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Impairments and Other Charges (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Jun. 30, 2019 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) item
Impairments and Other Charges |  |  |  |  |  |
Goodwill impairments | $ 27,800 |  |  | $ 27,798 | $ 155,973 |
Intangible asset impairment |  |  |  | 83,624 | 47,731 | $ 14,300
Oil and gas related assets |  |  |  | 24,543 |  |
Severance and transaction related costs |  |  |  | 19,070 | 11,447 | 14,323
Other assets |  |  |  | 19,590 | 43,220 |
Total |  |  |  | 410,631 | 301,939 | 139,178
U.S. Drilling |  |  |  |  |  |
Impairments and Other Charges |  |  |  |  |  |
Goodwill impairments |  | $ 52,200 |  |  | 52,203 |
U.S. Drilling | Drilling, workover rigs and related equipment |  |  |  |  |  |
Impairments and Other Charges |  |  |  |  |  |
Intangible asset impairment |  |  |  | 87,333 |  | 35,057
Recorded impairment |  |  |  | 33,300 |  |
Impairment wrote down |  |  |  | 54,000 |  |
Impairment for underutilized rigs |  |  |  |  |  | 20,500
Impairment loss |  |  |  |  |  | $ 14,600
Number of SCR rigs | item |  |  |  |  |  | 13
Canada Drilling | Other Machinery and Equipment |  |  |  |  |  |
Impairments and Other Charges |  |  |  |  |  |
Intangible asset impairment |  |  |  |  | 17,818 |
International Drilling |  |  |  |  |  |
Impairments and Other Charges |  |  |  |  |  |
Goodwill impairments |  |  | $ 75,600 |  | 75,634 |
International Drilling | Drilling, workover rigs and related equipment |  |  |  |  |  |
Impairments and Other Charges |  |  |  |  |  |
Intangible asset impairment |  |  |  | 117,113 | 17,927 | $ 75,751
Recorded impairment |  |  |  | 30,500 |  |
Impairment wrote down |  |  |  | 86,600 |  |
Impairment for underutilized rigs |  |  |  |  | 2,500 |
Impairment of specific rigs |  |  |  |  |  | 11,100
Impairment loss |  |  |  |  | 15,400 | $ 64,700
Number of offshore drilling rigs sold | item |  |  |  |  |  | 3
Number of workover | item |  |  |  |  |  | 8
Drilling Solutions |  |  |  |  |  |
Impairments and Other Charges |  |  |  |  |  |
Goodwill impairments |  |  |  | 11,436 |  |
Drilling Solutions | Other Machinery and Equipment |  |  |  |  |  |
Impairments and Other Charges |  |  |  |  |  |
Intangible asset impairment |  |  |  | 28,624 |  |
Rig Technologies |  |  |  |  |  |
Impairments and Other Charges |  |  |  |  |  |
Goodwill impairments |  | $ 10,100 | $ 18,000 | 16,362 | 28,136 |
Intangible asset impairment |  |  |  | 2,936 | 7,823 | $ 14,047
Provision for obsolescence |  |  |  | $ 2,900 | $ 7,800 | $ 14,000

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