Derivative Financial Instruments (Derivative Gains Included In Accumulated Other Comprehensive Loss (AOCL) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Derivative Gains (Losses) Included in AOCL
Beginning balance	$ 13,627		$ 14,126
Net gain (loss) on cash flow hedges	(3,613)	[1]	(4,560)	[1]
Reclassification of net loss (gain) on cash flow hedges to income	(26)	[1]	4,367	[1]
Ending balance	$ 9,988		$ 13,933

[1] See Note 8–Derivative Financial Instruments for details of the amount of gain/loss recognized in accumulated other comprehensive loss ("AOCL") on derivatives and the amount of gain/loss reclassified from AOCL into income.