Sale of Business - Narrative (Details)		3 Months Ended		9 Months Ended
	Jun. 25, 2020 USD ($) numberOfSubsidiaries	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Currency translation adjustment loss		$ (14,000)	$ 2,443,000	$ 52,074,000	$ 2,443,000
Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of subsidiaries sold | numberOfSubsidiaries	5
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down	$ 57,300,000
Currency translation adjustment loss	(52,074,000)
Goodwill allocated	3,000,000
Portion of sales price received on closing	2,500,000
Cash included in net assets sold	6,100,000
Cash outflow at closing	3,600,000
Payments received from disposal		$ 2,900,000
Disposal Group, Including Discontinued Operation, Working Capital	$ 21,900,000