Financial Instruments and Risk Management - Derivative FV (Details) € in Thousands, £ in Thousands, $ in Thousands	May 31, 2018 GBP (£)	May 31, 2018 EUR (€)	May 31, 2018 USD ($)	Feb. 28, 2018 GBP (£)	Feb. 28, 2018 EUR (€)	Feb. 28, 2018 USD ($)
Fair values of derivative instruments in the consolidated balance sheet
Long-term debt			$ 300,123			$ 289,869
Prepaid Expenses and Other Current Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets			2,865			922
Other Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets			2,264			2,201
Accrued Expenses and Other Current Liability
Fair values of derivative instruments in the consolidated balance sheet
Derivative liabilities						1,833
Other Liabilities, Non-current
Fair values of derivative instruments in the consolidated balance sheet
Derivative liabilities			361			773
Designated as hedging instruments | Prepaid Expenses and Other Current Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets			2,865			922
Designated as hedging instruments | Other Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets			2,253			2,201
Designated as hedging instruments | Accrued Expenses and Other Current Liability
Fair values of derivative instruments in the consolidated balance sheet
Derivative liabilities						1,833
Designated as hedging instruments | Foreign currency contracts | Sell | Euros
Fair values of derivative instruments in the consolidated balance sheet
Notional Amount | €		€ 29,500			€ 38,000
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			1,181
Designated as hedging instruments | Foreign currency contracts | Sell | Euros | Other Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets			128			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			21,250			27,750
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			579			378
Designated as hedging instruments | Foreign currency contracts | Sell | Canadian Dollars | Other Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets			18			101
Designated as hedging instruments | Foreign currency contracts | Sell | Pounds
Fair values of derivative instruments in the consolidated balance sheet
Notional Amount | £	£ 17,500			£ 19,500
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			591
Designated as hedging instruments | Foreign currency contracts | Sell | Pounds | Other Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets			102			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			20,000
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			99			5
Designated as hedging instruments | Interest rate swaps
Fair values of derivative instruments in the consolidated balance sheet
Notional Amount			100,000			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			415			539
Designated as hedging instruments | Interest rate swaps | Other Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets			2,005			1,942
Not designated under hedge accounting | Other Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets			11
Not designated under hedge accounting | Other Liabilities, Non-current
Fair values of derivative instruments in the consolidated balance sheet
Derivative liabilities			361			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			5,280
Not designated under hedge accounting | Cross currency debt swaps | Euros | Other Assets
Fair values of derivative instruments in the consolidated balance sheet
Derivative assets			11
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			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			$ 361			$ 565