XML 114 R100.htm IDEA: XBRL DOCUMENT v3.20.4
Business Segments - Identifiable Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Segment Reporting Asset Reconciling Item [Line Items]      
Total assets $ 3,299,069 $ 4,439,615 $ 5,469,866
Corporate      
Segment Reporting Asset Reconciling Item [Line Items]      
Total assets [1] 300,566 261,019 314,276
Operating Segments | Contract Drilling      
Segment Reporting Asset Reconciling Item [Line Items]      
Total assets 2,315,318 3,190,463 3,817,638
Operating Segments | Pressure Pumping      
Segment Reporting Asset Reconciling Item [Line Items]      
Total assets 486,702 695,570 921,237
Operating Segments | Directional Drilling      
Segment Reporting Asset Reconciling Item [Line Items]      
Total assets 107,807 164,273 239,341
Other Operations      
Segment Reporting Asset Reconciling Item [Line Items]      
Total assets $ 88,676 $ 128,290 $ 177,374
[1] Corporate assets primarily include cash on hand and certain property and equipment.