Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2016

Receivables [Abstract]

Schedule of Accounts Receivable

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

	December 31,
	2016			2015
Billed and billable	$	188,038		$	175,382
Less: unpaid deferred revenue		(101,538	)		(103,403	)
Accounts receivable, gross		86,500			71,979
Less: allowance for doubtful accounts		(3,181	)		(3,825	)
Accounts receivable, net	$	83,319		$	68,154