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Financial Instruments - Fair Value (Table) (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Derivative [Line Items]    
Short-term liabilities $ (1,389) $ (8,255)
Long-term liabilities 0 (4,422)
Total (1,389) (12,677)
Interest Rate Swaps
    
Derivative [Line Items]    
Short-term liabilities (1,389) (8,255)
Long-term liabilities 0 (4,422)
Total $ (1,389) $ (12,677)