Revenue (Tables)

6 Months Ended

Jun. 30, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of revenue

The following table shows net sales classified by major product category for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended June 30,				Six Months Ended June 30,
(in thousands)	2020		2019		2020		2019
Millwork, doors & windows	$	287,999	$	271,135	$	583,668	$	511,057
Structural components	164,535		166,955		324,879		308,231
Lumber & lumber sheet goods	292,817		281,855		551,956		523,814
Other building products & services	234,545		226,430		440,272		428,678
Total net sales	$	979,896	$	946,375	$	1,900,775	$	1,771,780

The following table reflects the Company’s estimate of net sales by each customer type for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended June 30,				Six Months Ended June 30,
(in thousands)	2020		2019		2020		2019
Single-family homebuilders	$	702,388	$	716,974	$	1,377,159	$	1,345,692
Remodeling contractors	127,699		110,313		232,368		198,521
Multi-family, commercial & other contractors	149,809		119,088		291,248		227,567
Total net sales	$	979,896	$	946,375	$	1,900,775	$	1,771,780

Contract balances

The following table reflects the Company’s contract balances as of June 30, 2020 and December 31, 2019:

(in thousands)	June 30, 2020		December 31, 2019		Change
Receivables, including unbilled receivables presented in prepaid expenses and other current assets	$	375,822	$	333,044	$	42,778
Contract assets	33,871		32,125		1,746
Contract liabilities	$	42,610	$	31,094	$	11,516