Covenant Compliance, Debt Covenant, Minimum Liquidity

No definition available.

Name:	ne_CovenantComplianceDebtCovenantMinimumLiquidity
Namespace Prefix:	ne_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Covenant, Debt To Total Capitalization Ratio

+ References

No definition available.

+ Details

Name:	ne_DebtCovenantDebtToTotalCapitalizationRatio
Namespace Prefix:	ne_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument Covenant, Percentage Of Combined Book Value Of Assets

+ References

No definition available.

+ Details

Name:	ne_DebtInstrumentCovenantPercentageOfCombinedBookValueOfAssets
Namespace Prefix:	ne_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument Covenant, Percentage Of Revenues

+ References

No definition available.

+ Details

Name:	ne_DebtInstrumentCovenantPercentageOfRevenues
Namespace Prefix:	ne_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Covenant Terms, Rig Value Of Closing Date Rigs, Minimum Each Fiscal Quarter, Ratio

+ References

No definition available.

+ Details

Name:	ne_DebtInstrumentCovenantTermsRigValueOfClosingDateRigsMinimumEachFiscalQuarterRatio
Namespace Prefix:	ne_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Covenant Terms, Rig Value Of Marketed Rigs To Indebtedness, Minimum Each Fiscal Quarter, Ratio

+ References

No definition available.

+ Details

Name:	ne_DebtInstrumentCovenantTermsRigValueOfMarketedRigsToIndebtednessMinimumEachFiscalQuarterRatio
Namespace Prefix:	ne_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Interest Rate, Paid In Cash And Paid-In-Kind, Stated Percentage

+ References

No definition available.

+ Details

Name:	ne_DebtInstrumentInterestRatePaidInCashAndPaidInKindStatedPercentage
Namespace Prefix:	ne_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Interest Rate, Paid In Cash, Stated Percentage

+ References

No definition available.

+ Details

Name:	ne_DebtInstrumentInterestRatePaidInCashStatedPercentage
Namespace Prefix:	ne_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Interest Rate, Paid-In-Kind, Stated Percentage

+ References

No definition available.

+ Details

Name:	ne_DebtInstrumentInterestRatePaidInKindStatedPercentage
Namespace Prefix:	ne_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Principal Payment Due, Percentage

+ References

No definition available.

+ Details

Name:	ne_DebtInstrumentPrincipalPaymentDuePercentage
Namespace Prefix:	ne_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Restrictive Covenants, Maximum Available Cash After Borrowings

+ References

No definition available.

+ Details

Name:	ne_DebtInstrumentRestrictiveCovenantsMaximumAvailableCashAfterBorrowings
Namespace Prefix:	ne_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line Of Credit Facility, Covenant Compliance, Maximum Consolidated Leverage Ratio.

+ References

No definition available.

+ Details

Name:	ne_LineOfCreditFacilityCovenantComplianceMaximumConsolidatedLeverageRatio.
Namespace Prefix:	ne_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Line Of Credit Facility, Senior Guaranteed Indebtedness To Adjusted EBITDA Ratio Covenant

+ References

No definition available.

+ Details

Name:	ne_LineOfCreditFacilitySeniorGuaranteedIndebtednessToAdjustedEBITDARatioCovenant
Namespace Prefix:	ne_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line of Credit Facility, Accordion Feature, Increase Limit

+ References

No definition available.

+ Details

Name:	ne_LineofCreditFacilityAccordionFeatureIncreaseLimit
Namespace Prefix:	ne_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRepurchaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

- 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

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

Name:	us-gaap_ExtinguishmentOfDebtAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The difference between the reacquisition price and the net carrying amount of the extinguished debt recognized currently as a component of income in the period of extinguishment, net of tax.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629

+ Details

Name:	us-gaap_ExtinguishmentOfDebtGainLossNetOfTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

+ Details

Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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://fasb.org/us-gaap/role/ref/legacyRef
-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://fasb.org/us-gaap/role/ref/legacyRef
-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

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-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=119400593&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-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=119400593&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-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

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-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

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash outflow for acquisition of machinery and equipment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireMachineryAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow from amounts received from issuance of long-term debt that is wholly or partially secured by collateral. Excludes proceeds from tax exempt secured debt.

+ References

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfSecuredDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_ProceedsFromLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585

+ Details

Name:	us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=ne_MaritimeEquipmentNobleJoeKnightMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=ne_MaritimeEquipmentNobleJohnnyWhitstineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ne_The2017CreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ne_SellerLoanDueFebruary2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ne_SellerLoanDueSeptember2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ne_SellerLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ne_The2015CreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=ne_LettersOfCreditAndSuretyBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

