Derivatives and Hedging (Summary Of Cash Flow Interest Rate Contract Hedging Activity) (Details) (Cash Flow Hedging [Member], Interest Rate Contracts [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Gain) Loss Recognized in Other Comprehensive Income on Derivative (Effective Portion)	$ (131)	$ (6,423)	$ 123
Interest Expense, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion)	(1,682)	(2,537)	(2,650)
Amount of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	$ (370)	$ 238	$ 0