Amount of horsepower of compressor units acquired during the period.

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Represents the number of compressor units acquired during the period.

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Compressor Units Like Kind Exchange Number

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Compressor Units Like Kind Exchange, Value

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The general partner's ownership interest in partnership as a percentage.

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Number of Customers

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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.

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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.

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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.

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Change in the different classes of partners' capital accounts during the year due to acquisitions. Partners include general, limited and preferred partners.

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Change in the number of units for each class of partners' capital accounts during the year due to acquisitions. Partners include general, limited and preferred partners.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Business Acquisitions - March 2016 Acquisition (Narratives) (Details) hp in Thousands, $ in Thousands		1 Months Ended	9 Months Ended
	Mar. 01, 2016 USD ($) customer compressor_unit hp shares	Aug. 31, 2017 shares	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($) shares
Business Acquisitions
Payment for business acquisition			$ 0	$ 13,779
General Partner
Business Acquisitions
Partners' capital account, units distributed in acquisition (units) \| shares		93,163		5,205
General partner units interest (as a percentage)			2.00%
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
Transaction 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%