Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2014	Nov. 30, 2013	Feb. 28, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax	$ 0		$ 0
Total accumulated other comprehensive loss	(15,996)		(15,996)		(1,873)
Other Comprehensive Income (Loss) Before Reclassifications			(14,169)
Reclassified From Other Comprehensive Income (Loss)			46
Other Comprehensive Income (Loss), Net of Tax	(7,695)	3,885	(14,123)	3,625
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	0		0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	278		598
Foreign Currency Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive loss	(15,548)		(15,548)		235
Other Comprehensive Income (Loss) Before Reclassifications			(15,783)
Reclassified From Other Comprehensive Income (Loss)			0
Other Comprehensive Income (Loss), Net of Tax			(15,783)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive loss	(67)		(67)		(74)
Other Comprehensive Income (Loss) Before Reclassifications			7
Reclassified From Other Comprehensive Income (Loss)			0
Other Comprehensive Income (Loss), Net of Tax			7
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive loss	(1,195)		(1,195)		(1,319)
Other Comprehensive Income (Loss) Before Reclassifications			124
Reclassified From Other Comprehensive Income (Loss)			0
Other Comprehensive Income (Loss), Net of Tax			124
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive loss	814		814		(715)
Other Comprehensive Income (Loss) Before Reclassifications			1,483
Reclassified From Other Comprehensive Income (Loss)			46
Other Comprehensive Income (Loss), Net of Tax			$ 1,529