Income Taxes Accumulated Accrued Interest Receivable (Payable) Related to Income Taxes (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 7,200,000
PNMR [Member]
Income Taxes [Line Items]
Accumulated accrued interest receivable	4,048,000	3,796,000
Accumulated accrued interest payable	(1,118,000)	(1,108,000)
Public Service Company of New Mexico [Member]
Income Taxes [Line Items]
Accumulated accrued interest receivable	4,048,000	3,796,000
Accumulated accrued interest payable	(24,000)	(23,000)
Texas-New Mexico Power Company [Member]
Income Taxes [Line Items]
Accumulated accrued interest receivable	0	0
Accumulated accrued interest payable	$ (118,000)	$ (116,000)