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Segment Reporting Textuals (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Charges	$ 12,772	$ 6,235	$ 11,148
Maximum Customer Percentage	1.00%
U.S. Operations Segment
Restructuring Charges	$ 6,200	2,000
Swiss Operations Segment
Restructuring Charges	1,800	1,500
Western European Operations Segment
Restructuring Charges	3,000	2,400
Chinese Operations Segment
Restructuring Charges	800	200
Other Operations Segment
Restructuring Charges	$ 1,000	$ 200

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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