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Revenue from Contracts with Customers (Details 1) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disaggregation of Revenue [Line Items]                      
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
Sales Direct to Consumer                      
Disaggregation of Revenue [Line Items]                      
Net Sales                 735,244 674,495 609,538
Sales to Distributors                      
Disaggregation of Revenue [Line Items]                      
Net Sales                 388,267 328,571 199,034
Equipment                      
Disaggregation of Revenue [Line Items]                      
Net Sales                 729,993 636,875 491,075
Parts and Consumables                      
Disaggregation of Revenue [Line Items]                      
Net Sales                 222,345 202,452 173,632
Specialty Surface Coatings                      
Disaggregation of Revenue [Line Items]                      
Net Sales                 29,827 31,407 29,146
Services and Other                      
Disaggregation of Revenue [Line Items]                      
Net Sales                 141,346 132,332 114,719
Americas                      
Disaggregation of Revenue [Line Items]                      
Net Sales                 690,996 640,274 607,026
Europe, Middle East and Africa                      
Disaggregation of Revenue [Line Items]                      
Net Sales                 335,603 273,738 129,046
Asia Pacific                      
Disaggregation of Revenue [Line Items]                      
Net Sales                 $ 96,912 $ 89,054 $ 72,500