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Business Segment and Geographical Information - Revenues and Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 30, 2017 | Sep. 30, 2017 | Jul. 01, 2017 | Apr. 01, 2017 | Dec. 31, 2016 | Oct. 01, 2016 | Jul. 02, 2016 | Apr. 02, 2016 | Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016
Revenues by Product Line: |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 149,140 | $ 152,794 | $ 110,242 | $ 102,857 | $ 100,241 | $ 105,519 | $ 111,828 | $ 96,538 | $ 515,033 | $ 414,126 | $ 390,107
Income from Continuing Operations Before Provision for Income Taxes: |  |  |  |  |  |  |  |  |  |  |
Total operating income (loss) |  |  |  |  |  |  |  |  | 60,753 | 45,573 | 50,119
Interest expense, net (d) |  |  |  |  |  |  |  |  | (3,100) | (1,024) | (748)
Income from Continuing Operations Before Provision for Income Taxes |  |  |  |  |  |  |  |  | 57,653 | 44,549 | 49,371
Total Assets: |  |  |  |  |  |  |  |  |  |  |
Total Assets | 761,094 |  |  |  | 470,691 |  |  |  | 761,094 | 470,691 | 415,498
Depreciation and Amortization: |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 19,375 | 14,326 | 10,821
Capital Expenditures: |  |  |  |  |  |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 17,281 | 5,804 | 5,479
Long-lived assets | 79,723 |  |  |  | 47,704 |  |  |  | 79,723 | 47,704 | 42,293
United States |  |  |  |  |  |  |  |  |  |  |
Revenues by Product Line: |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 182,788 | 165,335 | 193,383
Capital Expenditures: |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | 32,852 |  |  |  | 18,482 |  |  |  | 32,852 | 18,482 | 17,373
China |  |  |  |  |  |  |  |  |  |  |
Revenues by Product Line: |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 63,910 | 43,299 | 50,814
Capital Expenditures: |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | 11,685 |  |  |  | 10,714 |  |  |  | 11,685 | 10,714 | 12,278
Canada |  |  |  |  |  |  |  |  |  |  |
Revenues by Product Line: |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 47,611 | 28,888 | 21,164
Capital Expenditures: |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | 9,449 |  |  |  | 1,125 |  |  |  | 9,449 | 1,125 | 1,312
Germany |  |  |  |  |  |  |  |  |  |  |
Revenues by Product Line: |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 32,026 | 18,095 | 9,686
Capital Expenditures: |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | 6,452 |  |  |  | 5,792 |  |  |  | 6,452 | 5,792 | 63
Other |  |  |  |  |  |  |  |  |  |  |
Revenues by Product Line: |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 188,698 | 158,509 | 115,060
Capital Expenditures: |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | 19,285 |  |  |  | 11,591 |  |  |  | 19,285 | 11,591 | 11,267
Operating Segments | Papermaking Systems Segment |  |  |  |  |  |  |  |  |  |  |
Revenues by Product Line: |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 407,605 | 366,461 | 342,661
Income from Continuing Operations Before Provision for Income Taxes: |  |  |  |  |  |  |  |  |  |  |
Total operating income (loss) |  |  |  |  |  |  |  |  | 72,600 | 57,427 | 56,789
Total Assets: |  |  |  |  |  |  |  |  |  |  |
Total Assets | 494,919 |  |  |  | 407,538 |  |  |  | 494,919 | 407,538 | 354,417
Depreciation and Amortization: |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 11,239 | 11,513 | 7,898
Capital Expenditures: |  |  |  |  |  |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 14,359 | 5,504 | 4,639
Operating Segments | Papermaking Systems Segment | Stock-Preparation |  |  |  |  |  |  |  |  |  |  |
Revenues by Product Line: |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 193,838 | 171,378 | 148,341
Operating Segments | Papermaking Systems Segment | Doctoring, Cleaning, & Filtration |  |  |  |  |  |  |  |  |  |  |
Revenues by Product Line: |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 109,631 | 105,938 | 101,523
Operating Segments | Papermaking Systems Segment | Fluid-Handling |  |  |  |  |  |  |  |  |  |  |
Revenues by Product Line: |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 104,136 | 89,145 | 92,797
Operating Segments | Wood Processing Systems |  |  |  |  |  |  |  |  |  |  |
Revenues by Product Line: |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 95,053 | 36,850 | 36,387
Income from Continuing Operations Before Provision for Income Taxes: |  |  |  |  |  |  |  |  |  |  |
Total operating income (loss) |  |  |  |  |  |  |  |  | 9,690 | 8,327 | 10,926
Total Assets: |  |  |  |  |  |  |  |  |  |  |
Total Assets | 257,467 |  |  |  | 52,407 |  |  |  | 257,467 | 52,407 | 53,347
Depreciation and Amortization: |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 7,515 | 2,188 | 2,384
Capital Expenditures: |  |  |  |  |  |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 2,333 | 29 | 198
Corporate and Fiber-based Products |  |  |  |  |  |  |  |  |  |  |
Income from Continuing Operations Before Provision for Income Taxes: |  |  |  |  |  |  |  |  |  |  |
Total operating income (loss) |  |  |  |  |  |  |  |  | (21,537) | (20,181) | (17,596)
Total Assets: |  |  |  |  |  |  |  |  |  |  |
Total Assets | $ 8,708 |  |  |  | $ 10,746 |  |  |  | 8,708 | 10,746 | 7,734
Depreciation and Amortization: |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 621 | 625 | 539
Capital Expenditures: |  |  |  |  |  |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 589 | 271 | 642
Corporate and Fiber-based Products | Fiber-based Products |  |  |  |  |  |  |  |  |  |  |
Revenues by Product Line: |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 12,375 | $ 10,815 | $ 11,059

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