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Property, Plant and Equipment (Tables) | 12 Months Ended
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Dec. 31, 2021
Property, Plant and Equipment |
Schedule of major components of property, plant and equipment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, |
​ |  | 2022 |  | 2021 |
​ | ​ | (In thousands) |
Land | ​ | $ | 22,672 | ​ | $ | 22,955 | ​
Buildings | ​ |  | 134,063 | ​ |  | 130,917 | ​
Drilling rigs and related equipment | ​ |  | 11,722,404 | ​ |  | 11,718,450 | ​
Oilfield hauling and mobile equipment | ​ |  | 233,708 | ​ |  | 243,850 | ​
Other machinery and equipment | ​ |  | 216,233 | ​ |  | 200,740 | ​
​ | ​ | $ | 12,329,080 | ​ | $ | 12,316,912 | ​
Less: accumulated depreciation and amortization | ​ |  | (9,302,980) | ​ |  | (8,968,414) | ​
​ | ​ | $ | 3,026,100 | ​ | $ | 3,348,498 | ​

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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