Business Reorganization (Details) $ in Thousands	1 Months Ended	9 Months Ended
	Jun. 30, 2017 employee facility	Sep. 30, 2017 USD ($)
Restructuring Reserve [Roll Forward]
Restructuring reserve		$ 0
Employee termination benefit costs		3,756
Payments		(3,008)
Foreign currency translation		(45)
Restructuring reserve		703
Facility Closing
Restructuring Cost and Reserve [Line Items]
Number of facilities eliminated | facility	2
Curtailment gain		7,217
Settlement gain		230
Expected additional costs in 2017		700
Restructuring Reserve [Roll Forward]
Employee termination benefit costs		(1,392)
Facility Closing | Muri, Switzerland
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | employee	60
Employee Severance
Restructuring Reserve [Roll Forward]
Employee termination benefit costs		3,756
Other Restructuring
Restructuring Reserve [Roll Forward]
Employee termination benefit costs		$ 2,299
Associated Spring Facility | Facility Closing
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | employee	30