REVOLVING CREDIT FACILITY AND LONG TERM DEBT (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | |
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Dec. 31, 2014
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Dec. 31, 2013
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Line of Credit Facility [Line Items] | ||
Rate of Senior unsecured notes (in hundredths) | 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage | 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage |
Revolving Credit Facility [Member] | ||
Line of Credit Facility [Line Items] | ||
Revolving credit facility, maximum borrowing |
$ 750us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_LineOfCreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |
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Borrowing base |
550nog_LineOfCreditFacilityBorrowingBase / us-gaap_LineOfCreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |
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Borrowings under Credit Facility |
298us-gaap_LineOfCredit / us-gaap_LineOfCreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |
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Remaining borrowing capacity of Credit Facility |
252us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_LineOfCreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |
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Percent of total additional permitted borrowing (in hundredths) |
25.00%nog_PercentOfTotalAdditionalPermittedBorrowing / us-gaap_LineOfCreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |
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Permitted additional indebtedness |
500nog_LineOfCreditFacilityPermittedAdditionalIndebtedness / us-gaap_LineOfCreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |
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Revolving credit facility, maturity date | Sep. 30, 2018 | |
Credit Facility interest rate description | Borrowings under the Revolving Credit Facility can either be at the Alternate Base Rate (as defined) plus a spread ranging from 0.5% to 1.5% or LIBOR borrowings at the Adjusted LIBOR Rate (as defined) plus a spread ranging from 1.5% to 2.5%. The applicable spread at any time is dependent upon the amount of borrowings relative to the borrowing base at such time. The Company may elect, from time to time, to convert all or any part of its LIBOR loans to base rate loans or to convert all or any of the base rate loans to LIBOR loans. A commitment fee is paid on the undrawn balance based on an annual rate of either 0.375% or 0.50%. At December 31, 2014, the commitment fee was 0.5% and the interest rate margin was 2.0% on LIBOR loans and 1.0% on base rate loans. | |
Commitment fee, description | A commitment fee is paid on the undrawn balance based on an annual rate of either 0.375% or 0.50%. | |
Credit facility covenants | The Revolving Credit Facility contains negative covenants that limit the Company’s ability, among other things, to pay any cash dividends, incur additional indebtedness, sell assets, enter into certain hedging contracts, change the nature of its business or operations, merge, consolidate, or make investments. In addition, the Company is required to maintain a current ratio (as defined in the credit agreement) of no less than 1.0 to 1.0 and a ratio of debt (as defined) to EBITDAX (as defined) of no greater than 4.0 to 1.0. | |
Line Of Credit Facility Covenant Terms Current Ratio |
1.0nog_LineOfCreditFacilityCovenantTermsCurrentRatio / us-gaap_LineOfCreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |
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Line Of Credit Facility ratio of debt to EBITDAX |
4.0nog_LineOfCreditFacilityRatioOfDebtToEBITDAX / us-gaap_LineOfCreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |
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Minimum [Member] | Revolving Credit Facility [Member] | ||
Line of Credit Facility [Line Items] | ||
Commitment fee percentage (in hundredths) |
0.375%us-gaap_LineOfCreditFacilityCommitmentFeePercentage / us-gaap_LineOfCreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
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Maximum [Member] | Revolving Credit Facility [Member] | ||
Line of Credit Facility [Line Items] | ||
Commitment fee percentage (in hundredths) |
0.50%us-gaap_LineOfCreditFacilityCommitmentFeePercentage / us-gaap_LineOfCreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
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8.000% Senior Notes Due 2020 [Member] | ||
Line of Credit Facility [Line Items] | ||
Principal amount of Senior unsecured notes |
300us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Rate of Senior unsecured notes (in hundredths) |
8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Maturity date | Jun. 01, 2020 | |
Price of Senior unsecured notes (in hundredths) |
105.25%nog_PriceOfSeniorUnsecuredNotes / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Additional amount of Senior unsecured notes |
200nog_AdditionalAmountOfSeniorUnsecuredNotes / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Net proceeds from issuance of Senior unsecured notes |
291.2nog_NetProceedsFromIssuanceOfSeniorUnsecuredNotes / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Additional net proceeds from issuance of Senior unsecured notes |
200.1nog_AdditionalNetProceedsFromIssuanceOfSeniorUnsecuredNotes / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Percentage of notes that can be redeemed (in hundredths) |
35.00%nog_PercentageOfNotesThatCanBeRedeemed / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Rate of redemption price of notes (in hundredths) |
108.00%nog_RateOfRedemptionPriceOfNotes / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Limitation (in number of days) to redeemed the notes | 180 days | |
Limitation (in percentage of aggregate principal amount of Notes) to redeemed the notes |
65.00%nog_LimitationInPercentageOfAggregatePrincipalAmountOfNotesToRedeemedNotes / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Percentage of notes at redemption prices for prior to June 1, 2016 (in hundredths) |
100.00%nog_PercentageOfNotesAtRedemptionPricesForPriorToJune12016 / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Percentage of notes at redemption prices for the twelve-month period beginning on June 1, 2016 (in hundredths) |
104.00%nog_PercentageOfNotesAtRedemptionPricesForTwelveMonthPeriodBeginningOnJune12016 / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Percentage of notes at redemption prices for the twelve-month period beginning on June 1, 2017 (in hundredths) |
102.00%nog_PercentageOfNotesAtRedemptionPricesForTwelveMonthPeriodBeginningOnJune12017 / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Percentage of notes at redemption prices for beginning on June 1, 2018 (in hundredths) |
100.00%nog_PercentageOfNotesAtRedemptionPricesForBeginningOnJune12018 / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Number of days in default payment of interest | 30 days | |
Payment of certain final judgments |
$ 25nog_PaymentOfCertainFinalJudgments / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
