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Condensed Consolidated Statements of Earnings (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Electric Operating Revenues | $ 332,868 us-gaap_ElectricUtilityRevenue | $ 328,897 us-gaap_ElectricUtilityRevenue
Operating Expenses: |  |
Cost of energy | 115,645 us-gaap_CostOfGoodsSoldElectric | 112,614 us-gaap_CostOfGoodsSoldElectric
Administrative and general | 43,859 us-gaap_GeneralAndAdministrativeExpense | 43,859 us-gaap_GeneralAndAdministrativeExpense
Energy production costs | 42,669 us-gaap_ElectricProductionExpense | 47,288 us-gaap_ElectricProductionExpense
Regulatory disallowances | 215 pnm_RegulatoryDisallowance | 0 pnm_RegulatoryDisallowance
Depreciation and amortization | 45,461 us-gaap_CostOfServicesDepreciationAndAmortization | 41,965 us-gaap_CostOfServicesDepreciationAndAmortization
Transmission and distribution costs | 16,487 pnm_TransmissionAndDistributionCosts | 16,906 pnm_TransmissionAndDistributionCosts
Taxes other than income taxes | 18,963 us-gaap_UtilitiesOperatingExpenseTaxes | 17,512 us-gaap_UtilitiesOperatingExpenseTaxes
Total operating expenses | 283,299 us-gaap_UtilitiesOperatingExpense | 280,144 us-gaap_UtilitiesOperatingExpense
Operating income | 49,569 us-gaap_OperatingIncomeLoss | 48,753 us-gaap_OperatingIncomeLoss
Other Income and Deductions: |  |
Interest income | 1,750 us-gaap_InvestmentIncomeInterest | 2,117 us-gaap_InvestmentIncomeInterest
Gains on available-for-sale securities | 4,024 us-gaap_GainLossOnInvestments | 2,573 us-gaap_GainLossOnInvestments
Other income | 4,961 us-gaap_OtherIncome | 1,574 us-gaap_OtherIncome
Other (deductions) | (3,662)us-gaap_OtherExpenses | (2,931)us-gaap_OtherExpenses
Net other income and deductions | 7,073 us-gaap_OtherNonoperatingIncomeExpense | 3,333 us-gaap_OtherNonoperatingIncomeExpense
Interest Charges | 30,273 us-gaap_InterestExpense | 29,535 us-gaap_InterestExpense
Earnings before Income Taxes | 26,369 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 22,551 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income Taxes | 8,517 us-gaap_IncomeTaxExpenseBenefit | 6,420 us-gaap_IncomeTaxExpenseBenefit
Net Earnings | 17,852 us-gaap_ProfitLoss | 16,131 us-gaap_ProfitLoss
(Earnings) Attributable to Valencia Non-controlling Interest | (3,380)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (3,531)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Preferred Stock Dividend Requirements of Subsidiary | (132)us-gaap_DividendsPreferredStock | (132)us-gaap_DividendsPreferredStock
Net Earnings Attributable to PNMR | 14,340 us-gaap_NetIncomeLoss | 12,468 us-gaap_NetIncomeLoss
Net Earnings Available for PNM Common Stock | 14,340 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 12,468 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Net Earnings Attributable to PNMR per Common Share: |  |
Basic (dollars per share) | $ 0.18 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.16 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare
Diluted (dollars per share) | $ 0.18 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.16 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare
Dividends Declared per Common Share (dollars per share) | $ 0.200 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.185 us-gaap_CommonStockDividendsPerShareDeclared
Public Service Company of New Mexico [Member] |  |
Electric Operating Revenues | 261,940 us-gaap_ElectricUtilityRevenue / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 262,736 us-gaap_ElectricUtilityRevenue / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Operating Expenses: |  |
Cost of energy | 97,866 us-gaap_CostOfGoodsSoldElectric / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 96,626 us-gaap_CostOfGoodsSoldElectric / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Administrative and general | 39,567 us-gaap_GeneralAndAdministrativeExpense / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 38,609 us-gaap_GeneralAndAdministrativeExpense / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Energy production costs | 42,669 us-gaap_ElectricProductionExpense / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 47,288 us-gaap_ElectricProductionExpense / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Regulatory disallowances | 215 pnm_RegulatoryDisallowance / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 0 pnm_RegulatoryDisallowance / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Depreciation and amortization | 28,403 us-gaap_CostOfServicesDepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 27,082 us-gaap_CostOfServicesDepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Transmission and distribution costs | 10,769 pnm_TransmissionAndDistributionCosts / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 11,327 pnm_TransmissionAndDistributionCosts / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Taxes other than income taxes | 10,796 us-gaap_UtilitiesOperatingExpenseTaxes / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 10,500 us-gaap_UtilitiesOperatingExpenseTaxes / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Total operating expenses | 230,285 us-gaap_UtilitiesOperatingExpense / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 231,432 us-gaap_UtilitiesOperatingExpense / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Operating income | 31,655 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 31,304 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Other Income and Deductions: |  |
Interest income | 1,771 us-gaap_InvestmentIncomeInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 2,128 us-gaap_InvestmentIncomeInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Gains on available-for-sale securities | 4,024 us-gaap_GainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 2,573 us-gaap_GainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Other income | 3,392 us-gaap_OtherIncome / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 1,113 us-gaap_OtherIncome / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Other (deductions) | (1,606)us-gaap_OtherExpenses / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | (2,018)us-gaap_OtherExpenses / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Net other income and deductions | 7,581 us-gaap_OtherNonoperatingIncomeExpense / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 3,796 us-gaap_OtherNonoperatingIncomeExpense / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Interest Charges | 19,959 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 19,812 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Earnings before Income Taxes | 19,277 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 15,288 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Income Taxes | 5,775 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 4,083 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Net Earnings | 13,502 us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 11,205 us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
(Earnings) Attributable to Valencia Non-controlling Interest | (3,380)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | (3,531)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Preferred Stock Dividend Requirements of Subsidiary | (132)us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | (132)us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Net Earnings Attributable to PNMR | 10,122 us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 7,674 us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Net Earnings Available for PNM Common Stock | 9,990 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 7,542 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember
Texas-New Mexico Power Company [Member] |  |
Electric Operating Revenues | 70,928 us-gaap_ElectricUtilityRevenue / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 66,161 us-gaap_ElectricUtilityRevenue / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Operating Expenses: |  |
Cost of energy | 17,779 us-gaap_CostOfGoodsSoldElectric / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 15,988 us-gaap_CostOfGoodsSoldElectric / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Administrative and general | 9,833 us-gaap_GeneralAndAdministrativeExpense / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 9,840 us-gaap_GeneralAndAdministrativeExpense / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Depreciation and amortization | 13,458 us-gaap_CostOfServicesDepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 11,842 us-gaap_CostOfServicesDepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Transmission and distribution costs | 5,718 pnm_TransmissionAndDistributionCosts / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 5,579 pnm_TransmissionAndDistributionCosts / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Taxes other than income taxes | 6,209 us-gaap_UtilitiesOperatingExpenseTaxes / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 5,650 us-gaap_UtilitiesOperatingExpenseTaxes / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Total operating expenses | 52,997 us-gaap_UtilitiesOperatingExpense / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 48,899 us-gaap_UtilitiesOperatingExpense / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Operating income | 17,931 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 17,262 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Other Income and Deductions: |  |
Interest income | 0 us-gaap_InvestmentIncomeInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 0 us-gaap_InvestmentIncomeInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Other income | 1,540 us-gaap_OtherIncome / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 420 us-gaap_OtherIncome / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Other (deductions) | (249)us-gaap_OtherExpenses / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | (231)us-gaap_OtherExpenses / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Net other income and deductions | 1,291 us-gaap_OtherNonoperatingIncomeExpense / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 189 us-gaap_OtherNonoperatingIncomeExpense / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Interest Charges | 6,925 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 6,598 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Earnings before Income Taxes | 12,297 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 10,853 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Income Taxes | 4,603 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 4,050 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Net Earnings | 7,694 us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 6,803 us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
(Earnings) Attributable to Valencia Non-controlling Interest | 0 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 0 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Preferred Stock Dividend Requirements of Subsidiary | 0 us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 0 us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Net Earnings Attributable to PNMR | 7,694 us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 6,803 us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember
Net Earnings Available for PNM Common Stock | $ 7,694 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | $ 6,803 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember

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- Definition Total costs related to electricity produced and sold during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 2 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(b)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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