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Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

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-Publisher FASB

-Name Accounting Standards Codification

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-Section S99

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

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-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

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Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Segment Reporting Revenue by Product Sales and Services (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenue from External Customer [Line Items]
Sales Revenue, Services, Net									$ 780,872us-gaap_SalesRevenueServicesNet	$ 765,428us-gaap_SalesRevenueServicesNet	$ 693,895us-gaap_SalesRevenueServicesNet
Sales Revenue, Goods, Net									304,350us-gaap_SalesRevenueGoodsNet	308,080us-gaap_SalesRevenueGoodsNet	287,185us-gaap_SalesRevenueGoodsNet
Total Revenue	278,622us-gaap_SalesRevenueNet	276,135us-gaap_SalesRevenueNet	267,562us-gaap_SalesRevenueNet	262,903us-gaap_SalesRevenueNet	276,279us-gaap_SalesRevenueNet	273,163us-gaap_SalesRevenueNet	263,139us-gaap_SalesRevenueNet	260,927us-gaap_SalesRevenueNet	1,085,222us-gaap_SalesRevenueNet	1,073,508us-gaap_SalesRevenueNet	981,080us-gaap_SalesRevenueNet
Operating Segment Reservoir Description [Member]
Revenue from External Customer [Line Items]
Sales Revenue, Services, Net									495,658	493,402	472,426
Sales Revenue, Goods, Net									23,316	28,849	23,103
Total Revenue									518,974	522,251	495,529
Operating Segment Production Enhancement [Member]
Revenue from External Customer [Line Items]
Sales Revenue, Services, Net									220,177	209,770	161,679
Sales Revenue, Goods, Net									247,400	242,645	242,113
Total Revenue									467,577	452,415	403,792
Operating Segment Reservoir Management [Member]
Revenue from External Customer [Line Items]
Sales Revenue, Services, Net									65,037	62,256	59,790
Sales Revenue, Goods, Net									33,634	36,586	21,969
Total Revenue									$ 98,671	$ 98,842	$ 81,759