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Impairments and Other Charges (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Mar. 31, 2020
Jun. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Impairments and Other Charges            
Goodwill impairments           $ 27,798
Intangible asset impairment           83,625
Oil and gas related assets     $ 12,300     12,286
Severance and transaction related costs $ 2,324 $ 4,779     $ 4,916 16,614
Other assets 199 (107)     1,325 16,877
Total 3,068 5,017     65,419 339,303
U.S. Drilling            
Impairments and Other Charges            
Impairment of assets     33,300      
U.S. Drilling | Drilling, workover rigs and related equipment            
Impairments and Other Charges            
Impairment of assets         87,300 87,333
Provision for retirement of assets     54,000      
Canada Drilling | Drilling, workover rigs and related equipment            
Impairments and Other Charges            
Impairment of assets $ 545       58,545  
International Drilling | Drilling, workover rigs and related equipment            
Impairments and Other Charges            
Impairment of assets   544     215 63,620
Recorded impairment     30,500 $ 32,600    
Drilling Solutions            
Impairments and Other Charges            
Goodwill impairments     11,400      
Drilling Solutions | Drilling, workover rigs and related equipment            
Impairments and Other Charges            
Impairment of assets   (17)     28,600 28,624
Rig Technologies            
Impairments and Other Charges            
Goodwill impairments     16,400      
Provision for obsolescence           2,500
Rig Technologies | Drilling, workover rigs and related equipment            
Impairments and Other Charges            
Impairment of assets   $ (182)     $ 418 $ 2,526
Drilling and Rig Services            
Impairments and Other Charges            
Intangible asset impairment     $ 83,600