Background, Organization, and Summary of Significant Accounting Policies - Schedule of Goodwill (Details) $ in Thousands	3 Months Ended
Mar. 31, 2022 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 1,781,332
Foreign currency translation adjustment	1,603
Goodwill, ending balance	1,773,671
Riggs Distler
Goodwill [Roll Forward]
Measurement period adjustments	(574)
MountainWest
Goodwill [Roll Forward]
Measurement period adjustments	(8,690)
Natural Gas Distribution
Goodwill [Roll Forward]
Goodwill, beginning balance	10,095
Foreign currency translation adjustment	0
Goodwill, ending balance	10,095
Natural Gas Distribution \| Riggs Distler
Goodwill [Roll Forward]
Measurement period adjustments	0
Natural Gas Distribution \| MountainWest
Goodwill [Roll Forward]
Measurement period adjustments	0
Utility Infrastructure Services
Goodwill [Roll Forward]
Goodwill, beginning balance	785,058
Foreign currency translation adjustment	1,603
Goodwill, ending balance	786,087
Utility Infrastructure Services \| Riggs Distler
Goodwill [Roll Forward]
Measurement period adjustments	(574)
Utility Infrastructure Services \| MountainWest
Goodwill [Roll Forward]
Measurement period adjustments	0
Pipeline and Storage
Goodwill [Roll Forward]
Goodwill, beginning balance	986,179
Foreign currency translation adjustment	0
Goodwill, ending balance	977,489
Pipeline and Storage \| Riggs Distler
Goodwill [Roll Forward]
Measurement period adjustments	0
Pipeline and Storage \| MountainWest
Goodwill [Roll Forward]
Measurement period adjustments	$ (8,690)

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 55
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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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