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Fair Value of Derivative and Other Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2021
Fair Value Disclosures [Abstract]  
Schedule of Commodity Derivatives
PNM’s commodity derivative instruments that are recorded at fair value, all of which are accounted for as economic hedges and considered Level 2 fair value measurements, are presented in the following line items on the Consolidated Balance Sheets: 
 Economic Hedges
 December 31,
 20212020
 (In thousands)
Other current assets$684 $1,096 
Other deferred charges455 
684 1,551 
Other current liabilities(2,275)(1,096)
Other deferred credits(455)
(2,275)(1,551)
Net$(1,591)$— 
Schedule of Realized Gain (Loss) Gains and losses recognized on the Consolidated Statements of Earnings related to investment securities in the NDT and reclamation trusts are presented in the following table:
Year ended December 31,
202120202019
(In thousands)
Equity securities:
Net gains from equity securities sold$8,738 $5,861 $5,698 
Net gains (losses) from equity securities still held
(442)17,707 18,319 
Total net gains on equity securities8,296 23,568 24,017 
Available-for-sale debt securities:
Net gains (losses) on debt securities8,554 (1,969)5,572 
Net gains on investment securities$16,850 $21,599 $29,589 
Gross realized losses shown below exclude the (increase)/decrease in realized impairment losses of $0.7 million, $(3.2) million, and $3.0 million for the years ended December 31, 2021, 2020 and 2019.
 Year Ended December 31,
 202120202019
 (In thousands)
Proceeds from sales$459,867 $590,998 $494,528 
Gross realized gains$39,408 $35,904 $25,760 
Gross realized (losses)$(22,815)$(28,817)$(17,453)
Investments Classified by Contractual Maturity Date
At December 31, 2021, the available-for-sale debt securities held by PNM, had the following final maturities:
 Fair Value
 (In thousands)
Within 1 year$29,680 
After 1 year through 5 years77,278 
After 5 years through 10 years93,302 
After 10 years through 15 years20,893 
After 15 years through 20 years12,933 
After 20 years39,120 
$273,206 
Schedule of Instruments Presented by Level of Hierarchy
Items recorded at fair value by PNM on the Consolidated Balance Sheets are presented below by level of the fair value hierarchy along with gross unrealized gains on investments in available-for-sale securities.
GAAP Fair Value Hierarchy
TotalQuoted Prices in Active Markets for Identical Assets (Level 1)Significant Other Observable Inputs
(Level 2)
Unrealized Gains
(In thousands)
December 31, 2021
Cash and cash equivalents$7,895 $7,895 $— 
Equity securities:
Corporate stocks, common97,626 97,626 — 
Corporate stocks, preferred9,114 3,775 5,339 
Mutual funds and other75,285 75,241 44 
Available-for-sale debt securities:
U.S. government43,128 13,204 29,924 $214 
International government16,001 — 16,001 1,508 
Municipals47,050 — 47,050 1,807 
Corporate and other167,027 — 167,027 12,212 
$463,126 $197,741 $265,385 $15,741 
December 31, 2020
Cash and cash equivalents$6,107 $6,107 $— 
Equity securities:
Corporate stocks, common85,271 85,271 — 
Corporate stocks, preferred9,910 3,608 6,302 
Mutual funds and other58,817 58,762 55 
Available-for-sale debt securities:
U.S. government55,839 29,579 26,260 $950 
International government16,032 — 16,032 2,537 
Municipals50,139 — 50,139 2,779 
Corporate and other158,000 157,997 21,121 
$440,115 $183,330 $256,785 $27,387 
Summary of Carrying Amounts and Fair Value of Instruments
The carrying amounts and fair values of long-term debt, all of which are considered Level 2 fair value measurements and are not recorded at fair value on the Consolidated Balance Sheets are presented below:
