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Basis of Presentation (Details)
Jun. 30, 2012
Minimum [Member]
 
Schedule of Equity Method Investments [Line Items]  
Percentage of ownership in an entity to be considered as equity method investment (in hundredths) 20.00%
Maximum [Member]
 
Schedule of Equity Method Investments [Line Items]  
Percentage of ownership in an entity to be considered as equity method investment (in hundredths) 50.00%