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Nature of Operations and Summary of Significant Accounting Policies - Revenue Recognition by Product Line, Product Type, Geography and Revenue Recognition Method (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 29, 2018 | Sep. 30, 2017 | Sep. 29, 2018 | Sep. 30, 2017
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 165,745 | $ 152,794 | $ 469,851 | $ 365,893
Point in Time [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 148,524 |  | 436,527 |
Over Time [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 17,221 |  | 33,324 |
North America [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 74,089 | 68,369 | 227,080 | 170,092
Europe [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 44,912 | 46,475 | 131,437 | 113,178
Asia [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 32,887 | 25,215 | 78,537 | 53,658
Rest of World [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 13,857 | 12,735 | 32,797 | 28,965
Parts and Consumables [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 92,749 | 83,755 | 283,591 | 224,239
Capital [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 72,996 | 69,039 | 186,260 | 141,654
Operating Segment [Member] | Papermaking Systems [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 126,770 | 111,135 | 350,811 | 295,416
Operating Segment [Member] | Papermaking Systems [Member] | Stock preparation [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 62,983 | 52,065 | 164,842 | 139,396
Operating Segment [Member] | Papermaking Systems [Member] | Fluid handling [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 33,083 | 28,532 | 98,500 | 73,099
Operating Segment [Member] | Papermaking Systems [Member] | Doctoring, Cleaning and Filtration [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 30,704 | 30,538 | 87,469 | 82,921
Operating Segment [Member] | Wood Processing Systems Segment [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 37,042 | 39,714 | 109,335 | 61,050
Corporate And Reconciling Items [Member] | Fiber based Products [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 1,933 | $ 1,945 | $ 9,705 | $ 9,427

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