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Business Acquisitions - August 2014 MidCon Acquisition (Narratives) (Details) hp in Thousands, $ in Thousands |  | 12 Months Ended
--- | --- | ---
Aug. 08, 2014 USD ($) compressor_unit hp | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Business Acquisitions |  |  |  |
Purchase consideration |  | $ 0 | $ 494,755 | $ 0
Goodwill |  | $ 0 | 3,738 |
August 2014 MidCon Acquisition |  |  |  |
Business Acquisitions |  |  |  |
Number of compressor units acquired (compressor units) | compressor_unit | 162 |  |  |
Horsepower of compressor units acquired (horsepower) | hp | 110 |  |  |
Purchase consideration | $ 130,100 |  |  |
Transaction costs |  |  | $ 1,000 |
Estimated useful life | 24 years |  |  |
Goodwill | $ 3,738 |  |  |
August 2014 MidCon Acquisition | ASLP |  |  |  |
Business Acquisitions |  |  |  |
Purchase consideration | $ 4,100 |  |  |
August 2014 MidCon Acquisition | BHP Billiton |  |  |  |
Business Acquisitions |  |  |  |
Contract operations services agreement term | 5 years |  |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e1043-128460 + 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 -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 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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