Fair Value Of Financial Instruments, Derivative And Marketable Securities (Derivative Instruments, Effect On Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI	$ 3,073	$ 1,243
Amount of (Loss) Reclassified from AOCI to Income	(1,789)	(3,286)
(Loss) Recognized in Income from Ineffective portion	(438)	(485)
Interest Rate Swaps [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI	2,938	1,486
Amount of (Loss) Reclassified from AOCI to Income	(1,656)	(3,106)
(Loss) Recognized in Income from Ineffective portion	(438)	(485)
Foreign Exchange Contracts [Member] | Other Revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI	135	(243)
Amount of (Loss) Reclassified from AOCI to Income	$ (134)	$ (180)