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Business Segments - Revenues (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Segment Reporting Revenue Reconciling Item [Line Items]    
Total revenues $ 240,929 $ 445,927
Contract Drilling    
Segment Reporting Revenue Reconciling Item [Line Items]    
Total revenues 133,501 267,364
Pressure Pumping    
Segment Reporting Revenue Reconciling Item [Line Items]    
Total revenues 75,839 125,107
Directional Drilling    
Segment Reporting Revenue Reconciling Item [Line Items]    
Total revenues 19,670 34,485
Operating Segments | Contract Drilling    
Segment Reporting Revenue Reconciling Item [Line Items]    
Total revenues 133,662 267,840
Operating Segments | Pressure Pumping    
Segment Reporting Revenue Reconciling Item [Line Items]    
Total revenues 75,839 125,107
Operating Segments | Directional Drilling    
Segment Reporting Revenue Reconciling Item [Line Items]    
Total revenues 19,670 34,485
Other Operations    
Segment Reporting Revenue Reconciling Item [Line Items]    
Total revenues [1] 14,566 22,845
Intersegment Elimination | Contract Drilling    
Segment Reporting Revenue Reconciling Item [Line Items]    
Total revenues [2] (161) (476)
Intersegment Elimination | Other Operations    
Segment Reporting Revenue Reconciling Item [Line Items]    
Total revenues [2] $ (2,647) $ (3,874)
[1] Other operations includes our oilfield rentals business, drilling equipment service business, the electrical controls and automation business and the oil and natural gas working interests.
[2] Intercompany revenues consist of revenues from contract drilling for services provided to our other operations, and revenues from other operations for services provided to contract drilling, pressure pumping and within other operations. These revenues are generally based on estimated external selling prices and are eliminated during consolidation.