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Business Segments - Identifiable Assets (Detail) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Total assets |  | $ 3,870,284 | $ 4,439,615
Corporate |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Total assets | [1] | 236,965 | 261,019
Operating Segments | Contract Drilling |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Total assets |  | 2,729,381 | 3,190,463
Operating Segments | Pressure Pumping |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Total assets |  | 636,140 | 695,570
Operating Segments | Directional Drilling |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Total assets |  | 155,350 | 164,273
Other Operations |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Total assets |  | $ 112,448 | $ 128,290
[1] | Corporate assets primarily include cash on hand and certain property and equipment.

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