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Business Transactions - Dispositions (Details) hp in Thousands, $ in Thousands	1 Months Ended				12 Months Ended			18 Months Ended
	Jul. 31, 2021 USD ($) CompressorUnit hp	Feb. 28, 2021 CompressorUnit hp	Jul. 31, 2020 USD ($)	Mar. 31, 2020 CompressorUnit hp	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2021 USD ($)
Transactions
Gain on disposition					$ 18,945	$ 12,475
Proceeds from sale					29,562	18,911	$ 80,961
Disposed of by Sale | July 2021 Dispositions
Transactions
Number of compressors | CompressorUnit	575
Compressor horsepower | hp	100
Cash consideration					60,300			$ 60,300
Gain on disposition					13,000
Disposed of by Sale | February 2021 Disposition
Transactions
Number of compressors | CompressorUnit		300
Compressor horsepower | hp		40
Gain on disposition					6,000
Disposed of by Sale | July 2020 Disposition
Transactions
Disposal Group, Not Discontinued Operation, Name of Segment			Aftermarket Services
Cash consideration received upon closing			$ 9,500
Cash consideration received on first anniversary of closing	$ 3,000
Cash received under supply agreement					$ 2,800			$ 3,500
Gain on disposition						9,300
Disposed of by Sale | March 2020 Disposition
Transactions
Number of compressors | CompressorUnit				200
Compressor horsepower | hp				35
Gain on disposition						$ 3,200
Turbocharger goods and services | July 2020 Disposition
Transactions
Term of supply agreement			2 years

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Total compressor horsepower.

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Amount of cash consideration received upon closing for the disposal of assets and liabilities, including discontinued operation.

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Amount of cash received under supply agreement.

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Number of compressor units.

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- Definition

Indicates business segment that includes disposal group not classified as discontinued operation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (f)
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Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

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-Publisher FASB
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Period covered by the long-term purchase commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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