XML 103 R84.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Common Shares (Details) (USD $) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2014 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Common Shares |  |  |  |
Shares purchased |  | 10,375,000 us-gaap_StockRepurchasedDuringPeriodShares | 0 us-gaap_StockRepurchasedDuringPeriodShares | 0 us-gaap_StockRepurchasedDuringPeriodShares
Share price of shares purchased (in dollars per share) |  | $ 24.100 us-gaap_SharePrice |  |
Total aggregate amount of shares purchased |  | $ 250,000,000 us-gaap_StockRepurchasedDuringPeriodValue |  |
Preferred shares, shares issued |  | 0 us-gaap_PreferredStockSharesIssued |  |
Issuance of common shares for stock options exercised (in shares) |  | 3,000,000 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised | 600,000 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised | 1,100,000 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Proceeds from stock options exercised |  | 30,300,000 us-gaap_ProceedsFromStockOptionsExercised | 5,400,000 us-gaap_ProceedsFromStockOptionsExercised | 17,400,000 us-gaap_ProceedsFromStockOptionsExercised
Amount paid to repurchase surrendered unexercised vested options to satisfy exercise price and related tax withholding obligations |  |  | 21,000,000 nbr_ShareBasedCompensationPaymentsToRepurchaseVestedOptions |
Common stock dividend declared (in dollars per share) | $ 0.06 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.04 us-gaap_CommonStockDividendsPerShareDeclared |  |
Cash dividends paid |  | 59,145,000 us-gaap_PaymentsOfDividends | 47,168,000 us-gaap_PaymentsOfDividends |
Officers and Directors |  |  |  |
Common Shares |  |  |  |
Restricted stock awarded to executive officers, key employees & directors |  | 1,926,861 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_TitleOfIndividualAxis = nbr_OfficersAndDirectorsMember | 4,847,376 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_TitleOfIndividualAxis = nbr_OfficersAndDirectorsMember | 944,015 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_TitleOfIndividualAxis = nbr_OfficersAndDirectorsMember
Restricted shares awarded, average market price (in dollars per share) |  | $ 19.53 nbr_AverageMarketPriceOfRestrictedShares / us-gaap_TitleOfIndividualAxis = nbr_OfficersAndDirectorsMember | $ 16.28 nbr_AverageMarketPriceOfRestrictedShares / us-gaap_TitleOfIndividualAxis = nbr_OfficersAndDirectorsMember | $ 20.69 nbr_AverageMarketPriceOfRestrictedShares / us-gaap_TitleOfIndividualAxis = nbr_OfficersAndDirectorsMember
Employees |  |  |  |
Common Shares |  |  |  |
Issuance of common shares for stock options exercised (in shares) |  |  | 1,284 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_TitleOfIndividualAxis = nbr_EmployeesMember | 807,142 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_TitleOfIndividualAxis = nbr_EmployeesMember
Value of surrendered unexercised vested stock options |  |  |  | $ 79,600,000 nbr_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsSurrenderedInPeriodValue / us-gaap_TitleOfIndividualAxis = nbr_EmployeesMember

X
- Definition Average market price related to Restricted Stock Awards issued during the period. + References No definition available. + Details
Name: | nbr_AverageMarketPriceOfRestrictedShares
Namespace Prefix: | nbr_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents value of unexercised vested stock options that were surrendered to satisfy the option exercise price and related income taxes. + References No definition available. + Details
Name: | nbr_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsSurrenderedInPeriodValue
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount paid to repurchase surrendered unexercised vested options to satisfy exercise price and related tax withholding obligations. + References No definition available. + Details
Name: | nbr_ShareBasedCompensationPaymentsToRepurchaseVestedOptions
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsOfDividends
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. + 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 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
Name: | us-gaap_PreferredStockSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromStockOptionsExercised
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Price of a single share of a number of saleable stocks of a company. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
Name: | us-gaap_SharePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of share options (or share units) exercised during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28,29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_StockRepurchasedDuringPeriodShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 + Details
Name: | us-gaap_StockRepurchasedDuringPeriodValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=nbr_EmployeesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=nbr_OfficersAndDirectorsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |