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Summary of Significant Accounting Policies - Additional Information (Detail)
$ in Thousands
12 Months Ended
Dec. 31, 2023
USD ($)
mi
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Summary Of Accounting Policies [Line Items]      
Number of Months to Establish ROU Asset and Liability 12 months    
Operating Lease, Liability $ 13,004    
Number of Utilities that do not have cost recovery mechanism 1    
Maturity Period To Be Considered Cash Equivalents 3 months    
Contributions or Advances in Aid of Construction $ 4,200 $ 7,600  
Net property, plant and equipment 2,456,374 1,810,473  
Accumulated depreciation 516,429 462,926  
Depreciation and accretion reported in operations expenses 11,900 11,000 $ 10,200
Operating Lease, Right-of-Use Asset $ 12,426 $ 14,421  
Natural Gas Operations      
Summary Of Accounting Policies [Line Items]      
Length of pipeline | mi 26    
Minimum [Member]      
Summary Of Accounting Policies [Line Items]      
Operating Lease, Liability $ 11,000    
Maximum      
Summary Of Accounting Policies [Line Items]      
Operating Lease, Liability $ 13,000