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FAIR VALUE OF FINANCIAL INSTRUMENTS - Additional Information (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2012
Fair Value Disclosures [Abstract]        
Deposits of cash outside the United States $ 397,000      
Cash and cash equivalents $ 446,401 $ 347,097 $ 227,826 $ 122,060