Segment Information - Details of Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net sales	$ 335,872			$ 231,502			$ 892,991	$ 652,545
Net income	73,795	$ 61,366	$ 48,545	42,710	$ 47,218	$ 42,402	183,705	132,331
Depreciation and amortization							25,604	12,450
Income tax expense	24,311			14,435			61,235	43,938
Total assets	953,451						953,451		$ 770,492
Residential [Member]
Segment Reporting Information [Line Items]
Net sales	319,207			218,435			850,909	614,187
Commercial [Member]
Segment Reporting Information [Line Items]
Net sales	16,665			13,067			42,082	38,358
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	335,872			231,502			892,991	652,545
Net income	73,795			42,710			183,705	132,331
EBITDA	107,997			61,472			270,544	187,918
Depreciation and amortization	9,901			4,535			25,604	12,450
Income tax expense	24,311			14,435			61,235	43,938
Capital expenditures	29,620			37,084			124,451	99,696
Total assets	953,451			718,235			953,451	718,235
Operating Segments [Member] | Residential [Member]
Segment Reporting Information [Line Items]
Net sales	319,207			218,435			850,909	614,187
Net income	72,603			42,225			182,437	129,157
EBITDA	106,135			60,619			268,107	183,064
Depreciation and amortization	9,643			4,326			24,873	11,855
Income tax expense	23,899			14,276			60,797	42,853
Capital expenditures	29,554			36,887			122,631	98,913
Total assets	858,330			624,904			858,330	624,904
Operating Segments [Member] | Commercial [Member]
Segment Reporting Information [Line Items]
Net sales	16,665			13,067			42,082	38,358
Net income	1,192			485			1,268	3,174
EBITDA	1,862			853			2,437	4,854
Depreciation and amortization	258			209			731	595
Income tax expense	412			159			438	1,085
Capital expenditures	66			197			1,820	783
Total assets	$ 95,121			$ 93,331			$ 95,121	$ 93,331