Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2011

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,
	2011		2010		2009
Reservoir Description Services	$	443,050	$	403,443	$	395,374
Production Enhancement Services	129,400		122,046		97,569
Reservoir Management Services	49,302		42,731		36,580
Total Revenue - Services	$	621,752	$	568,220	$	529,523
Reservoir Description Product sales	$	26,725	$	22,386	$	19,560
Production Enhancement Product sales	242,049		191,910		133,083
Reservoir Management Product sales	17,122		12,137		13,373
Total Revenue - Product sales	$	285,896	$	226,433	$	166,016
Total Revenue	$	907,648	$	794,653	$	695,539

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

Summarized financial information concerning our segments is shown in the following table (in thousands):

	Reservoir Description		Production Enhancement		Reservoir Management		Corporate & Other (1)			Consolidated
December 31, 2011
Revenue from unaffiliated clients	$	469,775	$	371,449	$	66,424	$	—		$	907,648
Inter-segment revenue	1,515		1,947		1,686		(5,148		)	—
Segment income (loss)	116,244		112,576		21,887		47			250,754
Total assets	267,559		242,419		23,208		71,953			605,139
Capital expenditures	15,320		8,700		1,318		4,589			29,927
Depreciation and amortization	14,073		6,449		666		2,115			23,303
December 31, 2010
Revenue from unaffiliated clients	$	425,829	$	313,956	$	54,868	$	—		$	794,653
Inter-segment revenue	1,817		1,681		1,625		(5,123		)	—
Segment income (loss)	106,179		101,241		19,759		(253		)	226,926
Total assets	267,621		196,802		24,313		161,505			650,241
Capital expenditures	20,495		5,066		591		1,417			27,569
Depreciation and amortization	13,988		6,442		713		1,970			23,113

December 31, 2009
Revenue from unaffiliated clients	$	414,934	$	230,652	$	49,953	$	—		$	695,539
Inter-segment revenue	1,076		1,424		1,866		(4,366		)	—
Segment income (loss)	106,421		65,076		14,620		665			186,782
Total assets	251,671		173,117		25,073		208,305			658,166
Capital expenditures	12,311		3,383		247		1,348			17,289
Depreciation and amortization	14,334		5,858		700		2,926			23,818
(1)"Corporate and other" represents those items that are not directly relating to a particular segment and eliminations.

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, 2011, 2010 and 2009 (in thousands):

GEOGRAPHIC INFORMATION	United States		Canada		Other Countries		Consolidated
December 31, 2011
Revenue	$	470,600	$	85,287	$	351,761	$	907,648
Operating income	157,267		27,651		65,836		250,754
Total assets	321,756		73,385		209,998		605,139
December 31, 2010
Revenue	$	406,823	$	72,296	$	315,534	$	794,653
Operating income	126,726		34,152		66,048		226,926
Total assets	355,269		69,260		225,712		650,241
December 31, 2009
Revenue	$	339,235	$	54,888	$	301,416	$	695,539
Operating income	112,158		14,430		60,194		186,782
Total assets	326,223		45,344		286,599		658,166