Lease Commitments Schedule of Rent Expense (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
PNMR [Member]
Operating lease expense [Line Items]
Operating Leases, Rent Expense, Net	$ 82,882	$ 84,794	$ 86,323
Public Service Company of New Mexico [Member]
Operating lease expense [Line Items]
Operating Leases, Rent Expense, Net	78,306	78,483	78,422
Texas-New Mexico Power Company [Member]
Operating lease expense [Line Items]
Operating Leases, Rent Expense, Net	$ 2,663	$ 2,871	$ 3,606