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Impairments and Other Charges (Tables) | 12 Months Ended
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Dec. 31, 2021
Impairments and Other Charges |
Schedule of impairments and other charges | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ |  | 2021 |  | 2020 |  | 2019
Goodwill impairments | ​ | $ | — | ​ | $ | 27,798 | ​ | $ | 155,973
Intangible asset impairment | ​ | ​ | — | ​ | ​ | 83,624 | ​ | ​ | 47,731
US Drilling | ​ | ​ | — | ​ | ​ | 87,333 | ​ | ​ | —
Canada Drilling | ​ | ​ | 58,545 | ​ | ​ | — | ​ | ​ | 17,818
International Drilling | ​ | ​ | 215 | ​ | ​ | 117,113 | ​ | ​ | 17,927
Drilling Solutions | ​ | ​ | — | ​ | ​ | 28,624 | ​ | ​ | —
Rig Technologies | ​ | ​ | 418 | ​ | ​ | 2,936 | ​ | ​ | 7,823
Oil and gas related assets | ​ | ​ | — | ​ | ​ | 24,543 | ​ | ​ | —
Severance and transaction related costs | ​ | ​ | 6,228 | ​ | ​ | 19,070 | ​ | ​ | 11,447
Other assets | ​ | ​ | 1,325 | ​ | ​ | 19,590 | ​ | ​ | 43,220
Total | ​ | $ | 66,731 | ​ | $ | 410,631 | ​ | $ | 301,939

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