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Business Segments - Revenues (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Segment Reporting Revenue Reconciling Item [Line Items]                      
Total revenues $ 795,937 $ 867,478 $ 854,418 $ 809,164 $ 787,334 $ 684,989 $ 579,186 $ 305,175 $ 3,326,997 $ 2,356,684 $ 915,866
Contract Drilling                      
Segment Reporting Revenue Reconciling Item [Line Items]                      
Total revenues                 1,430,492 1,040,033 543,663
Pressure Pumping                      
Segment Reporting Revenue Reconciling Item [Line Items]                      
Total revenues                 1,573,396 1,200,311 354,070
Directional Drilling                      
Segment Reporting Revenue Reconciling Item [Line Items]                      
Total revenues                 209,275 45,580  
Other Operations                      
Segment Reporting Revenue Reconciling Item [Line Items]                      
Total revenues [1]                 131,028 76,781 18,299
Operating Segments | Contract Drilling                      
Segment Reporting Revenue Reconciling Item [Line Items]                      
Total revenues                 1,432,012 1,041,492 544,196
Operating Segments | Pressure Pumping                      
Segment Reporting Revenue Reconciling Item [Line Items]                      
Total revenues                 1,573,396 1,200,311 354,070
Operating Segments | Directional Drilling                      
Segment Reporting Revenue Reconciling Item [Line Items]                      
Total revenues                 209,275 45,580  
Intersegment Elimination                      
Segment Reporting Revenue Reconciling Item [Line Items]                      
Total revenues [2]                 $ (18,714) $ (7,480) $ (699)
[1] Other operations includes the Company’s oilfield rentals business, pipe handling components and related technology business, the electrical controls and automation business, the oil and natural gas working interests and the Middle East/North Africa activities.
[2] In 2018 and 2017, intercompany revenues consists of contract drilling and revenues from other operations for services provided to contract drilling, pressure pumping and within other operations. In 2016, intercompany revenues consists of contract drilling and revenues within other operations.