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Commitments and Contingencies (Details) (Petrello) | 3 Months Ended
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Mar. 31, 2013
Employment contracts |
Initial term of the employment agreement | 5 years
Automatic extension period | 1 year
New term of the employment agreement | 90 days
Employment benefit due to death or disability, payment period | 30 days
Employment agreement termination without cause, benefit as a ratio to 3 year average base salary and bonus | 2.99
Employment agreement termination without cause, benefit base period | 3 years
TSR Shares |
Employment contracts |
Vesting period | 3 years
Value of award that will vest as percentage of base salary | 150.00%
Performance Shares |
Employment contracts |
Vesting period | 3 years
Value of award that will vest as percentage of base salary | 200.00%

X
- Definition The period of time for which the employment agreement automatically extends. + References No definition available. + Details
Name: | nbr_EmploymentAgreementExtensionPeriod
Namespace Prefix: | nbr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the period of time preceding termination without cause used as a basis for calculating a benefit under an employment agreement. + References No definition available. + Details
Name: | nbr_EmploymentAgreementFormulaBenefitBasePeriod
Namespace Prefix: | nbr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the ratio of the employment benefit to the average of base salary and annual bonuses during the three year period preceding termination prior to the date specified in the contract. + References No definition available. + Details
Name: | nbr_EmploymentAgreementFormulaBenefitRatioToBaseSalaryBeforeDateSpecifiedInContract
Namespace Prefix: | nbr_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the initial term of the employment agreement. + References No definition available. + Details
Name: | nbr_EmploymentAgreementInitialTerm
Namespace Prefix: | nbr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the new term of the employment agreement. + References No definition available. + Details
Name: | nbr_EmploymentAgreementNewTerm
Namespace Prefix: | nbr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The period of time within which the reporting entity must make payment to a beneficiary under an employment agreement if the termination is due to death or disability. + References No definition available. + Details
Name: | nbr_EmploymentAgreementPaymentTermTriggeredDueToDeathOrDisability
Namespace Prefix: | nbr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the value of award that will vest under share-based payment arrangement as a percentage of the base salary. + References No definition available. + Details
Name: | nbr_ShareBasedCompensationArrangementByShareBasedPaymentAwardValueOfAwardThatWillVestAsPercentageOfBaseSalary
Namespace Prefix: | nbr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration