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Investments in Unconsolidated Affiliates (Details) $ in Thousands, shares in Millions |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 24, 2015 USD ($) shares | Mar. 31, 2016 USD ($) | Mar. 31, 2015 USD ($) | Sep. 30, 2016 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) item | Dec. 31, 2015 USD ($) | May 24, 2015
Investments in Unconsolidated Affiliates |  |  |  |  |  |  |  |
Cash consideration in merger |  |  |  |  |  |  | $ 650,050 |
Nabors' share of equity method earnings (losses) |  |  |  |  | $ 7 | $ (221,914) | (75,081) |
Other-than-temporary impairment |  |  |  |  |  | 219,737 | 180,591 |
Summarized income statement (loss) information for investment in unconsolidated affiliates |  |  |  |  |  |  |  |
Nabors' share of equity method earnings (losses) |  |  |  |  | $ 7 | $ (221,914) | (75,081) |
C J Energy And Subsidiaries |  |  |  |  |  |  |  |
Investments in Unconsolidated Affiliates |  |  |  |  |  |  |  |
Number of allowed unsecured claims | item |  |  |  |  |  | 2 |  |
Maximum claim distribution to be received |  |  |  |  |  | $ 4,850 |  |
Maximum obligation amount relating to tax matters |  |  |  |  |  | $ 11,500 |  |
Prorate Share of warrant To Acquire Common Equity Percentage |  |  |  |  |  | 2.00% |  |
Strike price |  |  |  |  |  | $ 1,550,000 |  |
Joint Venture in Saudi Arabia |  |  |  |  |  |  |  |
Investments in Unconsolidated Affiliates |  |  |  |  |  |  |  |
Percentage of outstanding and issued common shares held |  |  |  |  |  |  |  | 51.00%
Remaining equity interest acquired (as a percent) |  |  |  |  |  |  |  | 49.00%
Unconsolidated Affiliates |  |  |  |  |  |  |  |
Investments in Unconsolidated Affiliates |  |  |  |  |  |  |  |
Nabors' share of equity method earnings (losses) |  |  |  | $ (221,933) |  |  | (81,260) |
Net income (loss) |  |  |  | (825,921) |  |  | (872,542) |
Summarized income statement (loss) information for investment in unconsolidated affiliates |  |  |  |  |  |  |  |
Current assets |  |  |  | 383,750 |  |  |  |
Long-term assets |  |  |  | 1,138,092 |  |  |  |
Current liabilities |  |  |  | 147,699 |  |  |  |
Long-term liabilities |  |  |  | 41,613 |  |  |  |
Gross revenues |  |  |  | 727,320 |  |  | 1,748,889 |
Gross margin |  |  |  | 18,943 |  |  | 225,773 |
Net income (loss) |  |  |  | (825,921) |  |  | (872,542) |
Nabors' share of equity method earnings (losses) |  |  |  | $ (221,933) |  |  | (81,260) |
C&J Energy Services, Ltd. |  |  |  |  |  |  |  |
Investments in Unconsolidated Affiliates |  |  |  |  |  |  |  |
Cash consideration in merger | $ 693,500 |  |  |  |  |  |  |
Cash proceeds from merger after working capital requirements | $ 650,000 |  |  |  |  |  |  |
Common shares held in merged entity | shares | 62.5 |  |  |  |  |  |  |
Percentage of outstanding and issued common shares held | 53.00% |  |  |  |  |  |  |
Nabors' share of equity method earnings (losses) |  |  |  |  |  | (221,933) | (81,260) |
Other-than-temporary impairment |  | $ 153,400 |  |  |  | 192,400 | 180,600 |
Estimated gross gain in merger |  |  | $ 102,200 |  |  |  |  |
Transaction costs related to the merger |  |  | $ 49,600 |  |  |  |  |
Post-closing adjustment for settlement of working capital requirements |  |  |  |  |  |  | 5,500 |
Summarized income statement (loss) information for investment in unconsolidated affiliates |  |  |  |  |  |  |  |
Nabors' share of equity method earnings (losses) |  |  |  |  |  | (221,933) | $ (81,260) |
C&J Energy Services, Ltd. | Other expense (income) |  |  |  |  |  |  |  |
Investments in Unconsolidated Affiliates |  |  |  |  |  |  |  |
Estimated fair value |  | 93,800 |  |  |  |  |  |
Charge against receivables |  | $ 23,800 |  |  |  |  |  |
Equity method investment charge to write off remaining value of investment |  |  |  |  |  | 39,000 |  |
Transaction costs related to the merger |  |  |  |  |  | $ 9,100 |  |

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