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Derivative Contracts - Fair Value and Presentation in Consolidated Balance Sheets for Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Derivative [Line Items]
Derivative equity	$ 893	$ (515)	$ (781)	$ (193)
Foreign exchange contracts
Derivative [Line Items]
Derivative equity			317		$ 464
Foreign exchange contracts \| Other non-current assets
Derivative [Line Items]
Derivative Asset	21		21		0
Foreign exchange contracts \| Other current assets \| Designated as Hedging Instrument
Derivative [Line Items]
Derivative Asset	94		94		464
Foreign exchange contracts \| Accrued liabilities \| Designated as Hedging Instrument
Derivative [Line Items]
Derivative liabilities	530		530		0
Interest rate swap agreement \| Accrued liabilities \| Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative Asset	1,127		1,127		150
Derivative liabilities	$ 2,485		$ 2,485		$ 995