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Regulatory Assets and Liabilities (Tables)
 12 Months Ended
Dec. 31, 2014
Public Service Company of New Mexico [Member]  
Regulatory Assets [Line Items]  
Regulatory Assets and Liabilities [Table Text Block]
Regulatory assets and liabilities reflected in the Consolidated Balance Sheets are presented below.  
PNM
 
 
December 31,
 
2014
 
2013
Assets:
(In thousands)
Current:
 
 
 
FPPAC
$
43,980

 
$
19,394

Non-Current:
 
 
 
Coal mine reclamation costs
34,224

 
40,144

Deferred income taxes
63,645

 
61,850

Loss on reacquired debt
25,439

 
27,490

Pension and OPEB
222,545

 
206,691

FPPAC
—

 
25,386

Renewable energy costs
5,263

 
13,311

Other
5,929

 
9,345

 
357,045

 
384,217

Total regulatory assets
$
401,025

 
$
403,611

Liabilities:
 
 
 
Current:
 
 
 
Other
$
(1,703
)
 
$
(1,081
)
Non-Current:
 
 
 
Cost of removal
(277,148
)
 
(266,075
)
Deferred income taxes
(75,941
)
 
(80,495
)
AROs
(35,834
)
 
(37,567
)
Renewable energy tax benefits
(24,854
)
 
(26,011
)
Other
(11,704
)
 
(4,463
)
 
(425,481
)
 
(414,611
)
Total regulatory liabilities
$
(427,184
)
 
$
(415,692
)
Texas-New Mexico Power Company [Member]  
Regulatory Assets [Line Items]  
Regulatory Assets and Liabilities [Table Text Block]
TNMP
 
December 31,
 
2014
 
2013
Assets:
(In thousands)
Current:
 
 
 
Transmission cost recovery factor
$
2,482

 
$
4,250

Other
1,393

 
772

 
3,875

 
5,022

Non-Current:
 
 
 
CTC, including carrying charges
55,292

 
63,606

Deferred income taxes
10,556

 
10,868

Pension
23,803

 
19,938

Loss on reacquired debt
36,703

 
38,616

AMS retirement costs
6,453

 
5,083

Other
1,155

 
1,627

 
133,962

 
139,738

Total regulatory assets
$
137,837

 
$
144,760

Liabilities:
 
 
 
Non-Current:
 
 
 
Cost of removal
$
(29,391
)
 
$
(30,863
)
Deferred income taxes
(3,923
)
 
(4,563
)
AMS surcharge
(5,227
)
 
(7,251
)
OPEB
(2,121
)
 
(3,361
)
Total regulatory liabilities
$
(40,662
)
 
$
(46,038
)