Derivative Financial Instruments (Effects Of The Derivative Contracts On Consolidated Statements Of Operations) (Details) (Derivatives In Cash Flow Hedging Relationships [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Recognized in OCI on Derivative Instruments (Effective Portion)	$ (41,960)	$ (31,913)
Cost Of ATM Operating Revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion)	$ (23,506)	$ (25,053)