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Total of debt securities categorized neither as held-to-maturity nor trading which are intended be sold or mature more than one year from the balance sheet date or operating cycle, if longer.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The cash outflow associated with extending a long-term loan to a related party. Alternate caption: Payments for Advances to Affiliates.

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Cash And Cash Equivalents, Short-Term Investments, Long-Term Investments And Other Investments (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended				9 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended					1 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010	May 30, 2011 Auction Rate Securities [Member]	Sep. 30, 2011 Asset-Backed Securities [Member] Auction Rate Securities [Member]	May 30, 2011 Asset-Backed Securities [Member]	Sep. 30, 2011 Celtic Therapeutics Holdings, L.P. [Member]	Sep. 30, 2010 Celtic Therapeutics Holdings, L.P. [Member]	Sep. 30, 2011 Celtic Therapeutics Holdings, L.P. [Member]	Sep. 30, 2010 Celtic Therapeutics Holdings, L.P. [Member]	Dec. 31, 2010 Celtic Therapeutics Holdings, L.P. [Member]	Dec. 31, 2009 Celtic Therapeutics Holdings, L.P. [Member]	Mar. 31, 2011 Celtic Therapeutics Holdings, L.P. [Member]	Sep. 30, 2011 Liquidia Technologies, Inc. [Member]	May 31, 2010 Liquidia Technologies, Inc. [Member]	Apr. 30, 2011 venBio Global Strategic Fund, L.P. [Member]	Sep. 30, 2011 venBio Global Strategic Fund, L.P. [Member]
Auction rate securities held					$ 78,700,000
Unrealized losses in auction rate securities					14,230,000
Convertible securities amount					78,747,000	14,200,000		14,200,000
Amount recognized other-than-temporary impairment losses							17,700,000
Maximum investment commitments in equity method investment			104,800,000											102,700,000				50,000,000
Remaining commitment in investment									55,000,000		55,000,000								49,800,000
Loan provided to other company			7,550,000	7,700,000									10,000,000
Payment of loan													2,000,000
Loan converted into securities															8,000,000
Outstanding loan converted to additional equity in settlement															10,000,000
Recognized income (loss) on equity method investment	1,915,000	(4,562,000)	15,103,000	(8,351,000)					1,900,000	(4,600,000)	15,100,000	(8,400,000)
Commitments to invest, equity method investments									58,300,000		58,300,000								200,000
Number of years expected to commit investment											4							5
Equity method investment ownership percentage									49.60%		49.60%
Investment in equity method																	$ 5,000,000
Ownership interest percentage																8.60%			28.60%