Segment Information - Summary of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Summary of segment information [Abstract]
Net sales	$ 818,148	$ 602,919
Cost of goods sold	668,418	508,715
Depreciation and amortization	11,755	11,039
Selling, general, and administrative expense	45,435	42,752
Asset impairments	0	3,035
Litigation settlement, net	0	(21,933)
Operating income	92,540	59,311
Interest expense	(4,469)	(5,379)
Other income (expense), net	577	278
Income before income taxes	88,648	54,210
Operating Segments [Member]
Summary of segment information [Abstract]
Net sales	823,626	609,487
Operating Segments [Member] | Piping Systems [Member]
Summary of segment information [Abstract]
Net sales	547,748	385,013
Cost of goods sold	450,354	319,164
Depreciation and amortization	6,210	5,699
Selling, general, and administrative expense	24,086	20,439
Asset impairments		3,035
Litigation settlement, net		0
Operating income	67,098	36,676
Operating Segments [Member] | Industrial Metals [Member]
Summary of segment information [Abstract]
Net sales	164,852	131,202
Cost of goods sold	140,891	114,797
Depreciation and amortization	1,743	2,002
Selling, general, and administrative expense	3,371	3,221
Asset impairments		0
Litigation settlement, net		0
Operating income	18,847	11,182
Operating Segments [Member] | Climate [Member]
Summary of segment information [Abstract]
Net sales	111,026	93,272
Cost of goods sold	84,082	71,093
Depreciation and amortization	2,629	2,466
Selling, general, and administrative expense	6,980	6,699
Asset impairments		0
Litigation settlement, net		0
Operating income	17,335	13,014
Corporate and Eliminations [Member]
Summary of segment information [Abstract]
Net sales	(5,478)	(6,568)
Cost of goods sold	(6,909)	3,661
Depreciation and amortization	1,173	872
Selling, general, and administrative expense	10,998	12,393
Asset impairments		0
Litigation settlement, net		(21,933)
Operating income	$ (10,740)	$ (1,561)