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Condensed Consolidating Financial Information - Schedule of Condensed Consolidating Statement of Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2018 | Mar. 31, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Revenues |  |  |  |  |  |
Total revenues | $ 529,405 |  | $ 573,751 |  | $ 1,105,137 | $ 1,047,563
Operating expenses |  |  |  |  |  |
Lease operating expenses | 56,228 |  | 44,141 |  | 114,672 | 88,922
Marketing, transportation and gathering expenses | 28,488 |  | 22,833 |  | 63,438 | 43,846
Production taxes | 28,142 |  | 34,026 |  | 57,760 | 65,026
Depreciation, depletion and amortization | 177,358 |  | 153,570 |  | 367,191 | 302,835
Exploration expenses | 887 |  | 617 |  | 1,717 | 1,386
Impairment | 24 |  | 384,135 |  | 653 | 384,228
General and administrative expenses | 30,926 |  | 28,230 |  | 65,385 | 56,170
Total operating expenses | 457,557 |  | 818,379 |  | 979,923 | 1,179,206
Loss on sale of properties | (276) |  | 1,954 |  | (3,198) | 1,954
Operating income (loss) | 71,572 |  | (242,674) |  | 122,016 | (129,689)
Other income (expense) |  |  |  |  |  |
Equity in earnings of subsidiaries | 0 |  | 0 |  | 0 | 0
Net gain (loss) on derivative instruments | 34,749 |  | (120,285) |  | (82,862) | (191,401)
Interest expense, net of capitalized interest | (43,186) |  | (40,910) |  | (87,654) | (78,056)
Loss on extinguishment of debt | 0 |  | (13,651) |  | 0 | (13,651)
Other income (expense) | 279 |  | 218 |  | 233 | 35
Total other expense, net | (8,158) |  | (174,628) |  | (170,283) | (283,073)
Income (loss) before income taxes | 63,414 |  | (417,302) |  | (48,267) | (412,762)
Income tax benefit (expense) | (12,240) |  | 101,001 |  | (8,537) | 100,173
Net income (loss) including non-controlling interests | 51,174 | $ (107,978) | (316,301) | $ 3,712 | (56,804) | (312,589)
Less: Net income attributable to non-controlling interests | 8,417 |  | 3,903 |  | 15,321 | 7,025
Net income (loss) attributable to Oasis | 42,757 |  | (320,204) |  | (72,125) | (319,614)
Intercompany Eliminations |  |  |  |  |  |
Revenues |  |  |  |  |  |
Total revenues | (47,153) |  | (38,133) |  | (93,853) | (72,782)
Operating expenses |  |  |  |  |  |
Lease operating expenses | (13,134) |  | (13,474) |  | (26,475) | (24,392)
Marketing, transportation and gathering expenses | (10,086) |  | (5,820) |  | (20,373) | (11,479)
Production taxes | 0 |  | 0 |  | 0 | 0
Depreciation, depletion and amortization | (4,958) |  | (3,643) |  | (10,123) | (6,969)
Exploration expenses | 0 |  | 0 |  | 0 | 0
Impairment | 0 |  | 0 |  | 0 | 0
General and administrative expenses | (4,543) |  | (3,117) |  | (8,716) | (6,237)
Total operating expenses | (44,053) |  | (35,480) |  | (89,053) | (68,380)
Loss on sale of properties | 0 |  | 0 |  | 0 | 0
Operating income (loss) | (3,100) |  | (2,653) |  | (4,800) | (4,402)
Other income (expense) |  |  |  |  |  |
Equity in earnings of subsidiaries | (111,373) |  | 247,085 |  | (56,616) | 188,263
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 expense, net | (111,373) |  | 247,085 |  | (56,616) | 188,263
Income (loss) before income taxes | (114,473) |  | 244,432 |  | (61,416) | 183,861
Income tax benefit (expense) | 0 |  | 0 |  | 0 | 0
Net income (loss) including non-controlling interests | (114,473) |  | 244,432 |  | (61,416) | 183,861
Less: Net income attributable to non-controlling interests | (14,420) |  | (21,139) |  | (29,312) | (39,591)
Net income (loss) attributable to Oasis | (100,053) |  | 265,571 |  | (32,104) | 223,452
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 |  | 0 | 0
