Goodwill (Tables)

12 Months Ended

Dec. 31, 2013

Goodwill [Line Items]

Schedule of Goodwill [Table Text Block]

The changes in the carrying amount of goodwill for each reportable segment for the years ended December 31, 2013, and 2012 were as follows (in thousands):

	Reservoir Description		Production Enhancement		ReservoirManagement		Total
Balance at December 31, 2011	$	80,932	$	79,010	$	2,845	$	162,787
Goodwill acquired during the year	—		550		—		550
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