Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments (Summary Of Derivative Instruments By Hedge Designation) (Details)

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Derivative Financial Instruments (Summary Of Derivative Instruments By Hedge Designation) (Details) (USD $)
In Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Derivative Financial Instruments [Abstract]        
Realized loss reclassified from accumulated other comprehensive loss to interest expense     $ (9,841) $ (5,353)
Realized loss reclassified to interest expense     9,841 5,353
Unrealized loss from changes in the fair value of the effective portion of the interest rate swaps     (7,952) (6,225)
Gain (loss) included in other comprehensive (loss) income $ (866) $ 112 $ 1,889 $ (872)