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Regulatory Assets and Liabilities (Tables)
 12 Months Ended
Dec. 31, 2017
Regulated Operations [Abstract]  
Schedule of Regulatory Assets and Liabilities
Regulatory assets and liabilities reflected in the Consolidated Balance Sheets are presented below.
 
 
PNM
 
TNMP
 
December 31,
 
December 31,
 
2017
 
2016
 
2017
 
2016
Assets:
(In thousands)
Current:
 
 
 
 
 
 
 
FPPAC
$
363

 
$
1,451

 
$
—

 
$
—

Energy efficiency costs
1,776

 
1,991

 
794

 
413

 
2,139

 
3,442

 
794

 
413

Non-Current:
 
 
 
 
 
 
 
CTC, including carrying charges
—

 
—

 
26,998

 
36,328

Coal mine reclamation costs
16,462

 
22,383

 
—

 
—

Deferred income taxes
59,220

 
62,918

 
9,621

 
9,932

Loss on reacquired debt
22,744

 
24,404

 
32,808

 
34,107

Pension and OPEB
222,774

 
249,286

 
26,153

 
27,661

Shutdown of SJGS Units 2 and 3
125,539

 
—

 
—

 
—

Hurricane recovery costs
—

 
—

 
6,640

 
—

AMS surcharge
—

 
—

 
27,903

 
14,669

AMS retirement costs
—

 
—

 
8,948

 
11,086

Other
12,500

 
6,422

 
2,362

 
2,027

 
459,239

 
365,413

 
141,433

 
135,810

Total regulatory assets
$
461,378

 
$
368,855

 
$
142,227

 
$
136,223

 
 
 
 
 
 
 
 
 
PNM
 
TNMP
 
December 31,
 
December 31,
 
2017
 
2016
 
2017
 
2016
Liabilities:
(In thousands)
Current:
 
 
 
 
 
 
 
Renewable energy rider
$
(779
)
 
$
(3,411
)
 
$
—

 
$
—

Other
(5
)
 
(106
)
 
(1,525
)
 
(92
)
 
(784
)
 
(3,517
)
 
(1,525
)
 
(92
)
Non-Current:
 
 
 
 
 
 
 
Cost of removal
(256,493
)
 
(297,087
)
 
(26,541
)
 
(26,900
)
Deferred income taxes
(445,390
)
 
(62,920
)
 
(148,455
)
 
(2,644
)
PVNGS ARO
(24,889
)
 
(30,621
)
 
—

 
—

Renewable energy tax benefits
(21,383
)
 
(22,540
)
 
—

 
—

Nuclear spent fuel reimbursements
(5,518
)
 
(8,875
)
 
—

 
—

Pension and OPEB
—

 
—

 
(3,442
)
 
(1,955
)
Other
(768
)
 
(1,658
)
 
(699
)
 
(449
)
 
(754,441
)
 
(423,701
)
 
(179,137
)
 
(31,948
)
Total regulatory liabilities
$
(755,225
)
 
$
(427,218
)
 
$
(180,662
)
 
$
(32,040
)