Revenue - Schedule of Regulated Operations Revenues: Utility Infrastructure Services Segment (Details) - Centuri - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 528,023	$ 653,293
Master services agreement
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	443,242	547,606
Bid contract
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	84,781	105,687
Unit price contracts
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	307,849	328,527
Fixed price contracts
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	110,282	166,915
Time and materials contracts
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	109,892	157,851
Gas infrastructure services
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	261,226	298,640
Gas infrastructure services | Previously Reported
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		297,408
Electric power infrastructure services
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	260,466	342,275
Electric power infrastructure services | Previously Reported
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		233,640
Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 6,331	12,378
Other | Previously Reported
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		$ 122,245