Regulatory Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2012

Public Service Company of New Mexico [Member]

Regulatory Assets [Line Items]

Regulatory Assets and Liabilities [Table Text Block]

PNM

	December 31,
	2012			2011
Assets:	(In thousands)
Current:
Fuel and purchased power adjustment clause	$	36,266		$	41,254
Other	224			3,226
	36,490			44,480
Non-Current:
Coal mine reclamation costs	46,065			51,985
Deferred income taxes	54,781			51,436
Loss on reacquired debt	29,702			31,276
Pension and OPEB	254,351			208,033
Fuel and purchased power adjustment clause	18,619			—
Renewable energy costs	18,768			9,550
Other	9,670			107
	431,956			352,387
Total regulatory assets	$	468,446		$	396,867
Liabilities:
Current:
Other	$	(15,172	)	$	(125	)
Non-Current:
Cost of removal	$	(257,396	)	$	(250,778	)
Deferred income taxes	(49,723		)	(45,323		)
Asset retirement obligations	(39,280		)	(39,979		)
Renewable energy tax benefits	(26,988		)	(27,958		)
Other	(6,454		)	(9,665		)
	(379,841		)	(373,703		)
Total regulatory liabilities	$	(395,013	)	$	(373,828	)

Texas-New Mexico Power Company [Member]

Regulatory Assets [Line Items]

Regulatory Assets and Liabilities [Table Text Block]

TNMP

	December 31,
	2012			2011
Assets:	(In thousands)
Current:
Other	$	2,630		$	513
Non-Current:
Stranded costs	71,240			81,256
Deferred income taxes	11,179			11,491
Pension and OPEB	28,307			18,818
Loss on reacquired debt	1,711			2,852
Hurricane recovery costs	4,572			9,210
Other	6,612			6,141
	123,621			129,768
Total regulatory assets	$	126,251		$	130,281
Liabilities:
Non-Current:
Cost of removal	$	(31,115	)	$	(32,786	)
Deferred income taxes	(5,203		)	(5,843		)
Other	(7,301		)	(5,766		)
Total regulatory liabilities	$	(43,619	)	$	(44,395	)