Segment Information - Additional Information (Detail)	3 Months Ended								7 Months Ended	12 Months Ended
	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Jul. 31, 2017 Segment	Dec. 31, 2018 USD ($) Segment Retailer	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segment | Segment									1	2
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
Number of national retailers | Retailer										2
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