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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2014
Fair Value Measurements [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
The fair value hierarchy for our financial assets accounted for at fair value on a recurring basis at September 30, 2014 and December 31, 2013 was as follows (in thousands):
 
 
As of September 30, 2014
 
 
Level 1
 
Level 2
 
Level 3
 
Total
Assets
 
 
 
 
 
 
 
 
Interest rate derivatives
 
$

 
$
45

 
$

 
$
45

Commodity derivatives
 

 
168

 

 
168

     Total assets
 

 
213

 

 
213

Liabilities
 
 
 
 
 
 
 


Commodity derivatives
 

 
(45
)
 

 
(45
)
Net assets
 
$

 
$
168

 
$

 
$
168

 
 
As of December 31, 2013
 
 
Level 1
 
Level 2
 
Level 3
 
Total
Assets
 
 
 
 
 
 
 
 
Interest rate derivatives
 
$

 
$
116

 
$

 
$
116