Acquisitions - Hysitron (Details) - Hysitron, Incorporated $ in Millions	Jan. 23, 2017 USD ($)
Acquisitions
Ownership percentage acquired	100.00%
Contingent consideration	$ 1.6
Contingent payments related to acquisition	$ 1.1
Technology, Customer Relationships and Trade Names
Acquisitions
Amortization period for intangible assets acquired	7 years
Customer Relationships, Trade Marks and Other Intangible
Acquisitions
Amortization period for intangible assets acquired	5 years
Maximum
Acquisitions
Contingent consideration	$ 10.0

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

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Amount of cash outflow, made soon after acquisition date of business combination, to settle contingent consideration liability.

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