XML 82 R72.htm IDEA: XBRL DOCUMENT v3.19.2
Business Segments - Depreciation, Depletion, Amortization and Impairment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Segment Reporting Information [Line Items]        
Depreciation, depletion, amortization and impairment $ 208,688 $ 212,384 $ 423,098 $ 422,276
Corporate        
Segment Reporting Information [Line Items]        
Depreciation, depletion, amortization and impairment 1,774 1,881 3,577 4,118
Operating Segments | Contract Drilling        
Segment Reporting Information [Line Items]        
Depreciation, depletion, amortization and impairment 128,402 130,938 258,719 261,855
Operating Segments | Pressure Pumping        
Segment Reporting Information [Line Items]        
Depreciation, depletion, amortization and impairment 56,185 57,862 116,320 114,384
Operating Segments | Directional Drilling        
Segment Reporting Information [Line Items]        
Depreciation, depletion, amortization and impairment 10,870 11,874 21,237 22,776
Other Operations        
Segment Reporting Information [Line Items]        
Depreciation, depletion, amortization and impairment $ 11,457 $ 9,829 $ 23,245 $ 19,143