Discontinued Operations - Narrative (Details) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	May 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment expense - Disc Ops				$ 126,285	$ 295,239
Level 3 | Customer Relationships | Measurement Input, Weighted Average Long-term Revenue Growth Rate
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Measurement input		0.024		0.024
Level 3 | Customer Relationships | Measurement Input, Weighted Average Cost of Capital
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Measurement input		0.12		0.12
Level 3 | Customer Relationships | Measurement Input, Customer Attrition Factor
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Measurement input		0.10		0.10
Minimum | Level 3 | Customer Relationships | Measurement Input, Long-term Revenue Growth Rate
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Measurement input		0.02		0.02
Maximum | Level 3 | Customer Relationships | Measurement Input, Long-term Revenue Growth Rate
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Measurement input		0.055		0.055
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on sale of AMECO North America				$ (24,864)	0
Impairment expense - Disc Ops		$ 0	$ 0
AMECO | Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Sales of Business, Affiliate and Productive Assets	$ 71,000
Loss on sale of AMECO North America	$ (25,000)			(24,864)	0
Impairment expense - Disc Ops		4,809		53,085	100,000
AMECO | Discontinued Operations | Fair value adjustment and expected costs associated with sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment expense - Disc Ops		$ 4,809		$ 53,085	$ 87,700