Accounts Receivable (Table)

12 Months Ended

Dec. 31, 2016

Accounts Receivable

Schedule of components of accounts receivables

December 31,	2016			2015
(in thousands)
Trade receivables:
Billed	$	122,216		$	190,567
Unbilled		39,223			40,731
Other receivables		10,280			11,494
Total		171,719			242,792
Less: allowance for doubtful accounts		(2,553	)		(10,605	)
Accounts receivable, net	$	169,166		$	232,187

Schedule of changes in allowance for doubtful accounts

Years Ended December 31,	2016			2015
(in thousands)
Beginning balance	$	10,605		$	15,351
Bad debt expense (reduction)		6,021			(2,958	)
Accounts written-off		(14,101	)		(2,825	)
Recoveries		28			1,037
Ending balance	$	2,553		$	10,605