Accounts Receivable (Tables)

3 Months Ended

Mar. 31, 2017

Receivables [Abstract]

Schedule of Accounts Receivable

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

	March 31,			December 31,
	2017			2016
Billed and billable	$	156,220		$	188,038
Less: unpaid deferred revenue		(78,677	)		(101,538	)
Accounts receivable, gross		77,543			86,500
Less: allowance for doubtful accounts		(4,149	)		(3,181	)
Accounts receivable, net	$	73,394		$	83,319