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Pension and Other Postretirement Benefits - Schedule of Pre-Tax Information About Net Actuarial (Gain) Loss in AOCI (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 USD ($)
PNM | Pension Plan |
Net actuarial (gain) loss |
Amounts in AOCI not yet recognized in net periodic benefit cost at beginning of year | $ 104,067
Experience (gain) loss | 12,081
Regulatory asset (liability) adjustment | (8,853)
Amortization recognized in net periodic benefit (income) | (4,782)
Amounts in AOCI not yet recognized in net periodic benefit cost at end of year | 102,513
PNM | Executive Retirement Program |
Net actuarial (gain) loss |
Amounts in AOCI not yet recognized in net periodic benefit cost at beginning of year | 1,104
Experience (gain) loss | (45)
Regulatory asset (liability) adjustment | 26
Amortization recognized in net periodic benefit (income) | (84)
Amounts in AOCI not yet recognized in net periodic benefit cost at end of year | 1,001
TNMP | Pension Plan |
Net actuarial (gain) loss |
Amounts in AOCI not yet recognized in net periodic benefit cost at beginning of year | 0
Experience (gain) loss | 456
Regulatory asset (liability) adjustment | (456)
Amortization recognized in net periodic benefit (income) | 0
Amounts in AOCI not yet recognized in net periodic benefit cost at end of year | 0
TNMP | Executive Retirement Program |
Net actuarial (gain) loss |
Amounts in AOCI not yet recognized in net periodic benefit cost at beginning of year | 0
Experience (gain) loss | (314)
Regulatory asset (liability) adjustment | 314
Amortization recognized in net periodic benefit (income) | 0
Amounts in AOCI not yet recognized in net periodic benefit cost at end of year | $ 0

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- Definition Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount, before tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-11 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A + Details
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