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Accumulated Other Comprehensive Income (Loss)
 12 Months Ended
Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss)
AOCI reports a measure for accumulated changes in equity that result from transactions and other economic events other than transactions with shareholders. Information regarding AOCI is as follows:
 
Accumulated Other Comprehensive Income (Loss)
 
PNM
 
PNMR
 
Unrealized Gains on Available-for-Sale Securities
 
Pension
Liability
Adjustment
 
Total
 
Fair Value Adjustment for Cash Flow Hedges
 
Total
 
(In thousands)
Balance at December 31, 2015
$
17,346

 
$
(88,822
)
 
$
(71,476
)
 
$
44

 
$
(71,432
)
 Amounts reclassified from AOCI (pre-tax)
(22,139
)
 
5,504

 
(16,635
)
 
764

 
(15,871
)
Income tax impact of amounts reclassified
8,639

 
(2,148
)
 
6,491

 
(298
)
 
6,193

 Other OCI changes (pre-tax)
778

 
(18,501
)
 
(17,723
)
 
(874
)
 
(18,597
)
Income tax impact of other OCI changes
(304
)
 
7,219

 
6,915

 
341

 
7,256

Net after-tax change
(13,026
)
 
(7,926
)
 
(20,952
)
 
(67
)
 
(21,019
)
Balance at December 31, 2016
4,320

 
(96,748
)
 
(92,428
)
 
(23
)
 
(92,451
)
 Amounts reclassified from AOCI (pre-tax)
(17,567
)
 
6,452

 
(11,115
)
 
581

 
(10,534
)
Income tax impact of amounts reclassified
6,816

 
(2,504
)
 
4,312

 
(225
)
 
4,087

 Other OCI changes (pre-tax)
28,160

 
3,618

 
31,778

 
1,000

 
32,778

Income tax impact of other OCI changes
(10,927
)
 
(919
)
 
(11,846
)
 
(388
)
 
(12,234
)
Net after-tax change
6,482

 
6,647

 
13,129

 
968

 
14,097

Reclassification of stranded income taxes to retained earnings (Note 18)
2,367

 
(20,161
)
 
(17,794
)
 
208

 
(17,586
)
Balance at December 31, 2017, as originally reported
13,169

 
(110,262
)
 
(97,093
)
 
1,153

 
(95,940
)
Cumulative effect adjustment (Note 9)
(11,208
)
 
—

 
(11,208
)
 
—

 
(11,208
)
Balance at January 1, 2018, as adjusted
1,961

 
(110,262
)
 
(108,301
)
 
1,153

 
(107,148
)
 Amounts reclassified from AOCI (pre-tax)
(3,819
)
 
7,568

 
3,749

 
216

 
3,965

Income tax impact of amounts reclassified
970

 
(1,922
)
 
(952
)
 
(56
)
 
(1,008
)
 Other OCI changes (pre-tax)
3,790

 
(10,382
)
 
(6,592
)
 
570

 
(6,022
)
Income tax impact of other OCI changes
(963
)
 
2,637

 
1,674

 
(145
)
 
1,529

Net after-tax change
(22
)
 
(2,099
)
 
(2,121
)
 
585

 
(1,536
)
Balance at December 31, 2018
$
1,939

 
$
(112,361
)
 
$
(110,422
)
 
$
1,738

 
$
(108,684
)

 
The Consolidated Statements of Earnings include pre-tax amounts reclassified from AOCI related to Unrealized Gains on Available-for-Sale Securities in gains (losses) on investment securities, related to Pension Liability Adjustment in other(deductions), and related to Fair Value Adjustment for Cash Flow Hedges in interest charges. The income tax impacts of all amounts reclassified from AOCI are included in income taxes in the Consolidated Statements of Earnings.