XML 26 R79.htm IDEA: XBRL DOCUMENT
v3.19.3

Condensed Consolidating Financial Information - Schedule of Condensed Consolidating Statement of Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Revenues |  |  |  |  |  |  |  |
Total revenues | $ 482,743 |  |  | $ 674,629 |  |  | $ 1,587,880 | $ 1,722,192
Operating expenses |  |  |  |  |  |  |  |
Lease operating expenses | 50,313 |  |  | 48,534 |  |  | 164,985 | 137,456
Marketing, transportation and gathering expenses | 32,659 |  |  | 30,713 |  |  | 96,097 | 74,559
Production taxes | 28,461 |  |  | 38,722 |  |  | 86,221 | 103,748
Depreciation, depletion and amortization | 210,832 |  |  | 162,984 |  |  | 578,023 | 465,819
Exploration expenses | 652 |  |  | 22,315 |  |  | 2,369 | 23,701
Impairment | 0 |  |  | 0 |  |  | 653 | 384,228
General and administrative expenses | 52,860 |  |  | 34,859 |  |  | 118,245 | 91,029
Total operating expenses | 473,550 |  |  | 532,453 |  |  | 1,453,473 | 1,711,659
Loss on sale of properties | (752) |  |  | 36,869 |  |  | (3,950) | 38,823
Operating income | 8,441 |  |  | 179,045 |  |  | 130,457 | 49,356
Other income (expense) |  |  |  |  |  |  |  |
Equity in earnings (loss) of subsidiaries | 0 |  |  | 0 |  |  | 0 | 0
Net gain (loss) on derivative instruments | 47,922 |  |  | (48,544) |  |  | (34,940) | (239,945)
Interest expense, net of capitalized interest | (43,897) |  |  | (39,560) |  |  | (131,551) | (117,616)
Loss on extinguishment of debt | 0 |  |  | (47) |  |  | 0 | (13,698)
Other income (expense) | 473 |  |  | 111 |  |  | 706 | 146
Total other income (expense), net | 4,498 |  |  | (88,040) |  |  | (165,785) | (371,113)
Income (loss) before income taxes | 12,939 |  |  | 91,005 |  |  | (35,328) | (321,757)
Income tax benefit (expense) | 17,372 |  |  | (24,782) |  |  | 8,835 | 75,391
Net income (loss) including non-controlling interests | 30,311 | $ 51,174 | $ (107,978) | 66,223 | $ (316,301) | $ 3,712 | (26,493) | (246,366)
Less: Net income attributable to non-controlling interests | 10,023 |  |  | 3,882 |  |  | 25,344 | 10,907
Net income (loss) attributable to Oasis | 20,288 |  |  | 62,341 |  |  | (51,837) | (257,273)
Intercompany Eliminations |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | (52,492) |  |  | (41,045) |  |  | (146,345) | (113,827)
Operating expenses |  |  |  |  |  |  |  |
Lease operating expenses | (17,054) |  |  | (14,565) |  |  | (43,529) | (38,957)
Marketing, transportation and gathering expenses | (11,750) |  |  | (6,126) |  |  | (32,123) | (17,605)
Production taxes | 0 |  |  | 0 |  |  | 0 | 0
Depreciation, depletion and amortization | (5,140) |  |  | (4,048) |  |  | (15,263) | (11,017)
Exploration expenses | 0 |  |  | 0 |  |  | 0 | 0
Impairment |  |  |  |  |  |  | 0 | 0
General and administrative expenses | (4,232) |  |  | (2,703) |  |  | (12,948) | (8,940)
Total operating expenses | (49,530) |  |  | (39,194) |  |  | (138,583) | (107,574)
Loss on sale of properties | 0 |  |  | 0 |  |  | 0 | 0
Operating income | (2,962) |  |  | (1,851) |  |  | (7,762) | (6,253)
Other income (expense) |  |  |  |  |  |  |  |
Equity in earnings (loss) of subsidiaries | (97,072) |  |  | (129,657) |  |  | (153,688) | 58,606
Net gain (loss) on derivative instruments | 0 |  |  | 0 |  |  | 0 | 0
Interest expense, net of capitalized interest | 0 |  |  | 0 |  |  | 0 | 0
Loss on extinguishment of debt |  |  |  | 0 |  |  |  | 0
Other income (expense) | 0 |  |  | 0 |  |  | 0 | 0
Total other income (expense), net | (97,072) |  |  | (129,657) |  |  | (153,688) | 58,606
Income (loss) before income taxes | (100,034) |  |  | (131,508) |  |  | (161,450) | 52,353
Income tax benefit (expense) | 0 |  |  | 0 |  |  | 0 | 0
Net income (loss) including non-controlling interests | (100,034) |  |  | (131,508) |  |  | (161,450) | 52,353
Less: Net income attributable to non-controlling interests | (13,843) |  |  | (22,577) |  |  | (43,155) | (62,168)
Net income (loss) attributable to Oasis | (86,191) |  |  | (108,931) |  |  | (118,295) | 114,521
Parent/ Issuer |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 0 |  |  | 0 |  |  | 0 | 0
Operating expenses |  |  |  |  |  |  |  |
Lease operating expenses | 0 |  |  | 0 |  |  | 0 | 0
Marketing, transportation and gathering expenses | 0 |  |  | 0 |  |  | 0 | 0
Production taxes | 0 |  |  | 0 |  |  | 0 | 0
Depreciation, depletion and amortization | 0 |  |  | 0 |  |  | 0 | 0
Exploration expenses | 0 |  |  | 0 |  |  | 0 | 0
Impairment |  |  |  |  |  |  | 0 | 0
General and administrative expenses | 569 |  |  | 7,486 |  |  | 15,964 | 22,214
Total operating expenses | 569 |  |  | 7,486 |  |  | 15,964 | 22,214
Loss on sale of properties | 0 |  |  | 0 |  |  | 0 | 0
Operating income | (569) |  |  | (7,486) |  |  | (15,964) | (22,214)
