Property And Equipment (Tables)

12 Months Ended

Dec. 31, 2011

Property And Equipment [Abstract]

Schedule Of Property And Equipment

	December 31,
	2011			2010
Leasehold improvements	$	18,818		$	12,540
Laboratory equipment		15,377			13,763
Computers and office equipment		5,590			4,419
Furniture and fixtures		4,691			3,131
		44,476			33,853
Less: accumulated depreciation and amortization		(24,824	)		(21,542	)
Total	$	19,652		$	12,311