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Business Acquisitions - April 2014 MidCon Acquisition (Narratives) (Details) hp in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Apr. 10, 2014 USD ($) compressor_unit hp shares | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Dec. 04, 2015 USD ($)
Business Acquisitions |  |  |  |  |
Purchase consideration |  | $ 0 | $ 494,755,000 | $ 0 |
Principle amount of senior notes |  |  |  |  | $ 350,000,000.0
April 2014 MidCon Acquisition |  |  |  |  |
Business Acquisitions |  |  |  |  |
Number of compressor units acquired (compressor units) | compressor_unit | 337 |  |  |  |
Horsepower of compressor units acquired (horsepower) | hp | 444 |  |  |  |
Purchase consideration | $ 352,900,000 |  |  |  |
Issuance of common units to the public (in units) | shares | 6,200,000 |  |  |  |
Contract operations services agreement term | 7 years |  |  |  |
Transaction costs |  |  | $ 1,500,000 |  |
Property, plant and equipment useful life | 25 years |  |  |  |
April 2014 MidCon Acquisition | ASLP |  |  |  |  |
Business Acquisitions |  |  |  |  |
Purchase consideration | $ 7,700,000 |  |  |  |
April 2014 MidCon Acquisition | Partnership's 6% senior notes due 2022 |  |  |  |  |
Business Acquisitions |  |  |  |  |
Principle amount of senior notes | $ 350,000,000.0 |  |  |  |
Interest rate (as a percent) | 6.00% |  |  |  |

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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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