Lease Commitments - Finance Lease Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financing leases:
Non-utility property	$ 36,853	$ 31,695
Accumulated depreciation	(14,340)	(9,660)
Non-utility property, net	22,513	22,035
Other current liabilities	6,827	5,813
Other deferred credits	15,602	16,075
PNM
Financing leases:
Non-utility property	18,151	15,171
Accumulated depreciation	(6,843)	(4,550)
Non-utility property, net	11,308	10,621
Other current liabilities	3,248	2,731
Other deferred credits	7,962	7,732
TNMP
Financing leases:
Non-utility property	18,372	16,181
Accumulated depreciation	(7,256)	(4,923)
Non-utility property, net	11,116	11,258
Other current liabilities	3,508	2,994
Other deferred credits	$ 7,620	$ 8,273