For an unclassified balance sheet, this item represents investments in debt and equity securities which are 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

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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, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Fair value	$ 178,834		$ 178,834		$ 168,851
Available-for-sale securities, Unrealized gains	30,676		30,676		25,881
Proceeds from sales	19,027	46,770	45,787	94,890
Gross realized gains	2,434	8,700	4,766	13,490
Gross realized (losses)	(1,186)	(554)	(1,925)	(2,282)
Domestic value [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Fair value	27,188		27,188		25,143
Available-for-sale securities, Unrealized gains	3,934		3,934		3,549
Domestic growth [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Fair value	58,427		58,427		52,187
Available-for-sale securities, Unrealized gains	20,298		20,298		16,714
Multinational [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Fair value	11,398		11,398		12,754
Available-for-sale securities, Unrealized gains	446		446		662
Municipals [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Fair value	43,007		43,007		41,463
Available-for-sale securities, Unrealized gains	3,548		3,548		2,861
U.S. Government [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Fair value	24,986		24,986		25,367
Available-for-sale securities, Unrealized gains	1,465		1,465		1,353
Corporate and other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Fair value	10,959		10,959		9,171
Available-for-sale securities, Unrealized gains	985		985		742
Cash and equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Fair value	2,869		2,869		2,766
Available-for-sale securities, Unrealized gains	$ 0		$ 0		$ 0