XML 53 R39.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Revenue Recognition - Disaggregated Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Exploration and Production [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 381,708 | $ 264,884
Exploration and Production [Member] | Oil Production [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 323,386 | 208,595
Exploration and Production [Member] | Purchased Oil Sales [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 17,989 | 27,630
Exploration and Production [Member] | Natural Gas Production [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 26,961 | 19,535
Exploration and Production [Member] | Purchased Gas Sales [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 49 | 0
Exploration and Production [Member] | Natural Gas Liquid Services [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 13,323 | 9,124
Midstream Services [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 27,922 | 14,606
Midstream Services [Member] | Crude Oil and Natural Gas Services [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 18,029 | 8,551
Midstream Services [Member] | Water Services [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 9,893 | 6,055
Well Services [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 11,586 | 5,627
Well Services [Member] | Hydraulic Fracturing Services [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 10,426 | 5,156
Well Services [Member] | Equipment Rental Services [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 1,160 | $ 471

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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 32 -Paragraph 2A -URI http://asc.fasb.org/extlink&oid=82859839&loc=SL82860478-203043 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130543-203045 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130539-203045 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=82913847&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_ProductOrServiceAxis=oas_OilProductionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_ProductOrServiceAxis=oas_NaturalGasProductionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_ProductOrServiceAxis=oas_NaturalGasLiquidServicesMember
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: | us-gaap_ProductOrServiceAxis=oas_CrudeOilandNaturalGasServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | us-gaap_ProductOrServiceAxis=oas_HydraulicFracturingServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=oas_EquipmentRentalServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |