Receivables

12 Months Ended

Dec. 31, 2012

Receivables [Abstract]

Receivables

(2)  Receivables

The components of receivables as of December 31, 2012 and 2011 were as follows (in thousands):

	2012		2011
Billed	$	41,078	$	48,382
Unbilled (principally December work billed in January)		49,543		69,186
Total receivables, net	$	90,621	$	117,568

The unbilled balance includes certain costs for work performed at risk but which we believe will be funded by the government totaling approximately $7.1 million and $5.5 million as of December 31, 2012, and 2011, respectively. We expect to invoice substantially all unbilled receivables during 2013.