Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
Current Assets:
Cash and cash equivalents	$ 28,274,000	$ 2,533,000
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	250,145,000	226,855,000
Other investments	1,762,000us-gaap_OtherLongTermInvestments	1,835,000us-gaap_OtherLongTermInvestments
Non-utility property	3,406,000	4,353,000
Total other property and investments	264,851,000pnm_TotalOtherPropertyAndInvestments	265,243,000pnm_TotalOtherPropertyAndInvestments
Utility Plant:
Plant in service and plant held for future use	5,941,581,000	5,563,061,000
Less accumulated depreciation and amortization	1,939,760,000	1,838,832,000
Net plant in service and plant held for future use	4,001,821,000	3,724,229,000
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	4,270,006,000	3,933,911,000
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	92,347,000	94,263,000
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	891,111,000	827,263,000
Regulatory liabilities	466,143,000us-gaap_RegulatoryLiabilityNoncurrent	460,649,000us-gaap_RegulatoryLiabilityNoncurrent
Asset retirement obligations	104,170,000	96,135,000
Accrued pension liability and postretirement benefit cost	110,738,000	80,046,000
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	1,676,398,000	1,574,992,000
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)	11,529,000	11,529,000
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)	(58,140,000)
Retained earnings	609,456,000	553,340,000
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	1,795,092,000	1,750,598,000
Total liabilities and stockholders' equity	5,829,325,000	5,500,210,000
Texas-New Mexico Power Company [Member]
Current Assets:
Cash and cash equivalents	1,000	1,000
Accounts receivable, net of allowance for uncollectible accounts of $1,466 and $1,423 for PNMR and PNM	19,416,000	20,125,000
Unbilled revenues	9,579,000	9,814,000
Other receivables	2,063,000	1,246,000
Materials, supplies, and fuel stock	2,769,000	2,703,000
Regulatory assets	3,875,000	5,022,000
Current portion of accumulated deferred income taxes	6,398,000	6,501,000
Other current assets	938,000	980,000
Total current assets	45,039,000	46,392,000
Other Property and Investments:
Other investments	242,000	245,000
Non-utility property	2,240,000	2,240,000
Total other property and investments	2,482,000	2,485,000
Utility Plant:
Plant in service and plant held for future use	1,182,112,000	1,074,193,000
Less accumulated depreciation and amortization	375,407,000	352,105,000
Net plant in service and plant held for future use	806,705,000	722,088,000
Construction work in progress	16,538,000	16,790,000
Net utility plant	823,243,000	738,878,000
Deferred Charges and Other Assets:
Regulatory assets	133,962,000	139,738,000
Goodwill	226,665,000	226,665,000
Other deferred charges	8,850,000	8,273,000
Total deferred charges and other assets	369,477,000	374,676,000
Total Assets	1,240,241,000	1,162,431,000
Current Liabilities:
Short-term debt	5,000,000	0
Short-term debt - affiliate	22,700,000	29,400,000
Accounts payable	14,203,000	12,543,000
Affiliate payables	2,469,000	3,181,000
Accrued interest and taxes	28,574,000	23,778,000
Other current liabilities	2,271,000	8,999,000
Total current liabilities	75,217,000	77,901,000
Long-term Debt	365,667,000	336,036,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	217,945,000	190,197,000
Regulatory liabilities	40,662,000	46,038,000
Asset retirement obligations	848,000	782,000
Accrued pension liability and postretirement benefit cost	7,888,000	3,435,000
Other deferred credits	7,349,000	5,111,000
Total deferred credits and other liabilities	274,692,000	245,563,000
Total liabilities	715,576,000	659,500,000
Commitments and Contingencies (See Note 16)
Company common stockholders’ equity:
Common stock outstanding	64,000	64,000
Paid-in-capital	404,166,000	404,166,000
Accumulated other comprehensive income (loss), net of income taxes	0	(263,000)
Retained earnings	120,435,000	98,964,000
Total PNMR common stockholders’ equity	524,665,000	502,931,000
Total liabilities and stockholders' equity	1,240,241,000	1,162,431,000
Public Service Company of New Mexico [Member]
Current Assets:
Cash and cash equivalents	25,480,000	21,000
Accounts receivable, net of allowance for uncollectible accounts of $1,466 and $1,423 for PNMR and PNM	67,622,000	70,126,000
Unbilled revenues	54,140,000	48,992,000
Other receivables	37,622,000	52,964,000
Affiliate receivables	8,853,000	10,054,000
Materials, supplies, and fuel stock	60,859,000	64,520,000
Regulatory assets	43,980,000	19,394,000
Commodity derivative instruments	11,232,000	4,064,000
Income taxes receivable	6,105,000	4,030,000
Current portion of accumulated deferred income taxes	12,418,000	43,827,000
Other current assets	53,095,000	30,510,000
Total current assets	381,406,000	348,502,000
Other Property and Investments:
Investment in PVNGS lessor notes	9,538,000	32,200,000
Available-for-sale securities	250,145,000	226,855,000
Other investments	397,000	445,000
Non-utility property	96,000	976,000
Total other property and investments	260,176,000	260,476,000
Utility Plant:
Plant in service and plant held for future use	4,581,066,000	4,314,016,000
Less accumulated depreciation and amortization	1,486,406,000	1,402,531,000
Net plant in service and plant held for future use	3,094,660,000	2,911,485,000
Construction work in progress	169,673,000	107,344,000
Nuclear fuel, net of accumulated amortization of $44,507 and $47,347 for PNMR and PNM	77,796,000	77,602,000
Net utility plant	3,342,129,000	3,096,431,000
Deferred Charges and Other Assets:
Regulatory assets	357,045,000	384,217,000
Goodwill	51,632,000	51,632,000
Commodity derivative instruments	0	3,002,000
Other deferred charges	81,264,000	83,356,000
Total deferred charges and other assets	489,941,000	522,207,000
Total Assets	4,473,652,000	4,227,616,000
Current Liabilities:
Short-term debt	0	49,200,000
Short-term debt - affiliate	0	32,500,000
Current installments of long-term debt	214,300,000	75,000,000
Accounts payable	86,055,000	84,643,000
Customer deposits	12,555,000	13,456,000
Affiliate payables	18,232,000	20,498,000
Accrued interest and taxes	29,298,000	27,665,000
Regulatory liabilities	1,703,000	1,081,000
Commodity derivative instruments	1,209,000	2,699,000
Dividends declared	132,000	132,000
Other current liabilities	52,053,000	50,392,000
Total current liabilities	415,537,000	357,266,000
Long-term Debt	1,276,357,000	1,215,618,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	715,814,000	677,094,000
Regulatory liabilities	425,481,000	414,611,000
Asset retirement obligations	103,182,000	95,225,000
Accrued pension liability and postretirement benefit cost	102,850,000	76,611,000
Commodity derivative instruments	477,000	1,094,000
Other deferred credits	86,023,000	91,340,000
Total deferred credits and other liabilities	1,433,827,000	1,355,975,000
Total liabilities	3,125,721,000	2,928,859,000
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)	11,529,000	11,529,000
Company common stockholders’ equity:
Common stock outstanding	1,061,776,000	1,061,776,000
Accumulated other comprehensive income (loss), net of income taxes	(61,755,000)	(57,877,000)
Retained earnings	262,835,000	206,300,000
Total PNMR common stockholders’ equity	1,262,856,000	1,210,199,000
Non-controlling interest in Valencia	73,546,000	77,029,000
Total equity	1,336,402,000	1,287,228,000
Total liabilities and stockholders' equity	$ 4,473,652,000	$ 4,227,616,000

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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