Derivative Financial Instruments (Schedule Of Contracts Designated As Hedged Instruments) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Canadian Dollars [Member]
Foreign Exchange Contracts [Line Items]
Foreign exchange contracts, Notional Amount	$ 1,062	$ 10,499
Derivative, Maturity Date	Feb. 01, 2014	Feb. 01, 2014
Norwegian Kroners [Member]
Foreign Exchange Contracts [Line Items]
Foreign exchange contracts, Notional Amount	9,253	7,131
Derivative, Maturity Date	Aug. 01, 2014	Feb. 01, 2014
British Pounds [Member]
Foreign Exchange Contracts [Line Items]
Foreign exchange contracts, Notional Amount	2,626	1,452
Derivative, Maturity Date	Feb. 01, 2015	Feb. 01, 2014
Euros [Member]
Foreign Exchange Contracts [Line Items]
Foreign exchange contracts, Notional Amount	20,772	17,186
Derivative, Maturity Date	Feb. 01, 2015	Feb. 01, 2014
Swiss Francs [Member]
Foreign Exchange Contracts [Line Items]
Foreign exchange contracts, Notional Amount	30,698	23,838
Derivative, Maturity Date	Feb. 01, 2015	Feb. 01, 2014
Japanese Yen [Member]
Foreign Exchange Contracts [Line Items]
Foreign exchange contracts, Notional Amount	792,696
Derivative, Maturity Date	Feb. 01, 2015
Swedish Kronor [Member]
Foreign Exchange Contracts [Line Items]
Foreign exchange contracts, Notional Amount	$ 6,034
Derivative, Maturity Date	Feb. 01, 2015