Financial Derivatives (Schedule Of Effect Of Derivative Instruments On The Statement Of Income) (Details) (Interest Rate Contract [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI net of tax on (Effective Portion)	$ 244	$ 358	$ 420
Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	Interest Expense	Interest Expense	Interest Expense
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	$ (382)	$ (525)	$ (736)
Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	Other income (expense)	Other income (expense)	Other income (expense)