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Number of days related to payment certain final judgments | 60 days | |
LIBOR Loans [Member] | Revolving Credit Facility [Member] | ||
Line of Credit Facility [Line Items] | ||
Interest rate margin in effect during period (in hundredths) |
2.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LineOfCreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_LongtermDebtTypeAxis = nog_LondonInterbankOfferedRateLoansMember |
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Commitment fee percentage (in hundredths) |
0.50%us-gaap_LineOfCreditFacilityCommitmentFeePercentage / us-gaap_LineOfCreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_LongtermDebtTypeAxis = nog_LondonInterbankOfferedRateLoansMember |
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LIBOR Loans [Member] | Minimum [Member] | Revolving Credit Facility [Member] | ||
Line of Credit Facility [Line Items] | ||
Interest rate margin in effect during period (in hundredths) |
1.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LineOfCreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_LongtermDebtTypeAxis = nog_LondonInterbankOfferedRateLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
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LIBOR Loans [Member] | Maximum [Member] | Revolving Credit Facility [Member] | ||
Line of Credit Facility [Line Items] | ||
Interest rate margin in effect during period (in hundredths) |
2.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LineOfCreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_LongtermDebtTypeAxis = nog_LondonInterbankOfferedRateLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
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Alternate Base Rate Loans [Member] | Revolving Credit Facility [Member] | ||
Line of Credit Facility [Line Items] | ||
Interest rate margin in effect during period (in hundredths) |
1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LineOfCreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_LongtermDebtTypeAxis = nog_AlternateBaseRateLoansMember |
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Alternate Base Rate Loans [Member] | Minimum [Member] | Revolving Credit Facility [Member] | ||
Line of Credit Facility [Line Items] | ||
Interest rate margin in effect during period (in hundredths) |
0.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LineOfCreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_LongtermDebtTypeAxis = nog_AlternateBaseRateLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
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Alternate Base Rate Loans [Member] | Maximum [Member] | Revolving Credit Facility [Member] | ||
Line of Credit Facility [Line Items] | ||
Interest rate margin in effect during period (in hundredths) |
1.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LineOfCreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_LongtermDebtTypeAxis = nog_AlternateBaseRateLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
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Additional amount of Senior unsecured notes issued by the entity. No definition available.
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The net proceeds from issuance of additional Senior unsecured notes during the period. No definition available.
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The limitation (in number of days) to redeemed the notes. No definition available.
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The limitation (in percentage of aggregate principal amount of the Notes remains outstanding after such redemption) to redeemed the notes. No definition available.
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The amount of the borrowing capacity as determined semi-annually based upon the company's financial performance and/or assets. No definition available.
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Minimum current ratio to be complied as per the covenant terms. No definition available.
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The permitted additional indebtedness under the revolving credit facility. No definition available.
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Minimum current ratio to be complied as per the no greater covenant terms. No definition available.
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The net proceeds from issuance of Senior unsecured notes during the period. No definition available.
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The number of days in default payment of interest under the debt covenant agreement. No definition available.
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The number of days related to payment of certain final judgments under the debt covenant agreement. No definition available.
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The amount of payment of certain final judgments under the debt covenant agreement. No definition available.
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The rate of redemption price of notes that can be redeemed by the entity beginning on June 1, 2018. No definition available.
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The rate of redemption price of notes that can be redeemed by the entity prior to June 1, 2016. No definition available.
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The rate of redemption price of notes that can be redeemed by the entity beginning on June 1, 2016. No definition available.
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The rate of redemption price of notes that can be redeemed by the entity beginning on June 1, 2017. No definition available.
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The percentage of notes that can be redeemed by the entity. No definition available.
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Percent of total additional permitted borrowing by which the borrowing base on the revolving credit facility will be reduced upon borrowing additional debt. No definition available.
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Entity issued additional senior unsecured notes. No definition available.
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The rate of redemption price of notes that can be redeemed by the entity. No definition available.
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Percentage points added to the reference rate to compute the variable rate on the debt instrument. No definition available.
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Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Description of the fees for amounts available, but unused under the credit facility. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. No definition available.
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Description of the conditions for borrowing under the credit facility including the nature of any restrictions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Date the credit facility terminates, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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