XML 61 R55.htm IDEA: XBRL DOCUMENT
v3.20.1

Long-Term Debt - Effects of Fourth Amendment (Details) - Subsequent Event | Apr. 24, 2020
--- | ---
Less than 25% |
Debt Instrument [Line Items] |
Commitment Fee Rates (percent) | 0.50%
Greater than or equal to 25% but less than 50% |
Debt Instrument [Line Items] |
Commitment Fee Rates (percent) | 0.50%
Greater than or equal to 50% but less than 75% |
Debt Instrument [Line Items] |
Commitment Fee Rates (percent) | 0.50%
Greater than or equal to 75% but less than 90% |
Debt Instrument [Line Items] |
Commitment Fee Rates (percent) | 0.50%
Greater than or equal to 90% |
Debt Instrument [Line Items] |
Commitment Fee Rates (percent) | 0.50%
Minimum | Greater than or equal to 25% but less than 50% |
Debt Instrument [Line Items] |
Commitment utilization (percent) | 25.00%
Minimum | Greater than or equal to 50% but less than 75% |
Debt Instrument [Line Items] |
Commitment utilization (percent) | 50.00%
Minimum | Greater than or equal to 75% but less than 90% |
Debt Instrument [Line Items] |
Commitment utilization (percent) | 75.00%
Minimum | Greater than or equal to 90% |
Debt Instrument [Line Items] |
Commitment utilization (percent) | 90.00%
Maximum | Less than 25% |
Debt Instrument [Line Items] |
Commitment utilization (percent) | 25.00%
Maximum | Greater than or equal to 25% but less than 50% |
Debt Instrument [Line Items] |
Commitment utilization (percent) | 50.00%
Maximum | Greater than or equal to 50% but less than 75% |
Debt Instrument [Line Items] |
Commitment utilization (percent) | 75.00%
Maximum | Greater than or equal to 75% but less than 90% |
Debt Instrument [Line Items] |
Commitment utilization (percent) | 90.00%
ABR Loans or Swingline Loans | Less than 25% | ABR or Swingline |
Debt Instrument [Line Items] |
Spread on variable rate (percent) | 0.75%
ABR Loans or Swingline Loans | Greater than or equal to 25% but less than 50% | ABR or Swingline |
Debt Instrument [Line Items] |
Spread on variable rate (percent) | 1.00%
ABR Loans or Swingline Loans | Greater than or equal to 50% but less than 75% | ABR or Swingline |
Debt Instrument [Line Items] |
Spread on variable rate (percent) | 1.25%
ABR Loans or Swingline Loans | Greater than or equal to 75% but less than 90% | ABR or Swingline |
Debt Instrument [Line Items] |
Spread on variable rate (percent) | 1.50%
ABR Loans or Swingline Loans | Greater than or equal to 90% | ABR or Swingline |
Debt Instrument [Line Items] |
Spread on variable rate (percent) | 1.75%
Swingline Loan | Less than 25% | Eurodollar |
Debt Instrument [Line Items] |
Spread on variable rate (percent) | 2.25%
Swingline Loan | Greater than or equal to 25% but less than 50% | Eurodollar |
Debt Instrument [Line Items] |
Spread on variable rate (percent) | 2.50%
Swingline Loan | Greater than or equal to 50% but less than 75% | Eurodollar |
Debt Instrument [Line Items] |
Spread on variable rate (percent) | 2.75%
Swingline Loan | Greater than or equal to 75% but less than 90% | Eurodollar |
Debt Instrument [Line Items] |
Spread on variable rate (percent) | 3.00%
Swingline Loan | Greater than or equal to 90% | Eurodollar |
Debt Instrument [Line Items] |
Spread on variable rate (percent) | 3.25%

X
- Definition Debt instrument, Covenant, Ratio Of Total Outstanding Borrowings To Borrowing Base + References No definition available. + Details
Name: | oas_DebtInstrumentCovenantRatioOfTotalOutstandingBorrowingsToBorrowingBase
Namespace Prefix: | oas_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
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_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | oas_DebtInstrumentCovenantTermsAxis=oas_DebtInstrumentCovenantTermsCommitmentUtilizationPercentageRangeOneMember
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: |

X
- Details
Name: | oas_DebtInstrumentCovenantTermsAxis=oas_DebtInstrumentCovenantTermsCommitmentUtilizationPercentageRangeTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | oas_DebtInstrumentCovenantTermsAxis=oas_DebtInstrumentCovenantTermsCommitmentUtilizationPercentageRangeThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | oas_DebtInstrumentCovenantTermsAxis=oas_DebtInstrumentCovenantTermsCommitmentUtilizationPercentageRangeFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | oas_DebtInstrumentCovenantTermsAxis=oas_DebtInstrumentCovenantTermsCommitmentUtilizationPercentageRangeFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oas_ABRLoansorSwinglineLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=oas_ABROrSwinglineRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oas_SwinglineLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_EurodollarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |