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Consolidated Statements of Changes in Equity (USD $) In Thousands, unless otherwise specified | Total | Common Stock [Member] | AOCI [Member] | Retained Earnings [Member] | Total PNMR Common Stockholders' Equity [Member] | Non-controlling Interest in Valencia [Member] | Public Service Company of New Mexico [Member] | Public Service Company of New Mexico [Member] Common Stock [Member] | Public Service Company of New Mexico [Member] AOCI [Member] | Public Service Company of New Mexico [Member] Retained Earnings [Member] | Public Service Company of New Mexico [Member] Total PNMR Common Stockholders' Equity [Member] | Public Service Company of New Mexico [Member] Non-controlling Interest in Valencia [Member] | Texas-New Mexico Power Company [Member] | Texas-New Mexico Power Company [Member] Common Stock [Member] | Texas-New Mexico Power Company [Member] Additional Paid-in Capital [Member] | Texas-New Mexico Power Company [Member] AOCI [Member] | Texas-New Mexico Power Company [Member] Retained Earnings [Member]
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Balance TNMP at Dec. 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |  | $ 463,253us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | $ 64us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 416,394us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (58)us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ 46,853us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Balance at Dec. 31, 2011 | 1,656,408us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 1,193,191us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (66,856)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 447,650us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 1,573,985us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 82,423us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 1,294,512us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 1,061,776us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (66,798)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 217,111us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 1,212,089us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 82,423us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from stock option exercise | 11,684us-gaap_ProceedsFromStockOptionsExercised |  | 0us-gaap_ProceedsFromStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_ProceedsFromStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 11,684us-gaap_ProceedsFromStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_ProceedsFromStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  |  |  |  |  |  |  |  |  |  |
Purchases to satisfy awards of common stock | 25,168us-gaap_PaymentsForRepurchaseOfCommonStock |  | 0us-gaap_PaymentsForRepurchaseOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_PaymentsForRepurchaseOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 25,168us-gaap_PaymentsForRepurchaseOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_PaymentsForRepurchaseOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  |  |  |  |  |  |  |  |  |  |
Net earnings (loss) | 105,547us-gaap_NetIncomeLoss |  |  |  |  |  | 91,551us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember |  |  |  |  |  | 26,747us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 0us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Excess tax (shortfall) from stock-based payment arrangements | (473)us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet | (473)us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (473)us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense | 3,585us-gaap_ShareBasedCompensation |  | 0us-gaap_ShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_ShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 3,585us-gaap_ShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_ShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  |  |  |  |  |  |  |  |  |  |
Valencia’s transactions with its owner | (15,630)us-gaap_PaymentsOfDividendsMinorityInterest | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  | (15,630)us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  |  |  |  |
Net earnings | 120,125us-gaap_ProfitLoss | 0us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 106,075us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 106,075us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 14,050us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 105,601us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 0us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 91,551us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 91,551us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 14,050us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 26,747us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember |  |  |  |
Preferred Stock Dividends Requirements | (528)us-gaap_DividendsPreferredStock | 0us-gaap_DividendsPreferredStock / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_DividendsPreferredStock / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |  | (528)us-gaap_DividendsPreferredStock / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_DividendsPreferredStock / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (528)us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 0us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |  | (528)us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 0us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember |  |  |  |
Total other comprehensive income (loss) | (14,774)us-gaap_OtherComprehensiveIncomeLossNetOfTax | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (14,774)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (14,774)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (14,616)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (14,616)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (14,616)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (158)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (158)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Equity contribution from parent |  |  |  |  |  |  |  |  |  |  |  |  | 0us-gaap_ProceedsFromContributionsFromParent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember |  |  |  |
Dividends declared on common stock | (46,199)us-gaap_DividendsCommonStockCash | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (46,199)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (46,199)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (34,433)us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (34,433)us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (34,433)us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (26,028)us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Balance TNMP at Dec. 31, 2012 |  |  |  |  |  |  |  |  |  |  |  |  | 463,814us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 64us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 390,366us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (216)us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 73,600us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Balance at Dec. 31, 2012 | 1,689,030us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 1,182,819us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (81,630)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 506,998us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 1,608,187us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 80,843us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 1,334,906us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 1,061,776us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (81,414)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 273,701us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 1,254,063us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 80,843us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from stock option exercise | 4,618us-gaap_ProceedsFromStockOptionsExercised |  | 0us-gaap_ProceedsFromStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_ProceedsFromStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 4,618us-gaap_ProceedsFromStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_ProceedsFromStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  |  |  |  |  |  |  |  |  |  |
Purchases to satisfy awards of common stock | 13,807us-gaap_PaymentsForRepurchaseOfCommonStock |  | 0us-gaap_PaymentsForRepurchaseOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_PaymentsForRepurchaseOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 13,807us-gaap_PaymentsForRepurchaseOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_PaymentsForRepurchaseOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  |  |  |  |  |  |  |  |  |  |
Net earnings (loss) | 100,507us-gaap_NetIncomeLoss |  |  |  |  |  | 88,155us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember |  |  |  |  |  | 29,090us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 0us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Excess tax (shortfall) from stock-based payment arrangements | (581)us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet | (581)us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (581)us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense | 5,320us-gaap_ShareBasedCompensation |  | 0us-gaap_ShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_ShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 5,320us-gaap_ShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_ShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  |  |  |  |  |  |  |  |  |  |
Valencia’s transactions with its owner | (18,335)us-gaap_PaymentsOfDividendsMinorityInterest | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  | (18,335)us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  |  |  |  |
Net earnings | 115,556us-gaap_ProfitLoss | 0us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 101,035us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 101,035us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 14,521us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 102,676us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 0us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 88,155us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 88,155us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 14,521us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 29,090us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember |  |  |  |
Preferred Stock Dividends Requirements | (528)us-gaap_DividendsPreferredStock | 0us-gaap_DividendsPreferredStock / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_DividendsPreferredStock / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |  | (528)us-gaap_DividendsPreferredStock / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_DividendsPreferredStock / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (528)us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 0us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |  | (528)us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 0us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember |  |  |  |
Total other comprehensive income (loss) | 23,490us-gaap_OtherComprehensiveIncomeLossNetOfTax | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 23,490us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 23,490us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 23,537us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 23,537us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 23,537us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (47)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (47)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Equity contribution from parent |  |  |  |  |  |  |  |  |  |  |  |  | 13,800us-gaap_ProceedsFromContributionsFromParent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 0us-gaap_ProceedsFromContributionsFromParent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 13,800us-gaap_ProceedsFromContributionsFromParent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_ProceedsFromContributionsFromParent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_ProceedsFromContributionsFromParent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Dividends declared on common stock | (54,165)us-gaap_DividendsCommonStockCash | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (54,165)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (54,165)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (155,028)us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (155,028)us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (155,028)us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (3,726)us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Balance TNMP at Dec. 31, 2013 | 1,673,569us-gaap_StockholdersEquity |  |  |  |  |  | 1,210,199us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember |  |  |  |  |  | 502,931us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 64us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 404,166us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (263)us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 98,964us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Balance at Dec. 31, 2013 | 1,750,598us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 1,178,369us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (58,140)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 553,340us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 1,673,569us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 77,029us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 1,287,228us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 1,061,776us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (57,877)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 206,300us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 1,210,199us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 77,029us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from stock option exercise | 6,999us-gaap_ProceedsFromStockOptionsExercised |  | 0us-gaap_ProceedsFromStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_ProceedsFromStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 6,999us-gaap_ProceedsFromStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_ProceedsFromStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  |  |  |  |  |  |  |  |  |  |
Purchases to satisfy awards of common stock | 17,319us-gaap_PaymentsForRepurchaseOfCommonStock |  | 0us-gaap_PaymentsForRepurchaseOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_PaymentsForRepurchaseOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 17,319us-gaap_PaymentsForRepurchaseOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_PaymentsForRepurchaseOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  |  |  |  |  |  |  |  |  |  |
Net earnings (loss) | 116,254us-gaap_NetIncomeLoss |  |  |  |  |  | 87,326us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember |  |  |  |  |  | 37,807us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 0us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Excess tax (shortfall) from stock-based payment arrangements | (135)us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet | (135)us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (135)us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense | 5,931us-gaap_ShareBasedCompensation |  | 0us-gaap_ShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_ShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 5,931us-gaap_ShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_ShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  |  |  |  |  |  |  |  |  |  |
Valencia’s transactions with its owner | (17,610)us-gaap_PaymentsOfDividendsMinorityInterest | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  | (17,610)us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_PaymentsOfDividendsMinorityInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  |  |  |  |
Net earnings | 130,909us-gaap_ProfitLoss | 0us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 116,782us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 116,782us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 14,127us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 101,453us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 0us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 87,326us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 87,326us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 14,127us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 37,807us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember |  |  |  |
Preferred Stock Dividends Requirements | (528)us-gaap_DividendsPreferredStock | 0us-gaap_DividendsPreferredStock / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_DividendsPreferredStock / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |  | (528)us-gaap_DividendsPreferredStock / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_DividendsPreferredStock / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (528)us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 0us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |  | (528)us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 0us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember |  |  |  |
Total other comprehensive income (loss) | (3,615)us-gaap_OtherComprehensiveIncomeLossNetOfTax | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (3,615)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (3,615)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (3,878)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (3,878)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (3,878)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 263us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 263us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Equity contribution from parent |  |  |  |  |  |  |  |  |  |  |  |  | 0us-gaap_ProceedsFromContributionsFromParent / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember |  |  |  |
Dividends declared on common stock | (60,138)us-gaap_DividendsCommonStockCash | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (60,138)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (60,138)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (30,263)us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (30,263)us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (30,263)us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (16,336)us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Balance TNMP at Dec. 31, 2014 | 1,721,546us-gaap_StockholdersEquity |  |  |  |  |  | 1,262,856us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember |  |  |  |  |  | 524,665us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember | 64us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 404,166us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 120,435us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = pnm_TexasNewMexicoPowerCompanyMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Balance at Dec. 31, 2014 | $ 1,795,092us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | $ 1,173,845us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ (61,755)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ 609,456us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ 1,721,546us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | $ 73,546us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | $ 1,336,402us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember | $ 1,061,776us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ (61,755)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ 262,835us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ 1,262,856us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | $ 73,546us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = pnm_PublicServiceCompanyOfNewMexicoMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  |  |  |  |

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