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Revenue - Schedule of Regulated Operations Revenues: Utility Infrastructure Services Segment (Details) - Centuri - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2022
Mar. 31, 2021
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers $ 523,877 $ 363,975 $ 2,318,563 $ 1,978,770
Master services agreement        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 356,543 293,680 1,715,841 1,520,144
Bid contract        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 167,334 70,295 602,722 458,626
Unit price contracts        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 302,523 234,449 1,437,156 1,347,953
Fixed price contracts        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 86,537 34,594 319,685 164,750
Time and materials contracts        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 134,817 94,932 561,722 466,067
Gas infrastructure services        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 260,682 221,837 1,341,185 1,265,288
Electric power infrastructure services        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 181,968 93,961 613,209 433,467
Other        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers $ 81,227 $ 48,177 $ 364,169 $ 280,015