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QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables) | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Quarterly Financial Information | Selected financial information for interim periods, is as follows:
|  | Successor |
|  | Quarter Ended |  |  | Quarter Ended |  |  |  | Quarter Ended |  |  | Quarter Ended |
|  | March 31, |  |  | June 30, |  |  |  | September 30, |  |  | December 31, |
(In thousands except per share data) |  | 2018 |  |  | 2018 |  |  |  | 2018 |  |  | 2018 |
Year Ended December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 91,493 |  |  |  | 105,601 |  |  |  |  | 99,192 |  |  |  | 110,234 |
Impairment of due from affiliate included in operating loss |  |  | — |  |  |  | — |  |  |  |  | — |  |  |  | (20,083 | )
Asset impairments included in operating loss |  |  | (6,186 | ) |  |  | (1,215 | ) |  |  |  | (16,853 | ) |  |  | (36,878 | )
Operating income (loss) |  |  | (12,194 | ) |  |  | (140 | ) |  |  |  | (25,086 | ) |  |  | (70,077 | )
Net loss attributable to Tidewater Inc. |  |  | (39,172 | ) |  |  | (10,940 | ) |  |  |  | (30,896 | ) |  |  | (90,509 | )
Basic loss per share attributable to Tidewater Inc. |  | $ | (1.67 | ) |  |  | (.44 | ) |  |  |  | (1.16 | ) |  |  | (2.83 | )
Diluted loss per share attributable to Tidewater Inc. |  | $ | (1.67 | ) |  |  | (.44 | ) |  |  |  | (1.16 | ) |  |  | (2.83 | )
|  | Successor |  |  |  | Predecessor |
|  |  |  |  |  | Period from |  |  |  | Period from |  |  |  |  |
|  | Quarter Ended |  |  | August 1, 2017 |  |  |  | July 1, 2017 |  |  | Quarter Ended |
|  | December 31, |  |  | through |  |  |  | through |  |  | June 30, |
(In thousands except per share data) |  | 2017 |  |  | September 30, 2017 |  |  |  | July 31, 2017 |  |  | 2017 |
Nine Month Transition Period Ended December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 104,453 |  |  |  | 74,300 |  |  |  |  | 36,263 |  |  |  | 115,106 |
Asset impairments included in operating loss |  |  | (16,777 | ) |  |  | — |  |  |  |  | (21,325 | ) |  |  | (163,423 | )
Operating income (loss) |  |  | (18,091 | ) |  |  | (5,782 | ) |  |  |  | (38,674 | ) |  |  | (205,374 | )
Net loss attributable to Tidewater Inc. |  |  | (23,573 | ) |  |  | (15,693 | ) |  |  |  | (1,122,475 | ) |  |  | (524,434 | )
Basic loss per share attributable to Tidewater Inc. |  | $ | (1.02 | ) |  |  | (.81 | ) |  |  |  | (23.82 | ) |  |  | (11.13 | )
Diluted loss per share attributable to Tidewater Inc. |  | $ | (1.02 | ) |  |  | (.81 | ) |  |  |  | (23.82 | ) |  |  | (11.13 | )

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109225645&loc=d3e1280-108306 + Details
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