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Segment Reporting (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Segment Reporting [Abstract]
Number of operating segments									4
Number of reportable segments									1
Number of customers exceeding ten percent of net sales									0
Concentration Risk, Percentage									10.00%
Revenues from External Customers and Long-Lived Assets
Net Sales	$ 285,212	$ 273,255	$ 292,197	$ 272,847	$ 279,295	$ 261,921	$ 270,791	$ 191,059	$ 1,123,511	$ 1,003,066	$ 808,572
Long-Lived Assets	508,413				559,728				508,413	559,728	158,677
Equipment
Revenues from External Customers and Long-Lived Assets
Net Sales									729,993	636,875	491,075
Parts and consumables
Revenues from External Customers and Long-Lived Assets
Net Sales									222,345	202,452	173,632
Service and other
Revenues from External Customers and Long-Lived Assets
Net Sales									141,346	132,332	114,719
Specialty surface coatings
Revenues from External Customers and Long-Lived Assets
Net Sales									29,827	31,407	29,146
Americas
Revenues from External Customers and Long-Lived Assets
Net Sales									690,996	640,274	607,026
Long-Lived Assets	118,609				132,659				118,609	132,659	134,737
Europe, Middle East, Africa
Revenues from External Customers and Long-Lived Assets
Net Sales									335,603	273,738	129,046
Long-Lived Assets	385,659				422,338				385,659	422,338	19,606
Asia Pacific
Revenues from External Customers and Long-Lived Assets
Net Sales									96,912	89,054	72,500
Long-Lived Assets	4,145				4,731				4,145	4,731	$ 4,334
ITALY
Revenues from External Customers and Long-Lived Assets
Long-Lived Assets	$ 355,460				$ 393,917				$ 355,460	$ 393,917

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The number of customers exceeding ten percent of net sales.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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