Other income (expense) |  |  |  |  |  |  |  |
Equity in earnings (loss) of subsidiaries | 54,755 |  |  | 96,555 |  |  | 39,118 | (149,295)
Net gain (loss) on derivative instruments | 0 |  |  | 0 |  |  | 0 | 0
Interest expense, net of capitalized interest | (33,133) |  |  | (32,836) |  |  | (98,424) | (98,417)
Loss on extinguishment of debt |  |  |  | (47) |  |  |  | (13,698)
Other income (expense) | 1 |  |  | 0 |  |  | 2 | 0
Total other income (expense), net | 21,623 |  |  | 63,672 |  |  | (59,304) | (261,410)
Income (loss) before income taxes | 21,054 |  |  | 56,186 |  |  | (75,268) | (283,624)
Income tax benefit (expense) | (766) |  |  | 6,155 |  |  | 23,431 | 26,351
Net income (loss) including non-controlling interests | 20,288 |  |  | 62,341 |  |  | (51,837) | (257,273)
Less: Net income attributable to non-controlling interests | 0 |  |  | 0 |  |  | 0 | 0
Net income (loss) attributable to Oasis | 20,288 |  |  | 62,341 |  |  | (51,837) | (257,273)
Combined Guarantor Subsidiaries |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 434,542 |  |  | 644,207 |  |  | 1,444,237 | 1,636,573
Operating expenses |  |  |  |  |  |  |  |
Lease operating expenses | 67,367 |  |  | 63,099 |  |  | 208,514 | 176,413
Marketing, transportation and gathering expenses | 44,409 |  |  | 36,839 |  |  | 128,220 | 92,164
Production taxes | 28,461 |  |  | 38,722 |  |  | 86,221 | 103,748
Depreciation, depletion and amortization | 206,989 |  |  | 159,843 |  |  | 566,812 | 456,624
Exploration expenses | 652 |  |  | 22,315 |  |  | 2,369 | 23,701
Impairment |  |  |  |  |  |  | 653 | 384,228
General and administrative expenses | 48,944 |  |  | 24,627 |  |  | 91,121 | 60,259
Total operating expenses | 481,632 |  |  | 531,707 |  |  | 1,446,253 | 1,706,045
Loss on sale of properties | (752) |  |  | 36,869 |  |  | (3,950) | 38,823
Operating income | (47,842) |  |  | 149,369 |  |  | (5,966) | (30,649)
Other income (expense) |  |  |  |  |  |  |  |
Equity in earnings (loss) of subsidiaries | 42,317 |  |  | 33,102 |  |  | 114,570 | 90,689
Net gain (loss) on derivative instruments | 47,922 |  |  | (48,544) |  |  | (34,940) | (239,945)
Interest expense, net of capitalized interest | (6,252) |  |  | (6,561) |  |  | (20,658) | (18,591)
Loss on extinguishment of debt |  |  |  | 0 |  |  |  | 0
Other income (expense) | 472 |  |  | 126 |  |  | 708 | 161
Total other income (expense), net | 84,459 |  |  | (21,877) |  |  | 59,680 | (167,686)
Income (loss) before income taxes | 36,617 |  |  | 127,492 |  |  | 53,714 | (198,335)
Income tax benefit (expense) | 18,138 |  |  | (30,937) |  |  | (14,596) | 49,040
Net income (loss) including non-controlling interests | 54,755 |  |  | 96,555 |  |  | 39,118 | (149,295)
Less: Net income attributable to non-controlling interests | 0 |  |  | 0 |  |  | 0 | 0
Net income (loss) attributable to Oasis | 54,755 |  |  | 96,555 |  |  | 39,118 | (149,295)
Combined Non-guarantor |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 100,693 |  |  | 71,467 |  |  | 289,988 | 199,446
Operating expenses |  |  |  |  |  |  |  |
Lease operating expenses | 0 |  |  | 0 |  |  | 0 | 0
Marketing, transportation and gathering expenses | 0 |  |  | 0 |  |  | 0 | 0
Production taxes | 0 |  |  | 0 |  |  | 0 | 0
Depreciation, depletion and amortization | 8,983 |  |  | 7,189 |  |  | 26,474 | 20,212
Exploration expenses | 0 |  |  | 0 |  |  | 0 | 0
Impairment |  |  |  |  |  |  | 0 | 0
General and administrative expenses | 7,579 |  |  | 5,449 |  |  | 24,108 | 17,496
Total operating expenses | 40,879 |  |  | 32,454 |  |  | 129,839 | 90,974
Loss on sale of properties | 0 |  |  | 0 |  |  | 0 | 0
Operating income | 59,814 |  |  | 39,013 |  |  | 160,149 | 108,472
Other income (expense) |  |  |  |  |  |  |  |
Equity in earnings (loss) of subsidiaries | 0 |  |  | 0 |  |  | 0 | 0
Net gain (loss) on derivative instruments | 0 |  |  | 0 |  |  | 0 | 0
Interest expense, net of capitalized interest | (4,512) |  |  | (163) |  |  | (12,469) | (608)
Loss on extinguishment of debt |  |  |  | 0 |  |  |  | 0
Other income (expense) | 0 |  |  | (15) |  |  | (4) | (15)
Total other income (expense), net | (4,512) |  |  | (178) |  |  | (12,473) | (623)
Income (loss) before income taxes | 55,302 |  |  | 38,835 |  |  | 147,676 | 107,849
Income tax benefit (expense) | 0 |  |  | 0 |  |  | 0 | 0
Net income (loss) including non-controlling interests | 55,302 |  |  | 38,835 |  |  | 147,676 | 107,849
Less: Net income attributable to non-controlling interests | 23,866 |  |  | 26,459 |  |  | 68,499 | 73,075
Net income (loss) attributable to Oasis | 31,436 |  |  | 12,376 |  |  | 79,177 | 34,774
Oil and gas revenues |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 344,470 |  |  | 454,195 |  |  | 1,070,256 | 1,218,639
