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Fair Value Measurements (Schedule Of Accumulated Other Comprehensive Loss - Interest Rate Swaps) (Details) (Accumulated other comprehensive loss [Member], USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2013
Accumulated other comprehensive loss [Member]
 
Derivative Instruments  
Balance at December 31, 2012 $ 48,180
Other comprehensive income (48,180)
Balance at September 30, 2013 $ 0