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Fair Value (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended 9 Months Ended 12 Months Ended
Feb. 29, 2012
Significant Other Observable Market Inputs (Level 2)
Discounted cash flow analysis
Note receivable
Nov. 30, 2012
Significant Other Observable Market Inputs (Level 2)
Discounted cash flow analysis
Long-term debt - fixed rate
Nov. 30, 2012
Significant Other Observable Market Inputs (Level 2)
Discounted cash flow analysis
Long-term debt - fixed rate
One Senior Note
Feb. 29, 2012
Significant Other Observable Market Inputs (Level 2)
Discounted cash flow analysis
Long-term debt - fixed rate
Multiple Senior Notes
Minimum
Feb. 29, 2012
Significant Other Observable Market Inputs (Level 2)
Discounted cash flow analysis
Long-term debt - fixed rate
Multiple Senior Notes
Maximum
Nov. 30, 2012
Recurring
Fair Values
Feb. 29, 2012
Recurring
Fair Values
Nov. 30, 2012
Recurring
Fair Values
Interest rate swaps
Feb. 29, 2012
Recurring
Fair Values
Interest rate swaps
Nov. 30, 2012
Recurring
Fair Values
Foreign currency contracts and currency swaps
Feb. 29, 2012
Recurring
Fair Values
Foreign currency contracts and currency swaps
Nov. 30, 2012
Recurring
Fair Values
Long-term debt - fixed rate
Feb. 29, 2012
Recurring
Fair Values
Long-term debt - fixed rate
Nov. 30, 2012
Recurring
Fair Values
Long-term debt - floating rate
Feb. 29, 2012
Recurring
Fair Values
Long-term debt - floating rate
Nov. 30, 2012
Recurring
Fair Values
Money market accounts
Feb. 29, 2012
Recurring
Fair Values
Money market accounts
Feb. 29, 2012
Recurring
Quoted Prices in Active Markets for Identical Assets (Level 1)
Nov. 30, 2012
Recurring
Quoted Prices in Active Markets for Identical Assets (Level 1)
Money market accounts
Feb. 29, 2012
Recurring
Quoted Prices in Active Markets for Identical Assets (Level 1)
Money market accounts
Nov. 30, 2012
Recurring
Significant Other Observable Market Inputs (Level 2)
Feb. 29, 2012
Recurring
Significant Other Observable Market Inputs (Level 2)
Nov. 30, 2012
Recurring
Significant Other Observable Market Inputs (Level 2)
Interest rate swaps
Feb. 29, 2012
Recurring
Significant Other Observable Market Inputs (Level 2)
Interest rate swaps
Nov. 30, 2012
Recurring
Significant Other Observable Market Inputs (Level 2)
Foreign currency contracts and currency swaps
Feb. 29, 2012
Recurring
Significant Other Observable Market Inputs (Level 2)
Foreign currency contracts and currency swaps
Nov. 30, 2012
Recurring
Significant Other Observable Market Inputs (Level 2)
Long-term debt - fixed rate
Feb. 29, 2012
Recurring
Significant Other Observable Market Inputs (Level 2)
Long-term debt - fixed rate
Nov. 30, 2012
Recurring
Significant Other Observable Market Inputs (Level 2)
Long-term debt - floating rate
Feb. 29, 2012
Recurring
Significant Other Observable Market Inputs (Level 2)
Long-term debt - floating rate
Assets:                                                            
Cash and cash equivalents                               $ 850 $ 801   $ 850 $ 801                    
Note receivable             737                             737                
Total assets             1,538                     801       737                
Liabilities:                                                            
Long-term debt   105,490                   105,492 104,450 75,000 75,000                       105,492 104,450 75,000 75,000
Derivative liabilities               5,696 8,553 381 163                       5,696 8,553 381 163        
Total liabilities           $ 186,569 $ 188,166                           $ 186,569 $ 188,166                
Fair value additional disclosures                                                            
Discount rate (as a percent) 6.95%   2.07% 0.54% 3.54%