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Business Acquisitions - March 2016 Acquisition (Narratives) (Details) hp in Thousands, $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended
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Mar. 31, 2016 USD ($) customer compressor_unit hp shares | Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Business Acquisitions |  |  |  |  |  |  |  |  |  |  |  |
Payment for business acquisition |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 13,779
Merger-related costs |  | $ 169 | $ 182 | $ 5,686 | $ 4,125 | $ 275 | $ 0 | $ 0 | $ 0 | $ 10,162 | $ 275 | 0
March 2016 Acquisition |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisitions |  |  |  |  |  |  |  |  |  |  |  |
Number of customers | customer | 4 |  |  |  |  |  |  |  |  |  |  |
Number of compressor units acquired | compressor_unit | 19 |  |  |  |  |  |  |  |  |  |  |
Horsepower of compressor units acquired | hp | 23 |  |  |  |  |  |  |  |  |  |  |
Payment for business acquisition | $ 18,800 |  |  |  |  |  |  |  |  |  |  |
Long-term line of credit | $ 13,800 |  |  |  |  |  |  |  |  |  |  |
Number of like kind exchanged compressor (units) | compressor_unit | 24 |  |  |  |  |  |  |  |  |  |  |
Number of like kind exchanged compressor (units), value | $ 3,200 |  |  |  |  |  |  |  |  |  |  |
Merger-related costs |  |  |  |  |  |  |  |  |  |  |  | $ 200
Property, plant and equipment useful life | 15 years |  |  |  |  |  |  |  |  |  |  |
March 2016 Acquisition | Limited Partner Units |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisitions |  |  |  |  |  |  |  |  |  |  |  |
Partners' capital account, units distributed in acquisition (units) | shares | 257,000 |  |  |  |  |  |  |  |  |  |  |
Partners' capital account acquisition, value | $ 1,800 |  |  |  |  |  |  |  |  |  |  |
March 2016 Acquisition | General Partner |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisitions |  |  |  |  |  |  |  |  |  |  |  |
Partners' capital account, units distributed in acquisition (units) | shares | 5,205 |  |  |  |  |  |  |  |  |  |  |
General partner units interest (as a percentage) | 2.00% |  |  |  |  |  |  |  |  |  |  |

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- Definition Represents the number of compressor units acquired during the period. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + 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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585 + Details
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