Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2016

Related Party Transactions [Abstract]

Schedule of Related Party Transactions

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

	Year Ended December 31,
	2016		2015		2014
			(In thousands)
Services billings:
PNMR to PNM	$	94,606	$	90,827	$	86,871
PNMR to TNMP	28,907		28,109		28,349
PNM to TNMP	427		554		524
TNMP to PNMR	66		41		31
Income tax sharing payments:
PNMR to TNMP	—		—		—
PNMR to PNM	—		1,450		—
TNMP to PNMR	—		—		—
Interest payments:
PNM to PNMR	11		54		65
PNMR to PNM	150		110		102
TNMP to PNMR	132		276		309