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Financial Instruments and Risk Management (Details 3) (Designated as cash flow hedging instruments) In Thousands, unless otherwise specified | Feb. 28, 2013 Prepaid Expenses and Other Current Assets USD ($) | Nov. 30, 2013 Accrued Expenses and Other Current Liabilities USD ($) | Feb. 28, 2013 Accrued Expenses and Other Current Liabilities USD ($) | Feb. 28, 2013 Other Liabilities, Non-current USD ($) | Nov. 30, 2013 Foreign currency contracts Euros EUR (€) | Feb. 28, 2013 Foreign currency contracts Euros EUR (€) | Feb. 28, 2013 Foreign currency contracts Euros Prepaid Expenses and Other Current Assets USD ($) | Nov. 30, 2013 Foreign currency contracts Euros Accrued Expenses and Other Current Liabilities USD ($) | Nov. 30, 2013 Foreign currency contracts Pounds GBP (£) | Feb. 28, 2013 Foreign currency contracts Pounds GBP (£) | Feb. 28, 2013 Foreign currency contracts Pounds Prepaid Expenses and Other Current Assets USD ($) | Nov. 30, 2013 Foreign currency contracts Pounds Accrued Expenses and Other Current Liabilities USD ($) | Nov. 30, 2013 Interest rate swaps USD ($) | Feb. 28, 2013 Interest rate swaps USD ($) | Nov. 30, 2013 Interest rate swaps Accrued Expenses and Other Current Liabilities USD ($) | Feb. 28, 2013 Interest rate swaps Accrued Expenses and Other Current Liabilities USD ($) | Feb. 28, 2013 Interest rate swaps Other Liabilities, Non-current USD ($)
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Fair values of derivative instruments in the consolidated balance sheet |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional Amount, sell foreign currency |  |  |  |  | € 6,350 | € 7,050 |  |  | £ 5,250 | £ 3,000 |  |  |  |  |  |  |
Notional Amount |  |  |  |  |  |  |  |  |  |  |  |  | 75,000 | 75,000 |  |  |
Derivative assets | 496 |  |  |  |  |  | 239 |  |  |  | 257 |  |  |  |  |  |
Derivative liabilities |  | $ 2,559 | $ 3,044 | $ 1,780 |  |  |  | $ 107 |  |  |  | $ 316 |  |  | $ 2,136 | $ 3,044 | $ 1,780

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