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Stock-Based Compensation (Tables)
3 Months Ended
Sep. 30, 2012
Stock-Based Compensation [Abstract]  
Summary Of Stock-Based Compensation Expense Recognized
  Three Months Ended
  September 30,
    2012   2011
Stock-based compensation included in indirect costs and selling expenses:        
Restricted stock and restricted stock unit (RSU) expense $ 2,154 $ 2,606
Non-qualified stock option and stock settled stock appreciation right        
(SSAR) expense   246   606
Total stock-based compensation expense $ 2,400 $ 3,212
 
Income tax benefit recognized for stock-based compensation expense $ 914 $ 1,281
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     258,721  
Exercised/Issued (98,850 )   (204,293 )
Forfeited/Lapsed (547,559 )   (444,938 )
Outstanding, September 30, 2012 1,037,289     1,260,811  
 
Weighted average grant date fair value for RSUs/restricted shares     $ 67.25