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Consolidated Balance Sheets (USD $) | Dec. 31, 2014 | Dec. 31, 2013
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Current Assets: |  |
Cash and cash equivalents | $ 28,274,000us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 2,533,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Accounts receivable, net of allowance for uncollectible accounts of $1,466 and $1,423 for PNMR and PNM | 87,038,000us-gaap_AccountsReceivableNetCurrent | 90,251,000us-gaap_AccountsReceivableNetCurrent
Unbilled revenues | 63,719,000us-gaap_UnbilledReceivablesCurrent | 58,806,000us-gaap_UnbilledReceivablesCurrent
Other receivables | 39,857,000us-gaap_OtherReceivables | 53,909,000us-gaap_OtherReceivables
Materials, supplies, and fuel stock | 63,628,000us-gaap_InventoryNet | 67,223,000us-gaap_InventoryNet
Regulatory assets | 47,855,000us-gaap_RegulatoryAssetsCurrent | 24,416,000us-gaap_RegulatoryAssetsCurrent
Commodity derivative instruments | 11,232,000us-gaap_DerivativeAssetsCurrent | 4,064,000us-gaap_DerivativeAssetsCurrent
Income taxes receivable | 6,360,000us-gaap_IncomeTaxesReceivable | 7,066,000us-gaap_IncomeTaxesReceivable
Current portion of accumulated deferred income taxes | 26,383,000us-gaap_DeferredTaxAssetsNetCurrent | 58,681,000us-gaap_DeferredTaxAssetsNetCurrent
Other current assets | 58,471,000us-gaap_OtherAssetsCurrent | 34,590,000us-gaap_OtherAssetsCurrent
Total current assets | 432,817,000us-gaap_AssetsCurrent | 401,539,000us-gaap_AssetsCurrent
Other Property and Investments: |  |
Investment in PVNGS lessor notes | 9,538,000pnm_InvestmentInPvngsLessorNotes | 32,200,000pnm_InvestmentInPvngsLessorNotes
Available-for-sale securities | 250,145,000us-gaap_AvailableForSaleSecuritiesNoncurrent | 226,855,000us-gaap_AvailableForSaleSecuritiesNoncurrent
Other investments | 1,762,000us-gaap_OtherLongTermInvestments | 1,835,000us-gaap_OtherLongTermInvestments
Non-utility property | 3,406,000us-gaap_PropertyPlantAndEquipmentOtherNet | 4,353,000us-gaap_PropertyPlantAndEquipmentOtherNet
Total other property and investments | 264,851,000pnm_TotalOtherPropertyAndInvestments | 265,243,000pnm_TotalOtherPropertyAndInvestments
Utility Plant: |  |
Plant in service and plant held for future use | 5,941,581,000us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService | 5,563,061,000us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService
Less accumulated depreciation and amortization | 1,939,760,000us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation | 1,838,832,000us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
Net plant in service and plant held for future use | 4,001,821,000pnm_PublicUtilitiesPropertyPlantAndEquipmentInServiceNet | 3,724,229,000pnm_PublicUtilitiesPropertyPlantAndEquipmentInServiceNet
Construction work in progress | 190,389,000us-gaap_ConstructionInProgressGross | 132,080,000us-gaap_ConstructionInProgressGross
Nuclear fuel, net of accumulated amortization of $44,507 and $47,347 for PNMR and PNM | 77,796,000us-gaap_NuclearFuelNetOfAmortization | 77,602,000us-gaap_NuclearFuelNetOfAmortization
Net utility plant | 4,270,006,000us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet | 3,933,911,000us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet
Deferred Charges and Other Assets: |  |
Regulatory assets | 491,007,000us-gaap_RegulatoryAssetsNoncurrent | 523,955,000us-gaap_RegulatoryAssetsNoncurrent
Goodwill | 278,297,000us-gaap_Goodwill | 278,297,000us-gaap_Goodwill
Commodity derivative instruments | 0us-gaap_DerivativeAssetsNoncurrent | 3,002,000us-gaap_DerivativeAssetsNoncurrent
Other deferred charges | 92,347,000pnm_OtherDeferredCostsNetIncludingDeferredFinanceCosts | 94,263,000pnm_OtherDeferredCostsNetIncludingDeferredFinanceCosts
Total deferred charges and other assets | 861,651,000pnm_TotalDeferredChargesAndOtherAssets | 899,517,000pnm_TotalDeferredChargesAndOtherAssets
Total Assets | 5,829,325,000us-gaap_Assets | 5,500,210,000us-gaap_Assets
Current Liabilities: |  |
Short-term debt | 105,600,000us-gaap_ShortTermBorrowings | 149,200,000us-gaap_ShortTermBorrowings
Current installments of long-term debt | 333,066,000us-gaap_LongTermDebtCurrent | 75,000,000us-gaap_LongTermDebtCurrent
Accounts payable | 110,029,000us-gaap_AccountsPayableCurrent | 109,666,000us-gaap_AccountsPayableCurrent
Customer deposits | 12,555,000us-gaap_CustomerDepositsCurrent | 13,456,000us-gaap_CustomerDepositsCurrent
Accrued interest and taxes | 53,863,000pnm_AccruedInterestAndTaxesPayable | 49,600,000pnm_AccruedInterestAndTaxesPayable
Regulatory liabilities | 1,703,000us-gaap_RegulatoryLiabilityCurrent | 1,081,000us-gaap_RegulatoryLiabilityCurrent
Commodity derivative instruments | 1,209,000us-gaap_DerivativeLiabilitiesCurrent | 2,699,000us-gaap_DerivativeLiabilitiesCurrent
Dividends declared | 16,063,000us-gaap_DividendsPayableCurrent | 14,864,000us-gaap_DividendsPayableCurrent
