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Regulatory Assets and Liabilities (Tables)
 12 Months Ended
Dec. 31, 2018
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,
 
2018
 
2017
 
2018
 
2017
Assets:
(In thousands)
Current:
 
 
 
 
 
 
 
FPPAC
$
4,104

 
$
363

 
$
—

 
$
—

Energy efficiency costs
430

 
1,776

 
—

 
794

 
4,534

 
2,139

 
—

 
794

Non-Current:
 
 
 
 
 
 
 
CTC, including carrying charges
—

 
—

 
17,744

 
26,998

Coal mine reclamation costs
19,915

 
16,462

 
—

 
—

Deferred income taxes
63,369

 
59,220

 
9,309

 
9,621

Loss on reacquired debt
21,085

 
22,744

 
31,510

 
32,808

Pension and OPEB(1)
227,400

 
222,774

 
26,972

 
26,153

Shutdown of SJGS Units 2 and 3
119,785

 
125,539

 
—

 
—

Hurricane recovery costs(2)
—

 
—

 
1,551

 
6,640

AMS surcharge
—

 
—

 
31,435

 
27,903

AMS retirement and other costs
—

 
—

 
16,489

 
8,948

Other
9,349

 
12,500

 
3,017

 
2,362

 
460,903

 
459,239

 
138,027

 
141,433

Total regulatory assets
$
465,437

 
$
461,378

 
$
138,027

 
$
142,227

 
PNM
 
TNMP
 
December 31,
 
December 31,
 
2018
 
2017
 
2018
 
2017
Liabilities:
(In thousands)
Current:
 
 
 
 
 
 
 
Renewable energy rider
$
(4,475
)
 
$
(779
)
 
$
—

 
$
—

Other
(1,500
)
 
(5
)
 
(3,471
)
 
(1,525
)
 
(5,975
)
 
(784
)
 
(3,471
)
 
(1,525
)
Non-Current:
 
 
 
 
 
 
 
Cost of removal
(263,597
)
 
(256,493
)
 
(29,637
)
 
(26,541
)
Deferred income taxes
(407,978
)
 
(445,390
)
 
(143,745
)
 
(148,455
)
PVNGS ARO
(18,397
)
 
(24,889
)
 
—

 
—

Renewable energy tax benefits
(20,226
)
 
(21,383
)
 
—

 
—

Nuclear spent fuel reimbursements
—

 
(5,518
)
 
—

 
—

Accelerated depreciation SNCRs
(3,690
)
 
—

 
—

 
—

Pension and OPEB(3)
—

 
—

 
(3,940
)
 
(3,442
)
Other
(83
)
 
(768
)
 
(136
)
 
(699
)
 
(713,971
)
 
(754,441
)
 
(177,458
)
 
(179,137
)
Total regulatory liabilities
$
(719,946
)
 
$
(755,225
)
 
$
(180,929
)
 
$
(180,662
)