Nature of Operations and Summary of Significant Accounting Policies - Goodwill (Details) $ in Thousands	9 Months Ended
Oct. 01, 2016 USD ($)
Goodwill [Roll Forward]
Gross Balance, Beginning Balance	$ 204,560
Accumulated impairment losses	(85,509)
Net Balance, Beginning Balance	119,051
Acquisition (Note 2)	38,561
Currency Translation	107
Total 2016 Adjustments	38,668
Gross Balance, Ending Balance	243,228
Accumulated impairment losses	(85,509)
Net Balance, Ending Balance	157,719
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 (Note 2)	38,561
Currency Translation	(893)
Total 2016 Adjustments	37,668
Gross Balance, Ending Balance	225,388
Accumulated impairment losses	(85,509)
Net Balance, Ending Balance	139,879
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 (Note 2)	0
Currency Translation	1,000
Total 2016 Adjustments	1,000
Gross Balance, Ending Balance	17,840
Accumulated impairment losses	0
Net Balance, Ending Balance	$ 17,840

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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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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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.

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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.

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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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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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