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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2015
Fair Value Measurements [Abstract]  
Fair value measurements
The following tables list the Company's assets and liabilities that are measured at fair value and their classification within the fair value hierarchy as of September 30, 2015 and December 31, 2014:

         
  
(In thousands)
 
    
Fair Value Measurements at September 30, 2015 Using
 
         
Description
 
September 30, 2015
  
(Level 1)
  
(Level 2)
  
(Level 3)
 
         
Commodity risk management assets
 
$
1,002
  
$
--
  
$
1,002
  
$
--
 
Available for sale securities
 
$
258
  
$
20
  
$
--
  
$
238
 
                 
Total assets
 
$
1,260
  
$
20
  
$
1,002
  
$
238
 
                 
Commodity risk management liability
 
$
--
  
$
--
  
$
--
  
$
--
 
Executive retirement program liability
  
786
  
$
--
  
$
--
  
$
786
 
                 
Total liabilities
 
$
786
  
$
--
  
$
--
  
$
786
 
                 
      
Fair Value Measurements at December 31, 2014 Using
 
                 
Description
 
December 31. 2014
  
(Level 1)
  
(Level 2)
  
(Level 3)
 
                 
Available for sale securities
 
$
25
  
$
25
  
$
--
  
$
--
 
                 
Total assets
 
$
25
  
$
25
  
$
--
  
$
--
 
                 
Executive retirement program liability
 
$
1,309
  
$
--
  
$
--
  
$
1,309
 
                 
Total liabilities
 
$
1,309
  
$
--
  
$
--
  
$
1,309