Goodwill and Other Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill (Details) - USD ($)	3 Months Ended	12 Months Ended
	Sep. 25, 2021	Dec. 25, 2021	Dec. 26, 2020	Dec. 28, 2019
Goodwill [Roll Forward]
Goodwill			$ 202,681,000
Accumulated impairment charges, beginning of year			(49,405,000)
Goodwill, net, beginning balance		$ 167,764,000	153,276,000
Additions		12,098,000	13,674,000
Reductions (1)		(6,366,000)
Impairment charges	$ (2,100,000)	(2,087,000)
Currency translation		(79,000)	814,000
Goodwill		222,822,000		$ 202,681,000
Accumulated impairment loss, end of year		(51,492,000)		(49,405,000)
Goodwill, net, ending balance		171,330,000	167,764,000	153,276,000
Impairment charges, excluding Turbotec		0	0	0
Piping Systems
Goodwill [Roll Forward]
Goodwill			172,175,000
Accumulated impairment charges, beginning of year			(40,552,000)
Goodwill, net, beginning balance		144,147,000	131,623,000
Additions		12,098,000	11,710,000
Reductions (1)		(4,402,000)
Impairment charges		0
Currency translation		(79,000)	814,000
Goodwill		192,316,000		172,175,000
Accumulated impairment loss, end of year		(40,552,000)		(40,552,000)
Goodwill, net, ending balance		151,764,000	144,147,000	131,623,000
Industrial Metals
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
Reductions (1)		0
Impairment charges		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
Goodwill [Roll Forward]
Goodwill			21,652,000
Accumulated impairment charges, beginning of year			0
Goodwill, net, beginning balance		23,616,000	21,652,000
Additions		0	1,964,000
Reductions (1)		(1,964,000)
Impairment charges		(2,087,000)
Currency translation		0	0
Goodwill		21,652,000		21,652,000
Accumulated impairment loss, end of year		(2,087,000)		0
Goodwill, net, ending balance		$ 19,565,000	$ 23,616,000	$ 21,652,000