Derivative Financial Instruments (Schedule Of Net Notional Foreign Currency Forward Contracts Outstanding) (Details) In Thousands, unless otherwise specified	Mar. 31, 2013 AUD	Mar. 31, 2013 CAD	Mar. 31, 2013 CHF	Mar. 31, 2013 CNY	Mar. 31, 2013 EUR (€)	Mar. 31, 2013 GBP (£)	Mar. 31, 2013 HKD	Mar. 31, 2013 INR	Mar. 31, 2013 JPY (¥)	Mar. 31, 2013 SGD
Summary of Derivative Instruments [Abstract]
Net notional foreign currency forward contracts outstanding	16,513	5,238	14,092	5,798	€ 26,464	£ 32,481	56,583	40,146	¥ 278,299	9,316