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Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2012

Related Party Transactions [Abstract]

Schedule of Related Party Transactions [Table Text Block]

The table below summarizes the nature and amount of related party transactions of PNMR, PNM and TNMP:    

	Year Ended December 31,
	2012				2011				2010
					(In thousands)
Electricity, transmission and distribution related services billings:
TNMP to PNMR	$	—			$	33,813			$	39,084
Services billings:
PNMR to PNM	99,986				98,914				93,602
PNMR to TNMP	29,110				29,353				25,455
PNM to TNMP	595				550				400
TNMP to PNMR	15				164				319
PNMR to Optim Energy	—				4,083				5,778
Optim Energy to PNMR	—				23				173
Income tax sharing payments:
PNMR to TNMP	1,951				—				13,869
PNMR to PNM	63,114				—				59,298
Interest payments:
PNM to PNMR	1				54				13
TNMP to PNMR	137				40				281

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- Definition

Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates.

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