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Basis of Presentation and New Accounting Pronouncements (Details) (USD $) In Millions	Dec. 31, 2010
Basis of Presentation and New Accounting Pronouncements
Increase in professional liabilities classified as long-term	$ 99.8
Professional liabilities included in accounts payable and accrued expenses	$ 111.7

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Basis of Presentation and New Accounting Pronouncements [Abstract]

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Increase in professional liabilities classified as long-term

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Professional liabilities included in accounts payable and accrued expenses.

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