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Acquisitions - Additional Information (Details) $ in Thousands |  |  |  |  | 1 Months Ended | 3 Months Ended | 5 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 02, 2019 USD ($) | Oct. 30, 2017 USD ($) | Aug. 14, 2017 USD ($) | Jul. 05, 2017 USD ($) facility | Sep. 30, 2019 USD ($) | Dec. 28, 2019 USD ($) | Dec. 30, 2017 USD ($) | Dec. 30, 2017 USD ($) | Dec. 28, 2019 USD ($) | Dec. 29, 2018 USD ($) | Dec. 30, 2017 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payments to acquire businesses, net |  |  |  |  |  |  |  |  | $ 177,798 | $ 0 | $ 204,731
Goodwill |  |  |  |  |  | $ 336,032 | $ 268,001 | $ 268,001 | 336,032 | 258,174 | 268,001
Acquisition transaction costs |  |  |  |  |  |  |  |  | 843 | 1,321 | 5,375
Goodwill, period decrease |  |  |  |  |  |  |  |  | (77,858) | $ 9,827 |
Syntron Material Handling Group, LLC |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payments to acquire businesses, net | $ 176,855 |  |  |  |  |  |  |  |  |  |
Goodwill | 78,592 |  |  |  |  |  |  |  |  |  |
Goodwill, expected tax deductible amount | $ 59,195 |  |  |  |  |  |  |  |  |  |
Deferred income tax payments, period | 15 years |  |  |  |  |  |  |  |  |  |
Intangible assets other than goodwill acquired | $ 83,020 |  |  |  |  |  |  |  |  |  |
Intangible assets other than goodwill, expected tax deductible amount | $ 69,969 |  |  |  |  |  |  |  |  |  |
Acquired intangible assets other than goodwill income tax payments, period (years) | 15 years |  |  |  |  |  |  |  |  |  |
Revenue from the date of acquisition |  |  |  |  |  |  |  |  | 83,364 |  |
Operating income from date of acquisition |  |  |  |  |  |  |  |  | 3,132 |  |
Amortization expense |  |  |  |  |  |  |  |  | 4,872 |  |
Acquisition transaction costs |  |  |  |  |  |  |  |  | $ 843 |  |
Goodwill, period decrease |  |  |  |  |  | $ 1,704 |  |  |  |  |
Cash paid to seller borrowed under revolving credit facility | $ 179,286 |  |  |  |  |  |  |  |  |  |
Unaflex |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | $ 15,640 |  |  |  |  |  |  |  |
Intangible assets other than goodwill acquired |  |  | 11,200 |  |  |  |  |  |  |  |
Revenue from the date of acquisition |  |  |  |  |  |  | 7,335 |  |  |  |
Operating income from date of acquisition |  |  |  |  |  |  | 187 |  |  |  |
Amortization expense |  |  |  |  |  |  | $ 176 |  |  |  |
Acquisition transaction costs |  |  | 596 |  |  |  |  |  |  |  |
Cash paid to seller borrowed under revolving credit facility |  |  | $ 31,274 |  |  |  |  |  |  |  |
NII FPG |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payments to acquire businesses, net |  |  |  | $ 170,792 |  |  |  |  |  |  |
Goodwill |  |  |  | 85,432 |  |  |  |  |  |  |
Goodwill, expected tax deductible amount |  |  |  | 33,993 |  |  |  |  |  |  |
Intangible assets other than goodwill acquired |  |  |  | 72,812 |  |  |  |  |  |  |
Intangible assets other than goodwill, expected tax deductible amount |  |  |  | 10,044 |  |  |  |  |  |  |
Revenue from the date of acquisition |  |  |  |  |  |  |  | 48,363 |  |  |
Operating income from date of acquisition |  |  |  |  |  |  |  | 1,238 |  |  |
Amortization expense |  |  |  |  |  |  |  | $ 6,399 |  |  |
Acquisition transaction costs |  |  |  | 4,764 |  |  |  |  |  |  |
Cash paid to seller borrowed under revolving credit facility |  |  |  | $ 170,018 |  |  |  |  |  |  |
Number of primary manufacturing facilities | facility |  |  |  | 2 |  |  |  |  |  |  |
NII FPG | Revolving credit facility | Canadian Denominated Borrowing |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cash paid to seller borrowed under revolving credit facility |  |  |  | $ 62,690 |  |  |  |  |  |  |
NII FPG | Revolving credit facility | Euro-Denominated Borrowing |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cash paid to seller borrowed under revolving credit facility |  |  |  | $ 61,769 |  |  |  |  |  |  |
Other |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ 716 |  |  |  |  |  |  |  |  |
Cash paid to seller borrowed under revolving credit facility |  | $ 2,500 |  |  |  |  |  |  |  |  | $ 2,500
Papermaking Systems |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payments to acquire productive assets |  |  |  |  | $ 407 |  |  |  |  |  |

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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=116868678&loc=d3e1043-128460 + Details
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- Definition This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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