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Common Shares - Shareholders Rights Plan (Details) | Jul. 16, 2012 $ / shares
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Right To Purchase Series Junior Participating Preferred Shares1 |
Shareholder Rights Plan |
Number of purchase rights issued per Common Share | $ 1

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- Definition The number of rights issued for each share of common stock outstanding. + References No definition available. + Details
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Namespace Prefix: | nbr_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=nbr_RightToPurchaseSeriesJuniorParticipatingPreferredShares1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |