Business Segment Data

9 Months Ended

Sep. 30, 2011

Business Segment Data

Business Segment Data

14. Business Segment Data

The Company evaluates segment performance and allocates resources based on net revenue and operating income (loss). Depreciation and amortization expense is allocated to the business unit based on various operational metrics, such as headcount and space. In addition, net revenue and operating income (loss) by segment exclude reimbursed revenue. The Company has a global infrastructure supporting its business segments, and therefore, assets are not identified by reportable segment.

Net revenue and operating income (loss) by business segment were as follows as of the dates set forth below:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2010		2011		2010			2011
Net revenue:
Clinical Development Services	$	260,345	$	292,025	$	765,075		$	863,230
Laboratory Services		79,045		90,848		231,921			252,007
Discovery Sciences		—		—		8,010			—
Reimbursed revenue		25,985		32,522		77,054			91,063
Total	$	365,375	$	415,395	$	1,082,060		$	1,206,300
Operating income (loss):
Clinical Development Services	$	43,681	$	53,771	$	101,830		$	148,748
Laboratory Services		13,154		11,648		34,631			26,266
Discovery Sciences		—		—		(11,860	)		—
Total	$	56,835	$	65,419	$	124,601		$	175,014