v2.4.0.6
Accumulated Other Comprehensive Loss (Accumulated Other Comprehensive Loss) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Nov. 30, 2012
Nov. 30, 2011
Nov. 30, 2012
Nov. 30, 2011
Schedule of Accumulated Other Comprehensive Loss [Line Items]        
Balance as of February 29, 2012     $ (62,459)  
Amortization recognized in net pension expense 188 [1] 72 [1] 637 [1] 230 [1]
Effective portion of changes in fair value (543) [2] (8,171) [2] 4,091 [2] (18,783) [2]
Reclassifications to CarMax Auto Finance income 2,021 [3] 2,258 [3] 5,986 [3] 4,353 [3]
Balance as of November 30, 2012 (51,745)   (51,745)  
Unrecognized Actuarial Losses [Member]
        
Schedule of Accumulated Other Comprehensive Loss [Line Items]        
Balance as of February 29, 2012     (39,774)  
Amortization recognized in net pension expense     637  
Balance as of November 30, 2012 (39,137)   (39,137)  
Unrecognized Hedge Losses [Member]
        
Schedule of Accumulated Other Comprehensive Loss [Line Items]        
Balance as of February 29, 2012     (22,685)  
Effective portion of changes in fair value     4,091  
Reclassifications to CarMax Auto Finance income     5,986  
Balance as of November 30, 2012 $ (12,608)   $ (12,608)  
[1] Net of tax of $112 and $43 for the three months ended November 30, 2012 and 2011, respectively; and $263 and $115 for the nine months ended November 30, 2012 and 2011, respectively.
[2] Net of tax benefit of $351 for the three months ended November 30, 2012, and net of tax of $6,927 for the three months ended November 30, 2011; and net of tax benefit of $11,377 and net of tax of $421 for the nine months ended November 30, 2012 and 2011, respectively. The nine months ended November 30, 2012, includes a tax benefit adjustment of $8,518 related to prior years.
[3] Net of tax of $1,306 and $0 for the three months ended November 30, 2012 and 2011, respectively; and $3,869 and $0 for the nine months ended November 30, 2012 and 2011, respectively.