Goodwill (Details) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Nov. 17, 2011	Dec. 31, 2010	Dec. 31, 2004 Kali Laboratories, Inc [Member]
Goodwill [Line Items]
Acquisition of capital stock		$ 412,753		$ 142,800
Incremental goodwill	219,703	219,703
Number of common stock purchased on acquisition				150,000
Value of common stock purchased				2,500
Goodwill	$ 283,432		$ 63,729	$ 63,729

The acquisition-date fair value of the equity interests of the acquirer, including the number of instruments or interests issued or issuable in consideration for the business combination.

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Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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