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Business Segments - Assets (Detail) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Total assets |  | $ 5,404,056 | $ 3,772,291
Other Operations |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Total assets |  | 164,200 | 48,885
Corporate |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Total assets | [1] | 129,551 | 36,957
Operating Segments | Contract Drilling |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Total assets |  | 3,943,899 | 3,032,819
Operating Segments | Pressure Pumping |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Total assets |  | $ 1,166,406 | $ 653,630
[1] | Corporate assets primarily include cash on hand and certain property and equipment.

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