v2.4.0.6
Stock Option Plan (Details 4) (Restricted stock, USD $)
3 Months Ended 6 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Restricted stock
       
Stock option plan        
Unrecognized compensation $ 12,600,000   $ 12,600,000  
Weighted average period of total unrecognized compensation expense related to unvested stock options granted     2 years 1 month 6 days  
Fair value of share-based compensation awards vested in period     2,900,000  
Stock based compensation expense $ 1,900,000 $ 1,400,000 $ 3,700,000 $ 2,500,000