Consolidated Statements of Earnings - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Electric Operating Revenues	$ 1,439,082	$ 1,435,853	$ 1,387,923
Operating Expenses:
Cost of energy	464,649	471,556	432,316
Administrative and general	179,100	171,111	179,210
Energy production costs	176,752	185,638	175,819
Regulatory disallowances and restructuring costs	167,471	1,062	12,235
Depreciation and amortization	185,919	172,634	166,881
Transmission and distribution costs	69,157	66,571	70,124
Taxes other than income taxes	71,684	67,584	64,496
Total operating expenses	1,314,732	1,136,156	1,101,081
Operating income	124,350	299,697	286,842
Other Income and Deductions:
Interest income	6,498	8,483	10,043
Gains on available-for-sale securities	16,060	10,527	10,612
Other income	26,833	12,048	10,572
Other (deductions)	(12,728)	(10,481)	(21,552)
Net other income and deductions	36,663	20,577	9,675
Interest Charges	114,860	119,627	121,448
Earnings before Income Taxes	46,153	200,647	175,069
Income Taxes	15,075	69,738	59,513
Net Earnings	31,078	130,909	115,556
(Earnings) Attributable to Valencia Non-controlling Interest	(14,910)	(14,127)	(14,521)
Preferred Stock Dividends Requirements	(528)	(528)	(528)
Net Earnings Attributable to Company	15,640	116,254	100,507
Net Earnings (Loss) Available for PNM Common Stock	$ 15,640	$ 116,254	$ 100,507
Net Earnings Attributable to PNMR per Common Share:
Basic (dollars per share)	$ 0.20	$ 1.46	$ 1.26
Diluted (dollars per share)	$ 0.20	$ 1.45	$ 1.25
Public Service Company of New Mexico [Member]
Electric Operating Revenues	$ 1,131,195	$ 1,147,914	$ 1,116,312
Operating Expenses:
Cost of energy	391,131	403,626	374,710
Administrative and general	161,953	152,645	157,144
Energy production costs	176,752	185,638	175,819
Regulatory disallowances and restructuring costs	167,471	1,062	12,235
Depreciation and amortization	115,717	109,524	103,826
Transmission and distribution costs	43,642	43,128	45,936
Taxes other than income taxes	41,149	39,578	37,457
Total operating expenses	1,097,815	935,201	907,127
Operating income	33,380	212,713	209,185
Other Income and Deductions:
Interest income	6,574	8,557	10,182
Gains on available-for-sale securities	16,060	10,527	10,612
Other income	19,347	8,949	7,650
Other (deductions)	(8,493)	(7,218)	(6,974)
Net other income and deductions	33,488	20,815	21,470
Interest Charges	79,950	79,442	79,175
Earnings before Income Taxes	(13,082)	154,086	151,480
Income Taxes	(12,758)	52,633	48,804
Net Earnings	(324)	101,453	102,676
(Earnings) Attributable to Valencia Non-controlling Interest	(14,910)	(14,127)	(14,521)
Preferred Stock Dividends Requirements	(528)	(528)	(528)
Net Earnings Attributable to Company	(15,234)	87,326	88,155
Net Earnings (Loss) Available for PNM Common Stock	(15,762)	86,798	87,627
Texas-New Mexico Power Company [Member]
Electric Operating Revenues	307,887	287,939	271,611
Operating Expenses:
Cost of energy	73,518	67,930	57,606
Administrative and general	36,755	36,982	44,635
Depreciation and amortization	56,285	50,056	50,219
Transmission and distribution costs	25,515	23,443	24,188
Taxes other than income taxes	25,781	23,940	22,778
Total operating expenses	217,854	202,351	199,426
Operating income	90,033	85,588	72,185
Other Income and Deductions:
Other income	4,240	2,865	2,377
Other (deductions)	(504)	(727)	(458)
Net other income and deductions	3,736	2,138	1,919
Interest Charges	27,681	27,396	27,393
Earnings before Income Taxes	66,088	60,330	46,711
Income Taxes	24,125	22,523	17,621
Net Earnings Attributable to Company	$ 41,963	$ 37,807	$ 29,090