Nature of Operations and Summary of Significant Accounting Policies - Goodwill (Details) $ in Thousands	6 Months Ended
Jul. 02, 2016 USD ($)
Goodwill [Roll Forward]
Gross Balance, Beginning Balance	$ 204,560
Accumulated impairment losses	(85,509)
Net Balance, Beginning Balance	119,051
Acquisition	38,344
Currency Translation	78
Total 2016 Adjustments	38,422
Gross Balance, Ending Balance	242,982
Accumulated impairment losses	(85,509)
Net Balance, Ending Balance	157,473
Papermaking Systems [Member] \| Operating Segment [Member]
Goodwill [Roll Forward]
Gross Balance, Beginning Balance	187,720
Accumulated impairment losses	(85,509)
Net Balance, Beginning Balance	102,211
Acquisition	38,344
Currency Translation	(1,109)
Total 2016 Adjustments	37,235
Gross Balance, Ending Balance	224,955
Accumulated impairment losses	(85,509)
Net Balance, Ending Balance	139,446
Wood Processing Systems [Member] \| Operating Segment [Member]
Goodwill [Roll Forward]
Gross Balance, Beginning Balance	16,840
Accumulated impairment losses	0
Net Balance, Beginning Balance	16,840
Acquisition	0
Currency Translation	1,187
Total 2016 Adjustments	1,187
Gross Balance, Ending Balance	18,027
Accumulated impairment losses	0
Net Balance, Ending Balance	$ 18,027

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

Amount before 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

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- Definition

Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

Amount of increase (decrease) 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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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