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Related Party Transactions (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Stephen Sadler [Member]      
Related Party Transaction [Line Items]      
Consultancy fees earned by director for business acquisition-related activities $ 0.5 $ 0.7 $ 0.6