Derivative Financial Instruments (Derivative Gains Included In Accumulated Other Comprehensive Loss (AOCL) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Derivative Gains Included in AOCI [Roll Forward]
Beginning balance		$ (30,126)	$ (16,587)
Net gain (loss) on cash flow hedges	[1]	(12,478)	(15,465)
Reclassification of net loss (gain) on cash flow hedges to income	[1]	388	200
Ending balance		$ (42,216)	$ (31,852)

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