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Stock-Based Compensation (Tables)
9 Months Ended
Mar. 31, 2013
Stock-Based Compensation [Abstract]  
Summary Of Stock-Based Compensation Expense Recognized
  Three Months Ended Nine Months Ended
  March 31, March 31,
    2013   2012   2013   2012
Stock-based compensation included in indirect costs and                
selling expenses:                
Restricted stock and restricted stock unit (RSU)                
expense $ 349 $ 3,430 $ 5,830 $ 9,656
Non-qualified stock option and stock settled stock                
appreciation right (SSAR) expense   144   422   564   1,439
Total stock-based compensation expense $ 493 $ 3,852 $ 6,394 $ 11,095
 
Income tax benefit recognized for stock-based                
compensation expense $ 201 $ 1,483 $ 2,417 $ 4,360
Summary Of Activity Related To SSARs/Non-Qualified Stock Options And RSUs/Restricted Shares Issued
  SSARs/        
  Non-qualified     RSUs/  
  Stock Options     Restricted Shares  
Outstanding, June 30, 2012 1,683,698     1,651,321  
Granted     596,789  
Exercised/Issued (594,808 )   (280,685 )
Forfeited/Lapsed (564,844 )   (645,368 )
Outstanding, March 31, 2013 524,046     1,322,057  
Weighted average grant date fair value for RSUs/restricted shares          
granted during the nine months ended March 31, 2013     $ 59.12