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Equity Incentive Plans and Stock-Based Compensation (Details) (Stock-Based Incentive Compensation Plans)
 3 Months Ended
Mar. 31, 2013
Jun. 30, 2012
Stock-Based Incentive Compensation Plans
    
Stock-Based Compensation    
Number of shares reserved under the 2006 Purchase Plan 21,400,000  
Shares available for grant    
Shares available, at the beginning of the year 2,729,159  
Increase in shares approved for issuance   6,500,000
Stock options granted (in shares) (1,619,437)  
Stock options forfeited (in shares) 893,744  
Stock options expired under former plans (in shares) (291,219)  
Nonvested equity stock and stock units granted (in shares) (414,744) [1]  
Nonvested equity stock and stock units forfeited (in shares) 88,370 [1]  
Shares available, at the end of the period 1,385,873  
Conversion factor used to calculate the decrease in the number of shares available for grant resulting from the grant of restricted stock awards 1.5  
Conversion factor used to calculate the increase in the number of shares available for grant resulting from the forfeiture of restricted stock awards 1.5  
[1] For purposes of determining the number of shares available for grant under the 2006 Plan against the maximum number of shares authorized, each restricted stock granted reduces the number of shares available for grant by 1.5 shares and each restricted stock forfeited increases shares available for grant by 1.5 shares.