Derivative Financial Instruments (Schedule Of Net Notional Foreign Currency Forward Contracts Outstanding) (Details) - Mar. 31, 2018 € in Thousands, ₩ in Thousands, ₨ in Thousands, ¥ in Thousands, ¥ in Thousands, £ in Thousands, kr in Thousands, SFr in Thousands, R$ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands	KRW (₩)	EUR (€)	DKK (kr)	GBP (£)	JPY (¥)	CHF (SFr)	AUD ($)	HKD ($)	BRL (R$)	SGD ($)	INR (₨)	CAD ($)	CNY (¥)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Net notional foreign currency forward contracts outstanding	₩ 2,357,000	€ 4,836	kr 28,262	£ 4,900	¥ 2,275,000	SFr 21,750	$ 8,000	$ 9,100	R$ 18,000	$ 9,400	₨ 282,000	$ 1,850	¥ 40,577