Revenue From Contracts With Customers - Summary of Disaggregated Net Sales (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue from contract with customers	$ 231,502	$ 194,551	$ 652,545	$ 580,575
Products Transferred at a Point in Time and Variable Consideration Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers	218,435	182,775	614,187	541,722
Products Transferred Over Time and Fixed Price Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers	13,067	11,776	38,358	38,853
Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers	218,435	182,775	614,187	541,722
Residential [Member] | Products Transferred at a Point in Time and Variable Consideration Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers	218,435	182,775	614,187	541,722
Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers	13,067	11,776	38,358	38,853
Commercial [Member] | Products Transferred Over Time and Fixed Price Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers	$ 13,067	$ 11,776	$ 38,358	$ 38,853