XML 66 R38.htm IDEA: XBRL DOCUMENT
v3.20.1

Revenue Recognition - Disaggregated Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 387,798 | $ 575,732
Exploration and Production Revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 331,387 | 527,711
Midstream services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 124,955 | 106,582
Operating Segments | Exploration and Production Revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 331,387 | 527,711
Operating Segments | Exploration and Production Revenues | Crude oil revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 212,793 | 318,120
Operating Segments | Exploration and Production Revenues | Purchased crude oil sales |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 85,757 | 147,136
Operating Segments | Exploration and Production Revenues | Natural gas and NGL revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 26,335 | 50,662
Operating Segments | Exploration and Production Revenues | Purchased natural gas sales |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 521 | 1,335
Operating Segments | Exploration and Production Revenues | NGLs |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 5,981 | 10,458
Operating Segments | Midstream services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 56,411 | 48,021
Operating Segments | Midstream services | Crude oil and natural gas revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 26,921 | 24,664
Operating Segments | Midstream services | Produced and flowback water revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 11,251 | 9,033
Operating Segments | Midstream services | Total midstream service revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 38,172 | 33,697
Operating Segments | Midstream services | Natural gas and NGL revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 16,039 | 12,797
Operating Segments | Midstream services | Freshwater revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 2,200 | 1,527
Operating Segments | Midstream services | Total midstream product revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 18,239 | $ 14,324

X
- 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
Name: | us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=oas_ExplorationAndProductionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=oas_MidstreamServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=oas_OilProductionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=oas_PurchasedOilSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=oas_NaturalGasAndNaturalGasLiquidsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=oas_PurchasedGasSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=oas_NaturalGasLiquidServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=oas_CrudeOilandNaturalGasServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=oas_ProducedandFlowbackWaterServiceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=oas_TotalMidstreamServicesProductandServicesMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=oas_NaturalGasandNGLServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=oas_WaterServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=oas_TotalMidstreamProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |