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Property, Plant and Equipment - Assets Amortized by Units of Production (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |
Unproved Gas Properties | $ 724,401 | $ 734,890
Total | 12,537,118 | 11,907,698
Assets amortized by units of production |  |
Property, Plant and Equipment [Line Items] |  |
Unproved Gas Properties | 724,401 | 734,890
Advance Royalties | 1,597 | 1,130
Total | $ 725,998 | $ 736,020

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- Definition Discloses the period end balance sheet amount of advances for gas exploration, development and production. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 932 -SubTopic 835 -Section 25 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482104/932-835-25-2 + Details
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- Definition Oil and Gas properties with unproved reserves under the successful effort method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 932 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//932/tableOfContent Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482274/932-235-50-14 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -Section 25 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482479/932-360-25-3 + Details
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