Revenue - Summary of Disaggregated Net Sales (Detail) - USD ($) $ in Thousands	2 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Revenue from contract with customers		$ 166,380	$ 140,194	$ 544,279	$ 442,941
Products Transferred at a Point in Time and Variable Consideration Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers		146,998	131,043	491,399	433,790
Products Transferred Over Time and Fixed Price Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers		19,382	9,151	52,880	9,151
Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers		146,998	131,043	491,399	433,790
Residential [Member] | Products Transferred at a Point in Time and Variable Consideration Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers		146,998	131,043	491,399	433,790
Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers	$ 9,200	19,382	9,151	52,880	9,151
Commercial [Member] | Products Transferred Over Time and Fixed Price Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers		$ 19,382	$ 9,151	$ 52,880	$ 9,151