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Derivative Instruments (Tables)
12 Months Ended
Dec. 31, 2011
Derivative Instruments (Tables) [Abstract]  
Fair value of derivative instruments

The following is a summary of the fair value of our derivative instruments (dollars in thousands):

  Balance Sheet Fair Value
  Location December 31, 2011 December 31, 2010
Cash flow hedge interest rate swaps Other liabilities $$ 2,854 $$ 482
Impact of derivative instruments on the statement of operations and OCI

The following presents the impact of derivative instruments on the statement of operations and OCI for the periods presented (dollars in thousands):

     Year Ended
   Location December 31, 2011 December 31, 2010 December 31, 2009
Gain (loss) on interest rate swap recognized in           
 OCI (effective portion) n/a $ 3,189 $ (10,307) $ (3,513)
Gain (loss) reclassified from AOCI into           
 income (effective portion) Interest expense   1,781   (2,244)   (971)
Gain (loss) recognized in income (ineffective portion           
 and amount excluded from effectiveness testing) Realized loss   0   0   0