Accounts Receivable, Net (Tables)

9 Months Ended

Sep. 30, 2019

Receivables [Abstract]

Accounts Receivable, Net

Accounts receivable, net, at September 30, 2019 and December 31, 2018 were as follows (in thousands):

	September 30,			December 31,
	2019			2018
Trade accounts receivable	$	175,724		$	159,992
Unbilled revenue, at net realizable value		98,606			60,684
Total accounts receivable		274,330			220,676
Allowance for doubtful accounts		(13,361	)		(13,389	)
Accounts receivable, net	$	260,969		$	207,287