Oil and gas revenues | Intercompany Eliminations |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 368 |  |  | 0 |  |  | 368 | 0
Oil and gas revenues | Parent/ Issuer |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 0 |  |  | 0 |  |  | 0 | 0
Oil and gas revenues | Combined Guarantor Subsidiaries |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 344,102 |  |  | 454,195 |  |  | 1,069,888 | 1,218,639
Oil and gas revenues | Combined Non-guarantor |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 0 |  |  | 0 |  |  | 0 | 0
Purchased oil and gas |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 79,352 |  |  | 172,985 |  |  | 337,212 | 368,758
Operating expenses |  |  |  |  |  |  |  |
Expenses | 78,655 |  |  | 174,269 |  |  | 338,221 | 374,442
Purchased oil and gas | Intercompany Eliminations |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 0 |  |  | 0 |  |  | 0 | 0
Operating expenses |  |  |  |  |  |  |  |
Expenses | 0 |  |  | (60) |  |  | 0 | (60)
Purchased oil and gas | Parent/ Issuer |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 0 |  |  | 0 |  |  | 0 | 0
Operating expenses |  |  |  |  |  |  |  |
Expenses | 0 |  |  | 0 |  |  | 0 | 0
Purchased oil and gas | Combined Guarantor Subsidiaries |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 79,352 |  |  | 172,985 |  |  | 337,212 | 368,758
Operating expenses |  |  |  |  |  |  |  |
Expenses | 78,655 |  |  | 174,329 |  |  | 338,221 | 374,502
Purchased oil and gas | Combined Non-guarantor |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 0 |  |  | 0 |  |  | 0 | 0
Operating expenses |  |  |  |  |  |  |  |
Expenses | 0 |  |  | 0 |  |  | 0 | 0
Midstream Services |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 50,023 |  |  | 31,187 |  |  | 149,617 | 88,451
Operating expenses |  |  |  |  |  |  |  |
Expenses | 12,967 |  |  | 8,652 |  |  | 47,064 | 24,325
Midstream Services | Intercompany Eliminations |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | (52,860) |  |  | (41,045) |  |  | (146,713) | (113,827)
Operating expenses |  |  |  |  |  |  |  |
Expenses | (11,354) |  |  | (11,692) |  |  | (34,720) | (30,995)
Midstream Services | Parent/ Issuer |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 0 |  |  | 0 |  |  | 0 | 0
Operating expenses |  |  |  |  |  |  |  |
Expenses | 0 |  |  | 0 |  |  | 0 | 0
Midstream Services | Combined Guarantor Subsidiaries |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 2,190 |  |  | 765 |  |  | 6,342 | 2,832
Operating expenses |  |  |  |  |  |  |  |
Expenses | 4 |  |  | 528 |  |  | 2,527 | 2,054
Midstream Services | Combined Non-guarantor |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 100,693 |  |  | 71,467 |  |  | 289,988 | 199,446
Operating expenses |  |  |  |  |  |  |  |
Expenses | 24,317 |  |  | 19,816 |  |  | 79,257 | 53,266
Well Services |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 8,898 |  |  | 16,262 |  |  | 30,795 | 46,344
Operating expenses |  |  |  |  |  |  |  |
Expenses | 6,151 |  |  | 11,405 |  |  | 21,595 | 32,352
Well Services | Intercompany Eliminations |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 0 |  |  | 0 |  |  | 0 | 0
Operating expenses |  |  |  |  |  |  |  |
Expenses | 0 |  |  | 0 |  |  | 0 | 0
Well Services | Parent/ Issuer |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 0 |  |  | 0 |  |  | 0 | 0
Operating expenses |  |  |  |  |  |  |  |
Expenses | 0 |  |  | 0 |  |  | 0 | 0
Well Services | Combined Guarantor Subsidiaries |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 8,898 |  |  | 16,262 |  |  | 30,795 | 46,344
Operating expenses |  |  |  |  |  |  |  |
Expenses | 6,151 |  |  | 11,405 |  |  | 21,595 | 32,352
Well Services | Combined Non-guarantor |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |
Total revenues | 0 |  |  | 0 |  |  | 0 | 0
Operating expenses |  |  |  |  |  |  |  |
Expenses | $ 0 |  |  | $ 0 |  |  | $ 0 | $ 0

X
- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its consolidated subsidiaries. + References No definition available. + Details
Name: | oas_EquityInEarningsInSubsidiaries
Namespace Prefix: | oas_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a),(d)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
Name: | us-gaap_CostOfGoodsAndServicesSold
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total costs of sales and operating expenses for the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
Name: | us-gaap_CostsAndExpenses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CostsAndExpensesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
Name: | us-gaap_DepreciationDepletionAndAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + Details
