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Goodwill
 12 Months Ended
Dec. 31, 2014
Goodwill [Abstract]  
Goodwill Disclosure [Text Block]
GOODWILL

The changes in the carrying amount of goodwill for each reportable segment for the years ended December 31, 2014, and 2013 were as follows (in thousands):
 
Reservoir
Description
 
Production Enhancement
 
Reservoir Management
 
Total
 
 
 
 
 
 
 
 
Balance at December 31, 2012
$
80,932

 
$
79,560

 
$
2,845

 
$
163,337

Goodwill acquired during the year
—

 
—

 
—

 
—

Balance at December 31, 2013
80,932

 
79,560

 
2,845

 
163,337

Goodwill acquired during the year
1,127

 
—

 
—

 
1,127

Balance at December 31, 2014
$
82,059

 
$
79,560

 
$
2,845

 
$
164,464