Revenue From Contracts With Customers - Summary of Disaggregated Net Sales (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue from contract with customers	$ 206,453	$ 206,692	$ 386,024	$ 377,899
Products Transferred at a Point in Time and Variable Consideration Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers	193,468	189,201	358,947	344,401
Products Transferred Over Time and Fixed Price Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers	12,985	17,491	27,077	33,498
Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers	193,468	189,201	358,947	344,401
Residential [Member] | Products Transferred at a Point in Time and Variable Consideration Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers	193,468	189,201	358,947	344,401
Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers	12,985	17,491	27,077	33,498
Commercial [Member] | Products Transferred Over Time and Fixed Price Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers	$ 12,985	$ 17,491	$ 27,077	$ 33,498