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Segment Information - Depreciation and amortization (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Segment Information |  |  |
Depreciation and amortization | $ 665,072 | $ 693,381 | $ 853,699
Operating segments | U.S. Drilling |  |  |
Segment Information |  |  |
Depreciation and amortization | 311,759 | 326,361 | 398,326
Operating segments | Canada Drilling |  |  |
Segment Information |  |  |
Depreciation and amortization |  | 11,604 | 24,784
Operating segments | International Drilling |  |  |
Segment Information |  |  |
Depreciation and amortization | 329,335 | 323,431 | 377,599
Operating segments | Drilling Solutions |  |  |
Segment Information |  |  |
Depreciation and amortization | 20,829 | 26,660 | 40,074
Operating segments | Rig Technologies |  |  |
Segment Information |  |  |
Depreciation and amortization | 5,794 | 8,191 | 15,299
Other reconciling items |  |  |
Segment Information |  |  |
Depreciation and amortization | $ (2,645) | $ (2,866) | $ (2,383)

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