XML 77 R51.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Oasis Midstream Partners LP (Details) $ / shares in Units, MMcf / d in Millions, $ in Millions |  |  |  | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Nov. 06, 2017 MMcf / d | Sep. 25, 2017 USD ($) $ / shares shares | May 22, 2017 | Sep. 30, 2017 | Dec. 31, 2017 USD ($)
Affiliated Entity [Member] | Commercial Agreements with OPNA, Oasis Petroleum Marketing LLC (“OPM”) and OMS [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Contract term, maximum |  |  |  | 15 years |
Common Units [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Shares issued, price per share (in usd per share) | $ / shares |  | $ 17.00 |  |  |
Oasis Midstream Partners, LP [Member] | Common Units [Member] | Partnership Interest [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Common units sold in IPO (shares) |  | 7,500,000 |  |  |
Shares issued, price per share, net of underwriting discounts and commissions (in usd per share) | $ / shares |  | $ 15.98 |  |  |
Proceeds from issuance of shares in IPO | $ |  | $ 134.2 |  |  |
Net proceeds distributed to Oasis | $ |  | $ 132.1 |  |  |
Oasis Midstream Partners, LP [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Limited partner interest in OMP (percent) |  | 68.60% |  |  |
Oasis Midstream Partners, LP [Member] | Common Units [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Common units sold in IPO (shares) |  | 5,125,000 |  |  |
Oasis Midstream Partners, LP [Member] | Subordinated Units [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Common units sold in IPO (shares) |  | 13,750,000 |  |  |
Underwriters' option | Oasis Midstream Partners, LP [Member] | Common Units [Member] | Partnership Interest [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Common units sold in IPO (shares) |  | 1,125,000 |  |  |
Restricted unit awards | OMP [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Vesting period |  |  | 10 years |  |
Percentage of outstanding units (percent) |  |  | 10.00% |  |
Gas Gathering, Compression, Processing and Gas Lift Agreement [Member] | Affiliated Entity [Member] | Contract for Construction of Natural Gas Processing Plant [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Processing plant capacity (in cubic ft per day) | MMcf / d | 200 |  |  |  |
Gas Gathering, Compression, Processing and Gas Lift Agreement [Member] | Affiliated Entity [Member] | Estimated Reimbursements, Plant II [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Estimate of reimbursable amounts from OMP | $ |  |  |  |  | $ 66.7

X
- Definition General Partnership, Percentage of Outstanding Units + References No definition available. + Details
Name: | oas_GeneralPartnershipPercentageofOutstandingUnits
Namespace Prefix: | oas_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Oil and Gas Delivery Commitments and Contracts, Maximum Term + References No definition available. + Details
Name: | oas_OilandGasDeliveryCommitmentsandContractsMaximumTerm
Namespace Prefix: | oas_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Partners' Capital Account, Sale of Stock or Units, Price per Share Net + References No definition available. + Details
Name: | oas_PartnersCapitalAccountSaleofStockorUnitsPriceperShareNet
Namespace Prefix: | oas_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Processing Plant Capacity + References No definition available. + Details
Name: | oas_ProcessingPlantCapacity
Namespace Prefix: | oas_
Data Type: | us-types:flowItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
Name: | us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of units sold in a public offering of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 + Details
Name: | us-gaap_PartnersCapitalAccountUnitsSoldInPublicOffering
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash inflow associated with the amount received from entity's first offering of stock to the public. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceInitialPublicOffering
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Cash inflow received as distributions, returns of capital, or sale proceeds from partnership interests held for investment purposes. + References No definition available. + Details
Name: | us-gaap_ProceedsFromLimitedPartnershipInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of transactions with related party during the financial reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864 + Details
Name: | us-gaap_RelatedPartyTransactionAmountsOfTransaction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Per share or per unit amount of equity securities issued. + References No definition available. + Details
Name: | us-gaap_SharesIssuedPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_AffiliatedEntityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=oas_CommercialAgreementswithOPNAOasisPetroleumMarketingLLCOPMandOMSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LimitedPartnersCapitalAccountByClassAxis=oas_CommonUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=oas_OasisMidstreamPartnersLPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_PartnershipInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=oas_OasisMidstreamPartnersLPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LimitedPartnersCapitalAccountByClassAxis=oas_SubordinatedUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=us-gaap_OverAllotmentOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=oas_OMPGeneralPartnerLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OilAndGasDeliveryCommitmentsAndContractsAxis=oas_GasGatheringCompressionProcessingandGasLiftAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=oas_ContractforConstructionofNaturalGasProcessingPlantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=oas_EstimatedReimbursementsPlantIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |