Financing (Tables)

12 Months Ended

Dec. 31, 2011

Debt Disclosure [Abstract]

Schedule of Short-term Debt [Table Text Block]

Short-term debt outstanding consists of:

	December 31,
Short-term Debt	2011		2010
	(In thousands)
PNM Revolving credit facility	$	66,000	$	190,000
TNMP Revolving credit facility	—		—
PNMR
Revolving credit facility	16,700		32,000
Local lines of credit	—		—
	$	82,700	$	222,000

Schedule of Long-term Debt Instruments [Table Text Block]

Information concerning long-term debt outstanding is as follows:

	December 31,
Long-term Debt	2011			2010
	(In thousands)
PNM Debt
Senior Unsecured Notes, Pollution Control Revenue Bonds:
4.875% due 2033	$	146,000		$	146,000
5.15% due 2037	20,000			20,000
6.25% due 2038	36,000			36,000
4.75% due 2040, mandatory tender at June 1, 2017	37,000			37,000
5.20% due 2040, mandatory tender at June 1, 2020	40,045			40,045
5.90% due 2040	255,000			255,000
6.25% due 2040	11,500			11,500
4.00% due 2043, mandatory tender at June 1, 2015	39,300			39,300
5.20% due 2043, mandatory tender at June 1, 2020	21,000			21,000
Senior Unsecured Notes:
7.95% due 2018	350,000			350,000
7.50% due 2018	100,025			100,025
5.35% due 2021	160,000			—
Other, including unamortized discounts	(330		)	(122		)
	1,215,540			1,055,748
Less current maturities	—			—
	1,215,540			1,055,748
TNMP Debt
First Mortgage Bonds:
2011 Term Loan Agreement, due 2014	50,000			—
2009 Term Loan Agreement, due 2014	—			50,000
9.50% due 2019, Series 2009A	265,500			265,500
Other, including unamortized discounts	(4,537		)	(5,163		)
	310,963			310,337
Less current maturities	—			—
	310,963			310,337
PNMR Debt
Senior unsecured notes, 9.25% due 2015	142,592			192,592
Other	4,918			7,170
	147,510			199,762
Less current maturities	2,387			2,252
	145,123			197,510
Total Consolidated PNMR Debt	1,674,013			1,565,847
Less current maturities	2,387			2,252
	$	1,671,626		$	1,563,595

Schedule of Maturities of Long-term Debt [Table Text Block]

Long-term debt matures as follows:

	PNMR		PNM		TNMP		PNMR Consolidated
	(In thousands)
2012	$	2,387	$	—	$	—	$	2,387
2013	2,531		—		—		2,531
2014	—		—		50,000		50,000
2015	142,592		39,300		—		181,892
2016	—		—		—		—
Thereafter	—		1,176,570		265,500		1,442,070
Total	$	147,510	$	1,215,870	$	315,500	$	1,678,880