Derivative Financial Instruments (Schedule Of Gains And Losses Related To Derivative Instruments) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2015		Jun. 30, 2014		Jun. 30, 2015		Jun. 30, 2014
Derivative [Line Items]
Other comprehensive (loss) income before reclassifications					$ (37,175)		$ 9,416
Amounts reclassified from accumulated other comprehensive loss					1,839		2,593
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Interest Expense [Member]
Derivative [Line Items]
Amounts reclassified from accumulated other comprehensive loss	$ 871	[1]	$ (1,512)	[1]	1,839	[2]	2,593	[2]
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Other comprehensive (loss) income before reclassifications	$ (197)		$ (340)		$ (469)		$ (636)

[1] (a)There were no gains or losses recognized in earnings related to any ineffective portion of hedging relationships or related to any amount excluded from the assessment of hedge effectiveness for the three months ended June 30, 2015 and 2014.

[2] (a)There were no gains or losses recognized in earnings related to any ineffective portion of hedging relationships or related to any amount excluded from the assessment of hedge effectiveness for the six months ended June 30, 2015 and 2014.