v2.4.0.6
Comprehensive Income (Accumulated Other Comprehensive Loss) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Nov. 30, 2011
Nov. 30, 2010
Nov. 30, 2011
Nov. 30, 2010
Schedule of Accumulated Other Comprehensive Loss [Line Items]        
Balance as of March 1, 2011     $ (25,057)  
Amortization recognized in net pension expense 72 48 230 120
Effective portion of changes in fair value (9,209) (4,579) (18,914) (10,917)
Reclassifications to net earnings 3,296 812 4,484 1,035
Balance as of November 30, 2011 (39,257)   (39,257)  
Unrecognized Actuarial Losses [Member]
       
Schedule of Accumulated Other Comprehensive Loss [Line Items]        
Balance as of March 1, 2011     (17,528)  
Amortization recognized in net pension expense     230  
Balance as of November 30, 2011 (17,298)   (17,298)  
Unrecognized Hedge Losses [Member]
       
Schedule of Accumulated Other Comprehensive Loss [Line Items]        
Balance as of March 1, 2011     (7,529)  
Effective portion of changes in fair value     (18,914)  
Reclassifications to net earnings     4,484  
Balance as of November 30, 2011 $ (21,959)   $ (21,959)