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Fair Value Measurements and Interest Rate Swaps (Tables)
9 Months Ended
Sep. 30, 2011
Fair Value Measurements and Interest Rate Swaps [Abstract] 
Estimated fair value of swap agreements
The table below presents the estimated fair value of our swap agreements (in thousands):
 
   
Unrealized Losses
at September 30,
 
Balance Sheet Line Item
   
2011
   
2010
 
Accrued expenses and other current liabilities
 
$
(1,104
)
$
(4,167
)