Restructuring Costs - Schedule of Restructuring liabilities (Details) - USD ($) $ in Thousands	3 Months Ended						12 Months Ended		24 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019
Restructuring Reserve [Roll Forward]
Beginning balance				$ 3,806			$ 3,806
Cost incurred and charged to expense	$ 1,418	$ 152	$ 1,795	$ 1,673	$ 3,836	$ 403	5,038	$ 4,239	$ 9,277
Cost paid or otherwise settled							(6,673)
Effect of change in exchange rates							1
Ending balance	$ 2,172				$ 3,806		2,172	3,806	2,172
Severance and related charges
Restructuring Reserve [Roll Forward]
Cost incurred and charged to expense							3,041	$ 4,239	7,280
Facility relocation and closure charges
Restructuring Reserve [Roll Forward]
Cost incurred and charged to expense							$ 1,996		$ 1,996