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Commitments and Contingencies (Details 3) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Summary of total maximum amount of financial guarantees issued  
Remainder of 2015 $ 128,843nbr_GuaranteeObligationsMaximumExposureInYearOne
2016 73,528nbr_GuaranteeObligationsMaximumExposureInYearTwo
2017 19nbr_GuaranteeObligationsMaximumExposureInYearThree
Thereafter 1nbr_GuaranteeObligationsMaximumExposureAfterYearThree
Total $ 202,391us-gaap_GuaranteeObligationsMaximumExposure