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Consolidated Condensed Statements of Comprehensive Income (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Nov. 30, 2012
Nov. 30, 2011
Nov. 30, 2012
Nov. 30, 2011
Net income $ 43,804 $ 39,060 $ 99,405 $ 92,854
Auction rate security activity, before tax        
Changes in fair market value       1,465
Settlements reclassified to income       (126)
Subtotal       1,339
Total other comprehensive income, before tax 1,299 1,826 2,595 2,965
Comprehensive income, before tax 45,103 40,886 102,000 95,819
Net income, tax (6,085) (6,181) (15,246) (11,777)
Auction rate security activity, tax        
Changes in fair market value       (520)
Settlements reclassified to income       65
Subtotal       (455)
Total other comprehensive income, tax (514) (628) (968) (902)
Comprehensive income, tax (6,599) (6,809) (16,214) (12,679)
Net income 37,719 32,879 84,159 81,077
Auction rate security activity, net of tax        
Changes in fair market value       945
Settlements reclassified to income       (61)
Subtotal       884
Total other comprehensive income, net of tax 785 1,198 1,627 2,063
Comprehensive income, net of tax 38,504 34,077 85,786 83,140
Interest rate swaps
       
Cash flow hedge activity, before tax        
Changes in fair market value 452 187 (49) (3,101)
Settlements reclassified to income 1,000 922 2,906 3,551
Subtotal 1,452 1,109 2,857 450
Cash flow hedge activity, tax        
Changes in fair market value (158) (65) 17 1,342
Settlements reclassified to income (350) (323) (1,017) (1,404)
Subtotal (508) (388) (1,000) (62)
Cash flow hedge activity, net of tax        
Changes in fair market value 294 122 (32) (1,759)
Settlements reclassified to income 650 599 1,889 2,147
Subtotal 944 721 1,857 388
Foreign currency swaps and contracts
       
Cash flow hedge activity, before tax        
Changes in fair market value (596) 682 (619) 694
Ineffectiveness recorded in income 93 (40) 44 138
Settlements reclassified to income 350 75 313 344
Subtotal (153) 717 (262) 1,176
Cash flow hedge activity, tax        
Changes in fair market value 64 (228) 73 (231)
Ineffectiveness recorded in income (15) 13 2 (43)
Settlements reclassified to income (55) (25) (43) (111)
Subtotal (6) (240) 32 (385)
Cash flow hedge activity, net of tax        
Changes in fair market value (532) 454 (546) 463
Ineffectiveness recorded in income 78 (27) 46 95
Settlements reclassified to income 295 50 270 233
Subtotal $ (159) $ 477 $ (230) $ 791