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SHARE-BASED COMPENSATION (Details 3) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 36 Months Ended 3 Months Ended
Jun. 30, 2012
Restricted stock units
Y
Jun. 30, 2011
Restricted stock units
Jun. 30, 2012
Restricted stock units
Non-performance based
Y
Mar. 31, 2012
Restricted stock units
Non-performance based
Y
Jun. 30, 2012
Restricted stock units
Vesting in equal annual increments over four years
Jun. 30, 2012
Restricted stock units
Performance-based
Y
Mar. 31, 2012
Restricted stock units
Performance-based
Y
Jun. 30, 2012
Restricted stock units
Vesting based on total shareholder return
Mar. 31, 2015
Restricted stock units
Vesting based on total shareholder return
Mar. 31, 2015
Restricted stock units
Vesting based on total shareholder return
Minimum
Mar. 31, 2015
Restricted stock units
Vesting based on total shareholder return
Maximum
Jun. 30, 2012
Restricted stock units
Vesting based on common stock price targets
Chief product and engineering officer
Jun. 30, 2012
Restricted stock units
Vesting based on common stock price targets
Maximum
Chief product and engineering officer
Jun. 30, 2012
Stock options
Y
Jun. 30, 2011
Stock options
Share-based compensation                              
Share-based compensation expense $ 2.2 $ 2.0                       $ 0.4 $ 0.4
Future share-based compensation expense expected 24.3                         6.4  
Period for recognition of unrecognized stock-based compensation expense (in years) 4                         4  
Non-vested restricted stock unit activity                              
Outstanding at the beginning of the period (in shares)     1,175,161     511,864                  
Granted (in shares)     533,992     384,563     333,463     51,100      
Vested (in shares)     (338,431)                        
Forfeited or cancelled (in shares)     (55,470)                        
Outstanding at the end of the period (in shares)     1,315,252 1,175,161   896,427 511,864                
Non-vested restricted stock units, Weighted average fair value per share at grant date                              
Outstanding at the beginning of the period (in dollars per share)     $ 13.40     $ 10.91                  
Granted (in dollars per share)     $ 13.28     $ 13.50                  
Vested (in dollars per share)     $ 13.22                        
Forfeited or cancelled (in dollars per share)     $ 14.24                        
Outstanding at the end of the period (in dollars per share)     $ 13.36 $ 13.40   $ 12.02 $ 10.91                
Weighted-average remaining contractual term (in years)                              
Weighted-average remaining contractual term at the beginning of the period (in years)     2.76 2.21   2.32 2.31                
Weighted-average remaining contractual term at the end of the period (in years)     2.76 2.21   2.32 2.31                
Restricted Stock Unit Activity - Other disclosures                              
Aggregate fair value of restricted stock units granted     $ 7.1     $ 5.2                  
Performance share awards vested (as a percent)                   0.00% 200.00%   100.00%    
Award vesting period         4 years     4 years