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Nature of Operations and Summary of Significant Accounting Policies - Goodwill (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 28, 2019
Dec. 29, 2018
Goodwill [Roll Forward]    
Gross Balance, Beginning Balance $ 343,683 $ 353,510
Accumulated impairment losses (85,509) (85,509)
Net Balance, Beginning Balance 258,174 268,001
Increase Due to Acquisition 78,592 (92)
Currency translation (734) (9,735)
Goodwill period adjustments 77,858 (9,827)
Gross Balance, Ending Balance 421,541 343,683
Accumulated impairment losses (85,509) (85,509)
Net Balance, Ending Balance 336,032 258,174
Stock-Preparation    
Goodwill [Roll Forward]    
Net Balance, Beginning Balance 58,142  
Net Balance, Ending Balance 57,132 58,142
Fluid-Handling    
Goodwill [Roll Forward]    
Net Balance, Beginning Balance 64,052  
Net Balance, Ending Balance 63,382 64,052
Doctoring, Cleaning, & Filtration    
Goodwill [Roll Forward]    
Net Balance, Beginning Balance 34,209  
Net Balance, Ending Balance 34,297 34,209
Operating Segments | Papermaking Systems    
Goodwill [Roll Forward]    
Gross Balance, Beginning Balance 241,912 247,014
Accumulated impairment losses (85,509) (85,509)
Net Balance, Beginning Balance 156,403 161,505
Increase Due to Acquisition 0 (17)
Currency translation (1,592) (5,085)
Goodwill period adjustments (1,592) (5,102)
Gross Balance, Ending Balance 240,320 241,912
Accumulated impairment losses (85,509) (85,509)
Net Balance, Ending Balance 154,811 156,403
Operating Segments | Wood Processing Systems    
Goodwill [Roll Forward]    
Gross Balance, Beginning Balance 101,771 106,496
Accumulated impairment losses 0 0
Net Balance, Beginning Balance 101,771 106,496
Increase Due to Acquisition 0 (75)
Currency translation 858 (4,650)
Goodwill period adjustments 858 (4,725)
Gross Balance, Ending Balance 102,629 101,771
Accumulated impairment losses 0 0
Net Balance, Ending Balance 102,629 101,771
Operating Segments | Material Handling System    
Goodwill [Roll Forward]    
Gross Balance, Beginning Balance 0 0
Accumulated impairment losses 0 0
Net Balance, Beginning Balance 0 0
Increase Due to Acquisition 78,592 0
Currency translation 0 0
Goodwill period adjustments 78,592 0
Gross Balance, Ending Balance 78,592 0
Accumulated impairment losses 0 0
Net Balance, Ending Balance $ 78,592 $ 0