Derivative Financial Instruments (Derivative Gains Included In Accumulated Other Comprehensive Loss (AOCL) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Derivative Gains Included in AOCI [Roll Forward]
Beginning balance		$ (29,528)	$ 9,835	$ (16,587)	$ 13,627	$ 13,627
Net gain (loss) on cash flow hedges	[1]	(3,410)	(1,830)	(16,939)	(5,443)
Reclassification of net loss (gain) on cash flow hedges to income	[1]	388	119	976	(60)
Ending balance		$ (32,550)	$ 8,124	$ (32,550)	$ 8,124	$ (16,587)

[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.