Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2012

Segment Reporting [Abstract]

Revenue from External Customers by Products and Services [Table Text Block]

Summarized external revenue by services and product sales type is shown in the following table (in thousands):

	For the Years Ended December 31,
	2012		2011		2010
Reservoir Description Services	$	472,426	$	443,050	$	403,443
Production Enhancement Services	161,679		129,400		122,046
Reservoir Management Services	59,790		49,302		42,731
Total Revenue - Services	$	693,895	$	621,752	$	568,220
Reservoir Description Product sales	$	23,103	$	26,725	$	22,386
Production Enhancement Product sales	242,113		242,049		191,910
Reservoir Management Product sales	21,969		17,122		12,137
Total Revenue - Product sales	$	287,185	$	285,896	$	226,433
Total Revenue	$	981,080	$	907,648	$	794,653

Schedule of Segment Reporting Information, by Segment [Table Text Block]

Results for these business segments are presented below. We use the same accounting policies to prepare our b

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

The following is a summary of our U.S. and non-U.S. operations for December 31, 2012, 2011 and 2010 (in thousands):

GEOGRAPHIC INFORMATION	United States		Canada		Other Countries (1) (2)		Consolidated
December 31, 2012
Revenue	$	505,200	$	101,387	$	374,493	$	981,080
Total fixed assets	66,092		17,263		42,063		125,418
December 31, 2011
Revenue	$	470,600	$	85,287	$	351,761	$	907,648
Total fixed assets	53,566		20,113		41,616		115,295
December 31, 2010
Revenue	$	406,823	$	72,296	$	315,534	$	794,653
Total fixed assets	50,160		14,396		39,667		104,223
(1) Revenue earned in other countries, including The Netherlands, was not individually greater than 10% of our consolidated revenue in 2012, 2011 or 2010.
(2) Fixed assets in other countries, including The Netherlands, were not individually greater than 10% of our consolidated fixed assets in 2012, 2011 or 2010.