Quarterly report pursuant to Section 13 or 15(d)

Reportable Segments - Results of Operations by Reportable Segment (Detail)

v3.19.1
Reportable Segments - Results of Operations by Reportable Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Revenues:    
Revenues $ 157,397 $ 109,675
Operating gross margin:    
Total operating gross margin (loss) 11,424 (10,408)
General and administrative expense (8,147) (6,201)
Gain (loss) on disposition of assets, net 384 343
Reorganization items (92,977) 0
Total operating income (loss) (89,316) (16,266)
Interest expense (274) (11,240)
Interest income 8 23
Other (10) 291
Income (loss) before income taxes (89,592) (27,192)
Reimbursable revenue    
Revenues:    
Revenues 28,500 14,300
Exxon Neftegas Limited | Reimbursable revenue    
Revenues:    
Revenues $ 26,300 $ 12,100
Exxon Neftegas Limited | Customer Concentration Risk | Sales Revenue, Net    
Operating gross margin:    
Percentage of revenue from major customer 31.20% 28.60%
Exxon Neftegas Limited | Customer Concentration Risk | Sales Revenue, Net Of Reimbursable Revenues    
Operating gross margin:    
Percentage of revenue from major customer 17.70% 20.10%
Total rental tools services    
Revenues:    
Revenues $ 73,704 $ 52,225
Operating gross margin:    
Total operating gross margin (loss) 13,708 216
U.S. rental tools    
Revenues:    
Revenues 52,595 34,748
Operating gross margin:    
Total operating gross margin (loss) 17,289 4,231
International rental tools    
Revenues:    
Revenues 21,109 17,477
Operating gross margin:    
Total operating gross margin (loss) (3,581) (4,015)
Total drilling services    
Revenues:    
Revenues 83,693 57,450
Operating gross margin:    
Total operating gross margin (loss) (2,284) (10,624)
U.S. (Lower 48) drilling    
Revenues:    
Revenues 6,627 1,354
Operating gross margin:    
Total operating gross margin (loss) (1,508) (5,288)
International & Alaska drilling    
Revenues:    
Revenues 77,066 56,096
Operating gross margin:    
Total operating gross margin (loss) $ (776) $ (5,336)
International & Alaska drilling | Exxon Neftegas Limited | Customer Concentration Risk | Sales Revenue, Net    
Operating gross margin:    
Percentage of revenue from major customer 63.80% 55.90%
International & Alaska drilling | Exxon Neftegas Limited | Customer Concentration Risk | Sales Revenue, Net Of Reimbursable Revenues    
Operating gross margin:    
Percentage of revenue from major customer 46.60% 45.90%