Segment Reporting Textuals (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
Operating Lease, Right-of-Use Asset	$ 87,317			$ 92,700
Restructuring Charges	$ 15,760	$ 18,420	$ 12,772
Maximum Customer Percentage	1.00%
U.S. Operations Segment
Operating Lease, Right-of-Use Asset	$ 38,300
Restructuring Charges	4,200	11,000	6,200
Swiss Operations Segment
Operating Lease, Right-of-Use Asset	1,300
Restructuring Charges	3,400	4,000	1,800
Western European Operations Segment
Operating Lease, Right-of-Use Asset	20,100
Restructuring Charges	6,900	2,800	3,000
Chinese Operations Segment
Operating Lease, Right-of-Use Asset	3,000
Restructuring Charges	500	300	800
Other Operations Segment
Operating Lease, Right-of-Use Asset	22,700
Restructuring Charges	800	$ 300	$ 1,000
Eliminations and Corporate Segment
Operating Lease, Right-of-Use Asset	$ 1,900