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Nature of Operations and Summary of Significant Accounting Policies - Goodwill (Details) $ in Thousands	6 Months Ended
	Jun. 27, 2020 USD ($)
Goodwill [Roll Forward]
Gross Balance, Beginning Balance	$ 421,541
Accumulated impairment losses	(85,509)
Net Balance, Beginning Balance	336,032
Acquisition (Note 2)	4,001
Currency translation	(2,040)
Total 2020 adjustments	1,961
Gross Balance, Ending Balance	423,502
Accumulated impairment losses	(85,509)
Net Balance, Ending Balance	337,993
Operating Segment | Flow Control
Goodwill [Roll Forward]
Gross Balance, Beginning Balance	97,680
Accumulated impairment losses	0
Net Balance, Beginning Balance	97,680
Acquisition (Note 2)	0
Currency translation	(673)
Total 2020 adjustments	(673)
Gross Balance, Ending Balance	97,007
Accumulated impairment losses	0
Net Balance, Ending Balance	97,007
Operating Segment | Industrial Processing
Goodwill [Roll Forward]
Gross Balance, Beginning Balance	207,536
Accumulated impairment losses	(85,509)
Net Balance, Beginning Balance	122,027
Acquisition (Note 2)	4,001
Currency translation	(1,614)
Total 2020 adjustments	2,387
Gross Balance, Ending Balance	209,923
Accumulated impairment losses	(85,509)
Net Balance, Ending Balance	124,414
Operating Segment | Material Handling Systems
Goodwill [Roll Forward]
Gross Balance, Beginning Balance	116,325
Accumulated impairment losses	0
Net Balance, Beginning Balance	116,325
Acquisition (Note 2)	0
Currency translation	247
Total 2020 adjustments	247
Gross Balance, Ending Balance	116,572
Accumulated impairment losses	0
Net Balance, Ending Balance	$ 116,572

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