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Accumulated Other Comprehensive Income (Loss)
 12 Months Ended
Dec. 31, 2023
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)
PNMPNMR
Unrealized Gains on Available-for-Sale SecuritiesPension
Liability
Adjustment		TotalFair Value Adjustment for Cash Flow HedgesTotal
 (In thousands)
Balance at December 31, 2020$20,403 $(98,914)$(78,511)$(672)$(79,183)
 Amounts reclassified from AOCI (pre-tax)(9,765)8,348 (1,417)(903)(2,320)
Income tax impact of amounts reclassified2,480 (2,120)360 229 589 
 Other OCI changes (pre-tax)(1,881)12,111 10,230 1,804 12,034 
Income tax impact of other OCI changes478 (3,076)(2,598)(458)(3,056)
Net after-tax change(8,688)15,263 6,575 672 7,247 
Balance at December 31, 202111,715 (83,651)(71,936)— (71,936)
 Amounts reclassified from AOCI (pre-tax)(3,827)7,104 3,277 (1,176)2,101 
Income tax impact of amounts reclassified972 (1,804)(832)299 (533)
 Other OCI changes (pre-tax)(1,928)(4,565)(6,493)12,285 5,792 
Income tax impact of other OCI changes490 1,159 1,649 (3,121)(1,472)
Net after-tax change(4,293)1,894 (2,399)8,287 5,888 
Balance at December 31, 20227,422 (81,757)(74,335)8,287 (66,048)
 Amounts reclassified from AOCI (pre-tax)(7,199)4,776 (2,423)9,287 6,864 
Income tax impact of amounts reclassified1,828 (1,212)616 (2,359)(1,743)
 Other OCI changes (pre-tax)11,529 1,389 12,918 (15,483)(2,565)
Income tax impact of other OCI changes(2,928)(353)(3,281)3,933 652 
Net after-tax change3,230 4,600 7,830 (4,622)3,208 
Balance at December 31, 2023$10,652 $(77,157)$(66,505)$3,665 $(62,840)
 
The Consolidated Statements of Earnings include pre-tax amounts reclassified from AOCI related to Unrealized Gains on Available-for-Sale Debt 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.