Derivative Financial Instruments (Schedule Of Contracts Designated As Hedged Instruments) (Details) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2015 Canadian Dollars [Member] CAD	Dec. 31, 2014 Canadian Dollars [Member] CAD	Mar. 31, 2015 British Pounds [Member] GBP (£)	Dec. 31, 2014 British Pounds [Member] GBP (£)	Mar. 31, 2015 Euros [Member] EUR (€)	Dec. 31, 2014 Euros [Member] EUR (€)	Mar. 31, 2015 Swiss Francs [Member] CHF	Dec. 31, 2014 Swiss Francs [Member] CHF
Foreign Exchange Contracts [Line Items]
Foreign exchange contracts, Notional Amount	10,020	12,053	£ 2,248	£ 2,739	€ 31,510	€ 36,673	25,596	31,344
Derivative, Maturity Date	Feb. 01, 2016	Feb. 01, 2016	Feb. 01, 2016	Feb. 01, 2016	Feb. 01, 2016	Feb. 01, 2016	Feb. 01, 2016	Feb. 01, 2016