Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Summary of Revenues Disaggregated by End Market and Product

	Three months ended June 30,								Six months ended June 30,
	2021				2020				2021				2020
Residential new construction	$	373,883	77	%	$	298,321	76	%	$	705,069	76	%	$	596,661	75	%
Repair and remodel	30,776		6	%	23,034		6	%	59,636		7	%	47,077		6	%
Commercial	83,439		17	%	72,584		18	%	160,459		17	%	147,532		19	%
Net revenues	$	488,098	100	%	$	393,939	100	%	$	925,164	100	%	$	791,270	100	%

	Three months ended June 30,								Six months ended June 30,
	2021				2020				2021				2020
Insulation	$	313,365	64	%	$	251,052	64	%	$	596,820	65	%	$	510,753	64	%
Waterproofing	34,264		7	%	28,078		7	%	64,213		7	%	56,583		7	%
Shower doors, shelving and mirrors	34,986		7	%	28,902		7	%	66,419		7	%	55,917		7	%
Garage doors	26,044		5	%	21,667		6	%	50,483		5	%	44,654		6	%
Rain gutters	21,460		4	%	13,071		3	%	40,464		4	%	24,647		3	%
Fireproofing/firestopping(1)	13,036		3	%	13,537		3	%	25,472		3	%	25,279		3	%
Window blinds	12,667		3	%	11,554		3	%	24,201		3	%	22,485		3	%
Other building products	32,276		7	%	26,078		7	%	57,092		6	%	50,952		7	%
Net revenues	$	488,098	100	%	$	393,939	100	%	$	925,164	100	%	$	791,270	100	%

(1)Combined with "Other building products" in previous years.

Summary of Assets and Liabilities Related to Uncompleted Contracts and Customer Deposits

Contract assets and liabilities related to our uncompleted contracts and customer deposits were as follows (in thousands):

	June 30, 2021		December 31, 2020
Contract assets	$	28,370	$	24,334
Contract liabilities	(10,305)		(8,965)

Schedule of Cost and Estimated Earnings on Uncompleted Contracts

Uncompleted contracts were as follows (in thousands):

	June 30, 2021		December 31, 2020
Costs incurred on uncompleted contracts	$	216,067	$	169,544
Estimated earnings	107,440		90,737
Total	323,507		260,281
Less: Billings to date	299,878		240,665
Net under billings	$	23,629	$	19,616

Schedule of Net Under Billings

Net under billings were as follows (in thousands):

	June 30, 2021		December 31, 2020
Costs and estimated earnings in excess of billings on uncompleted contracts (contract assets)	$	28,370	$	24,334
Billings in excess of costs and estimated earnings on uncompleted contracts (contract liabilities)	(4,741)		(4,718)
Net under billings	$	23,629	$	19,616