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Unaudited Quarterly Financial Information (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Unaudited Quarterly Financial Information |  |  |  |  |  |  |  |  |  |  |
Operating revenues and Earnings (losses) from unconsolidated affiliates: | $ 1,783,407 nbr_OperatingRevenuesAndIncomeLossFromEquityMethodOfInvestment | $ 1,810,911 nbr_OperatingRevenuesAndIncomeLossFromEquityMethodOfInvestment | $ 1,616,405 nbr_OperatingRevenuesAndIncomeLossFromEquityMethodOfInvestment | $ 1,587,173 nbr_OperatingRevenuesAndIncomeLossFromEquityMethodOfInvestment | $ 1,605,390 nbr_OperatingRevenuesAndIncomeLossFromEquityMethodOfInvestment | $ 1,548,965 nbr_OperatingRevenuesAndIncomeLossFromEquityMethodOfInvestment | $ 1,459,326 nbr_OperatingRevenuesAndIncomeLossFromEquityMethodOfInvestment | $ 1,538,373 nbr_OperatingRevenuesAndIncomeLossFromEquityMethodOfInvestment | $ 6,797,896 nbr_OperatingRevenuesAndIncomeLossFromEquityMethodOfInvestment | $ 6,152,054 nbr_OperatingRevenuesAndIncomeLossFromEquityMethodOfInvestment | $ 6,554,333 nbr_OperatingRevenuesAndIncomeLossFromEquityMethodOfInvestment
Income (loss) from continuing operations, net of tax | (886,401)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 102,430 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 65,729 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 48,977 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 128,516 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | (90,510)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 28,128 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 92,207 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | (669,265)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 158,341 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 232,974 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
Income (loss) from discontinued operations, net of tax | (4,467)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | 4,005 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | (1,032)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | 1,515 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | 23,113 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | (14,430)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | (26,873)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | 7,011 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | 21 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | (11,179)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | (67,526)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
Less: Net (income) loss attributable to noncontrolling interest | (202)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (387)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (253)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (573)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (1,026)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (441)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (5,616)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (97)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (1,415)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (7,180)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (621)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Net income (loss) attributable to Nabors | (891,070)us-gaap_NetIncomeLoss | 106,048 us-gaap_NetIncomeLoss | 64,444 us-gaap_NetIncomeLoss | 49,919 us-gaap_NetIncomeLoss | 150,603 us-gaap_NetIncomeLoss | (105,381)us-gaap_NetIncomeLoss | (4,361)us-gaap_NetIncomeLoss | 99,121 us-gaap_NetIncomeLoss | (670,659)us-gaap_NetIncomeLoss | 139,982 us-gaap_NetIncomeLoss | 164,827 us-gaap_NetIncomeLoss
Earnings (losses) per share: |  |  |  |  |  |  |  |  |  |  |
Basic from continuing operations (in dollars per share) | $ (3.06)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.34 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.21 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.16 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.43 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ (0.30)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.08 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.31 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ (2.28)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.51 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.80 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare
Basic from discontinued operations (in dollars per share) | $ (0.02)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 0.02 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare |  | $ 0.01 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 0.07 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ (0.05)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ (0.09)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 0.03 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare |  | $ (0.04)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ (0.23)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
Total Basic (in dollars per share) | $ (3.08)us-gaap_EarningsPerShareBasic | $ 0.36 us-gaap_EarningsPerShareBasic | $ 0.21 us-gaap_EarningsPerShareBasic | $ 0.17 us-gaap_EarningsPerShareBasic | $ 0.50 us-gaap_EarningsPerShareBasic | $ (0.35)us-gaap_EarningsPerShareBasic | $ (0.01)us-gaap_EarningsPerShareBasic | $ 0.34 us-gaap_EarningsPerShareBasic | $ (2.28)us-gaap_EarningsPerShareBasic | $ 0.47 us-gaap_EarningsPerShareBasic | $ 0.57 us-gaap_EarningsPerShareBasic
Diluted from continuing operations (in dollars per share) | $ (3.06)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.34 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.21 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.16 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.42 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ (0.30)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.08 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.31 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ (2.28)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.51 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.79 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare
Diluted from discontinued operations (in dollars per share) | $ (0.02)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 0.01 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare |  |  | $ 0.08 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ (0.05)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ (0.09)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 0.02 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare |  | $ (0.04)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ (0.23)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
Total Diluted (in dollars per share) | $ (3.08)us-gaap_EarningsPerShareDiluted | $ 0.35 us-gaap_EarningsPerShareDiluted | $ 0.21 us-gaap_EarningsPerShareDiluted | $ 0.16 us-gaap_EarningsPerShareDiluted | $ 0.50 us-gaap_EarningsPerShareDiluted | $ (0.35)us-gaap_EarningsPerShareDiluted | $ (0.01)us-gaap_EarningsPerShareDiluted | $ 0.33 us-gaap_EarningsPerShareDiluted | $ (2.28)us-gaap_EarningsPerShareDiluted | $ 0.47 us-gaap_EarningsPerShareDiluted | $ 0.56 us-gaap_EarningsPerShareDiluted
Additional disclosure |  |  |  |  |  |  |  |  |  |  |
U.S. oil and gas joint venture earnings (losses) | $ (400)us-gaap_IncomeLossFromEquityMethodInvestments | $ (2,900)us-gaap_IncomeLossFromEquityMethodInvestments | $ (600)us-gaap_IncomeLossFromEquityMethodInvestments | $ (2,400)us-gaap_IncomeLossFromEquityMethodInvestments | $ (1,600)us-gaap_IncomeLossFromEquityMethodInvestments | $ (2,600)us-gaap_IncomeLossFromEquityMethodInvestments | $ 1,400 us-gaap_IncomeLossFromEquityMethodInvestments | $ 2,900 us-gaap_IncomeLossFromEquityMethodInvestments | $ (6,301)us-gaap_IncomeLossFromEquityMethodInvestments | $ 39 us-gaap_IncomeLossFromEquityMethodInvestments | $ (288,718)us-gaap_IncomeLossFromEquityMethodInvestments

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