Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 180,088	$ 2,122
Accounts receivable, net of allowance for uncollectible accounts	94,624	92,800
Unbilled revenues	39,011	57,092
Other receivables	13,849	11,369
Materials, supplies, and fuel stock	68,008	71,834
Regulatory assets	0	4,534
Income taxes receivable	7,630	7,965
Other current assets	53,863	54,808
Total current assets	457,073	302,524
Other Property and Investments:
Investment securities	351,563	328,242
Equity investment in NMRD	33,528	26,564
Other investments	299	297
Non-utility property, net	6,229	3,404
Total other property and investments	391,619	358,507
Utility Plant:
Plant in service and held for future use	7,610,093	7,548,581
Less accumulated depreciation and amortization	2,641,320	2,604,177
Net plant in service and plant held for future use	4,968,773	4,944,404
Construction work in progress	225,485	194,427
Nuclear fuel, net of accumulated amortization	95,713	95,798
Net utility plant	5,289,971	5,234,629
Deferred Charges and Other Assets:
Regulatory assets	588,266	598,930
Goodwill	278,297	278,297
Operating lease right-of-use assets, net of accumulated amortization	150,426
Other deferred charges	95,106	92,664
Total deferred charges and other assets	1,112,095	969,891
Total assets	7,250,758	6,865,551
Current Liabilities:
Short-term debt	223,800	235,900
Current installments of long-term debt	172,302	0
Accounts payable	77,893	112,170
Customer deposits	10,749	10,695
Accrued interest and taxes	71,264	65,156
Regulatory liabilities	19,245	9,446
Operating lease liabilities	26,197
Dividends declared	23,231	23,231
Other current liabilities	39,452	55,855
Total current liabilities	664,133	512,453
Long-term Debt, net of Unamortized Premiums, Discounts, and Debt Issuance Costs	2,771,939	2,670,111
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	613,989	600,719
Regulatory liabilities	889,342	891,428
Asset retirement obligations	161,685	158,674
Accrued pension liability and postretirement benefit cost	96,374	100,375
Operating lease liabilities	124,937
Other deferred credits	169,372	167,668
Total deferred credits and other liabilities	2,055,699	1,918,864
Total liabilities	5,491,771	5,101,428
Commitments and Contingencies (Note 11)
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	11,529
Company common stockholders’ equity:
Common stock	1,148,364	1,153,113
Accumulated other comprehensive income (loss), net of income taxes	(103,239)	(108,684)
Retained earnings	639,554	643,953
Total stockholders' equity	1,684,679	1,688,382
Non-controlling interest in Valencia	62,779	64,212
Total equity	1,747,458	1,752,594
Total liabilities and stockholders' equity	7,250,758	6,865,551
PNM
Current Assets:
Cash and cash equivalents	12,089	85
Accounts receivable, net of allowance for uncollectible accounts	68,724	68,603
Unbilled revenues	31,366	47,113
Other receivables	14,370	10,650
Affiliate receivables	8,854	15,871
Materials, supplies, and fuel stock	63,426	67,097
Regulatory assets	0	4,534
Income taxes receivable	12,940	12,850
Other current assets	43,650	43,516
Total current assets	255,419	270,319
Other Property and Investments:
Investment securities	351,563	328,242
Other investments	93	91
Non-utility property, net	1,693	96
Total other property and investments	353,349	328,429
Utility Plant:
Plant in service and held for future use	5,664,174	5,623,520
Less accumulated depreciation and amortization	2,033,511	2,006,266
Net plant in service and plant held for future use	3,630,663	3,617,254
Construction work in progress	143,673	134,221
Nuclear fuel, net of accumulated amortization	95,713	95,798
Net utility plant	3,870,049	3,847,273
Deferred Charges and Other Assets:
Regulatory assets	454,987	460,903
Goodwill	51,632	51,632
Operating lease right-of-use assets, net of accumulated amortization	137,756
