Accounts Receivable

12 Months Ended

Dec. 31, 2012

Accounts Receivable

Accounts Receivable

Note 2: Accounts Receivable

Accounts receivable, net consists of the following:

December 31,	2012			2011
(in thousands)
Trade receivables:
Billed	$	310,997		$	367,718
Unbilled		82,649			99,913
Other receivables		2,994			1,734
Total		396,640			469,365
Less: allowance for doubtful accounts		(9,110	)		(8,093	)
Accounts receivable, net	$	387,530		$	461,272

Trade receivables relate to sale of our services and products, for which credit is extended based on our evaluation of the customer’s credit worthiness.  Unbilled receivables represent revenues earned but not billed to the customer until future dates, usually within one month.  Other receivables consist primarily of amounts due from purchasers of Company property and rebates from suppliers.

Changes in the Company’s allowance for doubtful accounts are as follows:

Years Ended December 31,	2012			2011
(in thousands)
Beginning balance	$	8,093		$	8,695
Bad debt expense		1,784			2,868
Accounts written-off		(1,132	)		(3,820	)
Recoveries		365			350
Ending balance	$	9,110		$	8,093