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Earnings Per Share (Tables)
6 Months Ended
Dec. 31, 2011
Earnings Per Share [Abstract]  
Computation Of Earnings Per Share And Weighted Average Number Of Basic And Diluted Shares
                 
  Three Months Ended
December 31,
Six Months Ended
December 31,
  2011 2010 2011 2010
Net income attributable to CACI $ 41,061 $ 33,235 $ 83,201 $ 61,890
Weighted average number of basic shares outstanding                
during the period   26,450   30,288   27,683   30,296
Dilutive effect of SSARs/stock options and                
RSUs/restricted shares after application of treasury                
stock method   816   618   871   708
Dilutive effect of the Notes   4     2  
Weighted average number of diluted shares outstanding                
during the period   27,270   30,906   28,556   31,004
Basic earnings per share $ 1.55 $ 1.10 $ 3.01 $ 2.04
Diluted earnings per share $ 1.51 $ 1.08 $ 2.91 $ 2.00