Nature of Operations and Summary of Significant Accounting Policies - Goodwill (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jan. 03, 2015	Dec. 28, 2013
Goodwill [Roll Forward]
Gross Balance, Beginning Balance	$ 217,424us-gaap_GoodwillGross	$ 193,456us-gaap_GoodwillGross
Accumulated Impairment Losses, Beginning Balance	(85,509)	(85,509)
Net Balance, Beginning Balance	131,915us-gaap_Goodwill	107,947us-gaap_Goodwill
Increase due to acquisitions	4,182us-gaap_GoodwillAcquiredDuringPeriod	24,025us-gaap_GoodwillAcquiredDuringPeriod
Currency translation adjustment	(8,215)us-gaap_GoodwillTranslationAdjustments	(57)us-gaap_GoodwillTranslationAdjustments
Goodwill period adjustments	(4,033)us-gaap_GoodwillPeriodIncreaseDecrease	23,968us-gaap_GoodwillPeriodIncreaseDecrease
Gross Balance, Ending Balance	213,391us-gaap_GoodwillGross	217,424us-gaap_GoodwillGross
Accumulated Impairment Losses, Beginning Balance	(85,509)	(85,509)
Net Balance, Ending Balance	127,882us-gaap_Goodwill	131,915us-gaap_Goodwill
Papermaking systems segment
Goodwill [Roll Forward]
Gross Balance, Beginning Balance	196,339	193,456
Accumulated Impairment Losses, Beginning Balance	(85,509)	(85,509)
Net Balance, Beginning Balance	110,830	107,947
Increase due to acquisitions	3,288	2,545
Currency translation adjustment	(6,348)	338
Goodwill period adjustments	(3,060)	2,883
Gross Balance, Ending Balance	193,279	196,339
Accumulated Impairment Losses, Beginning Balance	(85,509)	(85,509)
Net Balance, Ending Balance	107,770	110,830
Stock-Preparation
Goodwill [Roll Forward]
Net Balance, Ending Balance	20,081	18,290
Doctoring, Cleaning, & Filtration
Goodwill [Roll Forward]
Net Balance, Ending Balance	38,381	34,658
Fluid-Handling
Goodwill [Roll Forward]
Net Balance, Ending Balance	49,308	57,882
Wood Processing Systems
Goodwill [Roll Forward]
Gross Balance, Beginning Balance	21,085	0
Accumulated Impairment Losses, Beginning Balance	0	0
Net Balance, Beginning Balance	21,085	0
Increase due to acquisitions	894	21,480
Currency translation adjustment	(1,867)	(395)
Goodwill period adjustments	(973)	21,085
Gross Balance, Ending Balance	20,112	21,085
Accumulated Impairment Losses, Beginning Balance	0	0
Net Balance, Ending Balance	$ 20,112	$ 21,085

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

-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

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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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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.

+ References

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,h)

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Amount of increase (decrease) from foreign currency translation adjustments 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

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-Section 50

-Paragraph 1

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