Nature of Operations and Summary of Significant Accounting Policies - Goodwill (Details) $ in Thousands	3 Months Ended
	Mar. 28, 2020 USD ($)
Goodwill [Roll Forward]
Gross Balance, Beginning Balance	$ 421,541
Accumulated impairment losses	(85,509)
Net Balance, Beginning Balance	336,032
Currency translation	(5,035)
Total 2020 adjustments	(5,035)
Gross Balance, Ending Balance	416,506
Accumulated impairment losses	(85,509)
Net Balance, Ending Balance	330,997
Operating Segment | Flow Control
Goodwill [Roll Forward]
Gross Balance, Beginning Balance	97,680
Accumulated impairment losses	0
Net Balance, Beginning Balance	97,680
Currency translation	(1,552)
Total 2020 adjustments	(1,552)
Gross Balance, Ending Balance	96,128
Accumulated impairment losses	0
Net Balance, Ending Balance	96,128
Operating Segment | Industrial Processing
Goodwill [Roll Forward]
Gross Balance, Beginning Balance	207,536
Accumulated impairment losses	(85,509)
Net Balance, Beginning Balance	122,027
Currency translation	(3,182)
Total 2020 adjustments	(3,182)
Gross Balance, Ending Balance	204,354
Accumulated impairment losses	(85,509)
Net Balance, Ending Balance	118,845
Operating Segment | Material Handling Systems
Goodwill [Roll Forward]
Gross Balance, Beginning Balance	116,325
Accumulated impairment losses	0
Net Balance, Beginning Balance	116,325
Currency translation	(301)
Total 2020 adjustments	(301)
Gross Balance, Ending Balance	116,024
Accumulated impairment losses	0
Net Balance, Ending Balance	$ 116,024