XML 82 R67.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Debt (Details) - USD ($) $ in Thousands |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 09, 2017 | Mar. 27, 2015 | Sep. 30, 2015 | Jul. 31, 2015 | Feb. 28, 2015 | Apr. 30, 2013 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Debt |  |  |  |  |  |  |  |  |
Principal amount redeemed |  |  |  |  |  |  | $ 152,700 | $ 27,500 | $ 40,600
Additional aggregate principal amount |  |  |  |  |  |  | 600,000 |  |
Reduction in long-term debt |  |  |  |  |  |  | 493,612 | 27,478 | $ 46,800
Exercise of Accordian option |  |  |  |  |  |  | 50,000 |  |
Payment of debt principal |  |  |  |  |  |  | $ 162,500 | $ 300,000 |
Guarantor Subsidiaries |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Redemption price of debt instrument (as a percent) |  |  |  |  |  |  | 100.00% |  |
Redemption price of principal amount of debt instrument including accrued and unpaid interest (as a percent) |  |  |  |  |  |  | 101.00% |  |
2.35% senior notes due September 2016 |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Interest rate on senior notes due (as a percent) |  |  |  |  |  |  | 2.35% |  |
5.10% senior notes due September 2023 |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Interest rate on senior notes due (as a percent) |  |  |  |  |  |  | 5.10% |  |
9.25% senior notes due January 2019 |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Interest rate on senior notes due (as a percent) |  |  |  |  |  |  | 9.25% |  |
6.15% senior notes due February 2018 |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Interest rate on senior notes due (as a percent) |  |  |  |  |  |  | 6.15% |  |
5.00% senior notes due September 2020 |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Interest rate on senior notes due (as a percent) |  |  |  |  |  |  | 5.00% |  |
4.625% senior notes due September 2021 |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Interest rate on senior notes due (as a percent) |  |  |  |  |  |  | 4.625% |  |
5.50% senior notes due January 2023 |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Interest rate on senior notes due (as a percent) |  |  |  |  |  |  | 5.50% |  |
Mandatory debt prepayment |  |  |  |  |  |  | $ 162,500 |  |
5.50% senior notes due January 2023 | Guarantor Subsidiaries |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Aggregate amount of senior notes |  |  |  |  |  |  | $ 600,000 |  |
Interest rate on senior notes due (as a percent) |  |  |  |  |  |  | 5.50% |  |
Redemption price of principal amount of debt instrument including accrued and unpaid interest (as a percent) |  |  |  |  |  |  | 101.00% |  |
Revolving Credit Facility |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Revolving credit facility |  |  |  |  |  |  | $ 0 |  |
Maximum borrowing capacity |  |  |  | $ 2,200,000 |  |  |  |  |
Increase in maximum borrowing capacity |  |  |  | $ 500,000 |  |  |  |  |
Weighted average interest rate (as a percent) |  |  |  |  |  |  | 1.86% |  |
Remaining availability under credit facility |  |  |  |  |  |  | $ 2,250,000 |  |
Revolving Credit Facility | Minimum |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Remaining period to maturity |  |  |  |  |  |  | 1 year |  |
Exchangeable notes | Subsequent Event |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Aggregate amount of senior notes | $ 575,000 |  |  |  |  |  |  |  |
Term Loan Facility | Subsequent Event |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Payment of debt principal | $ 162,500 |  |  |  |  |  |  |  |
Three-year maturity term loan facility |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Unsecured term loan facility |  |  |  |  | $ 300,000 |  |  |  |
Unsecured debt maturity period |  |  |  |  | 3 years |  |  |  |
Minimum net proceeds of disposed of assets, issued term debt, or issued equity, a requirement to prepay the loan |  |  |  |  | $ 70,000 |  |  |  |
Payment of debt principal |  | $ 300,000 |  |  |  |  |  |  |
Five-year term loan facility |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Weighted average interest rate (as a percent) |  |  |  |  |  |  | 1.76% |  |
Unsecured term loan facility |  |  | $ 325,000 |  |  |  | $ 162,500 |  |
Unsecured debt maturity period |  |  | 5 years |  |  |  |  |  |
Mandatory debt prepayment |  |  | $ 162,500 |  |  |  |  |  |
Commercial paper |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Revolving credit facility |  |  |  |  |  |  | $ 0 |  |
Weighted average interest rate (as a percent) |  |  |  |  |  |  | 1.16% |  |
Commercial paper | Guarantor Subsidiaries |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | $ 2,250,000 |  |  |
Commercial paper | Guarantor Subsidiaries | Maximum |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Debt instrument, maturity term |  |  |  |  |  | 397 days |  |  |

X
- Definition Represents the redemption price of the debt instrument as a percentage of the principal amount and accrued and unpaid interest. + References No definition available. + Details
Name: | nbr_DebtInstrumentRedemptionPriceAsPercentageOfPrincipalAmountAccruedAndUnpaidInterest
Namespace Prefix: | nbr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents Exercisable of Accordian option + References No definition available. + Details
Name: | nbr_ExerciseOfAccordianOption
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of increase in borrowing capacity authorized under the credit facility as per amendment agreement. + References No definition available. + Details
Name: | nbr_LineOfCreditFacilityAuthorizedIncreaseInBorrowingCapacity
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Minimum net proceeds of disposed of assets, issued term debt, or issued equity, a requirement to prepay the loan. + References No definition available. + Details
Name: | nbr_NetProceedsOfDisposalOfAssetsIssuanceOfTermDebtOrEquityMinimum
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the amount of prepayment of loan. + References No definition available. + Details
Name: | nbr_PrepaymentOfLoan
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the maturity period of unsecured debt. + References No definition available. + Details
Name: | nbr_UnsecuredDebtTermOfMaturity
Namespace Prefix: | nbr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
Name: | us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face (par) amount of the original debt instrument that was repurchased. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentRepurchasedFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average interest rate of debt outstanding. + References No definition available. + Details
Name: | us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_LineOfCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityExpirationPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
Name: | us-gaap_ProceedsFromIssuanceOfLongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. + References No definition available. + Details
Name: | us-gaap_RepaymentsOfDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
Name: | us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_UnsecuredDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=us-gaap_GuarantorSubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_SeniorNotesDueTwoZeroOneSixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_SeniorNotesDueTwoZeroTwoThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_SeniorNotesDueTwoZeroOneNineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_SeniorNotesDueTwoZeroOneEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_SeniorNotesDueTwoZeroTwoZeroMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_SeniorNotesDueTwoZeroTwoOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_SeniorNotes5.50PercentageDueTwoZeroTwoThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_ExchangeableSeniorNotesDueJanuary152024Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_TermLoanFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_ThreeYearTermLoanFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_FiveYearTermLoanFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=us-gaap_CommercialPaperMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |