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LONG-TERM DEBT (Details 3) (USD $)
12 Months Ended
Feb. 28, 2014
Feb. 28, 2013
Feb. 29, 2012
Long-term debt      
Limit on additional debt borrowings $ 391,800,000    
INTEREST EXPENSE      
Interest and commitment fees 5,609,000 8,858,000 7,670,000
Deferred finance costs 912,000 903,000 823,000
Interest rate swap settlements, net 3,672,000 3,584,000 4,424,000
Total interest expense 10,193,000 13,345,000 12,917,000
Fixed rate Senior Notes | Fair value
     
Long-term debt      
Long-term debt 83,951,000 105,725,000  
Fixed rate Senior Notes | Fair value | Fair Value, Level 2
     
Long-term debt      
Long-term debt 83,951,000 105,725,000  
Fixed rate Senior Notes | Fair value | Fair Value, Level 2 | Discounted cash flow analysis
     
Long-term debt      
Long-term debt 83,950,000    
Fixed rate Senior Notes | Book value
     
Long-term debt      
Long-term debt $ 80,000,000