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Restructuring Activities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Restructuring Activities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring Reserve [Roll Forward]
Restructuring and adjustments	$ 486	$ 0	$ 2,202	$ 0
Qh Program [Member]
Restructuring Reserve [Roll Forward]
Accrued restructuring, beginning balance			18,043
Restructuring and adjustments			2,202
Cash payments			(9,592)
Currency translation adjustments			(221)
Accrued restructuring, ending balance	$ 10,432		$ 10,432