Goodwill and Other Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 27, 2025	Dec. 27, 2025	Dec. 28, 2024
Goodwill [Roll Forward]
Goodwill			$ 203,312
Accumulated impairment charges, beginning of year			(51,492)
Goodwill, net, beginning balance		$ 311,165	151,820
Additions			161,244
Reductions		(14,449)
Currency translation		1,472	(1,899)
Goodwill	$ 349,680	349,680
Accumulated impairment charges, end of year	(51,492)	(51,492)
Goodwill, net, ending balance	298,188	298,188	311,165
Goodwill, impairment loss	0
Elkhart
Goodwill [Roll Forward]
Purchase price allocation		14,400
Piping Systems
Goodwill [Roll Forward]
Goodwill			172,806
Accumulated impairment charges, beginning of year			(40,552)
Goodwill, net, beginning balance		145,462	132,254
Additions			15,107
Reductions		(14,449)
Currency translation		1,472	(1,899)
Goodwill	173,037	173,037
Accumulated impairment charges, end of year	(40,552)	(40,552)
Goodwill, net, ending balance	132,485	132,485	145,462
Industrial Metals
Goodwill [Roll Forward]
Goodwill			8,854
Accumulated impairment charges, beginning of year			(8,853)
Goodwill, net, beginning balance		146,138	1
Additions			146,137
Reductions		0
Currency translation		0	0
Goodwill	154,991	154,991
Accumulated impairment charges, end of year	(8,853)	(8,853)
Goodwill, net, ending balance	146,138	146,138	146,138
Climate
Goodwill [Roll Forward]
Goodwill			21,652
Accumulated impairment charges, beginning of year			(2,087)
Goodwill, net, beginning balance		19,565	19,565
Additions			0
Reductions		0
Currency translation		0	0
Goodwill	21,652	21,652
Accumulated impairment charges, end of year	(2,087)	(2,087)
Goodwill, net, ending balance	$ 19,565	$ 19,565	$ 19,565