Business Reorganization (Details) $ in Thousands	1 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2017 USD ($) employee facility	Jun. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)
Restructuring Reserve [Roll Forward]
Restructuring reserve			$ 0
Restructuring charges			3,931
Payments			0
Restructuring reserve	$ 3,931	$ 3,931	3,931
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	$ 2,000	2,000	$ 2,000
Restructuring Reserve [Roll Forward]
Restructuring charges		(1,652)
Facility Closing | Muri, Switzerland
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | employee	60
Employee Severance
Restructuring Reserve [Roll Forward]
Restructuring charges		3,931
Other Restructuring
Restructuring Reserve [Roll Forward]
Restructuring charges		$ 1,864
Associated Spring Facility | Facility Closing
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | employee	30