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Basis of Presentation and Significant Accounting Policies Basis of Presentation and Significant Accounting Policies - Goodwill and Impairment of Long-Lived Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Mar. 31, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016
Goodwill [Line Items] |  |  |  |  |  |
Goodwill | $ 6,636 |  | $ 6,600 | $ 6,636 |  | $ 6,636
Business Acquisitions, Purchase Price Allocation, Subsequent Years, Remaining Adjustments |  |  | 0 |  |  |
Goodwill impairment | $ 0 | $ 0 | 106,200 | $ 0 | $ 106,205 |
Other Segments [Member] |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Goodwill |  |  | 0 |  |  |
Compression Division [Member] |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Business Acquisitions, Purchase Price Allocation, Subsequent Years, Remaining Adjustments |  |  | 92,400 |  |  |
Production Testing Division [Member] |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Business Acquisitions, Purchase Price Allocation, Subsequent Years, Remaining Adjustments |  |  | $ 13,900 |  |  |
Fair Value, Measurements, Nonrecurring [Member] | Compression Division [Member] |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) |  | 7,900 |  |  |  |
Fair Value, Measurements, Nonrecurring [Member] | Production Testing Division [Member] |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) |  | 2,800 |  |  |  |
Fair Value, Measurements, Nonrecurring [Member] | Fluids Division [Member] |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) |  | $ 300 |  |  |  |

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- Definition Total remaining unamortized or unaccreted amounts of premiums, discounts, and intangible assets, in years subsequent to the year of acquisition, when the total amounts of remaining discounts, premiums, and intangible assets exceed 30 percent of stockholders' equity. + References No definition available. + Details
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- Definition Amount of unrealized (holding) gain (loss) which is included in the statement of income (or changes in net assets) related to those assets still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 + Details
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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