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Realignment Costs - Additional information (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Realignment Costs
Realignment costs	$ 10,012	$ (492)	$ (584)	$ 6,778
Accrued realignment costs	$ 9,693		491	6,437	$ 1,458
Accrual And Other Current Liabilities [Member]
Realignment Costs
Accrued realignment costs			$ 491	$ 6,437

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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