 Carrying
Amount
Fair Value
December 31, 2021(In thousands)
PNMR$3,698,919 $3,915,010 
PNM$1,881,110 $1,975,987 
TNMP$918,050 $1,039,023 
December 31, 2020
PNMR$3,295,150 $3,571,382 
PNM$1,696,620 $1,818,169 
TNMP$853,673 $1,006,722 
Schedule of Investments Held by the Employee Benefit Plans
The fair values of investments held by the employee benefit plans are as follows:
GAAP Fair Value Hierarchy
TotalQuoted Prices in Active Markets for Identical Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
December 31, 2021(In thousands)
PNM Pension Plan
Participation in PNMR Master Trust Investments:
Investments categorized within fair value hierarchy
$527,873 $235,605 $292,268 
Uncategorized investments
49,432 
Total Master Trust Investments$577,305 
TNMP Pension Plan
Participation in PNMR Master Trust Investments:
Investments categorized within fair value hierarchy
$58,623 $21,390 $37,233 
Uncategorized investments
3,962 
Total Master Trust Investments$62,585 
PNM OPEB Plan
Cash and cash equivalents$1,578 $1,578 $— 
Equity securities:
Mutual funds94,549 58,383 36,166 
$96,127 $59,961 $36,166 
TNMP OPEB Plan
Cash and cash equivalents$381 $381 $— 
Equity securities:
Mutual funds12,249 11,575 674 
$12,630 $11,956 $674 
GAAP Fair Value Hierarchy
TotalQuoted Prices in Active
Markets for Identical Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
December 31, 2020(In thousands)
PNM Pension Plan
Participation in PNMR Master Trust Investments:
Investments categorized within fair value hierarchy$498,907 $241,445 $257,462 
Uncategorized investments88,984 
Total Master Trust Investments$587,891 
TNMP Pension Plan
Participation in PNMR Master Trust Investments:
Investments categorized within fair value hierarchy$56,966 $28,732 $28,234 
Uncategorized investments9,230 
Total Master Trust Investments$66,196 
PNM OPEB Plan
Cash and cash equivalents$1,310 $1,310 $— 
Equity securities:
Mutual funds92,400 52,284 40,116 
$93,710 $53,594 $40,116 
TNMP OPEB Plan
Cash and cash equivalents$18 $18 $— 
Equity securities:
Mutual funds12,843 10,806 2,037 
$12,861 $10,824 $2,037 

The fair values of investments in the PNMR Master Trust are as follows:
GAAP Fair Value Hierarchy
TotalQuoted Prices
in Active Markets for
Identical Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
December 31, 2021(In thousands)
PNMR Master Trust
Cash and cash equivalents$18,924 $18,924 $— 
Equity securities:
Corporate stocks, common92,484 92,484 — 
Corporate stocks, preferred806 — 806 
Mutual funds and other222,106 59,203 162,903 
Fixed income securities:
U.S. government95,429 86,384 9,045 
International government5,977 — 5,977 
Municipals6,143 — 6,143 
Corporate and other144,627 — 144,627 
Total investments categorized within fair value hierarchy
586,496 $256,995 $329,501 
Uncategorized investments:
Private equity funds10,479 
Hedge funds8,913 
Real estate funds34,002 
$639,890 
GAAP Fair Value Hierarchy
TotalQuoted Prices
in Active Markets for
Identical Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
December 31, 2020(In thousands)
PNMR Master Trust
Cash and cash equivalents$20,812 $20,812 $— 
Equity securities:
Corporate stocks, common114,983 114,983 — 
Corporate stocks, preferred1,187 135 1,052 
Mutual funds and other173,931 47,418 126,513 
Fixed income securities:
U.S. government97,460 86,829 10,631 
International government6,202 — 6,202 
Municipals6,277 — 6,277 
Corporate and other135,021 — 135,021 
Total investments categorized within fair value hierarchy
555,873 $270,177 $285,696 
Uncategorized investments:
Private equity funds12,552 
Hedge funds52,285 
Real estate funds33,377 
$654,087