Financial Instruments and Risk Management - Derivative FV (Details) € in Thousands, £ in Thousands, MXN in Thousands, CAD in Thousands, AUD in Thousands, $ in Thousands	Nov. 30, 2016 MXN	Nov. 30, 2016 GBP (£)	Nov. 30, 2016 EUR (€)	Nov. 30, 2016 CAD	Nov. 30, 2016 AUD	Nov. 30, 2016 USD ($)	Feb. 29, 2016 GBP (£)	Feb. 29, 2016 EUR (€)	Feb. 29, 2016 CAD	Feb. 29, 2016 AUD	Feb. 29, 2016 USD ($)
Fair values of derivative instruments in the consolidated balance sheet
Long-term debt						$ 564,902					$ 619,914
3.90% unsecured Senior Notes payable
Fair values of derivative instruments in the consolidated balance sheet
Long-term debt						$ 39,692					39,496
Interest rate (as a percent)	3.90%	3.90%	3.90%	3.90%	3.90%	3.90%
Prepaid Expenses and Other Current Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets						$ 2,506					1,166
Other Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets						875					206
Accrued Expenses and Other Current Liability
Fair values of derivative instruments in the consolidated balance sheet
Derivative liabilities						169					495
Designated as hedging instruments | Prepaid Expenses and Other Current Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets						2,506
Designated as hedging instruments | Other Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets						141
Designated as hedging instruments | Accrued Expenses and Other Current Liability
Fair values of derivative instruments in the consolidated balance sheet
Derivative liabilities						169
Designated as hedging instruments | Foreign currency contracts | Prepaid Expenses and Other Current Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets											1,166
Designated as hedging instruments | Foreign currency contracts | Accrued Expenses and Other Current Liability
Fair values of derivative instruments in the consolidated balance sheet
Derivative liabilities											495
Designated as hedging instruments | Foreign currency contracts | Sell | Euros
Fair values of derivative instruments in the consolidated balance sheet
Notional Amount | €			€ 15,750					€ 27,000
Designated as hedging instruments | Foreign currency contracts | Sell | Euros | Prepaid Expenses and Other Current Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets						1,186					1,066
Designated as hedging instruments | Foreign currency contracts | Sell | Euros | Other Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets						140
Designated as hedging instruments | Foreign currency contracts | Sell | Canadian Dollars
Fair values of derivative instruments in the consolidated balance sheet
Notional Amount | CAD				CAD 19,000					CAD 28,000
Designated as hedging instruments | Foreign currency contracts | Sell | Canadian Dollars | Prepaid Expenses and Other Current Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets						48
Designated as hedging instruments | Foreign currency contracts | Sell | Canadian Dollars | Other Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets						1
Designated as hedging instruments | Foreign currency contracts | Sell | Canadian Dollars | Accrued Expenses and Other Current Liability
Fair values of derivative instruments in the consolidated balance sheet
Derivative liabilities						164					495
Designated as hedging instruments | Foreign currency contracts | Sell | Pounds
Fair values of derivative instruments in the consolidated balance sheet
Notional Amount | £		£ 6,150					£ 3,450
Designated as hedging instruments | Foreign currency contracts | Sell | Pounds | Prepaid Expenses and Other Current Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets						1,224					94
Designated as hedging instruments | Foreign currency contracts | Sell | Mexican Pesos
Fair values of derivative instruments in the consolidated balance sheet
Notional Amount | MXN	MXN 9,600
Designated as hedging instruments | Foreign currency contracts | Sell | Mexican Pesos | Prepaid Expenses and Other Current Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets						48
Designated as hedging instruments | Foreign currency contracts | Sell | Australian Dollars
Fair values of derivative instruments in the consolidated balance sheet
Notional Amount | AUD					AUD 250					AUD 1,650
Designated as hedging instruments | Foreign currency contracts | Sell | Australian Dollars | Prepaid Expenses and Other Current Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets											6
Designated as hedging instruments | Foreign currency contracts | Sell | Australian Dollars | Accrued Expenses and Other Current Liability
Fair values of derivative instruments in the consolidated balance sheet
Derivative liabilities						5
Not designated under hedge accounting | Foreign currency contracts
Fair values of derivative instruments in the consolidated balance sheet
Notional Amount											5
Not designated under hedge accounting | Foreign currency contracts | Other Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets											$ 206
Not designated under hedge accounting | Cross currency debt swaps
Fair values of derivative instruments in the consolidated balance sheet
Notional Amount						$ 10,000
Not designated under hedge accounting | Cross currency debt swaps | 3.90% unsecured Senior Notes payable
Fair values of derivative instruments in the consolidated balance sheet
Interest rate (as a percent)	3.90%	3.90%	3.90%	3.90%	3.90%	3.90%
Not designated under hedge accounting | Cross currency debt swaps | Other Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets						$ 734