Other current liabilities | 70,194,000us-gaap_OtherLiabilitiesCurrent | 77,105,000us-gaap_OtherLiabilitiesCurrent
Total current liabilities | 704,282,000us-gaap_LiabilitiesCurrent | 492,671,000us-gaap_LiabilitiesCurrent
Long-term Debt | 1,642,024,000us-gaap_LongTermDebtNoncurrent | 1,670,420,000us-gaap_LongTermDebtNoncurrent
Deferred Credits and Other Liabilities: |  |
Accumulated deferred income taxes | 891,111,000us-gaap_DeferredTaxLiabilitiesNoncurrent | 827,263,000us-gaap_DeferredTaxLiabilitiesNoncurrent
Regulatory liabilities | 466,143,000us-gaap_RegulatoryLiabilityNoncurrent | 460,649,000us-gaap_RegulatoryLiabilityNoncurrent
Asset retirement obligations | 104,170,000us-gaap_AssetRetirementObligationsNoncurrent | 96,135,000us-gaap_AssetRetirementObligationsNoncurrent
Accrued pension liability and postretirement benefit cost | 110,738,000us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent | 80,046,000us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
Commodity derivative instruments | 477,000us-gaap_DerivativeLiabilitiesNoncurrent | 1,094,000us-gaap_DerivativeLiabilitiesNoncurrent
Other deferred credits | 103,759,000us-gaap_OtherDeferredCreditsNoncurrent | 109,805,000us-gaap_OtherDeferredCreditsNoncurrent
Total deferred credits and other liabilities | 1,676,398,000us-gaap_LiabilitiesOtherThanLongtermDebtNoncurrent | 1,574,992,000us-gaap_LiabilitiesOtherThanLongtermDebtNoncurrent
Total liabilities | 4,022,704,000us-gaap_Liabilities | 3,738,083,000us-gaap_Liabilities
Commitments and Contingencies (See Note 16) |  |
Cumulative Preferred Stock of Subsidiary without mandatory redemption requirements ($100 stated value; 10,000,000 shares authorized; issued and outstanding 115,293 shares) | 11,529,000pnm_CumulativePreferredStockOfSubsidiaryWithoutMandatoryRedemptionRequirements | 11,529,000pnm_CumulativePreferredStockOfSubsidiaryWithoutMandatoryRedemptionRequirements
Company common stockholders’ equity: |  |
Common stock outstanding | 1,173,845,000us-gaap_CommonStockValue | 1,178,369,000us-gaap_CommonStockValue
Accumulated other comprehensive income (loss), net of income taxes | (61,755,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax | (58,140,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Retained earnings | 609,456,000us-gaap_RetainedEarningsAccumulatedDeficit | 553,340,000us-gaap_RetainedEarningsAccumulatedDeficit
Total PNMR common stockholders’ equity | 1,721,546,000us-gaap_StockholdersEquity | 1,673,569,000us-gaap_StockholdersEquity
Non-controlling interest in Valencia | 73,546,000us-gaap_MinorityInterest | 77,029,000us-gaap_MinorityInterest
Total equity | 1,795,092,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 1,750,598,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Total liabilities and stockholders' equity | 5,829,325,000us-gaap_LiabilitiesAndStockholdersEquity | 5,500,210,000us-gaap_LiabilitiesAndStockholdersEquity
Texas-New Mexico Power Company [Member] |  |
Current Assets: |  |
Cash and cash equivalents | 1,000us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 1,000us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Accounts receivable, net of allowance for uncollectible accounts of $1,466 and $1,423 for PNMR and PNM | 19,416,000us-gaap_AccountsReceivableNetCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 20,125,000us-gaap_AccountsReceivableNetCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Unbilled revenues | 9,579,000us-gaap_UnbilledReceivablesCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 9,814,000us-gaap_UnbilledReceivablesCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Other receivables | 2,063,000us-gaap_OtherReceivables / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 1,246,000us-gaap_OtherReceivables / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Materials, supplies, and fuel stock | 2,769,000us-gaap_InventoryNet / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 2,703,000us-gaap_InventoryNet / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Regulatory assets | 3,875,000us-gaap_RegulatoryAssetsCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 5,022,000us-gaap_RegulatoryAssetsCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Current portion of accumulated deferred income taxes | 6,398,000us-gaap_DeferredTaxAssetsNetCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 6,501,000us-gaap_DeferredTaxAssetsNetCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Other current assets | 938,000us-gaap_OtherAssetsCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 980,000us-gaap_OtherAssetsCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Total current assets | 45,039,000us-gaap_AssetsCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 46,392,000us-gaap_AssetsCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Other Property and Investments: |  |
