Supplemental Financial Information (Severance and Related Benefits Activity) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Reserve [Roll Forward]
Provisions	$ 12,348	$ 948	$ 2,532
Severance and Related Benefits
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2019	0
Provisions	11,451
Payments	(819)
Foreign currency translation adjustment	371
Balance as of December 31, 2020	$ 11,003	$ 0

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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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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Amount of foreign currency translation gain (loss) which decreases (increases) the restructuring reserve.

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