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v3.20.4

Impairments and Other Charges (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Impairments and Other Charges |
Schedule of impairments and other charges | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Year Ended December 31,
​ |  |  | 2020 |  | 2019 |  | 2018
Impairments and Other Charges | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Goodwill impairments | ​ | ​ | $ | 27,798 | ​ | ​ | 155,973 | ​ | ​ | —
Intangible asset impairment | ​ | ​ | ​ | 83,624 | ​ | ​ | 47,731 | ​ | ​ | —
US Drilling | ​ | ​ | ​ | 87,333 | ​ | ​ | — | ​ | ​ | 35,057
Canada Drilling | ​ | ​ | ​ | — | ​ | ​ | 17,818 | ​ | ​ | —
International Drilling | ​ | ​ | ​ | 117,113 | ​ | ​ | 17,927 | ​ | ​ | 75,751
Drilling Solutions | ​ | ​ | ​ | 28,624 | ​ | ​ | — | ​ | ​ | —
Rig Technologies | ​ | ​ | ​ | 2,936 | ​ | ​ | 7,823 | ​ | ​ | 14,047
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

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