Pension and Other Postretirement Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2013

Public Service Company of New Mexico [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

The following tables present the components of the PNM Plans' net periodic benefit cost:

	Three Months Ended September 30,
	Pension Plan						OPEB Plan						Executive Retirement Program
	2013			2012			2013			2012			2013		2012
	(In thousands)
Components of Net Periodic
Benefit Cost
Service cost	$	—		$	—		$	65		$	54		$	—	$	—
Interest cost	7,035			8,058			1,029			1,324			180		219
Expected return on plan assets	(10,482		)	(10,325		)	(1,261		)	(1,225		)	—		—
Amortization of net (gain) loss	3,710			2,629			1,061			972			58		21
Amortization of prior service cost	19			79			(336		)	(336		)	—		—
Net periodic benefit cost	$	282		$	441		$	558		$	789		$	238	$	240
	Nine Months Ended September 30,
	Pension Plan						OPEB Plan						Executive Retirement Program
	2013			2012			2013			2012			2013		2012
	(In thousands)
Components of Net Periodic
Benefit Cost
Service cost	$	—		$	—		$	195		$	162		$	—	$	—
Interest cost	21,106			24,174			3,085			3,972			540		657
Expected return on plan assets	(31,447		)	(30,975		)	(3,782		)	(3,675		)	—		—
Amortization of net (gain) loss	11,130			7,887			3,182			2,916			174		63
Amortization of prior service cost	57			237			(1,008		)	(1,008		)	—		—
Net periodic benefit cost	$	846		$	1,323		$	1,672		$	2,367		$	714	$	720

Texas-New Mexico Power Company [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

The following tables present the components of the TNMP Plans' net periodic benefit cost (income):

	Three Months Ended September 30,
	Pension Plan						OPEB Plan						Executive Retirement Program
	2013			2012			2013			2012			2013		2012
	(In thousands)
Components of Net Periodic
Benefit Cost (Income)
Service cost	$	—		$	—		$	75		$	61		$	—	$	—
Interest cost	772			909			141			156			9		11
Expected return on plan assets	(1,212		)	(1,331		)	(126		)	(129		)	—		—
Amortization of net (gain) loss	262			115			—			(52		)	—		—
Amortization of prior service cost	—			—			14			14			—		—
Net Periodic Benefit Cost (Income)	$	(178	)	$	(307	)	$	104		$	50		$	9	$	11
	Nine Months Ended September 30,
	Pension Plan						OPEB Plan						Executive Retirement Program
	2013			2012			2013			2012			2013		2012
	(In thousands)
Components of Net Periodic
Benefit Cost (Income)
Service cost	$	—		$	—		$	225		$	183		$	—	$	—
Interest cost	2,315			2,727			424			468			27		33
Expected return on plan assets	(3,637		)	(3,993		)	(377		)	(387		)	—		—
Amortization of net (gain) loss	787			345			—			(156		)	—		—
Amortization of prior service cost	—			—			43			42			—		—
Net Periodic Benefit Cost (Income)	$	(535	)	$	(921	)	$	315		$	150		$	27	$	33