Other investments | 242,000us-gaap_OtherLongTermInvestments / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 245,000us-gaap_OtherLongTermInvestments / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Non-utility property | 2,240,000us-gaap_PropertyPlantAndEquipmentOtherNet / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 2,240,000us-gaap_PropertyPlantAndEquipmentOtherNet / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Total other property and investments | 2,482,000pnm_TotalOtherPropertyAndInvestments / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 2,485,000pnm_TotalOtherPropertyAndInvestments / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Utility Plant: |  |
Plant in service and plant held for future use | 1,182,112,000us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 1,074,193,000us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Less accumulated depreciation and amortization | 375,407,000us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 352,105,000us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Net plant in service and plant held for future use | 806,705,000pnm_PublicUtilitiesPropertyPlantAndEquipmentInServiceNet / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 722,088,000pnm_PublicUtilitiesPropertyPlantAndEquipmentInServiceNet / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Construction work in progress | 16,538,000us-gaap_ConstructionInProgressGross / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 16,790,000us-gaap_ConstructionInProgressGross / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Net utility plant | 823,243,000us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 738,878,000us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Deferred Charges and Other Assets: |  |
Regulatory assets | 133,962,000us-gaap_RegulatoryAssetsNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 139,738,000us-gaap_RegulatoryAssetsNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Goodwill | 226,665,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 226,665,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Other deferred charges | 8,850,000pnm_OtherDeferredCostsNetIncludingDeferredFinanceCosts / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 8,273,000pnm_OtherDeferredCostsNetIncludingDeferredFinanceCosts / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Total deferred charges and other assets | 369,477,000pnm_TotalDeferredChargesAndOtherAssets / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 374,676,000pnm_TotalDeferredChargesAndOtherAssets / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Total Assets | 1,240,241,000us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 1,162,431,000us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Current Liabilities: |  |
Short-term debt | 5,000,000us-gaap_ShortTermBorrowings / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 0us-gaap_ShortTermBorrowings / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Short-term debt - affiliate | 22,700,000us-gaap_NotesPayableRelatedPartiesClassifiedCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 29,400,000us-gaap_NotesPayableRelatedPartiesClassifiedCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Accounts payable | 14,203,000us-gaap_AccountsPayableCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 12,543,000us-gaap_AccountsPayableCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Affiliate payables | 2,469,000us-gaap_AccountsPayableRelatedPartiesCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 3,181,000us-gaap_AccountsPayableRelatedPartiesCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Accrued interest and taxes | 28,574,000pnm_AccruedInterestAndTaxesPayable / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 23,778,000pnm_AccruedInterestAndTaxesPayable / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Other current liabilities | 2,271,000us-gaap_OtherLiabilitiesCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 8,999,000us-gaap_OtherLiabilitiesCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Total current liabilities | 75,217,000us-gaap_LiabilitiesCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 77,901,000us-gaap_LiabilitiesCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Long-term Debt | 365,667,000us-gaap_LongTermDebtNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 336,036,000us-gaap_LongTermDebtNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Deferred Credits and Other Liabilities: |  |
