SHARE-BASED COMPENSATION (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
Jun. 30, 2012 Y	Jun. 30, 2011 Y	Jun. 30, 2010 Y
Stock options
Share-Based Compensation
Unrecognized compensation cost	$ 6.8
Unrecognized compensation cost, period for recognition (in years)	1.64
Weighted Average:
Expected option term (in years)	4.36	4.61	4.66
Expected volatility (as a percent)	56.90%	54.91%	56.04%
Risk-free interest rate (as a percent)	0.89%	1.76%	2.23%
Expected annual dividend yield (as a percent)	0.00%	0.00%	0.00%
Restricted stock
Share-Based Compensation
Unrecognized compensation cost	$ 19.5
Unrecognized compensation cost, period for recognition (in years)	2.09

The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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