Goodwill and Other Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Goodwill [Roll Forward]
Goodwill		$ 199,740,000
Accumulated impairment charges, beginning of year		(49,405,000)
Goodwill, net, beginning balance	$ 153,276,000	150,335,000
Additions	13,674,000	1,999,000
Reduction		(534,000)
Currency translation	814,000	1,476,000
Goodwill	217,169,000		$ 199,740,000
Accumulated impairment loss, end of year	(49,405,000)		(49,405,000)
Goodwill, net, ending balance	167,764,000	153,276,000	150,335,000
Impairment charges	0	0	0
Die-Mold [Member]
Goodwill [Roll Forward]
Purchase price allocation adjustments		2,000,000.0
ATCO Rubber Product [Member]
Goodwill [Roll Forward]
Purchase price allocation adjustments		500,000
Piping Systems [Member]
Goodwill [Roll Forward]
Goodwill		168,700,000
Accumulated impairment charges, beginning of year		(40,552,000)
Goodwill, net, beginning balance	131,623,000	128,148,000
Additions	11,710,000	1,999,000
Reduction		0
Currency translation	814,000	1,476,000
Goodwill	184,699,000		168,700,000
Accumulated impairment loss, end of year	(40,552,000)		(40,552,000)
Goodwill, net, ending balance	144,147,000	131,623,000	128,148,000
Industrial Metals [Member]
Goodwill [Roll Forward]
Goodwill		8,854,000
Accumulated impairment charges, beginning of year		(8,853,000)
Goodwill, net, beginning balance	1,000	1,000
Additions	0	0
Reduction		0
Currency translation	0	0
Goodwill	8,854,000		8,854,000
Accumulated impairment loss, end of year	(8,853,000)		(8,853,000)
Goodwill, net, ending balance	1,000	1,000	1,000
Climate [Member]
Goodwill [Roll Forward]
Goodwill		22,186,000
Accumulated impairment charges, beginning of year		0
Goodwill, net, beginning balance	21,652,000	22,186,000
Additions	1,964,000	0
Reduction		(534,000)
Currency translation	0	0
Goodwill	23,616,000		22,186,000
Accumulated impairment loss, end of year	0		0
Goodwill, net, ending balance	$ 23,616,000	$ 21,652,000	$ 22,186,000