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Derivative Instruments And Hedging Activities (Tables)
12 Months Ended
Jun. 30, 2011
Derivative Instruments And Hedging Activities (Tables) [Abstract]  
Accumulated other comprehensive income and earnings from cash flow hedges
                 
    2011   2010
 
Unrealized gain recognized in accumulated other comprehensive income
  $ 231     $ 2,092  
Realized gain reclassified into earnings
    7,119       5,662