Segment Information - Details of Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net sales	$ 311,596		$ 220,648		$ 557,120	$ 421,043
Net income	61,366	$ 48,545	47,218	$ 42,402	109,910	89,620
Depreciation and amortization					15,702	7,915
Income tax expense	20,978		16,249		36,925	29,504
Total assets	898,820				898,820		$ 770,492
Residential [Member]
Segment Reporting Information [Line Items]
Net sales	298,632		208,777		531,702	395,751
Commercial [Member]
Segment Reporting Information [Line Items]
Net sales	12,964		11,771		25,418	25,292
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	311,596		220,648		557,120	421,043
Net income	61,366		47,218		109,910	89,620
EBITDA	91,635		67,459		162,548	126,446
Depreciation and amortization	9,278		4,063		15,703	7,915
Income tax expense	20,978		16,249		36,925	29,504
Capital expenditures	36,738		39,880		94,831	62,613
Total assets	898,820		670,990		898,820	670,990
Operating Segments [Member] | Residential [Member]
Segment Reporting Information [Line Items]
Net sales	298,632		208,877		531,702	395,751
Net income	61,089		45,912		109,833	86,932
EBITDA	91,008		65,495		161,973	122,445
Depreciation and amortization	9,020		3,865		15,231	7,529
Income tax expense	20,886		15,789		36,899	28,577
Capital expenditures	36,514		39,610		93,077	62,026
Total assets	807,713		577,684		807,713	577,684
Operating Segments [Member] | Commercial [Member]
Segment Reporting Information [Line Items]
Net sales	12,964		11,771		25,418	25,292
Net income	277		1,306		77	2,688
EBITDA	627		1,964		575	4,001
Depreciation and amortization	258		198		472	386
Income tax expense	92		460		26	927
Capital expenditures	224		270		1,754	587
Total assets	$ 91,107		$ 93,306		$ 91,107	$ 93,306