Revenue (Tables)

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of revenue

The following table presents the Company’s revenue disaggregated by sales recorded over-time and sales recorded at a point in time (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Over-time revenue	$	189,622	$	98,637	$	421,475	$	516,598
Point in time revenue	13,174		16,279		27,253		36,036
Total revenue	$	202,796	$	114,916	$	448,728	$	552,634

Contract assets consisting of unbilled receivables are recorded within accounts receivable on the consolidated balance sheets on a contract-by-contract basis at the end of the reporting period and consisted of the following (in thousands):

	June 30, 2021		December 31, 2020
Unbilled receivables	$	37,567	$	18,073

Contract liabilities consisting of deferred revenue recorded on a contract-by-contract basis at the end of each reporting period were as follows (in thousands):

	June 30, 2021		December 31, 2020
Deferred revenue	$	51,458	$	149,821