Accumulated deferred income taxes | 217,945,000us-gaap_DeferredTaxLiabilitiesNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 190,197,000us-gaap_DeferredTaxLiabilitiesNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Regulatory liabilities | 40,662,000us-gaap_RegulatoryLiabilityNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 46,038,000us-gaap_RegulatoryLiabilityNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Asset retirement obligations | 848,000us-gaap_AssetRetirementObligationsNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 782,000us-gaap_AssetRetirementObligationsNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Accrued pension liability and postretirement benefit cost | 7,888,000us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 3,435,000us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Other deferred credits | 7,349,000us-gaap_OtherDeferredCreditsNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 5,111,000us-gaap_OtherDeferredCreditsNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Total deferred credits and other liabilities | 274,692,000us-gaap_LiabilitiesOtherThanLongtermDebtNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 245,563,000us-gaap_LiabilitiesOtherThanLongtermDebtNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Total liabilities | 715,576,000us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 659,500,000us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Commitments and Contingencies (See Note 16) |  |
Company common stockholders’ equity: |  |
Common stock outstanding | 64,000us-gaap_CommonStockValue / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 64,000us-gaap_CommonStockValue / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Paid-in-capital | 404,166,000us-gaap_AdditionalPaidInCapital / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 404,166,000us-gaap_AdditionalPaidInCapital / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Accumulated other comprehensive income (loss), net of income taxes | 0us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | (263,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Retained earnings | 120,435,000us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 98,964,000us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Total PNMR common stockholders’ equity | 524,665,000us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 502,931,000us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Total liabilities and stockholders' equity | 1,240,241,000us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 1,162,431,000us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Public Service Company of New Mexico [Member] |  |
Current Assets: |  |
Cash and cash equivalents | 25,480,000us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 21,000us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Accounts receivable, net of allowance for uncollectible accounts of $1,466 and $1,423 for PNMR and PNM | 67,622,000us-gaap_AccountsReceivableNetCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 70,126,000us-gaap_AccountsReceivableNetCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Unbilled revenues | 54,140,000us-gaap_UnbilledReceivablesCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 48,992,000us-gaap_UnbilledReceivablesCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Other receivables | 37,622,000us-gaap_OtherReceivables / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 52,964,000us-gaap_OtherReceivables / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Affiliate receivables | 8,853,000us-gaap_DueFromRelatedPartiesCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 10,054,000us-gaap_DueFromRelatedPartiesCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Materials, supplies, and fuel stock | 60,859,000us-gaap_InventoryNet / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 64,520,000us-gaap_InventoryNet / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Regulatory assets | 43,980,000us-gaap_RegulatoryAssetsCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 19,394,000us-gaap_RegulatoryAssetsCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Commodity derivative instruments | 11,232,000us-gaap_DerivativeAssetsCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 4,064,000us-gaap_DerivativeAssetsCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Income taxes receivable | 6,105,000us-gaap_IncomeTaxesReceivable / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 4,030,000us-gaap_IncomeTaxesReceivable / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Current portion of accumulated deferred income taxes | 12,418,000us-gaap_DeferredTaxAssetsNetCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 43,827,000us-gaap_DeferredTaxAssetsNetCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Other current assets | 53,095,000us-gaap_OtherAssetsCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 30,510,000us-gaap_OtherAssetsCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Total current assets | 381,406,000us-gaap_AssetsCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 348,502,000us-gaap_AssetsCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Other Property and Investments: |  |
