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Business Segments - Operating Income (Loss) from Continuing Operations Before Income Taxes (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]    
Operating income (loss) $ (95,259) $ 24,103
Other operating income (expense), net [1] 1,345 (9,344)
Interest income 110 283
Interest expense, net of amount capitalized (10,800) (8,541)
Other 16  
Income (loss) before income taxes (105,933) 15,845
Operating Segments    
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]    
Operating income (loss) (81,910) 48,820
Operating Segments | Contract Drilling    
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]    
Operating income (loss) (35,096) 68,398
Operating Segments | Pressure Pumping    
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]    
Operating income (loss) (43,959) (15,016)
Operating Segments | Oil and Natural Gas    
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]    
Operating income (loss) (2,855) (4,562)
Corporate and other    
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]    
Operating income (loss) $ (14,694) $ (15,373)
[1] Other operating income (expense) includes net gains or losses associated with the disposal of assets related to corporate strategy decisions of the executive management group. Accordingly, the related gains or losses have been excluded from the results of specific segments. This caption also includes expenses related to certain legal settlements.