Acquisition - Acquisition of Syntron Material Handling Group, LLC (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended	9 Months Ended
	Jan. 02, 2019	Sep. 28, 2019	Dec. 28, 2019	Sep. 28, 2019	Sep. 29, 2018	Dec. 29, 2018
Business Acquisition [Line Items]
Payments to acquire business, net of cash acquired				$ 177,058	$ 0
Goodwill		$ 334,491		334,491		$ 258,174
Syntron Material Handling Group, LLC
Business Acquisition [Line Items]
Payments to acquire business, net of cash acquired	$ 176,855
Goodwill	80,296
Goodwill, expected to be tax deductible	$ 58,450
Deferred income tax payments, period (years)	15 years
Intangible assets other than goodwill acquired	$ 83,020
Intangible assets other than goodwill, expected tax deductible amount	$ 70,925
Acquired intangible assets other than goodwill income tax payments, period (years)	15 years
Revenues from the date of acquisition				61,063
Operating income from the date of acquisition				877
Amortization expense				4,852
Acquisition transaction costs				$ 843
Papermaking Systems
Business Acquisition [Line Items]
Cash payments to acquire productive assets		$ 203
Forecast | Papermaking Systems
Business Acquisition [Line Items]
Cash payments to acquire productive assets			$ 407