Other Commitments and Contingencies - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Subsequent Event [Line Items]
Intercompany Agreements, Description	three years
Debt Service Coverage Ratio	1.25
Time to cure ratio	5 days
Ratio based on average number of prior quarters	6
Funds from operations interest coverage ratio minimum times	2
Total debt to capital maximum	65
Number Of Years to Collect Benefits	20 years
Total purchase obligations for 2018	$ 83,521
Total purchase obligations for 2019 - 2020	82,815
Total purchase obligations for 2021 - 2022	71,327
Total purchase obligations thereafter	144,768
Aggregate guaranteed amount	20,000
Guarantor Obligations, Current Carrying Value	13,500
Amount of letter of credit to our current primary insurance company	5,800
Specific Purpose
Subsequent Event [Line Items]
Guarantor Obligations, Current Carrying Value	11,100
Rate Case
Subsequent Event [Line Items]
Guarantor Obligations, Current Carrying Value	$ 7,100