Segment Information - Details of Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net sales	$ 140,194	$ 106,168	$ 442,941	$ 384,294
Net income (loss)	20,098	7,787	76,829	55,217
Depreciation and amortization			12,065	10,893
Income tax expense	10,208	$ 2,702	39,715	$ 27,871
Total assets	311,196		311,196		$ 221,430
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	140,194		442,941
Net income (loss)	20,098		76,829
EBITDA	34,885		129,027
Depreciation and amortization	4,520		11,968
Income tax expense	10,208		39,715
Capital expenditures	3,983		11,108
Total assets	311,196		311,196
Operating Segments [Member] | Residential [Member]
Segment Reporting Information [Line Items]
Net sales	131,043		433,790
Net income (loss)	20,173		76,904
EBITDA	34,079		128,221
Depreciation and amortization	3,639		11,087
Income tax expense	10,208		39,715
Capital expenditures	3,943		11,068
Total assets	232,663		232,663
Operating Segments [Member] | Commercial [Member]
Segment Reporting Information [Line Items]
Net sales	9,151		9,151
Net income (loss)	(75)		(75)
EBITDA	806		806
Depreciation and amortization	881		881
Capital expenditures	40		40
Total assets	$ 78,533		$ 78,533