Goodwill

12 Months Ended

Dec. 31, 2016

Goodwill [Abstract]

Goodwill Disclosure [Text Block]

The changes in the carrying amount of goodwill for each reportable segment for the years ended December 31, 2016, and 2015 were as follows (in thousands):

	Reservoir Description		Production Enhancement		ReservoirManagement		Total
Balance at December 31, 2014	$	82,059	$	79,560	$	2,845	$	164,464
Goodwill acquired during the year	13,695		—		—		13,695
Balance at December 31, 2015	95,754		79,560		2,845		178,159
Goodwill acquired during the year	885		—		—		885
Balance at December 31, 2016	$	96,639	$	79,560	$	2,845	$	179,044