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Related Party Transactions (Details) (Stephen Sadler [Member], USD $)
In Millions, unless otherwise specified
12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2010
Stephen Sadler [Member]
     
Related Party Transaction [Line Items]      
Consultancy fees earned by director for business acquisition-related activities $ 0.8 $ 0.6 $ 0.6