General and administrative expenses | 6,308 |  | 7,496 |  | 15,395 | 14,728
Total operating expenses | 6,308 |  | 7,496 |  | 15,395 | 14,728
Loss on sale of properties | 0 |  | 0 |  | 0 | 0
Operating income (loss) | (6,308) |  | (7,496) |  | (15,395) | (14,728)
Other income (expense) |  |  |  |  |  |
Equity in earnings of subsidiaries | 73,855 |  | (278,014) |  | (15,637) | (245,850)
Net gain (loss) on derivative instruments | 0 |  | 0 |  | 0 | 0
Interest expense, net of capitalized interest | (32,415) |  | (33,135) |  | (65,291) | (65,581)
Loss on extinguishment of debt |  |  | (13,651) |  |  | (13,651)
Other income (expense) | 1 |  | 0 |  | 1 | 0
Total other expense, net | 41,441 |  | (324,800) |  | (80,927) | (325,082)
Income (loss) before income taxes | 35,133 |  | (332,296) |  | (96,322) | (339,810)
Income tax benefit (expense) | 7,624 |  | 12,092 |  | 24,197 | 20,196
Net income (loss) including non-controlling interests | 42,757 |  | (320,204) |  | (72,125) | (319,614)
Less: Net income attributable to non-controlling interests | 0 |  | 0 |  | 0 | 0
Net income (loss) attributable to Oasis | 42,757 |  | (320,204) |  | (72,125) | (319,614)
Combined Guarantor Subsidiaries |  |  |  |  |  |
Revenues |  |  |  |  |  |
Total revenues | 478,914 |  | 545,326 |  | 1,009,695 | 992,366
Operating expenses |  |  |  |  |  |
Lease operating expenses | 69,362 |  | 57,615 |  | 141,147 | 113,314
Marketing, transportation and gathering expenses | 38,574 |  | 28,653 |  | 83,811 | 55,325
Production taxes | 28,142 |  | 34,026 |  | 57,760 | 65,026
Depreciation, depletion and amortization | 173,754 |  | 150,554 |  | 359,823 | 296,781
Exploration expenses | 887 |  | 617 |  | 1,717 | 1,386
Impairment | 24 |  | 384,135 |  | 653 | 384,228
General and administrative expenses | 21,352 |  | 17,954 |  | 42,177 | 35,632
Total operating expenses | 450,906 |  | 817,473 |  | 964,621 | 1,174,338
Loss on sale of properties | (276) |  | 1,954 |  | (3,198) | 1,954
Operating income (loss) | 27,732 |  | (270,193) |  | 41,876 | (180,018)
Other income (expense) |  |  |  |  |  |
Equity in earnings of subsidiaries | 37,518 |  | 30,929 |  | 72,253 | 57,587
Net gain (loss) on derivative instruments | 34,749 |  | (120,285) |  | (82,862) | (191,401)
Interest expense, net of capitalized interest | (6,562) |  | (7,592) |  | (14,406) | (12,030)
Loss on extinguishment of debt |  |  | 0 |  |  | 0
Other income (expense) | 282 |  | 218 |  | 236 | 35
Total other expense, net | 65,987 |  | (96,730) |  | (24,779) | (145,809)
Income (loss) before income taxes | 93,719 |  | (366,923) |  | 17,097 | (325,827)
Income tax benefit (expense) | (19,864) |  | 88,909 |  | (32,734) | 79,977
Net income (loss) including non-controlling interests | 73,855 |  | (278,014) |  | (15,637) | (245,850)
Less: Net income attributable to non-controlling interests | 0 |  | 0 |  | 0 | 0
Net income (loss) attributable to Oasis | 73,855 |  | (278,014) |  | (15,637) | (245,850)
Combined Non-guarantor |  |  |  |  |  |
Revenues |  |  |  |  |  |
Total revenues | 97,644 |  | 66,558 |  | 189,295 | 127,979
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 | 8,562 |  | 6,659 |  | 17,491 | 13,023
Exploration expenses | 0 |  | 0 |  | 0 | 0
Impairment | 0 |  | 0 |  | 0 | 0
General and administrative expenses | 7,809 |  | 5,897 |  | 16,529 | 12,047
Total operating expenses | 44,396 |  | 28,890 |  | 88,960 | 58,520
Loss on sale of properties | 0 |  | 0 |  | 0 | 0
Operating income (loss) | 53,248 |  | 37,668 |  | 100,335 | 69,459
Other income (expense) |  |  |  |  |  |
