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Legal Proceedings (Details) (USD $)
3 Months Ended9 Months Ended12 Months Ended37 Months Ended46 Months Ended9 Months Ended6 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Dec. 31, 2000
i2 [Member]
Dillard's Inc [Member]
Pending or Threatened Litigation [Member]
Sep. 30, 2010
i2 [Member]
Dillard's Inc [Member]
Pending or Threatened Litigation [Member]
Jun. 30, 2011
i2 [Member]
Dillard's Inc [Member]
Pending or Threatened Litigation [Member]
Sep. 30, 2011
i2 [Member]
Dillard's Inc [Member]
Pending or Threatened Litigation [Member]
Dec. 31, 2010
i2 [Member]
Dillard's Inc [Member]
Pending or Threatened Litigation [Member]
Oct. 04, 2010
i2 [Member]
Dillard's Inc [Member]
Pending or Threatened Litigation [Member]
Jan. 31, 2010
i2 [Member]
Dillard's Inc [Member]
Pending or Threatened Litigation [Member]
Sep. 30, 2011
i2 [Member]
Oracle [Member]
Sep. 30, 2011
Oracle [Member]
Jun. 24, 2011
i2 [Member]
Pending or Threatened Litigation [Member]
Loss Contingencies [Line Items]              
Loss Contingency, Damages Sought, Value      $ 8,100,000       
Number of agreements    2         
Adverse court judgement amount     237,000,000        
Post judgement interest     5.00%        
Supersedeas bond posted         25,000,000    
Loss Contingency, Range of Possible Loss, Minimum       19,000,000      
Loss Contingency, Range of Possible Loss, Maximum       237,000,000      
Loss Contingency, Estimate of Possible Loss       19,000,000      
Loss Contingency Accrual, at Carrying Value        14,000,000 5,000,000   
Litigation settlement0037,500,0000       35,000,000  
Litigation settlement, noncash credit amount for services           2,500,000  
Maximum time period for receipt of settlement            2 years 
Loss contingency settlement agreement consideration amount             $ 500,000