Accounts Receivable (Table)

12 Months Ended

Dec. 31, 2015

Accounts Receivable

Schedule of components of accounts receivables

December 31,	2015			2014
(in thousands)
Trade receivables:
Billed	$	190,567		$	521,693
Unbilled		40,731			125,363
Other receivables		11,494			3,025
Total		242,792			650,081
Less: allowance for doubtful accounts		(10,605	)		(15,351	)
Accounts receivable, net	$	232,187		$	634,730

Schedule of changes in allowance for doubtful accounts

Years Ended December 31,	2015			2014
(in thousands)
Beginning balance	$	15,351		$	13,497
Bad debt		(2,958	)		2,280
Accounts written-off		(2,825	)		(1,225	)
Recoveries		1,037			799
Ending balance	$	10,605		$	15,351