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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Dec. 31, 2022
Dec. 31, 2021
OPERATING REVENUES    
Drilling services $ 717,170 $ 407,534
Other 2,467 2,248
Total operating revenues 719,637 409,782
OPERATING COSTS AND EXPENSES    
Drilling services operating expenses, excluding depreciation and amortization 428,251 299,652
Other operating expenses 1,126 1,182
Depreciation and amortization 96,655 100,437
Research and development 6,933 6,527
Selling, general and administrative 48,455 43,715
Impairment expense 12,097 4,363
Restructuring charges 0 742
Gain on reimbursement of drilling equipment (15,724) (5,254)
Other (gain) loss on sale of assets (2,379) 1,029
Total operating costs and expenses 575,414 452,393
OPERATING INCOME (LOSS) FROM CONTINUING OPERATIONS 144,223 (42,611)
Other income (expense)    
Interest and dividend income 4,705 2,589
Interest expense (4,355) (6,114)
Gain (loss) on investment securities (15,091) 47,862
Loss on extinguishment of debt 0 (60,083)
Other (660) (542)
Total unallocated amounts (15,401) (16,288)
Income (loss) from continuing operations before income taxes 128,822 (58,899)
Income tax expense (benefit) 32,395 (7,568)
Income (loss) from continuing operations 96,427 (51,331)
Income (loss) from discontinued operations before income taxes 718 (31)
Income tax expense 0 0
Income (loss) from discontinued operations 718 (31)
NET INCOME (LOSS) $ 97,145 $ (51,362)
Basic earnings (loss) per common share:    
Income (loss) from continuing operations (in dollars per share) $ 0.91 $ (0.48)
Income from discontinued operations (in dollars per share) 0.01 0
Net income (loss) (in dollars per share) 0.92 (0.48)
Diluted earnings (loss) per common share:    
Income (loss) from continuing operations (in dollars per share) 0.90 (0.48)
Income from discontinued operations (in dollars per share) 0.01 0
Net income (loss) (in dollars per share) $ 0.91 $ (0.48)
Weighted average shares outstanding:    
Basic (in shares) 105,248 107,571
Diluted (in shares) 106,104 107,571