Contract Assets and Contract Liabilities (Tables)

3 Months Ended

Mar. 31, 2019

Revenue From Contract With Customer [Abstract]

Summary of Company's Contract Asset and Contract Liability

Accounts receivable and unbilled, net consisted of the following (in thousands):

	As of
	March 31,			December 31,
	2019			2018
Accounts receivable	$	107,241		$	85,120
Unbilled receivables		28,252			49,361
Less: allowance for doubtful accounts		(5,869	)		(1,032	)
Total accounts receivable and unbilled, net	$	129,624		$	133,449

Advanced billings consisted of the following (in thousands):

	As of
	March 31,		December 31,
	2019		2018
Advanced billings	$	150,243	$	147,935