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Revenue from Contracts with Customers (Tables) | 6 Months Ended
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Jun. 30, 2018
Revenue from Contract with Customer [Abstract] |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] |
| 2018 |  | 2019 |  | 2020 |  | 2021 |  | 2022 |  | Total
| (In Thousands)
Compression service contracts remaining performance obligations | $ | 1,791 |  |  | $ | 3,209 |  |  | $ | 1,027 |  |  | $ | 253 |  |  | $ | 77 |  |  | $ | 6,357 |

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- Definition Tabular disclosure of expected timing for satisfying remaining performance obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84173487&loc=SL51747714-108306 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130556-203045 + Details
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