XML 76 R65.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Commitments and Contingencies - Additional Information (Details) bbl in Millions, Mcf in Millions | Mar. 23, 2017 USD ($) | Nov. 06, 2018 USD ($) bbl Mcf | Sep. 30, 2018 USD ($) bbl Mcf
--- | --- | --- | ---
Loss Contingencies [Line Items] |  |  |
Estimable future commitments under agreements | $ |  |  | $ 550,500,000
Mirada Litigation [Member] | Pending Litigation [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Damages sought (in excess of) | $ | $ 100,000,000 |  |
Crude Oil [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Minimum quantity to be delivered or transported |  |  | 50.9
Natural Gas Liquids [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Minimum quantity to be delivered or transported |  |  | 43.5
Natural Gas [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Minimum quantity to be delivered or transported | Mcf |  |  | 901.3
Produced Water [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Minimum quantity to be delivered or transported |  |  | 30.8
Subsequent Event [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Estimable future commitments under agreements | $ |  | $ 650,200,000 |
Subsequent Event [Member] | Crude Oil [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Minimum quantity to be delivered or transported |  | 50.9 |
Subsequent Event [Member] | Natural Gas Liquids [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Minimum quantity to be delivered or transported |  | 43.5 |
Subsequent Event [Member] | Natural Gas [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Minimum quantity to be delivered or transported | Mcf |  | 901.3 |
Subsequent Event [Member] | Produced Water [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Minimum quantity to be delivered or transported |  | 30.8 |

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

X
- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyDamagesSoughtValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total amount of product committed to be supplied under existing contracts or agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1207 -Paragraph (a) -Subparagraph (2) + Details
Name: | us-gaap_OilAndGasDeliveryCommitmentsAndContractsRemainingContractualVolume
Namespace Prefix: | us-gaap_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | instant

X
- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
Name: | us-gaap_OtherCommitment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | srt_LitigationCaseAxis=oas_MiradaLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EnergyAxis=us-gaap_CrudeOilMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EnergyAxis=srt_NaturalGasLiquidsReservesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EnergyAxis=srt_NaturalGasReservesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EnergyAxis=oas_ProducedWaterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |