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Electric Operating Revenue Change in Contract Liabilities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Beginning balance	$ 349
Consideration received in advance of service to be provided	6,172
Deferred revenue earned	(6,172)
Ending balance	349
Public Service Company of New Mexico
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Beginning balance	349
Consideration received in advance of service to be provided	4,660
Deferred revenue earned	(4,660)
Ending balance	349
Texas-New Mexico Power Company
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Beginning balance	0
Consideration received in advance of service to be provided	1,512
Deferred revenue earned	(1,512)
Ending balance	$ 0

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044

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