Lease Commitments - Schedule of Supplemental Cash Flows Related to Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 26,129	$ 27,121
Operating cash flows from financing leases	128	136
Financing cash flows from financing leases	1,296	936
Non-cash information related to right-of-use assets obtained in exchange for lease obligations:
Operating leases	317	0
Financing leases	6,958	15,614
Public Service Company of New Mexico
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	25,655	26,007
Operating cash flows from financing leases	90	82
Financing cash flows from financing leases	870	557
Non-cash information related to right-of-use assets obtained in exchange for lease obligations:
Operating leases	0	0
Financing leases	3,792	6,588
Texas-New Mexico Power Company
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	323	596
Operating cash flows from financing leases	34	48
Financing cash flows from financing leases	339	307
Non-cash information related to right-of-use assets obtained in exchange for lease obligations:
Operating leases	317	0
Financing leases	$ 3,126	$ 8,985