Equity in earnings of subsidiaries | 0 |  | 0 |  | 0 | 0
Net gain (loss) on derivative instruments | 0 |  | 0 |  | 0 | 0
Interest expense, net of capitalized interest | (4,209) |  | (183) |  | (7,957) | (445)
Loss on extinguishment of debt |  |  | 0 |  |  | 0
Other income (expense) | (4) |  | 0 |  | (4) | 0
Total other expense, net | (4,213) |  | (183) |  | (7,961) | (445)
Income (loss) before income taxes | 49,035 |  | 37,485 |  | 92,374 | 69,014
Income tax benefit (expense) | 0 |  | 0 |  | 0 | 0
Net income (loss) including non-controlling interests | 49,035 |  | 37,485 |  | 92,374 | 69,014
Less: Net income attributable to non-controlling interests | 22,837 |  | 25,042 |  | 44,633 | 46,616
Net income (loss) attributable to Oasis | 26,198 |  | 12,443 |  | 47,741 | 22,398
Oil and gas revenues |  |  |  |  |  |
Revenues |  |  |  |  |  |
Total revenues | 357,004 |  | 397,849 |  | 725,786 | 764,444
Oil and gas revenues | Intercompany Eliminations |  |  |  |  |  |
Revenues |  |  |  |  |  |
Total revenues | 0 |  | 0 |  | 0 | 0
Oil and gas revenues | Parent/ Issuer |  |  |  |  |  |
Revenues |  |  |  |  |  |
Total revenues | 0 |  | 0 |  | 0 | 0
Oil and gas revenues | Combined Guarantor Subsidiaries |  |  |  |  |  |
Revenues |  |  |  |  |  |
Total revenues | 357,004 |  | 397,849 |  | 725,786 | 764,444
Oil and gas revenues | Combined Non-guarantor |  |  |  |  |  |
Revenues |  |  |  |  |  |
Total revenues | 0 |  | 0 |  | 0 | 0
Purchased oil and gas |  |  |  |  |  |
Revenues |  |  |  |  |  |
Total revenues | 109,389 |  | 128,064 |  | 257,860 | 195,773
Operating expenses |  |  |  |  |  |
Expenses | 109,662 |  | 129,579 |  | 259,566 | 200,173
Purchased oil and gas | Intercompany Eliminations |  |  |  |  |  |
Revenues |  |  |  |  |  |
Total revenues | 0 |  | 0 |  | 0 | 0
Operating expenses |  |  |  |  |  |
Expenses | 0 |  | 0 |  | 0 | 0
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 | 109,389 |  | 128,064 |  | 257,860 | 195,773
Operating expenses |  |  |  |  |  |
Expenses | 109,662 |  | 129,579 |  | 259,566 | 200,173
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 | 51,573 |  | 29,342 |  | 99,594 | 57,264
Operating expenses |  |  |  |  |  |
Expenses | 17,368 |  | 7,688 |  | 34,097 | 15,673
Midstream Services | Intercompany Eliminations |  |  |  |  |  |
Revenues |  |  |  |  |  |
Total revenues | (47,153) |  | (38,133) |  | (93,853) | (72,782)
Operating expenses |  |  |  |  |  |
Expenses | (11,332) |  | (9,426) |  | (23,366) | (19,303)
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 | 1,082 |  | 917 |  | 4,152 | 2,067
Operating expenses |  |  |  |  |  |
Expenses | 675 |  | 780 |  | 2,523 | 1,526
Midstream Services | Combined Non-guarantor |  |  |  |  |  |
Revenues |  |  |  |  |  |
Total revenues | 97,644 |  | 66,558 |  | 189,295 | 127,979
Operating expenses |  |  |  |  |  |
Expenses | 28,025 |  | 16,334 |  | 54,940 | 33,450
Well Services |  |  |  |  |  |
Revenues |  |  |  |  |  |
Total revenues | 11,439 |  | 18,496 |  | 21,897 | 30,082
Operating expenses |  |  |  |  |  |
Expenses | 8,474 |  | 13,560 |  | 15,444 | 20,947
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 | 11,439 |  | 18,496 |  | 21,897 | 30,082
Operating expenses |  |  |  |  |  |
Expenses | 8,474 |  | 13,560 |  | 15,444 | 20,947
Well Services | Combined Non-guarantor |  |  |  |  |  |
Revenues |  |  |  |  |  |
Total revenues | 0 |  | 0 |  | 0 | 0
Operating expenses |  |  |  |  |  |
Expenses | $ 0 |  | $ 0 |  | $ 0 | $ 0

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- 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
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