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Business Segments - Assets (Detail) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Total assets |  | $ 5,472,975 | $ 3,772,291
Other Operations |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Total assets |  | 166,900 | 48,885
Corporate |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Total assets | [1] | 127,943 | 36,957
Operating Segments | Contract Drilling |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Total assets |  | 3,950,748 | 3,032,819
Operating Segments | Pressure Pumping |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Total assets |  | $ 1,227,384 | $ 653,630
[1] | Corporate assets primarily include cash on hand and certain property and equipment.

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