Other deferred charges	78,847	77,327
Total deferred charges and other assets	723,222	589,862
Total assets	5,202,039	5,035,883
Current Liabilities:
Short-term debt	0	42,400
Short-term debt - affiliate	0	19,800
Accounts payable	55,449	75,114
Affiliate payables	12,627	164
Customer deposits	10,749	10,695
Accrued interest and taxes	50,621	35,767
Regulatory liabilities	16,895	5,975
Operating lease liabilities	22,762
Dividends declared	132	132
Other current liabilities	26,432	32,976
Total current liabilities	195,667	223,023
Long-term Debt, net of Unamortized Premiums, Discounts, and Debt Issuance Costs	1,706,873	1,656,490
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	513,783	502,767
Regulatory liabilities	708,295	713,971
Asset retirement obligations	160,807	157,814
Accrued pension liability and postretirement benefit cost	89,338	92,981
Operating lease liabilities	115,436
Other deferred credits	215,004	215,737
Total deferred credits and other liabilities	1,802,663	1,683,270
Total liabilities	3,705,203	3,562,783
Commitments and Contingencies (Note 11)
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	11,529
Company common stockholders’ equity:
Common stock	1,264,918	1,264,918
Accumulated other comprehensive income (loss), net of income taxes	(104,265)	(110,422)
Retained earnings	261,875	242,863
Total stockholders' equity	1,422,528	1,397,359
Non-controlling interest in Valencia	62,779	64,212
Total equity	1,485,307	1,461,571
Total liabilities and stockholders' equity	5,202,039	5,035,883
Texas-New Mexico Power Company
Current Assets:
Cash and cash equivalents	162,357	0
Accounts receivable, net of allowance for uncollectible accounts	25,900	24,196
Unbilled revenues	7,645	9,979
Other receivables	881	1,721
Affiliate receivables	0	164
Materials, supplies, and fuel stock	4,582	4,737
Other current assets	1,373	1,114
Total current assets	202,738	41,911
Other Property and Investments:
Other investments	206	206
Non-utility property, net	3,468	2,240
Total other property and investments	3,674	2,446
Utility Plant:
Plant in service and held for future use	1,702,427	1,686,119
Less accumulated depreciation and amortization	491,776	487,734
Net plant in service and plant held for future use	1,210,651	1,198,385
Construction work in progress	75,332	51,459
Net utility plant	1,285,983	1,249,844
Deferred Charges and Other Assets:
Regulatory assets	133,279	138,027
Goodwill	226,665	226,665
Operating lease right-of-use assets, net of accumulated amortization	12,160
Other deferred charges	7,281	6,284
Total deferred charges and other assets	379,385	370,976
Total assets	1,871,780	1,665,177
Current Liabilities:
Short-term debt	0	17,500
Current installments of long-term debt	172,302	0
Short-term debt - affiliate	0	100
Accounts payable	14,234	23,804
Affiliate payables	4,771	1,210
Accrued interest and taxes	40,892	41,882
Regulatory liabilities	2,350	3,471
Operating lease liabilities	3,023
Other current liabilities	3,556	2,861
Total current liabilities	241,128	90,828
Long-term Debt, net of Unamortized Premiums, Discounts, and Debt Issuance Costs	626,639	575,398
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	134,757	136,238
Regulatory liabilities	181,047	177,458
Asset retirement obligations	878	860
Accrued pension liability and postretirement benefit cost	7,036	7,394
Operating lease liabilities	9,088
Other deferred credits	3,729	2,908
Total deferred credits and other liabilities	336,535	324,858
Total liabilities	1,204,302	991,084
Commitments and Contingencies (Note 11)
Company common stockholders’ equity:
Common stock	64	64
Paid-in-capital	534,166	534,166
Retained earnings	133,248	139,863
Total stockholders' equity	667,478	674,093
Total liabilities and stockholders' equity	$ 1,871,780	$ 1,665,177