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Valuation and Qualifying Accounts and Reserves (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Allowance for doubtful accounts:      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance, beginning of period $ 4,600 $ 3,891 $ 1,512
Charged to expense 1,195 932 (177)
Charged to regulatory asset 265 1,610 3,032
Accounts written off (2,248) (2,394) (800)
Recoveries of accounts written off 1,941 561 324
Balance, end of period 5,753 4,600 3,891
Reserve for litigation and claims:      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance, beginning of period 607 684 2,898
Charged to expense 1,583 916 958
Accounts written off (62) (50) (122)
Payments (360) (943) (3,050)
Balance, end of period $ 1,768 $ 607 $ 684