Accounts Receivable

12 Months Ended

Dec. 31, 2013

Accounts Receivable

Accounts Receivable

Note 2: Accounts Receivable

Accounts receivable, net consists of the following:

December 31,	2013			2012
(in thousands)
Trade receivables:
Billed	$	368,583		$	310,997
Unbilled		80,806			82,649
Other receivables		1,240			2,994
Total		450,629			396,640
Less: allowance for doubtful accounts		(13,497	)		(9,110	)
Accounts receivable, net	$	437,132		$	387,530

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,	2013			2012
(in thousands)
Beginning balance	$	9,110		$	8,093
Bad debt expense		8,815			1,784
Accounts written-off		(5,421	)		(1,132	)
Recoveries		993			365
Ending balance	$	13,497		$	9,110