Derivative Financial Instruments (Schedule Of Net Notional Foreign Currency Forward Contracts Outstanding) (Details) In Thousands, unless otherwise specified	Mar. 31, 2012 AUD	Mar. 31, 2012 CAD	Mar. 31, 2012 CHF	Mar. 31, 2012 CNY	Mar. 31, 2012 EUR (€)	Mar. 31, 2012 GBP (£)	Mar. 31, 2012 HKD	Mar. 31, 2012 INR	Mar. 31, 2012 JPY (¥)	Mar. 31, 2012 SGD
Summary of Derivative Instruments [Abstract]
Net notional foreign currency forward contracts outstanding	1,844	5,566	30,740	14,627	€ 47,368	£ 26,329	49,600	529,806	¥ 53,879	8,156