Derivative Financial Instruments (Schedule Of Net Notional Foreign Currency Forward Contracts Outstanding) (Details) - Dec. 31, 2016 € 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	INR (₨)	DKK	GBP (£)	JPY (¥)	AUD	CNY (¥)	CHF (SFr)	HKD	BRL	SGD	EUR (€)	CAD
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Net notional foreign currency forward contracts outstanding	₨ 3,875	DKK 21,735	£ 283	¥ 685,319	AUD 8,200	¥ 48,300	SFr 37,700	HKD 32,500	BRL 8,300	SGD 9,967	€ 8,307	CAD 2,850