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Business Segments - Additional Information (Detail) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 USD ($) Rigs | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2019 USD ($) Rigs Segment Customer | Dec. 31, 2018 USD ($) Customer | Dec. 31, 2017 USD ($) Customer
Segment Reporting Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of reportable business segments | Segment |  |  |  |  |  |  |  |  | 3 |  |
Total operating revenues | $ 492,297 | $ 598,452 | $ 675,765 | $ 704,171 | $ 795,937 | $ 867,478 | $ 854,418 | $ 809,164 | $ 2,470,685 | $ 3,326,997 | $ 2,356,684
Long-lived assets | $ 3,306,677 |  |  |  | 4,002,549 |  |  |  | $ 3,306,677 | $ 4,002,549 |
Major Customer |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of customers accounted for 10% or more of consolidated revenues | Customer |  |  |  |  |  |  |  |  | 0 | 0 | 0
Contract Drilling |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Marketable land-based drilling rigs | Rigs | 216 |  |  |  |  |  |  |  | 216 |  |
Total operating revenues |  |  |  |  |  |  |  |  | $ 1,308,350 | $ 1,430,492 | $ 1,040,033
Contract Drilling | Canada |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total operating revenues |  |  |  |  |  |  |  |  | 4,700 | 9,300 | $ 13,700
Long-lived assets | $ 20,100 |  |  |  | $ 26,200 |  |  |  | $ 20,100 | $ 26,200 |

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