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Financial Instruments and Risk Management - Derivative FV (Details) - Designated as cash flow hedging instruments € in Thousands, £ in Thousands, $ in Thousands | May. 31, 2015 CAD | May. 31, 2015 GBP (£) | May. 31, 2015 EUR (€) | May. 31, 2015 USD ($) | Feb. 28, 2015 GBP (£) | Feb. 28, 2015 EUR (€) | Feb. 28, 2015 USD ($)
--- | --- | --- | --- | --- | --- | --- | ---
Prepaid Expenses and Other Current Assets |  |  |  |  |  |  |
Fair values of derivative instruments in the consolidated balance sheet |  |  |  |  |  |  |
Derivative assets |  |  |  | $ 158 |  |  | $ 129
Accrued Expenses and Other Current Liability |  |  |  |  |  |  |
Fair values of derivative instruments in the consolidated balance sheet |  |  |  |  |  |  |
Derivative liabilities |  |  |  | 121 |  |  | 240
Foreign currency contracts | Sell | Euros |  |  |  |  |  |  |
Fair values of derivative instruments in the consolidated balance sheet |  |  |  |  |  |  |
Notional Amount | € |  |  | € 11,000 |  |  | € 10,000 |
Foreign currency contracts | Sell | Euros | Prepaid Expenses and Other Current Assets |  |  |  |  |  |  |
Fair values of derivative instruments in the consolidated balance sheet |  |  |  |  |  |  |
Derivative assets |  |  |  | 15 |  |  | 129
Foreign currency contracts | Sell | Pounds |  |  |  |  |  |  |
Fair values of derivative instruments in the consolidated balance sheet |  |  |  |  |  |  |
Notional Amount | £ |  | £ 5,700 |  |  | £ 6,900 |  |
Foreign currency contracts | Sell | Pounds | Accrued Expenses and Other Current Liability |  |  |  |  |  |  |
Fair values of derivative instruments in the consolidated balance sheet |  |  |  |  |  |  |
Derivative liabilities |  |  |  | 121 |  |  | $ 240
Foreign currency contracts | Sell | Canadian |  |  |  |  |  |  |
Fair values of derivative instruments in the consolidated balance sheet |  |  |  |  |  |  |
Notional Amount | CAD | CAD 13,250 |  |  |  |  |  |
Foreign currency contracts | Sell | Canadian | Prepaid Expenses and Other Current Assets |  |  |  |  |  |  |
Fair values of derivative instruments in the consolidated balance sheet |  |  |  |  |  |  |
Derivative assets |  |  |  | $ 143 |  |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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