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Restructuring Expenses - Restructuring Expenses by Reportable Segment (Detail) - Operating Segments - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2020
Restructuring Cost And Reserve [Line Items]    
Severance costs $ 6,500 $ 6,500
Contract termination costs 20,373 20,373
Other exit costs 1,544 1,544
ROU asset abandonments 9,921 9,921
Total 38,338 38,338
Contract Drilling    
Restructuring Cost And Reserve [Line Items]    
Severance costs 1,821 1,821
Other exit costs 523 523
ROU asset abandonments 86 86
Total 2,430 2,430
Pressure Pumping    
Restructuring Cost And Reserve [Line Items]    
Severance costs 3,460 3,460
Contract termination costs 20,373 20,373
Other exit costs 194 194
ROU asset abandonments 7,304 7,304
Total 31,331 31,331
Directional Drilling    
Restructuring Cost And Reserve [Line Items]    
Severance costs 503 503
Other exit costs 827 827
ROU asset abandonments 1,845 1,845
Total 3,175 3,175
Other Operations    
Restructuring Cost And Reserve [Line Items]    
Severance costs 501 501
Total 501 501
Corporate    
Restructuring Cost And Reserve [Line Items]    
Severance costs 215 215
ROU asset abandonments 686 686
Total $ 901 $ 901