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OTHER COMPREHENSIVE INCOME (Details) (USD $)
 12 Months Ended
Feb. 29, 2012
Feb. 28, 2011
Feb. 28, 2010
Before Tax      
Other comprehensive income, before tax $ 3,280,000 $ 1,175,000 $ 2,623,000
Auction rate security activity, before tax      
Changes in fair market value 1,465,000 562,000 852,000
Settlement gains reclassified to income (126,000) (35,000) (42,000)
Subtotal 1,339,000 527,000 810,000
Tax      
Other comprehensive income, tax (1,019,000) (451,000) (903,000)
Auction rate security activity,tax      
Changes in fair market value (520,000) (191,000) (289,000)
Settlement gains reclassified to income 65,000 12,000 14,000
Subtotal (455,000) (179,000) (275,000)
Net of Tax      
Other comprehensive income, net of tax 2,261,000 724,000 1,720,000
Auction rate security activity, net of tax      
Changes in fair market value 945,000 371,000 563,000
Settlement gains reclassified to income (61,000) (23,000) (28,000)
Subtotal 884,000 348,000 535,000
Components of accumulated other comprehensive loss      
Temporary impairment loss on available for sale securities, net of tax   (884,000)  
Deferred tax benefits (expense) included in accumulated other comprehensive loss   460,000  
Total accumulated other comprehensive loss (5,589,000) (7,850,000)  
Interest rate swaps
      
Cash flow hedge activity, before tax      
Changes in fair market value (3,353,000) (3,600,000) (4,661,000)
Settlements reclassified to income 4,424,000 5,997,000 6,510,000
Subtotal 1,071,000 2,397,000 1,849,000
Cash flow hedge activity, tax      
Changes in fair market value 1,430,000 1,224,000 1,586,000
Settlements reclassified to income (1,709,000) (2,039,000) (2,215,000)
Subtotal (279,000) (815,000) (629,000)
Cash flow hedge activity, net of tax      
Changes in fair market value (1,923,000) (2,376,000) (3,075,000)
Settlements reclassified to income 2,715,000 3,958,000 4,295,000
Subtotal 792,000 1,582,000 1,220,000
Components of accumulated other comprehensive loss      
Unrealized holding losses on cash flow hedges, net of tax (5,559,000) (6,352,000)  
Deferred tax benefits (expense) included in accumulated other comprehensive loss 2,990,000 3,270,000  
Foreign currency
      
Cash flow hedge activity, before tax      
Changes in fair market value 563,000 (1,556,000) 7,000
Ineffectiveness recorded in income 63,000 16,000 (12,000)
Settlements reclassified to income 244,000 (209,000) (31,000)
Subtotal 870,000 (1,749,000) (36,000)
Cash flow hedge activity, tax      
Changes in fair market value (188,000) 483,000  
Ineffectiveness recorded in income (19,000) (5,000)  
Settlements reclassified to income (78,000) 65,000 1,000
Subtotal (285,000) 543,000 1,000
Cash flow hedge activity, net of tax      
Changes in fair market value 375,000 (1,073,000) 7,000
Ineffectiveness recorded in income 44,000 11,000 (12,000)
Settlements reclassified to income 166,000 (144,000) (30,000)
Subtotal 585,000 (1,206,000) (35,000)
Components of accumulated other comprehensive loss      
Unrealized holding losses on cash flow hedges, net of tax (30,000) (614,000)  
Deferred tax benefits (expense) included in accumulated other comprehensive loss $ (20,000) $ 300,000