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Business Combinations - Assets Acquired & Liabilities Assumed (Details 2) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Business Acquisition [Line Items] |  |  |
Goodwill | $ 765,386,000 | $ 714,963,000 | $ 681,358,000
Asset Retirement Obligation | 468,686,000 | 446,919,000 | $ 417,575,000
2020 Acquisition [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Gross Aggregate Consideration |  | 110,200,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents |  | 1,700,000 |
Business Combination, Consideration Transferred |  | 106,000,000 |
Business Combination, Consideration Transferred, Liabilities Incurred | $ 2,500,000 | 2,500,000 |
Business Combination, Current Assets |  | 54,800,000 |
Business Combination, Property, Plant, and Equipment |  | 27,100,000 |
Goodwill |  | 33,600,000 |
Business Combination, Other Intangible Assets |  | 19,000,000 |
Business Combination, Current Liabilities |  | 22,600,000 |
Business Combination, Noncurrent Liabilities |  | 300,000 |
Asset Retirement Obligation |  | $ 1,400,000 |

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- Definition The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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