Segment Information - Details of Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net Sales	$ 164,772	$ 194,551	$ 206,453	$ 179,571	$ 139,971	$ 166,380	$ 206,692	$ 171,207	$ 745,347	$ 684,250	$ 565,153
Net Income (Loss)	35,497	$ 41,976	$ 35,710	$ 31,555	25,171	$ 29,471	$ 42,820	$ 37,110	144,738	134,572	95,128
Depreciation and amortization									14,031	16,597	16,860
Income Tax Expense (Benefit)									44,964	42,289	46,791
Total Assets	592,239				465,122				592,239	465,122
Residential [Member]
Segment Reporting Information [Line Items]
Net Sales									694,267	613,229	543,346
Commercial [Member]
Segment Reporting Information [Line Items]
Net Sales									51,080	71,021	21,807
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales									745,347	684,250	565,153
Net Income (Loss)									144,738	134,572	95,128
EBITDA									202,230	193,136	159,110
Depreciation and amortization									14,031	16,467	16,730
Income Tax Expense (Benefit)									44,964	42,289	46,791
Capital Expenditures									67,265	33,816	15,040
Total Assets	592,239				465,122				592,239	465,122	326,227
Operating Segments [Member] | Residential [Member]
Segment Reporting Information [Line Items]
Net Sales									694,267	613,229	543,346
Net Income (Loss)									142,811	131,823	97,412
EBITDA									199,020	186,268	160,382
Depreciation and amortization									13,413	13,216	14,598
Income Tax Expense (Benefit)									44,292	41,421	47,911
Capital Expenditures									65,399	31,392	14,989
Total Assets	503,883				380,682				503,883	380,682	247,817
Operating Segments [Member] | Commercial [Member]
Segment Reporting Information [Line Items]
Net Sales									51,080	71,021	21,807
Net Income (Loss)									1,927	2,749	(2,284)
EBITDA									3,210	6,868	(1,272)
Depreciation and amortization									618	3,251	2,132
Income Tax Expense (Benefit)									672	868	(1,120)
Capital Expenditures									1,866	2,424	51
Total Assets	$ 88,356				$ 84,440				$ 88,356	$ 84,440	$ 78,410