Segment Information - Summary of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 25, 2021	Jun. 26, 2021	Sep. 26, 2020	Sep. 25, 2021	Sep. 26, 2020	Dec. 26, 2020
Summary of segment information [Abstract]
Net sales	$ 982,248		$ 619,105	$ 2,812,988	$ 1,722,192
Cost of goods sold	744,265		500,780	2,212,395	1,412,654
Depreciation and amortization	10,868		10,752	33,757	32,888
Selling, general, and administrative expense	48,524		38,346	137,891	117,749
Gain on sale of businesses	(54,759)		0	(54,759)	0
Litigation settlement, net	0		0	0	(21,933)
Operating income	233,350		69,227	483,704	180,834
Interest expense	(1,116)		(4,885)	(7,451)	(15,237)
Redemption premium	0	$ (5,700)	0	(5,674)	0
Other income (expense), net	(2,548)		522	(1,288)	3,634
Income before income taxes	229,686		64,864	469,291	169,231
Assets	1,728,537			1,728,537		$ 1,528,568
Operating Segments
Summary of segment information [Abstract]
Net sales	992,697		625,849	2,839,687	1,744,102
Operating Segments | Piping Systems
Summary of segment information [Abstract]
Net sales	688,200		409,414	1,947,564	1,128,467
Cost of goods sold	506,703		339,904	1,515,335	931,339
Depreciation and amortization	5,547		5,362	17,272	16,517
Selling, general, and administrative expense	23,751		19,285	71,152	57,998
Gain on sale of businesses	0			0
Litigation settlement, net					0
Operating income	152,199		44,863	343,805	122,613
Assets	1,142,523			1,142,523		977,937
Operating Segments | Industrial Metals
Summary of segment information [Abstract]
Net sales	182,245		118,831	527,137	338,652
Cost of goods sold	158,822		95,717	455,112	285,788
Depreciation and amortization	1,661		1,774	5,098	5,771
Selling, general, and administrative expense	2,710		2,992	8,529	8,690
Gain on sale of businesses	0			0
Litigation settlement, net					0
Operating income	19,052		18,348	58,398	38,403
Assets	186,040			186,040		152,683
Operating Segments | Climate
Summary of segment information [Abstract]
Net sales	122,252		97,604	364,986	276,983
Cost of goods sold	89,175		70,450	269,560	206,083
Depreciation and amortization	2,484		2,547	7,866	7,770
Selling, general, and administrative expense	9,521		6,451	23,781	19,607
Gain on sale of businesses	0			0
Litigation settlement, net					0
Operating income	21,072		18,156	63,779	43,523
Assets	244,603			244,603		258,668
Corporate and Eliminations
Summary of segment information [Abstract]
Net sales	(10,449)		(6,744)	(26,699)	(21,910)
Cost of goods sold	(10,435)		(5,291)	(27,612)	(10,556)
Depreciation and amortization	1,176		1,069	3,521	2,830
Selling, general, and administrative expense	12,542		9,618	34,429	31,454
Gain on sale of businesses	(54,759)			(54,759)
Litigation settlement, net					(21,933)
Operating income	41,027		$ (12,140)	17,722	$ (23,705)
Assets	$ 155,371			$ 155,371		$ 139,280