Name: | us-gaap_DerivativeGainLossOnDerivativeNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Exploration expenses (including prospecting) related to oil and gas producing entities and would be included in operating expenses of that entity. Costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: (i) Costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or "G&G" costs. (ii) Costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, and the maintenance of land and lease records. (iii) Dry hole contributions and bottom hole contributions. (iv) Costs of drilling and equipping exploratory wells. (v) Costs of drilling exploratory-type stratigraphic test wells. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 23 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62136-109447 + Details
Name: | us-gaap_ExplorationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of gain (loss) on sale or disposal of oil and gas property or timber property. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
Name: | us-gaap_GainLossOnSaleOfProperty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
Name: | us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
Name: | us-gaap_GeneralAndAdministrativeExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -Section 35 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66906256&loc=d3e66150-109466 + Details
Name: | us-gaap_ImpairmentOfOilAndGasProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324 + Details
Name: | us-gaap_IncomeTaxExpenseBenefit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of the cost of borrowed funds accounted for as interest expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (210.5-03(11)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.9) -URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260 + Details
Name: | us-gaap_InterestExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(22)) -URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669625-108580 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(18)) -URI http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(20)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
Name: | us-gaap_NetIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of Net Income (Loss) attributable to noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669625-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=116874947&loc=SL4591551-111686 + Details
Name: | us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
Name: | us-gaap_NonoperatingIncomeExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_NonoperatingIncomeExpenseAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
Name: | us-gaap_OperatingIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918638-209977 + Details
Name: | us-gaap_OperatingLeaseExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of income (expense) related to nonoperating activities, classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
Name: | us-gaap_OtherNonoperatingIncomeExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition A tax assessed on oil and gas production. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(2)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
Name: | us-gaap_ProductionTaxExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669625-108580 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=116874947&loc=SL4591551-111686 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3000-108585 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4569616-111683 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599 Reference 10: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=116874947&loc=SL4591552-111686 + Details
Name: | us-gaap_ProfitLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Includes the cost to prepare and move liquid hydrocarbons and natural gas to their points of sale. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 23 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62136-109447 + Details
Name: | us-gaap_ResultsOfOperationsTransportationCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RevenuesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ConsolidationItemsAxis=srt_ConsolidationEliminationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_GuarantorSubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_NonGuarantorSubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_OilAndGasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_OilAndGasPurchasedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=oas_MidstreamServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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