Derivative Financial Instruments (Schedule Of Net Notional Foreign Currency Forward Contracts Outstanding) (Details) - Dec. 31, 2017 € in Thousands, ₨ in Thousands, ¥ in Thousands, ¥ in Thousands, £ in Thousands, SGD in Thousands, SFr in Thousands, HKD in Thousands, DKK in Thousands, CAD in Thousands, BRL in Thousands, AUD in Thousands	HKD	INR (₨)	DKK	GBP (£)	JPY (¥)	CNY (¥)	AUD	CHF (SFr)	BRL	SGD	EUR (€)	CAD
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Net notional foreign currency forward contracts outstanding	HKD 8,100	₨ 38,900	DKK 5,347	£ 8,800	¥ 1,508,800	¥ 69,200	AUD 14,400	SFr 15,650	BRL 5,700	SGD 13,900	€ 13,500	CAD 2,850