Identified Intangible Assets and Goodwill (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Identified Intangible Assets and Goodwill [Abstract]
Impairment loss	$ 0	$ 25,990,000	$ 0
Impairment of in-process research and development		19,700,000
Goodwill impairment loss		$ 6,300,000