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Restructuring Activities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Restructuring Activities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Restructuring Reserve [Roll Forward]
Restructuring and related charges	$ 298	$ 486	$ 1,473	$ 2,202
QH Program [Member]
Restructuring Reserve [Roll Forward]
Accrued Restructuring, Beginning Balance			8,248
Restructuring and related charges			1,473
Cash Payments			(4,214)
Currency Translation Adjustments			(229)
Accrued Restructuring, Ending Balance	$ 5,278		$ 5,278