Accounts Receivable And Unbilled Services

9 Months Ended

Sep. 30, 2011

Accounts Receivable And Unbilled Services

Accounts Receivable And Unbilled Services

4. Accounts Receivable and Unbilled Services

Accounts receivable and unbilled services, net, consisted of the following amounts on the dates set forth below:

	December 31, 2010			September 30, 2011
Billed	$	276,240		$	320,167
Unbilled		168,037			190,081
Allowance for doubtful accounts		(8,401	)		(5,241	)
Total accounts receivable and unbilled services, net	$	435,876		$	505,007