Derivative Instruments And Hedging Activities (Fair Values Of Derivative Instruments On The Consolidated Balance Sheets) (Details) - Designated As Hedging Instrument - Interest Rate Swaps - USD ($) $ in Thousands	Nov. 30, 2017	Feb. 28, 2017
Other Current Assets
Derivatives, Fair Value [Line Items]
Assets	$ 6,072	$ 2,997
Accounts Payable
Derivatives, Fair Value [Line Items]
Liabilities	0	(509)
Other Assets
Derivatives, Fair Value [Line Items]
Assets	832	0
Other Liabilities
Derivatives, Fair Value [Line Items]
Liabilities	0	0
Assets, Total
Derivatives, Fair Value [Line Items]
Assets	6,904	2,997
Liabilities, Total
Derivatives, Fair Value [Line Items]
Liabilities	$ 0	$ (509)