,339		)		(1,347		)		(1,393		)		—				—
Amortization of net loss	2,302				1,613				801				1,372				23				18
Amortization of prior service cost	79				79				(662		)		(1,036		)		—				—
Net periodic benefit cost	$	1,314			$	871			$	202			$	961			$	256			$	281

	Nine Months Ended September 30,
	Pension Plan								Other Postretirement Benefits								Executive Retirement Program
	2011				2010				2011				2010				2011				2010
									(In thousands)
Components of Net Periodic
Benefit Cost
Service cost	$	—			$	—			$	195			$	314			$	—			$	—
Interest cost	24,606				25,555				4,035				5,738				699				790
Long-term return on plan assets	(27,807		)		(28,016		)		(4,041		)		(4,179		)		—				—
Amortization of net loss	6,906				4,838				2,403				4,116				69				53
Amortization of prior service cost	237				238				(1,986		)		(3,107		)		—				—
Net periodic benefit cost	$	3,942			$	2,615			$	606			$	2,882			$	768			$	843

Texas-New Mexico Power Company [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

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

	Three Months Ended September 30,
	Pension Plan								Other Postretirement Benefits								Executive Retirement Program
	2011				2010				2011				2010				2011				2010
									(In thousands)
Components of Net Periodic
Benefit Cost (Income)
Service cost	$	—			$	—			$	77			$	72			$	—			$	—
Interest cost	951				1,032				163				178				12				13
Long-term return on plan assets	(1,368		)		(1,449		)		(133		)		(129		)		—				—
Amortization of net (gain) loss	86				—				(48		)		(49		)		—				(1		)
Amortization of prior service cost	—				—				15				15				—				—
Net Periodic Benefit Cost (Income)	$	(331	)		$	(417	)		$	74			$	87			$	12			$	12

	Nine Months Ended September 30,
	Pension Plan								Other Postretirement Benefits								Executive Retirement Program
	2011				2010				2011				2010				2011				2010
									(In thousands)
Components of Net Periodic
Benefit Cost (Income)
Service cost	$	—			$	—			$	231			$	217			$	—			$	—
Interest cost	2,853				3,095				489				533				36				39
Long-term return on plan assets	(4,104		)		(4,346		)		(399		)		(386		)		—				—
Amortization of net (gain) loss	258				—				(144		)		(147		)		—				(3		)
Amortization of prior service cost	—				—				45				45				—				—
Net Periodic Benefit Cost (Income)	$	(993	)		$	(1,251	)		$	222			$	262			$	36			$	36

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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X

- 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

-Topic 715

-SubTopic 20

-Publisher FASB

-Number

-Article

-Subparagraph (h)

-Name Accounting Standards Codification

-Paragraph 1

-Section 50

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

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