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PRICE RISK MANAGEMENT ASSETS AND LIABILITIES Derivative Instruments (Tables)
6 Months Ended
Jun. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Derivative Instruments, Gain (Loss) [Table Text Block]
The following table summarizes the location and amount (excluding income tax effects) of derivative instrument gains and losses reported in the Company’s consolidated financial statements:
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
2015
 
2014
 
2015
 
2014
Economic Hedges:
 
 
 
 
 
 
 

Interest rate contracts:
 
 
 
 
 
 
 
Increase in interest expense
$

 
$
4

 
$

 
$
7