Investment in PVNGS lessor notes | 9,538,000pnm_InvestmentInPvngsLessorNotes / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 32,200,000pnm_InvestmentInPvngsLessorNotes / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Available-for-sale securities | 250,145,000us-gaap_AvailableForSaleSecuritiesNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 226,855,000us-gaap_AvailableForSaleSecuritiesNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Other investments | 397,000us-gaap_OtherLongTermInvestments / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 445,000us-gaap_OtherLongTermInvestments / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Non-utility property | 96,000us-gaap_PropertyPlantAndEquipmentOtherNet / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 976,000us-gaap_PropertyPlantAndEquipmentOtherNet / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Total other property and investments | 260,176,000pnm_TotalOtherPropertyAndInvestments / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 260,476,000pnm_TotalOtherPropertyAndInvestments / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Utility Plant: |  |
Plant in service and plant held for future use | 4,581,066,000us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 4,314,016,000us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Less accumulated depreciation and amortization | 1,486,406,000us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 1,402,531,000us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Net plant in service and plant held for future use | 3,094,660,000pnm_PublicUtilitiesPropertyPlantAndEquipmentInServiceNet / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 2,911,485,000pnm_PublicUtilitiesPropertyPlantAndEquipmentInServiceNet / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Construction work in progress | 169,673,000us-gaap_ConstructionInProgressGross / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 107,344,000us-gaap_ConstructionInProgressGross / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Nuclear fuel, net of accumulated amortization of $44,507 and $47,347 for PNMR and PNM | 77,796,000us-gaap_NuclearFuelNetOfAmortization / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 77,602,000us-gaap_NuclearFuelNetOfAmortization / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Net utility plant | 3,342,129,000us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 3,096,431,000us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Deferred Charges and Other Assets: |  |
Regulatory assets | 357,045,000us-gaap_RegulatoryAssetsNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 384,217,000us-gaap_RegulatoryAssetsNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Goodwill | 51,632,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 51,632,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Commodity derivative instruments | 0us-gaap_DerivativeAssetsNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 3,002,000us-gaap_DerivativeAssetsNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Other deferred charges | 81,264,000pnm_OtherDeferredCostsNetIncludingDeferredFinanceCosts / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 83,356,000pnm_OtherDeferredCostsNetIncludingDeferredFinanceCosts / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Total deferred charges and other assets | 489,941,000pnm_TotalDeferredChargesAndOtherAssets / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 522,207,000pnm_TotalDeferredChargesAndOtherAssets / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Total Assets | 4,473,652,000us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 4,227,616,000us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Current Liabilities: |  |
Short-term debt | 0us-gaap_ShortTermBorrowings / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 49,200,000us-gaap_ShortTermBorrowings / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Short-term debt - affiliate | 0us-gaap_NotesPayableRelatedPartiesClassifiedCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 32,500,000us-gaap_NotesPayableRelatedPartiesClassifiedCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Current installments of long-term debt | 214,300,000us-gaap_LongTermDebtCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 75,000,000us-gaap_LongTermDebtCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Accounts payable | 86,055,000us-gaap_AccountsPayableCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 84,643,000us-gaap_AccountsPayableCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Customer deposits | 12,555,000us-gaap_CustomerDepositsCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 13,456,000us-gaap_CustomerDepositsCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Affiliate payables | 18,232,000us-gaap_AccountsPayableRelatedPartiesCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 20,498,000us-gaap_AccountsPayableRelatedPartiesCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Accrued interest and taxes | 29,298,000pnm_AccruedInterestAndTaxesPayable / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 