Summary Of Significant Accounting Policies (Schedule Of Accumulated Other Comprehensive Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013		Jun. 30, 2012
Increase (Decrease) In Accumulated Other Comprehensive Loss [Roll Forward]
(Gain) Loss On Cash Flow Hedges - Beginning balance			$ 7,489
(Gain) Loss On Cash Flow Hedges - Amounts reclassified from other comprehensive income			(8,350)	[1]
(Gain) Loss On Cash Flow Hedges - Net other comprensive income			(8,350)
(Gain) Loss On Cash Flow Hedges - Ending balance	(861)		(861)
Defined Benefit Pension Plan - Beginning balance			17,254
Defined Benefit Pension Plan - Amounts reclassified from other comprehensive income			(729)	[2]
Defined Benefit Pension Plan - Net other comprehensive income	(364)	0	(729)		0
Defined Benefit Pension Plan - Ending balance	16,525		16,525
Total - Beginning balance			24,743
Total - Amounts reclassified from other comprehensive income			(9,079)
Total - Net other comprehensive income	(10,165)	(514)	(9,079)		(1,189)
Total - Ending balance	$ 15,664		$ 15,664

[1] This reclassification component is included in interest expense, other assets and other liabilities (see Note 7 for additional information).

[2] This reclassification component is included in the computation of net periodic benefit cost (see Note 14 for additional information).