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Nature of Operations and Summary of Significant Accounting Policies - Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Goodwill [Roll Forward]
Gross Balance, Beginning Balance	$ 353,510	$ 236,964
Accumulated impairment losses	(85,509)	(85,509)
Net Balance, Beginning Balance	268,001	151,455
Increase Due to Acquisition	(92)	101,881
Currency translation	(9,735)	14,665
Goodwill period adjustments	(9,827)	116,546
Gross Balance, Ending Balance	343,683	353,510
Accumulated impairment losses	(85,509)	(85,509)
Net Balance, Ending Balance	258,174	268,001
Stock-Preparation
Goodwill [Roll Forward]
Net Balance, Beginning Balance	60,275
Net Balance, Ending Balance	58,142	60,275
Doctoring, Cleaning, & Filtration
Goodwill [Roll Forward]
Net Balance, Beginning Balance	35,941
Net Balance, Ending Balance	34,209	35,941
Fluid-Handling
Goodwill [Roll Forward]
Net Balance, Beginning Balance	65,289
Net Balance, Ending Balance	64,052	65,289
Operating Segments | Papermaking Systems
Goodwill [Roll Forward]
Gross Balance, Beginning Balance	247,014	219,699
Accumulated impairment losses	(85,509)	(85,509)
Net Balance, Beginning Balance	161,505	134,190
Increase Due to Acquisition	(17)	16,373
Currency translation	(5,085)	10,942
Goodwill period adjustments	(5,102)	27,315
Gross Balance, Ending Balance	241,912	247,014
Accumulated impairment losses	(85,509)	(85,509)
Net Balance, Ending Balance	156,403	161,505
Operating Segments | Wood Processing Systems
Goodwill [Roll Forward]
Gross Balance, Beginning Balance	106,496	17,265
Accumulated impairment losses	0	0
Net Balance, Beginning Balance	106,496	17,265
Increase Due to Acquisition	(75)	85,508
Currency translation	(4,650)	3,723
Goodwill period adjustments	(4,725)	89,231
Gross Balance, Ending Balance	101,771	106,496
Accumulated impairment losses	0	0
Net Balance, Ending Balance	$ 101,771	$ 106,496

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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.

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