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Income Taxes - Summary of Significant Factors Impact on Difference Between Effective Tax Rate and Federal Statutory Rate (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Income Tax Disclosure [Abstract] |  |
Federal income taxes at statutory rates | $ 10,126 | $ 12,753
Flow through related to deduction of meters and mixed service costs | (13,523) | (17,434)
Tax effect of regulatory treatment of utility plant differences | (3,687) | (6,322)
State income tax expense | 566 | 823
Settlement of prior year tax returns |  | (19)
Other | (110) | (637)
Total income tax benefit | $ (6,628) | $ (10,836)
Federal income taxes at statutory rates | 21.00% | 21.00%
Flow through related to deduction of meters and mixed service costs | (28.00%) | (28.70%)
Tax effect of regulatory treatment of utility plant differences | (7.70%) | (10.40%)
State income tax expense | 1.20% | 1.40%
Other | (0.20%) | (1.10%)
Total income tax benefit | (13.70%) | (17.80%)

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
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