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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Revenues: |  |  |  |  |
Total revenues |  | $ 119,765 | $ 99,192 | $ 367,772 | $ 296,286
Costs and expenses: |  |  |  |  |
Vessel operating costs |  | 80,619 | 65,237 | 243,261 | 194,613
Costs of other operating revenues |  | 534 | 1,681 | 1,884 | 4,797
General and administrative |  | 30,474 | 25,546 | 81,310 | 73,536
Depreciation and amortization |  | 25,735 | 13,390 | 73,705 | 38,192
Loss (gain) on asset dispositions, net |  | (270) | 1,571 | (1,047) | (1,686)
Asset impairments | [1] | 5,224 | 16,853 | 5,224 | 24,254
Total operating costs and expenses |  | 142,316 | 124,278 | 404,337 | 333,706
Operating loss |  | (22,551) | (25,086) | (36,565) | (37,420)
Other income (expense): |  |  |  |  |
Foreign exchange gain (loss) |  | 173 | 1 | (324) | (1,349)
Equity in net earnings (losses) of unconsolidated companies |  | (468) | 56 | (435) | (14,993)
Interest income and other, net |  | 1,579 | 2,709 | 5,908 | 5,495
Interest and other debt costs, net |  | (7,468) | (7,585) | (22,786) | (22,731)
Total other expense |  | (6,184) | (4,819) | (17,637) | (33,578)
Loss before income taxes |  | (28,735) | (29,905) | (54,202) | (70,998)
Income tax expense |  | 15,071 | 1,278 | 26,443 | 10,396
Net loss |  | (43,806) | (31,183) | (80,645) | (81,394)
Less: Net income attributable to noncontrolling interests |  | 394 | (287) | 1,245 | (386)
Net loss attributable to Tidewater Inc. |  | $ (44,200) | $ (30,896) | $ (81,890) | $ (81,008)
Basic loss per common share |  | $ (1.15) | $ (1.16) | $ (2.17) | $ (3.23)
Diluted loss per common share |  | $ (1.15) | $ (1.16) | $ (2.17) | $ (3.23)
Weighted average common shares outstanding |  | 38,537 | 26,615 | 37,767 | 25,073
Adjusted weighted average common shares |  | 38,537 | 26,615 | 37,767 | 25,073
Vessel Revenues |  |  |  |  |
Revenues: |  |  |  |  |
Total revenues |  | $ 117,173 | $ 97,011 | $ 360,476 | $ 288,679
Other Operating Revenues |  |  |  |  |
Revenues: |  |  |  |  |
Total revenues |  | $ 2,592 | $ 2,181 | $ 7,296 | $ 7,607
[1] | Refer to Note (14) for additional information regarding asset impairment charges.

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