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Accumulated Other Comprehensive (Loss) Income (Tables)
12 Months Ended
Dec. 31, 2011
Accumulated Other Comprehensive (Loss) Income  
Schedule of accumulated other comprehensive income (loss)
 
  December 31, 2011   December 31, 2010  

Cumulative unrealized (loss) gain on available-for-sale securities

  $ (2,578 ) $ 9,828  

Effective portion of cumulative loss on cash flow hedges

    (1,420 )   (1,625 )
           

Total

  $ (3,998 ) $ 8,203