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CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2018 | Mar. 31, 2017
Operating revenues: |  |  |  |
Drilling - U.S. Land | $ 482,729 | $ 330,967 | $ 944,369 | $ 594,603
Drilling - Offshore | 32,983 | 36,235 | 66,349 | 70,047
Drilling - International Land | 52,459 | 34,757 | 115,673 | 102,788
Other | 9,313 | 3,324 | 15,180 | 6,435
Total operating revenues | 577,484 | 405,283 | 1,141,571 | 773,873
Operating costs and expenses: |  |  |  |
Operating costs, excluding depreciation and amortization | 385,556 | 296,829 | 758,639 | 544,508
Depreciation and amortization | 145,675 | 152,777 | 288,942 | 286,624
Research and development | 4,436 | 2,719 | 7,670 | 5,527
General and administrative | 48,325 | 33,519 | 94,873 | 67,781
Income from asset sales | (5,255) | (14,889) | (10,820) | (15,731)
Total operating costs and expenses | 578,737 | 470,955 | 1,139,304 | 888,709
Operating income (loss) from continuing operations | (1,253) | (65,672) | 2,267 | (114,836)
Other income (expense): |  |  |  |
Interest and dividend income | 1,847 | 1,338 | 3,571 | 2,328
Interest expense | (6,028) | (6,084) | (11,801) | (11,139)
Other | (121) | 174 | 409 | 561
Total other income (expense) | (4,302) | (4,572) | (7,821) | (8,250)
Loss from continuing operations before income taxes | (5,555) | (70,244) | (5,554) | (123,086)
Income tax benefit | (3,922) | (21,771) | (504,563) | (40,059)
Income (loss) from continuing operations | (1,633) | (48,473) | 499,009 | (83,027)
Income (loss) from discontinued operations before income taxes | 1,263 | (94) | 744 | (518)
Income tax provision | 11,509 | 251 | 11,526 | 336
Loss from discontinued operations | (10,246) | (345) | (10,782) | (854)
NET INCOME (LOSS) | $ (11,879) | $ (48,818) | $ 488,227 | $ (83,881)
Basic earnings per common share: |  |  |  |
Income (loss) from continuing operations (in dollars per share) | $ (0.03) | $ (0.45) | $ 4.55 | $ (0.77)
Loss from discontinued operations (in dollars per share) | (0.09) |  | (0.10) | (0.01)
Net income (loss) (in dollars per share) | (0.12) | (0.45) | 4.45 | (0.78)
Diluted earnings per common share: |  |  |  |
Income (loss) from continuing operations (in dollars per share) | (0.03) | (0.45) | 4.53 | (0.77)
Loss from discontinued operations (in dollars per share) | (0.09) |  | (0.10) | (0.01)
Net income (loss) (in dollars per share) | $ (0.12) | $ (0.45) | $ 4.43 | $ (0.78)
Weighted average shares outstanding (in thousands): |  |  |  |
Basic (in shares) | 108,868 | 108,565 | 108,775 | 108,419
Diluted (in shares) | 108,868 | 108,565 | 109,212 | 108,419
Dividends declared per common share (in dollars per share) | $ 0.70 | $ 0.70 | $ 1.4 | $ 1.40

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