Acquisitions (Tables)

3 Months Ended

Mar. 31, 2012

Acquisitions [Abstract]

Allocation Of Purchase Price To Assets And Liabilities

Current assets	$	12,479
Acquired technologies with a weighted average useful life of 5.2 years		24,500
In-process research and development		400
Customer relationships with a useful life of 4.0 years		11,300
Trademarks and trade names with a useful life of 10.0 years		1,800
Goodwill		18,690
Deferred income tax assets – non-current		9,872
Other non-current assets		2,419
Current liabilities		(6,328	)
Deferred revenue – current		(9,383	)
Deferred revenue – non-current		(9,491	)
Other long-term liabilities		(278	)
Total purchase price	$	55,980