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Unaudited Condensed Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Dec. 31, 2021
Dec. 31, 2020
OPERATING REVENUES    
Drilling services $ 407,534 $ 244,781
Other 2,248 1,596
Total operating revenues 409,782 246,377
OPERATING COSTS AND EXPENSES    
Drilling services operating expenses, excluding depreciation and amortization 299,652 198,689
Other operating expenses 1,182 1,362
Depreciation and amortization 100,437 106,861
Research and development 6,527 5,583
Selling, general and administrative 43,715 39,303
Asset impairment charge 4,363 0
Restructuring charges 742 138
Gain on reimbursement of drilling equipment (5,254) (2,191)
Other (gain) loss on sale of assets 1,029 (10,145)
Total operating costs and expenses 452,393 339,600
OPERATING LOSS FROM CONTINUING OPERATIONS (42,611) (93,223)
Other income (expense)    
Interest and dividend income 2,589 1,879
Interest expense (6,114) (6,139)
Gain on investment securities 47,862 2,924
Loss on extinguishment of debt (60,083) 0
Other (542) (1,480)
Total other income (expense) (16,288) (2,816)
Loss from continuing operations before income taxes (58,899) (96,039)
Income tax benefit (7,568) (18,115)
Loss from continuing operations (51,331) (77,924)
Income (loss) from discontinued operations before income taxes (31) 7,493
Income tax provision 0 0
Income (loss) from discontinued operations (31) 7,493
NET LOSS $ (51,362) $ (70,431)
Basic earnings (loss) per common share:    
Loss from continuing operations (in dollars per share) $ (0.48) $ (0.73)
Income from discontinued operations (in dollars per share) 0 0.07
Net loss (in dollars per share) (0.48) (0.66)
Diluted earnings (loss) per common share:    
Loss from continuing operations (in dollars per share) (0.48) (0.73)
Income from discontinued operations (in dollars per share) 0 0.07
Net loss (in dollars per share) $ (0.48) $ (0.66)
Weighted average shares outstanding:    
Basic (in shares) 107,571 107,617
Diluted (in shares) 107,571 107,617