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Share-Based Compensation (Restricted Stock Granted) (Details) (Restricted Stock [Member], USD $)
 12 Months Ended
Jun. 30, 2011
Shares granted 144,968
Grant date fair value $ 32.78
Certain Employees Based on Promotions [Member]
  
Shares granted 2,200
Date granted August 24, 2010
Grant date fair value $ 24.77
Vesting period Annually over 3 years
Certain Employees [Member]
  
Shares granted 89,760
Date granted December 3, 2010
Grant date fair value $ 31.13
Vesting period Annually over 3 years
Certain Employees, Granted on May [Member]
  
Shares granted 30,040
Date granted May 4, 2011
Grant date fair value $ 36.17
Vesting period Annually over 3 years
Executive Officers, Vesting Based on Certain Service and Performance Conditions [Member]
  
Shares granted 12,268
Date granted June 6, 2011
Grant date fair value $ 35.05
Vesting period Annually over 3 years
Non-Employee Directors [Member]
  
Shares granted 10,700 [1]
Date granted May 4, 2011 [1]
Grant date fair value $ 36.17 [1]
Vesting period 6 months [1]
[1] Per the Amended and Restated Director's Equity Compensation Plan, non-employee directors will receive annual awards of restricted stock, as opposed to stock options. The number of shares of restricted stock to be granted will be established from time to time by the Board of Directors. Currently, the number of shares of restricted stock awarded to each non-employee director will be determined by dividing $80,000 by the fair market value of the common stock on the date of grant. These awards will generally vest in full on the day that is six months after the date of grant or upon the earlier occurrence of (i) the director's termination of service as a director by reason of death, disability or retirement, or (ii) a change in control by the Company. The compensation expense associated with these awards will be recognized on a pro-rata basis over this period.