Financial Instruments and Risk Management (Details 4) (Cash flow hedges, USD $) In Thousands, unless otherwise specified	3 Months Ended
	May 31, 2012	May 31, 2011
Pre-tax effect of derivative instruments
Gain/ (Loss) Recognized in OCI (effective portion)	$ 866	$ (2,929)
Gain/ (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income	(900)	(1,670)
Gain/ (Loss) Recognized as Income	35	(63)
Currency contracts
Pre-tax effect of derivative instruments
Gain/ (Loss) Recognized in OCI (effective portion)	910	(487)
Gain/ (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income	26	(144)
Gain/ (Loss) Recognized as Income	35	(63)
Gain/ (Loss) recorded in AOCI to be reclassified into income over the next year	380
Interest rate swaps
Pre-tax effect of derivative instruments
Gain/ (Loss) Recognized in OCI (effective portion)	(44)	(2,442)
Gain/ (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income	(926)	(1,526)
Gain/ (Loss) recorded in AOCI to be reclassified into income over the next year	$ (3,460)