XML 63 R48.htm IDEA: XBRL DOCUMENT v3.24.0.1
Regulatory Matters - Regulatory Assets, Net (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Regulatory Assets [Line Items]    
Authorized revenue, threshold percentage 2.00%  
Regulatory assets, net not earning a return $ 43,141 $ 66,373
Regulatory assets:    
Total regulatory assets 240,186 265,775
Less: current regulatory asset 4,276 19,740
Regulatory assets, less current portion 235,910 246,035
Regulatory liabilities:    
Regulatory Liabilities 464,167 122,432
Less: current regulatory liabilities 3,059 3,672
Regulatory liabilities, less current portion $ 461,108 118,760
Minimum    
Regulatory liabilities:    
Estimated service lives of assets 4 years  
Maximum    
Regulatory liabilities:    
Estimated service lives of assets 100 years  
Cost of removal    
Regulatory liabilities:    
Regulatory Liabilities $ 346,418 0
Cost of removal | Public Utilities, Property, Plant and Equipment, Accumulated Depreciation    
Regulatory liabilities:    
Regulatory Liabilities   316,647
Future income tax benefits due to customers    
Regulatory liabilities:    
Regulatory Liabilities 88,610 94,426
Unrecognized pensions and other postretirement benefits    
Regulatory liabilities:    
Regulatory Liabilities 20,196 14,307
Revenue adjustment mechanisms    
Regulatory liabilities:    
Regulatory Liabilities 5,536 9,528
Other regulatory liabilities    
Regulatory liabilities:    
Regulatory Liabilities 3,407 4,171
Future income tax benefits due to customers    
Regulatory assets:    
Total regulatory assets 157,669 137,860
Unrecognized pensions and other postretirement benefits    
Regulatory assets:    
Total regulatory assets 24,593 45,799
Business combinations debt premium    
Regulatory assets:    
Total regulatory assets 14,855 17,396
Employee benefit costs    
Regulatory assets:    
Total regulatory assets 9,815 8,068
MWRAM    
Regulatory assets:    
Total regulatory assets 9,361 10,864
Customer Assistance Program (“CAP”) balancing account    
Regulatory assets:    
Total regulatory assets 5,457 3,417
Catastrophic event memorandum accounts (“CEMA”)    
Regulatory assets:    
Total regulatory assets 4,819 3,485
2022 general rate case interim memorandum account    
Regulatory assets:    
Total regulatory assets 4,571 20,650
Water supply costs    
Regulatory assets:    
Total regulatory assets 583 9,873
Other    
Regulatory assets:    
Total regulatory assets $ 8,463 $ 8,363