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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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