Business Transactions - Dispositions (Details) hp in Thousands, $ in Thousands			3 Months Ended	9 Months Ended
	Jul. 09, 2020 USD ($)	Mar. 01, 2020 CompressorUnit hp	Sep. 30, 2020 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on disposition				$ 12,475	$ 0
Disposed of by Sale, Not Discontinued Operations | July 2020 Disposition
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Not Discontinued Operation, Name of Segment [Extensible List]	Aftermarket Services Segment [Member]
Cash consideration received upon closing	$ 9,500
Cash consideration receivable on first anniversary	3,000
Amount of consideration receivable as credit for purchases	$ 3,500
Gain on disposition			$ 9,300	9,300
Disposed of by Sale, Not Discontinued Operations | March 2020 Disposition
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of compressors | CompressorUnit		200
Compressor units horsepower (horsepower) | hp		35
Gain on disposition				$ 3,200
Turbocharger goods and services | July 2020 Disposition
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Term of supply agreement	2 years