EARNINGS PER SHARE - Anti-dilutive Securities (Details) - shares
shares in Thousands
12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Potential shares of common stock 2 36 1,022
Stock options      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Potential shares of common stock 0 0 658
Restricted stock units      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Potential shares of common stock 2 36 364