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Long-Lived Asset Impairment - Narratives (Details) hp in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	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 ($) hp	Dec. 31, 2017 USD ($) hp	Dec. 31, 2016 USD ($) hp
Impaired Long-Lived Assets Held and Used
Long-lived asset impairment	$ 9,804	$ 6,660	$ 6,953	$ 4,710	$ 8,284	$ 7,105	$ 5,508	$ 8,245	$ 28,127	$ 29,142	$ 87,435
Corporate Office Relocation
Impaired Long-Lived Assets Held and Used
Remaining lease and relocation cost									$ 0	2,113
Asset Write Off | Corporate Office Relocation
Impaired Long-Lived Assets Held and Used
Remaining lease and relocation cost										$ 795
Idle compressor units
Impaired Long-Lived Assets Held and Used
Horsepower of idle compressor units retired from the active fleet (horsepower) | hp									115	100	262
Physical Asset Observations And Other Events
Impaired Long-Lived Assets Held and Used
Long-lived asset impairment										$ 2,900
Horsepower of idle compressor units retired from the active fleet (horsepower) | hp										7

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- Definition

The capacity of long-lived assets that the entity determined to retire and either sell or re-utilize key components, expressed in horsepower.

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- Definition

Relocation Expenses Incurred

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228

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