Financial Instruments (Schedule Of Derivative Instruments In The Consolidated Balance Sheets Utilized For Foreign Currency Risk Management Purposes) (Details) (Foreign Exchange Contract [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Mar. 31, 2011
Other Current Assets [Member] | Derivatives Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 948	$ 19,579
Other Current Assets [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	23,742	4,492
Other Current Liabilities [Member] | Derivatives Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	(24,725)	(778)
Other Current Liabilities [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ (18,269)	$ (6,122)