Related Party Transactions (Tables)

3 Months Ended

Mar. 31, 2013

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:

	Three Months Ended
	March 31,
	2013		2012
	(In thousands)
Services billings:
PNMR to PNM	$	22,652	$	22,055
PNMR to TNMP	7,361		6,951
PNM to TNMP	108		121
TNMP to PNMR	2		4
Interest billings:
PNMR to TNMP	96		18
PNMR to PNM	1		—
PNM to PNMR	41		45
Income tax sharing payments:
PNMR to PNM	—		63,114
PNMR to TNMP	—		1,952