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Note 7 - Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2015
Fair Value Disclosures [Abstract]  
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]

Fair Value at June 30, 2015

 

Level 1

   

Level 2

   

Level 3

 

Measured on a recurring basis:

                       

Derivative contracts, net

  $ -     $ (1,187 )   $ -  
                         

Measured on a non-recurring basis:

                       

Equity-method investment

  $ -     $ -     $ 34,009  

Long-lived assets held and used:

                       

Certain buildings and improvements

                    3,367  

Fair Value at December 31, 2014

 

Level 1

   

Level 2

   

Level 3

 

Measured on a recurring basis:

                       

Derivative contracts, net

  $ -     $ (1,750 )   $ -  
                         

Measured on a non-recurring basis:

                       

Equity-method investment

  $ -     $ -     $ 33,282  
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]
   

June 30,

2015

   

December 31,

2014

 

Carrying value

  $ 253,934     $ 257,780  

Fair value

    260,408       270,781