Goodrich Petroleum 10-Q 6 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	4-May-15
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	GDP
Entity Registrant Name	GOODRICH PETROLEUM CORP
Entity Central Index Key	943861
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		57,167,476

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
CURRENT ASSETS:
Cash and cash equivalents	$6,426	$8
Accounts receivable, trade and other, net of allowance	9,084	12,993
Accrued oil and natural gas revenue	8,819	15,128
Fair value of oil and natural gas derivatives	38,504	47,444
Inventory	1,597	1,383
Prepaid expenses and other	893	1,340
Total current assets	65,323	78,296
PROPERTY AND EQUIPMENT:
Oil and natural gas properties (successful efforts method)	1,526,303	1,478,042
Furniture, fixtures and equipment	7,656	7,645
Property, Plant and Equipment, Gross, Total	1,533,959	1,485,687
Less: Accumulated depletion, depreciation and amortization	-893,345	-871,082
Net property and equipment	640,614	614,605
Deferred tax assets	13,396	16,488
Deferred financing cost and other	14,821	12,749
TOTAL ASSETS	734,154	722,138
CURRENT LIABILITIES:
Accounts payable	71,030	86,823
Accrued liabilities	31,791	54,143
Accrued abandonment costs	145	145
Deferred tax liabilities current	13,396	16,488
Fair value of oil and natural gas derivatives	152	102
Total current liabilities	116,514	157,701
Long-term debt	585,591	568,625
Accrued abandonment costs	6,506	6,365
Fair value of oil and natural gas derivatives	139	464
Transportation obligation	4,090	4,127
Other non-current liability	656	630
Total liabilities	713,496	737,912
Commitments and contingencies (See Note 8)
STOCKHOLDERS’ EQUITY:
Common stock: $0.20 par value, 100,000,000 shares authorized; issued and outstanding 57,111,742 and 45,105,205 shares, respectively	11,422	9,021
Additional paid in capital	1,129,350	1,066,770
Retained earnings (accumulated deficit)	-1,122,373	-1,093,824
Total stockholders’ equity (deficit)	20,658	-15,774
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	734,154	722,138
Series B Convertible Preferred Stock
STOCKHOLDERS’ EQUITY:
Preferred stock	2,250	2,250
Series C Cumulative Preferred Stock
STOCKHOLDERS’ EQUITY:
Preferred stock	4	4
Series D Cumulative Preferred Stock
STOCKHOLDERS’ EQUITY:
Preferred stock	$5	$5

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, par value	$1	$1
Common stock, par value	$0.20	$0.20
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	57,111,742	45,105,205
Common stock, shares outstanding	57,111,742	45,105,205
Series B Convertible Preferred Stock
Preferred stock, shares issued	2,249,893	2,249,893
Preferred stock, shares outstanding	2,249,893	2,249,893
Series C Cumulative Preferred Stock
Preferred stock, shares issued	4,400	4,400
Preferred stock, shares outstanding	4,400	4,400
Series D Cumulative Preferred Stock
Preferred stock, shares issued	5,200	5,200
Preferred stock, shares outstanding	5,200	5,200

Consolidated_Statements_Of_Ope

Consolidated Statements Of Operations (Unaudited) (USD $)	3 Months Ended
Share data in Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
REVENUES:
Oil and natural gas revenues	$24,143,000	$51,800,000
Other	-113,000	3,000
Total revenues	24,030,000	51,803,000
OPERATING EXPENSES:
Lease operating expense	4,138,000	8,617,000
Production and other taxes	1,409,000	2,441,000
Transportation and processing	1,247,000	2,372,000
Depreciation, depletion and amortization	20,233,000	29,238,000
Exploration	3,658,000	2,317,000
General and administrative	7,751,000	8,941,000
Gain on sale of assets	-892,000
Other	-45,000
Operating Expenses, Total	37,499,000	53,926,000
Operating loss	-13,469,000	-2,123,000
OTHER INCOME (EXPENSE):
Interest expense	-12,079,000	-11,878,000
Interest income and other		10,000
Gain (loss) on derivatives not designated as hedges	4,430,000	-8,501,000
Nonoperating Income (Expense), Total	-7,649,000	-20,369,000
Loss before income taxes	-21,118,000	-22,492,000
Income tax benefit	0
Net loss	-21,118,000	-22,492,000
Preferred stock dividends	7,431,000	7,431,000
Net loss applicable to common stock	($28,549,000)	($29,923,000)
PER COMMON SHARE
Net loss applicable to common stock—basic	($0.58)	($0.68)
Net loss applicable to common stock—diluted	($0.58)	($0.68)
Weighted average common shares outstanding—basic	49,110	44,273
Weighted average common shares outstanding—diluted	49,110	44,273

