XML 80 R22.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Significant Concentration | 12 Months Ended
--- | ---
Dec. 31, 2013
Risks and Uncertainties [Abstract] |
Significant Concentration | Significant Concentrations Major customers. For the years ended December 31, 2013 and 2012, sales to Musket Corporation accounted for approximately 11% and 10% of our total sales, respectively. For the year ended December 31, 2011, sales to Texon L.P., Plains All American Pipeline, L.P. and Enserco Energy Inc. accounted for approximately 18%, 16% and 15%, respectively, of our total sales. No other purchasers accounted for more than 10% of the Company’s total sales for the years ended December 31, 2013, 2012 and 2011. Total sales include revenues from the Company’s exploration and production segment only, as OWS and OMS provide services to OPNA. Substantially all of the Company’s accounts receivable result from sales of oil and natural gas as well as joint interest billings (“JIB”) to third-party companies who have working interest payment obligations in projects completed by the Company. Statoil Oil & Gas L.P. and Continental Resources Inc. accounted for approximately 15% and 10%, respectively, of the Company’s JIB receivables balance at December 31, 2013. No third-party company accounted for more than 10% of the Company’s total JIB receivables balance at December 31, 2012. This concentration of customers and joint interest owners may impact the Company’s overall credit risk, either positively or negatively, in that these entities may be similarly affected by changes in economic or other conditions. Management believes that the loss of any of these purchasers would not have a material adverse effect on the Company’s operations, as there are a number of alternative oil and natural gas purchasers in the Company’s producing regions.

X
- Definition Significant Concentration Disclosure [Text Block] + References No definition available. + Details
Name: | oas_SignificantConcentrationDisclosureTextBlock
Namespace Prefix: | oas_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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