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Lease Commitments - Schedule of Information Related to Operating Leases Recorded on the Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Operating leases:
Operating lease assets, net of amortization	$ 272,894	$ 182,201
Current portion of operating lease liabilities	14,293	12,267
Long-term portion of operating lease liabilities	255,376	167,000
PNM
Operating leases:
Operating lease assets, net of amortization	271,433	180,370
Current portion of operating lease liabilities	13,542	11,371
Long-term portion of operating lease liabilities	254,702	166,191
TNMP
Operating leases:
Operating lease assets, net of amortization	923	1,814
Current portion of operating lease liabilities	713	895
Long-term portion of operating lease liabilities	$ 167	$ 809

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- Definition

Operating Lease, Assets and Liabilities, Lessee [Abstract]

+ References

No definition available.

+ Details

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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-1

+ Details

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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-1

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- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-1

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