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Stock Based Compensation RSU Measurement Date Assumptions (Details) (Restricted Stock Units (RSUs) [Member])
12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Restricted Stock Units (RSUs) [Member]
   
RSU grant date weighted average fair value assumptions    
Volatility 34.20% 37.00%
Risk free interest rate 0.31% 0.90%
Dividend yield 1.50% 1.60%
Stock Beta 0.903 0.890