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Business Segment Information - Summary of Segment Information (Details) | 3 Months Ended | 9 Months Ended
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Sep. 29, 2018 USD ($) | Sep. 30, 2017 USD ($) | Sep. 29, 2018 USD ($) Segment | Sep. 30, 2017 USD ($)
Segment Reporting [Abstract] |  |  |  |
Number of reportable segments | Segment |  |  | 2 |
Revenues: |  |  |  |
Revenues | $ 165,745,000 | $ 152,794,000 | $ 469,851,000 | $ 365,893,000
Income Before Provision for Income Taxes: |  |  |  |
Total operating income (loss) | 27,375,000 | 19,674,000 | 63,774,000 | 43,584,000
Interest expense, net | (1,708,000) | (1,188,000) | (4,985,000) | (1,722,000)
Other expense, net | (245,000) | (216,000) | (736,000) | (637,000)
Income Before Provision for Income Taxes | 25,422,000 | 18,270,000 | 58,053,000 | 41,225,000
Capital Expenditures: |  |  |  |
Capital expenditures | 2,606,000 | 5,283,000 | 12,817,000 | 8,718,000
Restructuring costs | 378,000 | 0 | 1,717,000 | 0
Operating Segment [Member] | Papermaking Systems [Member] |  |  |  |
Revenues: |  |  |  |
Revenues | 126,770,000 | 111,135,000 | 350,811,000 | 295,416,000
Income Before Provision for Income Taxes: |  |  |  |
Total operating income (loss) | 25,919,000 | 21,684,000 | 61,402,000 | 53,247,000
Capital Expenditures: |  |  |  |
Capital expenditures | 1,348,000 | 3,790,000 | 9,837,000 | 6,567,000
Restructuring costs | 378,000 |  | 1,717,000 |
Acquisition transaction costs and amortization of acquired profit in inventory |  | 278,000 |  | 593,000
Operating Segment [Member] | Papermaking Systems [Member] | 2017 Acquisitions [Member] |  |  |  |
Revenues: |  |  |  |
Revenues | 917,000 |  | 12,247,000 |
Operating Segment [Member] | Wood Processing Systems [Member] |  |  |  |
Revenues: |  |  |  |
Revenues | 37,042,000 | 39,714,000 | 109,335,000 | 61,050,000
Income Before Provision for Income Taxes: |  |  |  |
Total operating income (loss) | 8,704,000 | 4,418,000 | 21,380,000 | 6,511,000
Capital Expenditures: |  |  |  |
Capital expenditures | 1,026,000 | 1,358,000 | 2,586,000 | 1,649,000
Acquisition transaction costs and amortization of acquired profit in inventory |  | 4,625,000 | 252,000 | 8,727,000
Operating Segment [Member] | Wood Processing Systems [Member] | 2017 Acquisitions [Member] |  |  |  |
Revenues: |  |  |  |
Revenues |  |  | 52,310,000 |
Corporate and Fiber-based Products [Member] |  |  |  |
Income Before Provision for Income Taxes: |  |  |  |
Total operating income (loss) | (7,248,000) | (6,428,000) | (19,008,000) | (16,174,000)
Capital Expenditures: |  |  |  |
Capital expenditures | 232,000 | 135,000 | 394,000 | 502,000
Corporate and Fiber-based Products [Member] | Fiber based Products [Member] |  |  |  |
Revenues: |  |  |  |
Revenues | $ 1,933,000 | $ 1,945,000 | $ 9,705,000 | $ 9,427,000

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460 + Details
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- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(10)) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(8)) -URI http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(15)) -URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260 + Details
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