27,665,000pnm_AccruedInterestAndTaxesPayable / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Regulatory liabilities | 1,703,000us-gaap_RegulatoryLiabilityCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 1,081,000us-gaap_RegulatoryLiabilityCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Commodity derivative instruments | 1,209,000us-gaap_DerivativeLiabilitiesCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 2,699,000us-gaap_DerivativeLiabilitiesCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Dividends declared | 132,000us-gaap_DividendsPayableCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 132,000us-gaap_DividendsPayableCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Other current liabilities | 52,053,000us-gaap_OtherLiabilitiesCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 50,392,000us-gaap_OtherLiabilitiesCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Total current liabilities | 415,537,000us-gaap_LiabilitiesCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 357,266,000us-gaap_LiabilitiesCurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Long-term Debt | 1,276,357,000us-gaap_LongTermDebtNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 1,215,618,000us-gaap_LongTermDebtNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Deferred Credits and Other Liabilities: |  |
Accumulated deferred income taxes | 715,814,000us-gaap_DeferredTaxLiabilitiesNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 677,094,000us-gaap_DeferredTaxLiabilitiesNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Regulatory liabilities | 425,481,000us-gaap_RegulatoryLiabilityNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 414,611,000us-gaap_RegulatoryLiabilityNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Asset retirement obligations | 103,182,000us-gaap_AssetRetirementObligationsNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 95,225,000us-gaap_AssetRetirementObligationsNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Accrued pension liability and postretirement benefit cost | 102,850,000us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 76,611,000us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Commodity derivative instruments | 477,000us-gaap_DerivativeLiabilitiesNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 1,094,000us-gaap_DerivativeLiabilitiesNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Other deferred credits | 86,023,000us-gaap_OtherDeferredCreditsNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 91,340,000us-gaap_OtherDeferredCreditsNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Total deferred credits and other liabilities | 1,433,827,000us-gaap_LiabilitiesOtherThanLongtermDebtNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 1,355,975,000us-gaap_LiabilitiesOtherThanLongtermDebtNoncurrent / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Total liabilities | 3,125,721,000us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 2,928,859,000us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Commitments and Contingencies (See Note 16) |  |
Cumulative Preferred Stock of Subsidiary without mandatory redemption requirements ($100 stated value; 10,000,000 shares authorized; issued and outstanding 115,293 shares) | 11,529,000pnm_CumulativePreferredStockOfSubsidiaryWithoutMandatoryRedemptionRequirements / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 11,529,000pnm_CumulativePreferredStockOfSubsidiaryWithoutMandatoryRedemptionRequirements / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Company common stockholders’ equity: |  |
Common stock outstanding | 1,061,776,000us-gaap_CommonStockValue / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 1,061,776,000us-gaap_CommonStockValue / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Accumulated other comprehensive income (loss), net of income taxes | (61,755,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | (57,877,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Retained earnings | 262,835,000us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 206,300,000us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Total PNMR common stockholders’ equity | 1,262,856,000us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 1,210,199,000us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Non-controlling interest in Valencia | 73,546,000us-gaap_MinorityInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 77,029,000us-gaap_MinorityInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Total equity | 1,336,402,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 1,287,228,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Total liabilities and stockholders' equity | $ 4,473,652,000us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | $ 4,227,616,000us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember

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