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DERIVATIVES AND HEDGING ACTIVITIES (Tables)
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2011
Derivative Instruments And Hedging Activities Disclosure Abstract  
Schedule of derivatives outstanding 
Type      Fixed  
Of Notional Effective LIBOR Expiration
Hedge Amount Date Rate Date
  (amounts      
  (in millions)      
          
Swap $ 100.0 May 28, 2008 3.62% May 28, 2012
Schedule of derivatives expired 
Nine Months Ended September 30, 2011
Type        Fixed  
Of Notional Effective   LIBOR Expiration
Hedge Amount Date Collar Rate Date
  (amounts        
  (in millions)        
            
Swap $ 150.0 January 28, 2008 n/a 3.03% January 28, 2011
Collar   100.0 February 28, 2008[Cap 4.00%]February 28, 2011
   Floor 2.14%
Swap 0 125.0 March 28, 2008 n/a 2.91% September 28, 2011
    375.0        
            
Nine Months Ended September 30, 2010
Type        Fixed  
Of Notional Effective   LIBOR Expiration
Hedge Amount Date Collar Rate Date
  (amounts        
  (in millions)        
            
Swap $ 75.0 January 28, 2008 n/a 3.03% January 28, 2010
Schedule of the gains (losses) related to the Company's cash flow hedge
  Three Months Ended
  September 30,
Description 2011  2010
  (amounts in thousands)
      
Type Of Derivative Designated As A Cash Flow Hedge  Interest Rate Interest Rate
Amount Of Gain (Loss) Recognized In Other      
Comprehensive Income (Loss) ("OCI") $ 1,679 $ 1,424
Location Of Gain (Loss) Reclassified From OCI To      
Statement Of Operations Interest Expense Interest Expense
Amount Of Gain (Loss) Reclassified From OCI To      
Statement Of Operations $ - $ -
Location Of Gain (Loss) In Statement Of Operations Interest Expense Interest Expense
Amount Of Gain (Loss) In Statement Of Operations      
Due To Ineffectiveness $ - $ -
  Nine Months Ended
  September 30,
Description 2011 2010
  (amounts in thousands)
      
Type Of Derivative Designated As A Cash Flow Hedge  Interest Rate Interest Rate
Amount Of Gain (Loss) Recognized In Other      
Comprehensive Income (Loss) ("OCI") $ 5,129 $ 3,159
Location Of Gain (Loss) Reclassified From OCI To      
Statement Of Operations Interest Expense Interest Expense
Amount Of Gain (Loss) Reclassified From OCI To      
Statement Of Operations $ - $ -
Location Of Gain (Loss) In Statement Of Operations Interest Expense Interest Expense
Amount Of Gain (Loss) In Statement Of Operations      
Due To Ineffectiveness $ - $ -
Schedule of accumulated derivative gain (loss) recorded in the statements of other comprehensive income (loss) 
 Fair Value Of Accumulated
 Derivatives Outstanding
 September 30, December 31,
 2011 2010
 Assets (Liabilities)
 (amounts in thousands)
      
Beginning balance as of January 1$ (7,277) $ (13,432)
Net unrealized gain (loss) on derivatives,     
net of taxes (benefit)  9,174   6,155
Ending balance$ 1,897 $ (7,277)
      
Schedule of the fair value of the derivatives outstanding 
   Fair Value
   September 30, December 31,
 Balance Sheet 2011 2010
 Location Asset (Liability)
   (amounts in thousands)
Designated Derivatives       
Interest rate hedge transactionsCurrent liabilities $ (2,148) $ (2,958)
Interest rate hedge transactionsOther long-term liabilities $ - $ (4,319)