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Summary of Significant Accounting Policies (Details) (Three Wholesalers)	12 Months Ended
	Dec. 31, 2011 item	Dec. 31, 2010	Dec. 31, 2009
Product sales | Customer concentration
Concentration of credit risk and other risks and uncertainties
Product's sales (as a percent)	89.00%	87.00%	86.00%
Number of wholesalers	3
Accounts receivable | Credit concentration
Concentration of credit risk and other risks and uncertainties
Product's sales (as a percent)	97.00%	99.00%	98.00%
Number of wholesalers	3

X

- Definition

Represents the number of customers who accounted for over the threshold percentage of net sales, which the entity uses for disclosure.

+ References

No definition available.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592



Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Topic 825

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-Publisher FASB

-Name Accounting Standards Codification

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