Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2021

Revenue from Contract with Customer [Abstract]

Summary of Revenues Disaggregated by End Market and Product

The following tables present our revenues disaggregated by end market and product (in thousands):

	Three months ended March 31,
	2021				2020
Residential new construction	$	326,858	75	%	$	298,340	75	%
Repair and remodel	33,563		8	%	24,043		6	%
Commercial	76,645		17	%	74,948		19	%
Net revenues	$	437,066	100	%	$	397,331	100	%

	Three months ended March 31,
	2021				2020
Insulation	$	283,456	65	%	$	259,701	65	%
Waterproofing	29,949		7	%	28,505		7	%
Shower doors, shelving and mirrors	31,433		7	%	27,015		7	%
Garage doors	24,439		5	%	22,987		6	%
Rain gutters	19,003		4	%	11,576		3	%
Fireproofing/firestopping(1)	12,435		3	%	11,741		3	%
Window blinds	11,534		3	%	10,931		3	%
Other building products	24,817		6	%	24,875		6	%
Net revenues	$	437,066	100	%	$	397,331	100	%

(1)Combined with "Other building products" in previous years but shown separately to conform with updated disclosures.

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):

	March 31, 2021		December 31, 2020
Contract assets	$	27,641	$	24,334
Contract liabilities	(9,724)		(8,965)

Schedule of Cost and Estimated Earnings on Uncompleted Contracts

Uncompleted contracts were as follows (in thousands):

	March 31, 2021		December 31, 2020
Costs incurred on uncompleted contracts	$	182,748	$	169,544
Estimated earnings	94,802		90,737
Total	277,550		260,281
Less: Billings to date	254,840		240,665
Net under billings	$	22,710	$	19,616

Schedule of Net Under Billings

Net under billings were as follows (in thousands):

	March 31, 2021		December 31, 2020
Costs and estimated earnings in excess of billings on uncompleted contracts (contract assets)	$	27,641	$	24,334
Billings in excess of costs and estimated earnings on uncompleted contracts (contract liabilities)	(4,931)		(4,718)
Net under billings	$	22,710	$	19,616