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Regulatory Matters - Summary of Utilities Rate Plans (RECO) (Details) - RECO - USD ($) $ in Thousands |  | 1 Months Ended
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Jan. 01, 2022 | Jan. 31, 2022
Public Utilities, General Disclosures [Line Items] |  |
Regulatory liabilities, amortization period | 3 years |
Amortization to income of net regulatory assets | $ 9,200 |
Regulatory assets, amortization period (in years) | 3 years |
Weighted average cost of capital (after-tax) | $ 262,800 |
Weighted average cost of capital (after-tax) (percent) |  | 7.08%
Authorized return on common equity (percent) |  | 9.60%
Cost of long-term debt (percent) |  | 4.74%
Common equity ratio (percent) |  | 48.51%
Tropical Storm Henri |  |
Public Utilities, General Disclosures [Line Items] |  |
Amortization to income of net regulatory assets | $ 2,400 |
Regulatory assets, amortization period (in years) | 3 years |
Rate Plan for Year 1 |  |
Public Utilities, General Disclosures [Line Items] |  |
Base rate changes |  | $ 9,650
Actual return on common equity (percent) | 9.60% |
Rate Plan for Year 2 |  |
Public Utilities, General Disclosures [Line Items] |  |
Actual return on common equity (percent) | 9.70% |
Period 1 |  |
Public Utilities, General Disclosures [Line Items] |  |
Amortizations to income of net regulatory (assets) and liabilities | $ 200 |
Regulatory liabilities, amortization period | 3 years |
Period 2 |  |
Public Utilities, General Disclosures [Line Items] |  |
Amortizations to income of net regulatory (assets) and liabilities | $ 10,000 |

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