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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2018
Accounting Policies [Abstract] |
Impact of Revision of Prior Period Financial Statements on Consolidated Financial Statements | For the year ended December 31, 2017, the revision did not impact the Company’s cash flows from operations, and the impacts to the Company's Consolidated Statement of Operations and Consolidated Balance Sheet were as follows:
| Year Ended December 31, 2017
| As Reported |  | Revision |  | As Revised
| (In thousands, except share data)
Oil and gas revenues | $ | 1,034,892 |  |  | $ | (258 | ) |  | $ | 1,034,634 |
Purchased oil and gas sales | 87,989 |  |  | 45,553 |  |  | 133,542 |
Total revenues | 1,248,424 |  |  | 45,295 |  |  | 1,293,719 |
Purchased oil and gas expenses | 89,320 |  |  | 45,295 |  |  | 134,615 |
Total operating expenses | 1,106,230 |  |  | 45,295 |  |  | 1,151,525 |
Net income attributable to Oasis | 123,796 |  |  | — |  |  | 123,796 |
Earnings attributable to Oasis per share: |  |  |  |  |  |
Basic | $ | 0.53 |  |  | $ | — |  |  | $ | 0.53 |
Diluted | $ | 0.52 |  |  | $ | — |  |  | $ | 0.52 |
Accounts receivable, net | $ | 363,580 |  |  | $ | 7,799 |  |  | $ | 371,379 |
Total current assets | 407,835 |  |  | 7,799 |  |  | 415,634 |
Total assets | 6,615,130 |  |  | 7,799 |  |  | 6,622,929 |
Accrued liabilities | 236,480 |  |  | 7,799 |  |  | 244,279 |
Total current liabilities | 623,480 |  |  | 7,799 |  |  | 631,279 |
Total liabilities | 3,101,551 |  |  | 7,799 |  |  | 3,109,350 |
Oasis share of stockholders’ equity | 3,375,691 |  |  | — |  |  | 3,375,691 |
Net Changes in Capitalized Exploratory Well Costs | Net changes in capitalized exploratory well costs are reflected in the following table for the periods presented:
| December 31,
| 2018 |  | 2017 |  | 2016
| (In thousands)
Beginning of period | $ | — |  |  | $ | 2,097 |  |  | $ | 2,097 |
Exploratory well cost additions (pending determination of proved reserves) | 26,497 |  |  | 10 |  |  | — |
Exploratory well cost reclassifications (successful determination of proved reserves) | (22,040 | ) |  | (571 | ) |  | — |
Exploratory well dry hole costs (unsuccessful in adding proved reserves) | — |  |  | (1,536 | ) |  | — |
End of period | $ | 4,457 |  |  | $ | — |  |  | $ | 2,097 |

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- Definition Tabular disclosure of prior period adjustments to previously issued financial statements including (1) the effect of the correction on each financial statement line item and any per-share amounts affected for each prior period presented (2) the cumulative effect of the change on retained earnings or other appropriate components of equity or net assets in the statement of financial position, as of the beginning of the earliest period presented, and (3) the effect of the prior period adjustments (both gross and net of applicable income tax) on the net income of each prior period presented in the entity's annual report for the year in which the adjustments are made. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22663-107794 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22644-107794 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22658-107794 + Details
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