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Financial Instruments and Risk Management - Derivative FV (Details)
€ in Thousands, £ in Thousands, $ in Thousands
Feb. 28, 2018
GBP (£)
Feb. 28, 2018
EUR (€)
Feb. 28, 2018
USD ($)
Feb. 28, 2017
GBP (£)
Feb. 28, 2017
EUR (€)
Feb. 28, 2017
USD ($)
Fair values of derivative instruments in the consolidated balance sheet            
Long-term debt     $ 289,869     $ 485,615
Senior Notes            
Fair values of derivative instruments in the consolidated balance sheet            
Long-term debt           19,763
Interest rate (as a percent) 3.90% 3.90% 3.90%      
Prepaid Expenses and Other Current Assets            
Fair values of derivative instruments in the consolidated balance sheet            
Derivative assets     $ 922     2,135
Other Assets            
Fair values of derivative instruments in the consolidated balance sheet            
Derivative assets     2,201     32
Accrued Expenses and Other Current Liability            
Fair values of derivative instruments in the consolidated balance sheet            
Derivative liabilities     1,833     47
Other Liabilities, Non-current            
Fair values of derivative instruments in the consolidated balance sheet            
Derivative liabilities     773      
Designated as hedging instruments | Prepaid Expenses and Other Current Assets            
Fair values of derivative instruments in the consolidated balance sheet            
Derivative assets     922     1,430
Designated as hedging instruments | Other Assets            
Fair values of derivative instruments in the consolidated balance sheet            
Derivative assets     2,201     32
Designated as hedging instruments | Accrued Expenses and Other Current Liability            
Fair values of derivative instruments in the consolidated balance sheet            
Derivative liabilities     1,833     47
Designated as hedging instruments | Foreign currency contracts | Sell | Euros            
Fair values of derivative instruments in the consolidated balance sheet            
Notional Amount | €   € 38,000     € 27,500  
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           727
Designated as hedging instruments | Foreign currency contracts | Sell | Euros | Other Assets            
Fair values of derivative instruments in the consolidated balance sheet            
Derivative assets     102      
Designated as hedging instruments | Foreign currency contracts | Sell | Euros | Accrued Expenses and Other Current Liability            
Fair values of derivative instruments in the consolidated balance sheet            
Derivative liabilities     1,320      
Designated as hedging instruments | Foreign currency contracts | Sell | Canadian Dollars            
Fair values of derivative instruments in the consolidated balance sheet            
Notional Amount     27,750     26,000
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     378     155
Designated as hedging instruments | Foreign currency contracts | Sell | Canadian Dollars | Other Assets            
Fair values of derivative instruments in the consolidated balance sheet            
Derivative assets     101     32
Designated as hedging instruments | Foreign currency contracts | Sell | Pounds            
Fair values of derivative instruments in the consolidated balance sheet            
Notional Amount | £ £ 19,500     £ 13,500    
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           548
Designated as hedging instruments | Foreign currency contracts | Sell | Pounds | Other Assets            
Fair values of derivative instruments in the consolidated balance sheet            
Derivative assets     56      
Designated as hedging instruments | Foreign currency contracts | Sell | Pounds | Accrued Expenses and Other Current Liability            
Fair values of derivative instruments in the consolidated balance sheet            
Derivative liabilities     513      
Designated as hedging instruments | Foreign currency contracts | Sell | Mexican Pesos            
Fair values of derivative instruments in the consolidated balance sheet            
Notional Amount     20,000     59,600
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     5      
Designated as hedging instruments | Foreign currency contracts | Sell | Mexican Pesos | Accrued Expenses and Other Current Liability            
Fair values of derivative instruments in the consolidated balance sheet            
Derivative liabilities           47
Designated as hedging instruments | Interest rate swaps            
Fair values of derivative instruments in the consolidated balance sheet            
Notional Amount     100,000      
Designated as hedging instruments | Interest rate swaps | Prepaid Expenses and Other Current Assets            
Fair values of derivative instruments in the consolidated balance sheet            
Derivative assets     539      
Designated as hedging instruments | Interest rate swaps | Other Assets            
Fair values of derivative instruments in the consolidated balance sheet            
Derivative assets     1,942      
Not designated under hedge accounting | Other Liabilities, Non-current            
Fair values of derivative instruments in the consolidated balance sheet            
Derivative liabilities     773      
Not designated under hedge accounting | Cross currency debt swaps | Euros            
Fair values of derivative instruments in the consolidated balance sheet            
Notional Amount     5,280     10,000
Not designated under hedge accounting | Cross currency debt swaps | Euros | Prepaid Expenses and Other Current Assets            
Fair values of derivative instruments in the consolidated balance sheet            
Derivative assets           $ 705
Not designated under hedge accounting | Cross currency debt swaps | Euros | Other Liabilities, Non-current            
Fair values of derivative instruments in the consolidated balance sheet            
Derivative liabilities     208      
Not designated under hedge accounting | Cross currency debt swaps | Pounds            
Fair values of derivative instruments in the consolidated balance sheet            
Notional Amount     6,395      
Not designated under hedge accounting | Cross currency debt swaps | Pounds | Other Liabilities, Non-current            
Fair values of derivative instruments in the consolidated balance sheet            
Derivative liabilities     $ 565