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Related Party Transactions (Details) (Stephen Sadler [Member], USD $)
In Millions, unless otherwise specified
9 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Stephen Sadler [Member]
   
Related Party Transaction [Line Items]    
Consultancy fees earned by director for business acquisition-related activities $ 0.5us-gaap_ProfessionalFees
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_DirectorMember
$ 0.6us-gaap_ProfessionalFees
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_DirectorMember