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Fair Value - Schedule of Activity For Energy Commodity Derivative Assets (Liabilities) Measured At Fair Value Using Significant Unobservable Inputs (Level 3) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Fair Value Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Nonoperating Income (Expense) | Other Nonoperating Income (Expense) | Other Nonoperating Income (Expense) | Other Nonoperating Income (Expense)
Level 3 [Member] |  |  |  |
Fair Value Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning Balance | $ 36,732 | $ (2,289) | $ 36,550 | $ (7,771)
Transfers in |  | 1,952 |  | 1,952
Included in regulatory assets/liabilities | (3,652) | (4,551) | 2,115 | 3,144
Recognized in net income | 2,024 | 3,829 | (3,174) | 3,829
Purchases |  |  | 2,367 |
Settlements |  |  | 246 | (2,213)
Other |  |  | (3,000) |
Ending Balance | 35,104 | (1,059) | 35,104 | (1,059)
Natural Gas Exchange Agreements [Member] | Level 3 [Member] |  |  |  |
Fair Value Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning Balance | (11,721) | (2,289) | (17,734) | (7,771)
Included in regulatory assets/liabilities | (3,652) | (4,551) | 2,115 | 3,144
Settlements |  |  | 246 | (2,213)
Ending Balance | (15,373) | (6,840) | (15,373) | (6,840)
Equity Investment [Member] | Level 3 [Member] |  |  |  |
Fair Value Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning Balance | 48,453 |  | 54,284 |
Transfers in |  | 1,952 |  | 1,952
Recognized in net income | 2,024 | 3,829 | (3,174) | 3,829
Purchases and debt conversions |  |  | 2,367 |
Other |  |  | (3,000) |
Ending Balance | $ 50,477 | $ 5,781 | $ 50,477 | $ 5,781

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- Definition Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Realized And Unrealized Gains Losses Included In Regulatory Assets + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of gain (loss) recognized in income from derivative asset (liability) after deduction of derivative liability (asset), measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-3 + Details
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