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Business Segments - Revenues (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  | $ 220,801 | $ 207,141 | $ 250,380 | $ 445,927 | $ 492,297 | $ 598,452 | $ 675,765 | $ 704,171 | $ 1,124,249 | $ 2,470,685 | $ 3,326,997
Contract Drilling |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  | 669,126 | 1,308,350 | 1,430,492
Pressure Pumping |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  | 336,111 | 868,694 | 1,573,396
Directional Drilling |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  | 73,356 | 188,786 | 209,275
Operating Segments | Contract Drilling |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  | 670,357 | 1,309,988 | 1,432,012
Operating Segments | Pressure Pumping |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  | 336,111 | 868,694 | 1,573,396
Operating Segments | Directional Drilling |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  | 73,356 | 188,786 | 209,275
Other Operations |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total revenues | [1] |  |  |  |  |  |  |  |  | 57,962 | 122,885 | 131,028
Intersegment Elimination | Contract Drilling |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total revenues | [2] |  |  |  |  |  |  |  |  | (1,231) | (1,638) | (1,520)
Intersegment Elimination | Other Operations |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total revenues | [2] |  |  |  |  |  |  |  |  | $ (12,306) | $ (18,030) | $ (17,194)
[1] | Other operations includes our oilfield rentals business, drilling equipment service business, the electrical controls and automation business and the oil and natural gas working interests.
[2] | Intercompany revenues consist of revenues from contract drilling for services provided to our other operations, and revenues from other operations for services provided to contract drilling, pressure pumping and within other operations. These revenues are generally based on estimated external selling prices and are eliminated during consolidation.

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