Segment Information - Details of Segment Information (Detail) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net sales	$ 139,971,000	$ 166,380,000	$ 206,692,000	$ 171,207,000	$ 122,212,000	$ 140,194,000	$ 157,941,000	$ 144,806,000	$ 684,250,000	$ 565,153,000	$ 479,616,000
Net income (loss)	25,171,000	$ 29,471,000	$ 42,820,000	$ 37,110,000	18,299,000	$ 20,098,000	$ 28,782,000	$ 27,949,000	134,572,000	95,128,000	67,847,000
Depreciation and amortization									16,597,000	16,860,000	14,498,000
Income tax expense (benefit)									42,289,000	46,791,000	34,983,000
Total assets	465,122,000				326,227,000				465,122,000	326,227,000
Residential [Member]
Segment Reporting Information [Line Items]
Net sales									613,229,000	543,346,000	$ 479,600
Commercial [Member]
Segment Reporting Information [Line Items]
Net sales									71,021,000	21,807,000
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales									684,250,000	565,153,000
Net income (loss)									134,572,000	95,128,000
EBITDA									193,136,000	159,110,000
Depreciation and amortization									16,467,000	16,730,000
Income tax expense (benefit)									42,289,000	46,791,000
Capital expenditures									33,816,000	15,040,000
Total assets	465,122,000				326,227,000				465,122,000	326,227,000
Operating Segments [Member] | Residential [Member]
Segment Reporting Information [Line Items]
Net sales									613,229,000	543,346,000
Net income (loss)									131,823,000	97,412,000
EBITDA									186,268,000	160,382,000
Depreciation and amortization									13,216,000	14,598,000
Income tax expense (benefit)									41,421,000	47,911,000
Capital expenditures									31,392,000	14,989,000
Total assets	380,682,000				247,817,000				380,682,000	247,817,000
Operating Segments [Member] | Commercial [Member]
Segment Reporting Information [Line Items]
Net sales									71,021,000	21,807,000
Net income (loss)									2,749,000	(2,284,000)
EBITDA									6,868,000	(1,272,000)
Depreciation and amortization									3,251,000	2,132,000
Income tax expense (benefit)									868,000	(1,120,000)
Capital expenditures									2,424,000	51,000
Total assets	$ 84,440,000				$ 78,410,000				$ 84,440,000	$ 78,410,000