Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting Information [Line Items]

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

SEGMENT BREAKDOWN BETWEEN SERVICES / PRODUCT SALES	For the Years Ended December 31,
	2017		2016		2015
Reservoir Description Services	$	393,742	$	400,034	$	487,202
Production Enhancement Services	87,776		70,225		124,752
Total Revenue - Services	$	481,518	$	470,259	$	611,954
Reservoir Description Product sales	$	21,478	$	26,171	$	27,643
Production Enhancement Product sales	156,813		98,311		157,923
Total Revenue - Product sales	$	178,291	$	124,482	$	185,566
Total Revenue	$	659,809	$	594,741	$	797,520

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 business segment results as are used to prepare our Consolidated Financial Statements. All interest and other non-operating income (expense) is attributable to Corporate & Other area and is not allocated to specific business segments. Summarized financial information concerning our segments is shown in the following table (in thousands):

	Reservoir Description		Production Enhancement		Corporate & Other (1)			Consolidated
December 31, 2017
Revenues from unaffiliated clients	$	415,220	$	244,589	$	—		$	659,809
Inter-segment revenues	294		1,185		(1,479		)	—
Segment operating income (loss)	66,500		46,459		(519		)	112,440
Total assets (at end of period)	320,569		206,389		57,854			584,812
Capital expenditures	10,406		6,819		1,550			18,775
Depreciation and amortization	17,972		4,851		2,117			24,940
December 31, 2016
Revenues from unaffiliated clients	$	426,205	$	168,536	$	—		$	594,741
Inter-segment revenue	784		877		(1,661		)	—
Segment operating income (loss)	78,881		7,198		100			86,179
Total assets (at end of period)	316,801		195,104		61,147			573,052
Capital expenditures	8,220		2,298		838			11,356
Depreciation and amortization	18,494		5,856		2,522			26,872

December 31, 2015
Revenue from unaffiliated clients	$	514,845	$	282,675	$	—		$	797,520
Inter-segment revenue	584		1,981		(2,565		)	—
Segment operating income (loss)	123,505		38,210		(645		)	161,070
Total assets (at end of period)	347,600		215,872		61,786			625,258
Capital expenditures	17,939		3,475		1,383			22,797
Depreciation and amortization	17,696		7,317		2,444			27,457
(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 table shows a summary of our U.S. and non-U.S. operations for December 31, 2017, 2016 and 2015 (in thousands):

GEOGRAPHIC INFORMATION	United States		Canada		Other Countries (1) (2)		Consolidated
December 31, 2017
Revenue	$	284,260	$	33,019	$	342,530	$	659,809
Property, plant and equipment, net	63,812		9,725		49,561		123,098
December 31, 2016
Revenue	$	224,863	$	22,547	$	347,331	$	594,741
Property, plant and equipment, net	71,388		10,497		47,997		129,882
December 31, 2015
Revenue	$	338,907	$	43,808	$	414,805	$	797,520
Property, plant and equipment, net	80,603		12,082		50,526		143,211
(1) Revenue earned in other countries, including the Netherlands, was not individually greater than 10% of our consolidated revenue in 2017, 2016 or 2015.
(2) Property, plant and equipment, net in other countries, including the Netherlands, were not individually greater than 10% of our consolidated fixed assets in 2017, 2016 or 2015.