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Significant Accounting Policies - Property, Plant and Equipment (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Property, Plant and Equipment [Line Items] |  |  |
Depreciation, depletion and amortization | $ 433,586 | $ 461,215 | $ 515,118
Gas Properties |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Depreciation, depletion and amortization | $ 332,596 | $ 359,761 | $ 415,069
Buildings and Improvements | Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life of property, plant and equipment | 10 years |  |
Buildings and Improvements | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life of property, plant and equipment | 45 years |  |
Machinery and Equipment | Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life of property, plant and equipment | 3 years |  |
Machinery and Equipment | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life of property, plant and equipment | 25 years |  |
Gathering and Transmission | Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life of property, plant and equipment | 30 years |  |
Gathering and Transmission | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life of property, plant and equipment | 40 years |  |
Purchased Software |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life of property, plant and equipment | 7 years |  |

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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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