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Subsequent Event (Details) (USD $) In Millions, unless otherwise specified	Nov. 01, 2011
Subsequent Event [Line Items]
Total Ownership Percentage	100.00%
Business Combination, Consideration Transferred	$ 200.0

This element represents the acquisition-date fair value of the total consideration transferred which consists of the sum of the acquisition-date fair values of the assets transferred by the acquirer, the liabilities incurred by the acquirer to former owners of the acquiree, and the equity interests issued by the acquirer.

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