Accounts Receivable (Tables)

9 Months Ended

Sep. 30, 2017

Receivables [Abstract]

Schedule of Accounts Receivable

Accounts receivable (in thousands) consisted of the following, as of:

	September 30,			December 31,
	2017			2016
Billed and billable	$	136,340		$	188,038
Less: unpaid deferred revenue		(65,912	)		(101,538	)
Accounts receivable, gross		70,428			86,500
Less: allowance for doubtful accounts		(4,091	)		(3,181	)
Accounts receivable, net	$	66,337		$	83,319