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Business Segments - Income (Loss) Before Income Taxes (Detail) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] |  |
Operating income (loss) | $ (117,527,000) | $ (494,410,000)
Credit loss expense | 0 | (1,055,000)
Interest income | 139,000 | 657,000
Interest expense | (10,009,000) | (11,224,000)
Other | 14,000 | 85,000
Loss before income taxes | (127,383,000) | (504,892,000)
Corporate |  |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] |  |
Operating income (loss) | (19,688,000) | (24,485,000)
Operating Segments | Contract Drilling |  |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] |  |
Operating income (loss) | (48,621,000) | (404,018,000)
Operating Segments | Pressure Pumping |  |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] |  |
Operating income (loss) | (39,739,000) | (35,486,000)
Operating Segments | Directional Drilling |  |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] |  |
Operating income (loss) | (4,923,000) | (10,595,000)
Other Operations |  |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] |  |
Operating income (loss) | $ (4,556,000) | $ (18,771,000)

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