Schedule II - Valuation and Qualifying Accounts (Details) - SEC Schedule, 12-09, Reserve, Allowance For Doubtful Accounts - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	$ 7,265	$ 8,333	$ 1,163
Charged to costs and expenses	3,758	4,663	3,527
Charged to other accounts	0	826	6,070
Write-offs and other	6,098	6,557	2,427
Balance at end of year	4,925	7,265	8,333
Public Service Company of New Mexico
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	7,265	8,333	1,163
Charged to costs and expenses	3,758	4,597	3,482
Charged to other accounts	0	826	6,070
Write-offs and other	6,098	6,491	2,382
Balance at end of year	4,925	7,265	8,333
Texas-New Mexico Power Company
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	0	0	0
Charged to costs and expenses	0	66	45
Charged to other accounts	0	0	0
Write-offs and other	0	66	45
Balance at end of year	$ 0	$ 0	$ 0