RECEIVABLES (Tables)

12 Months Ended

Dec. 31, 2014

RECEIVABLES

Schedule of receivables

$s in thousands	2014			2013
Trade	$	116,218		$	42,055
Unbilled revenue		17,857			1,296
Other		1,890			810
Total receivables		135,965			44,161
Allowance for doubtful accounts		(704	)		(525	)
Receivables, net	$	135,261		$	43,636

Schedule of change in the allowance for doubtful accounts receivable

$s in thousands	Balance at Beginning of Period		Charged (Credited) to Costs and Expenses		Recoveries (Deductions/ Write-offs)			Adjustments			Balance at End of Period
Year ended December 31, 2014	$	525	$	1,391	$	(1,211	)	$	(1	)	$	704
Year ended December 31, 2013	$	468	$	138	$	(70	)	$	(11	)	$	525
Year ended December 31, 2012	$	311	$	137	$	17		$	3		$	468