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Financial Instruments (Tables)
6 Months Ended
Jun. 30, 2012
Derivative Instrument Detail [Abstract]  
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
    Fair Value Measurements Using:
  Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs
  Fair Value (Level 1) (Level 2) (Level 3)
         
Interest rate swap liability as of June 30, 2012$ 1,377$ -$ 1,377$ -