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v3.22.0.1

Variable Interest Entities (Details) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 USD ($) MW | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Variable Interest Entity [Line Items] |  |  |
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets | $ 6,853,583 | $ 6,402,097 | $ 6,082,456
Limited Partnerships and Similar Entities [Member] |  |  |
Variable Interest Entity [Line Items] |  |  |
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets | 79,200 |  |
Variable Interest Entity Remaining Investment Commitment Amount | $ 27,000 |  |
Minimum [Member] | Limited Partnerships and Similar Entities [Member] |  |  |
Variable Interest Entity [Line Items] |  |  |
Variable Interest Entity, Restrictions on Withdrawal of Member Capital Account | 2022 |  |
Maximum [Member] | Limited Partnerships and Similar Entities [Member] |  |  |
Variable Interest Entity [Line Items] |  |  |
Variable Interest Entity, Restrictions on Withdrawal of Member Capital Account | 2040 |  |
Variable Interest Entity, Not Primary Beneficiary [Member] | Limited Partnerships and Similar Entities [Member] | VIE Commitments [Member] |  |  |
Variable Interest Entity [Line Items] |  |  |
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets | $ 75,400 |  |
Lancaster Power Purchase Agreement [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |  |  |
Variable Interest Entity [Line Items] |  |  |
Evaluated Power Capacity | MW | 270 |  |
Variable Interest Entity, Reporting Entity Involvement, Contractual Commitment, Amount | $ 143,400 |  |
Lancaster Power Purchase Agreement [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] | Minimum [Member] |  |  |
Variable Interest Entity [Line Items] |  |  |
Average service lives for the utility plan in service | 15 years |  |
Lancaster Power Purchase Agreement [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] | Maximum [Member] |  |  |
Variable Interest Entity [Line Items] |  |  |
Average service lives for the utility plan in service | 25 years |  |

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