Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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+ Details

- Definition

This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ References+ Details

- Definition

The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Glossary Investing Activities

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+ Details

Fair Value of Derivative and Other Financial Instruments, Avaialbe for Sale Securities (Details) (PNMR and PNM [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Unrealized gains	$ 28,893		$ 28,893		$ 27,156
Available-for-sale securities, Fair value	200,769		200,769		192,511
Proceeds from sales	61,821	19,027	76,106	45,787
Gross realized gains	4,960	2,434	6,351	4,766
Gross realized (losses)	(1,311)	(1,186)	(1,717)	(1,925)
Cash and equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Unrealized gains	0		0		0
Available-for-sale securities, Fair value	26,652		26,652		4,628
Domestic value [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Unrealized gains	9,205		9,205		5,223
Available-for-sale securities, Fair value	33,675		33,675		30,044
Domestic growth [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Unrealized gains	16,846		16,846		15,212
Available-for-sale securities, Fair value	59,347		59,347		51,650
International and other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Unrealized gains	511		511		247
Available-for-sale securities, Fair value	15,127		15,127		14,868
U.S. Government [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Unrealized gains	313		313		1,305
Available-for-sale securities, Fair value	17,077		17,077		32,592
Municipals [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Unrealized gains	1,819		1,819		4,069
Available-for-sale securities, Fair value	40,284		40,284		43,861
Corporate and other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Unrealized gains	199		199		1,100
Available-for-sale securities, Fair value	$ 8,607		$ 8,607		$ 14,868