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Impairment of Long-Lived Assets - Additional Information (Detail)
$ in Thousands
12 Months Ended
Jun. 30, 2015
USD ($)
Office
Jun. 30, 2014
USD ($)
Jun. 30, 2013
USD ($)
Impairment Charges [Line Items]      
Impairment of property, plant and equipment $ 0 $ 0 $ 789
Assets Leased to Others [Member]      
Impairment Charges [Line Items]      
Number of leased offices | Office 3