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Business Segments - Assets (Detail) - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Assets |  | $ 4,398,170 | $ 4,529,484
Operating Segments | Contract Drilling |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Assets |  | 3,342,096 | 3,457,044
Operating Segments | Pressure Pumping |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Assets |  | 760,692 | 813,704
Operating Segments | Oil and Natural Gas |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Assets |  | 30,183 | 34,073
Corporate and other |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Assets | [1] | $ 265,199 | $ 224,663
[1] | Corporate and other assets primarily include cash on hand, income tax receivables and certain deferred tax assets.

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