Segment Information - Summary of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 26, 2021	Jun. 27, 2020	Jun. 26, 2021	Jun. 27, 2020	Dec. 26, 2020
Summary of segment information [Abstract]
Net sales	$ 1,012,592	$ 500,168	$ 1,830,740	$ 1,103,087
Cost of goods sold	799,712	403,159	1,468,130	911,874
Depreciation and amortization	11,134	11,097	22,889	22,136
Selling, general, and administrative expense	43,932	33,616	89,367	76,368
Asset impairments	0	0	0	3,035
Litigation settlement, net	0	0	0	(21,933)
Operating income	157,814	52,296	250,354	111,607
Interest expense	(1,866)	(4,973)	(6,335)	(10,352)
Redemption premium	(5,674)	0	(5,674)	0
Other income (expense), net	683	2,834	1,260	3,112
Income before income taxes	150,957	50,157	239,605	104,367
Assets	1,789,437		1,789,437		$ 1,528,568
Operating Segments [Member]
Summary of segment information [Abstract]
Net sales	1,023,364	508,766	1,846,990	1,118,253
Operating Segments [Member] | Piping Systems [Member]
Summary of segment information [Abstract]
Net sales	711,616	334,040	1,259,364	719,053
Cost of goods sold	558,278	272,271	1,008,632	591,435
Depreciation and amortization	5,515	5,456	11,725	11,155
Selling, general, and administrative expense	23,315	15,239	47,401	35,678
Asset impairments				3,035
Litigation settlement, net				0
Operating income	124,508	41,074	191,606	77,750
Assets	1,222,336		1,222,336		977,937
Operating Segments [Member] | Industrial Metals [Member]
Summary of segment information [Abstract]
Net sales	180,040	88,619	344,892	219,821
Cost of goods sold	155,399	75,274	296,290	190,071
Depreciation and amortization	1,694	1,995	3,437	3,997
Selling, general, and administrative expense	2,448	2,477	5,819	5,698
Asset impairments				0
Litigation settlement, net				0
Operating income	20,499	8,873	39,346	20,055
Assets	173,227		173,227		152,683
Operating Segments [Member] | Climate [Member]
Summary of segment information [Abstract]
Net sales	131,708	86,107	242,734	179,379
Cost of goods sold	96,303	64,540	180,385	135,633
Depreciation and amortization	2,753	2,757	5,382	5,223
Selling, general, and administrative expense	7,280	6,457	14,260	13,156
Asset impairments				0
Litigation settlement, net				0
Operating income	25,372	12,353	42,707	25,367
Assets	272,318		272,318		258,668
Corporate and Eliminations [Member]
Summary of segment information [Abstract]
Net sales	(10,772)	(8,598)	(16,250)	(15,166)
Cost of goods sold	(10,268)	(8,926)	(17,177)	(5,265)
Depreciation and amortization	1,172	889	2,345	1,761
Selling, general, and administrative expense	10,889	9,443	21,887	21,836
Asset impairments				0
Litigation settlement, net				(21,933)
Operating income	(12,565)	$ (10,004)	(23,305)	$ (11,565)
Assets	$ 121,556		$ 121,556		$ 139,280