Segment Reporting Level 3 (Tables)

6 Months Ended

Jun. 30, 2011

Segment Reporting [Abstract]

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

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

(Unaudited)	Reservoir Description		Production Enhancement		Reservoir Management		Corporate & Other 1			Consolidated
Three Months Ended June 30, 2011
Revenues from unaffiliated customers	$	118,758	$	88,787	$	18,240	$	—		$	225,785
Inter-segment revenues	447		357		595		(1,399		)	—
Segment operating income	26,629		24,500		7,307		(633		)	57,803
Total assets	272,298		208,114		19,146		52,675			552,233
Capital expenditures	4,079		2,499		284		743			7,605
Depreciation and amortization	3,517		1,578		169		541			5,805
Three Months Ended June 30, 2010
Revenues from unaffiliated customers	$	106,528	$	79,717	$	12,657	$	—		$	198,902
Inter-segment revenues	248		419		427		(1,094		)	—
Segment operating income (loss)	25,074		26,152		3,672		(1,178		)	53,720
Total assets	258,759		190,512		14,245		189,145			652,661
Capital expenditures	4,600		720		219		1,002			6,541
Depreciation and amortization	3,523		1,626		166		451			5,766
Six Months Ended June 30, 2011
Revenues from unaffiliated customers	$	226,379	$	170,885	$	35,254	$	—		$	432,518
Inter-segment revenues	816		665		954		(2,435		)	—
Segment operating income (loss)	53,067		47,762		13,971		(498		)	114,302
Total assets	272,298		208,114		19,146		52,675			552,233
Capital expenditures	7,382		3,303		391		908			11,984
Depreciation and amortization	6,999		3,217		349		1,071			11,636
Six Months Ended June 30, 2010
Revenues from unaffiliated customers	$	210,621	$	148,561	$	28,057	$	—		$	387,239
Inter-segment revenues	548		713		715		(1,976		)	—
Segment operating income (loss)	50,215		47,095		9,292		(1,469		)	105,133
Total assets	258,759		190,512		14,245		189,145			652,661
Capital expenditures	9,929		1,392		257		1,118			12,696
Depreciation and amortization	7,030		3,249		324		917			11,520