Debt - Additional Information (Details)				1 Months Ended				3 Months Ended			12 Months Ended		18 Months Ended
Debt - Additional Information (Details)	Apr. 20, 2020 USD ($)	Dec. 20, 2019 USD ($)	Feb. 28, 2019 USD ($)	Apr. 30, 2020 USD ($)	Mar. 31, 2019 USD ($)	Feb. 28, 2019 USD ($)	Sep. 30, 2018 USD ($)	Mar. 31, 2022	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2021	Dec. 31, 2019 USD ($)	Dec. 31, 2020	Apr. 23, 2020 USD ($)	Jul. 31, 2019 USD ($)	Jan. 31, 2018 USD ($)	Jan. 03, 2018 USD ($)	Dec. 21, 2017
Debt Instrument [Line Items]
Borrowings on credit facilities									$ 110,000,000	$ 350,000,000
Term of debt instrument						4 years	4 years
Repayments of debt									0	400,000,000
Gain on extinguishment of debt, net									0	31,266,000
Noble Joe Knight
Debt Instrument [Line Items]
Purchase price of asset acquired			$ 83,800,000			$ 83,800,000
Noble Johnny Whitstine
Debt Instrument [Line Items]
Purchase price of asset acquired							$ 93,800,000
2017 Credit Facility matures January 2023 \| Maximum
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount															$ 1,500,000,000
2017 Credit Facility matures January 2023 \| Minimum
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount															$ 1,300,000,000
2017 Credit Facility matures January 2023 \| Forecast
Debt Instrument [Line Items]
Line of credit facility covenant compliance maximum consolidated leverage ratio								3.0			3.5		4.0
2019 Seller Loan
Debt Instrument [Line Items]
Financed value			$ 53,600,000			$ 53,600,000
2019 Seller Loan \| Due at End of Third-Year
Debt Instrument [Line Items]
Term of debt instrument						4 years
Percentage of principal payment due at end of term			5.00%			5.00%
2019 Seller Loan \| Due at End of Four-Year Term
Debt Instrument [Line Items]
Percentage of principal payment due at end of term			95.00%			95.00%
2018 Seller Loan
Debt Instrument [Line Items]
Financed value							$ 60,000,000.0
2018 Seller Loan \| Due at End of Third-Year
Debt Instrument [Line Items]
Percentage of principal payment due at end of term							5.00%
2018 Seller Loan \| Due at End of Four-Year Term
Debt Instrument [Line Items]
Percentage of principal payment due at end of term							95.00%
Line of credit \| 2017 Credit Facility matures January 2023
Debt Instrument [Line Items]
Maximum borrowing capacity under credit facilities									1,300,000,000
Net loss due to reduction of aggregate principal amount												$ 700,000
Current borrowing capacity									$ 397,800,000
Percentage of revenues									85.00%
Percentage of combined book value of assets									85.00%
Senior unsecured notes
Debt Instrument [Line Items]
Purchase of senior notes					$ 440,900,000					440,900,000
Repurchase amount					400,000,000.0					$ 400,000,000.0
Gain on extinguishment of debt, net					$ 31,300,000
Secured loan \| 2019 Seller Loan
Debt Instrument [Line Items]
Interest rate			4.25%			4.25%
Interest rate paid-in-kind			1.25%			1.25%
Interest rate on first year			8.91%			8.91%
Secured loan \| 2018 Seller Loan
Debt Instrument [Line Items]
Term of debt instrument							4 years
Interest rate							4.25%
Interest rate paid-in-kind							1.25%
Interest rate on first year							8.91%
Debt to total capitalization ratio requirement							0.55
Secured loan \| Seller-financed loans
Debt Instrument [Line Items]
Covenant, minimum liquidity							$ 300,000,000.0
Credit facility \| 2015 Credit Facility matures January 2020
Debt Instrument [Line Items]
Maximum borrowing capacity under credit facilities																$ 300,000,000.0
Extinguished aggregate principal amount		$ 300,000,000.0
Credit facility \| Line of credit \| 2017 Credit Facility matures January 2023
Debt Instrument [Line Items]
Credit facility, ability to increase (up to)									$ 500,000,000.0
Covenant, rig value of closing date rigs, end of each fiscal quarter									0.80
Covenant, restrictions on borrowings, maximum Available Cash									$ 200,000,000.0
Indentured Secured Debt Basket, percentage of CNTA									15.00%
Covenant, minimum liquidity																	$ 300,000,000.0
Covenant, rig value of marketed rigs to indebtedness, end of each fiscal quarter																		3.00
Credit facility \| Line of credit \| 2017 Credit Facility matures January 2023 \| LIBOR \| Maximum
Debt Instrument [Line Items]
Interest rate on senior notes									4.25%
Letters of credit \| Line of credit \| 2017 Credit Facility matures January 2023
Debt Instrument [Line Items]
Maximum borrowing capacity under credit facilities									$ 445,000,000.0
Current borrowing capacity									15,000,000.0
Borrowings outstanding or letters of credit issued									5,500,000
Letters of credit and surety bonds \| Line of credit
Debt Instrument [Line Items]
Borrowings outstanding or letters of credit issued									$ 11,700,000
Subsequent Event \| Line of credit \| 2017 Credit Facility matures January 2023
Debt Instrument [Line Items]
Current borrowing capacity														$ 1,050,000,000.00
Borrowings on credit facilities				$ 100,000,000.0
Borrowings outstanding or letters of credit issued														545,000,000.0
Remaining borrowing capacity														$ 297,800,000
Subsequent Event \| Secured loan \| 2019 Seller Loan
Debt Instrument [Line Items]
Repayments of debt	$ 48,100,000
Subsequent Event \| Secured loan \| 2018 Seller Loan
Debt Instrument [Line Items]
Repayments of debt	53,600,000
Subsequent Event \| Secured loan \| Seller-financed loans
Debt Instrument [Line Items]
Percentage of principal payment due at end of term				85.00%
Long-term debt	$ 1.00