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Note 7 - Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2015
Notes Tables  
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]
Fair Value at
September 30
, 2015
 
Level 1
 
 
Level 2
 
 
Level 3
 
Measured on a recurring basis:
 
 
 
 
 
 
 
 
 
 
 
 
Derivative contracts, net
  $ -     $ (877 )   $ -  
                         
Measured on a
non-
recurring basis:
 
 
 
 
 
 
 
 
 
 
 
 
Equity-method investment
  $ -     $ -     $ 28,147  
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]
 
 
September 30,
201
5
 
 
December 31,
201
4
 
Carrying value
  $ 248,557     $ 257,780  
Fair value
    256,881       270,781