Consolidated Statements of Earnings - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Electric Operating Revenues	$ 1,362,951	$ 1,439,082	$ 1,435,853
Operating Expenses:
Cost of energy	380,596	464,649	471,556
Administrative and general	191,514	179,100	171,111
Energy production costs	146,187	176,752	185,638
Regulatory disallowances and restructuring costs	15,011	167,471	1,062
Depreciation and amortization	209,110	185,919	172,634
Transmission and distribution costs	66,227	69,157	66,571
Taxes other than income taxes	76,321	71,684	67,584
Total operating expenses	1,084,966	1,314,732	1,136,156
Operating income	277,985	124,350	299,697
Other Income and Deductions:
Interest income	22,293	6,498	8,483
Gains on available-for-sale securities	19,517	16,060	10,527
Other income	17,796	26,833	12,048
Other (deductions)	(13,784)	(12,728)	(10,481)
Net other income and deductions	45,822	36,663	20,577
Interest Charges	128,633	114,860	119,627
Earnings before Income Taxes	195,174	46,153	200,647
Income Taxes	63,278	15,075	69,738
Net Earnings	131,896	31,078	130,909
(Earnings) Attributable to Valencia Non-controlling Interest	(14,519)	(14,910)	(14,127)
Preferred Stock Dividend Requirements of Subsidiary	(528)	(528)	(528)
Net Earnings Attributable to Company	116,849	15,640	116,254
Net Earnings (Loss) Available for PNM Common Stock	$ 116,849	$ 15,640	$ 116,254
Net Earnings Attributable to PNMR per Common Share:
Basic (dollars per share)	$ 1.47	$ 0.20	$ 1.46
Diluted (dollars per share)	$ 1.46	$ 0.20	$ 1.45
Public Service Company of New Mexico [Member]
Electric Operating Revenues	$ 1,035,913	$ 1,131,195	$ 1,147,914
Operating Expenses:
Cost of energy	299,714	391,131	403,626
Administrative and general	169,209	161,953	152,645
Energy production costs	146,187	176,752	185,638
Regulatory disallowances and restructuring costs	15,011	167,471	1,062
Depreciation and amortization	133,447	115,717	109,524
Transmission and distribution costs	39,657	43,642	43,128
Taxes other than income taxes	44,598	41,149	39,578
Total operating expenses	847,823	1,097,815	935,201
Operating income	188,090	33,380	212,713
Other Income and Deductions:
Interest income	10,173	6,574	8,557
Gains on available-for-sale securities	19,517	16,060	10,527
Other income	12,088	19,347	8,949
Other (deductions)	(9,539)	(8,493)	(7,218)
Net other income and deductions	32,239	33,488	20,815
Interest Charges	87,469	79,950	79,442
Earnings before Income Taxes	132,860	(13,082)	154,086
Income Taxes	40,922	(12,758)	52,633
Net Earnings	91,938	(324)	101,453
(Earnings) Attributable to Valencia Non-controlling Interest	(14,519)	(14,910)	(14,127)
Preferred Stock Dividend Requirements of Subsidiary	(528)	(528)	(528)
Net Earnings Attributable to Company	77,419	(15,234)	87,326
Net Earnings (Loss) Available for PNM Common Stock	76,891	(15,762)	86,798
Texas-New Mexico Power Company [Member]
Electric Operating Revenues	327,038	307,887	287,939
Operating Expenses:
Cost of energy	80,882	73,518	67,930
Administrative and general	39,423	36,755	36,982
Depreciation and amortization	61,126	56,285	50,056
Transmission and distribution costs	26,570	25,515	23,443
Taxes other than income taxes	27,396	25,781	23,940
Total operating expenses	235,397	217,854	202,351
Operating income	91,641	90,033	85,588
Other Income and Deductions:
Other income	4,629	4,240	2,865
Other (deductions)	(1,427)	(504)	(727)
Net other income and deductions	3,202	3,736	2,138
Interest Charges	29,335	27,681	27,396
Earnings before Income Taxes	65,508	66,088	60,330
Income Taxes	23,836	24,125	22,523
Net Earnings Attributable to Company	$ 41,672	$ 41,963	$ 37,807