Consolidated_Statements_Of_Cas

Consolidated Statements Of Cash Flows (Unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	($21,118)	($22,492)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depletion, depreciation and amortization	20,233	29,238
(Gain) loss on derivatives not designated as hedges	-4,430	8,501
Net cash received (paid) in settlement of derivative instruments	13,094	-2,731
Amortization of leasehold costs	2,160	1,647
Share based compensation (non-cash)	1,886	2,350
Exploration cost	177	44
Amortization of finance cost, debt discount and accretion	2,092	2,632
Amortization of transportation obligation	189	210
Gain on sale of assets	-892
Change in assets and liabilities:
Accounts receivable, trade and other, net of allowance	3,893	-4,112
Accrued oil and natural gas revenue	6,309	-2,157
Inventory	-214	96
Prepaid expenses and other	475	362
Accounts payable	-15,851	7,333
Accrued liabilities	-2,286	-14,366
Net cash provided by operating activities	5,717	6,555
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	-68,354	-58,154
Proceeds from sale of assets	777	625
Net cash used in investing activities	-67,577	-57,529
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from bank borrowings	97,000	15,000
Principal payments of bank borrowings	-166,000	-5,000
Proceeds from Second Lien Notes	100,000
Proceeds from equity offering	47,986
Preferred stock dividends	-7,431	-7,431
Debt issuance costs	-3,027	-5
Other	-250
Net cash provided by financing activities	68,278	2,564
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	6,418	-48,410
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	8	49,220
CASH AND CASH EQUIVALENTS, END OF PERIOD	$6,426	$810

Description_of_Business_and_Si

Description of Business and Significant Accounting Policies

3 Months Ended

Mar. 31, 2015

Accounting Policies [Abstract]

Description of Business and Significant Accounting Policies

NOTE 1—Description of Business and Significant Accounting Policies

Goodrich Petroleum Corporation (together with its subsidiary, “we,” “our,” or the “Company”) is an independent oil and natural gas company engaged in the exploration, development and production of oil and natural gas on properties primarily in (i) Southwest Mississippi and Southeast Louisiana, which includes the Tuscaloosa Marine Shale Trend (“TMS”), (ii) South Texas, which includes the Eagle Ford Shale Trend and (iii) Northwest Louisiana and East Texas, which includes the Haynesville Shale Trend.

Liquidity and Capital Resources—We are an exploration and production Company with interests in non-conventional oil shale properties that require large investments of capital to develop.  Our immediate capital resources to develop our properties come from cash on hand, operating cash flows and borrowings on our Senior Credit Facility. The current significant decline in crude oil prices and to a lesser extent the continued depressed natural gas prices has negatively impacted our cash flows that enable us to invest in and maintain our properties and service our long term obligations.

We have taken the following steps in the three months ended March 31, 2015 to mitigate the effects of the abnormally low crude oil prices on our operations:

1. We have significantly reduced our capital expenditures planned for 2015 thereby conserving capital.

2. We have extended the maturity of our Senior Credit Facility to February 24, 2017.

3. We have received proceeds from our issuance of $100 million Second Lien Notes.

4. We have received proceeds of $48 million from the sale of 12,000,000 shares of our common stock to the public.

5. We have reduced our staff headcount by 18% from year-end 2014 levels thereby reducing expenses.

Additionally, we have approximately 70% of our remaining projected 2015 oil production favorably hedged.

We have other resource options to enhance liquidity as well, such as selling non-core properties, entering into joint venture in our core areas and/or further reducing our planned capital expenditures.

As a result of the steps we have taken to enhance our liquidity, we anticipate cash from operations, cash on hand and available borrowing capacity will be sufficient to meet our investing, financing, and working capital requirements through the end of 2015, however the effects of an extended period of low commodity prices will require us to take further cost cutting measures.

Principles of Consolidation— The consolidated financial statements of the Company included in this Quarterly Report on Form 10-Q have been prepared, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) and accordingly, certain information normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (“US GAAP”) has been condensed or omitted. The consolidated financial statements include the financial statements of the Company and its wholly-owned subsidiary. Intercompany balances and transactions have been eliminated in consolidation. The consolidated financial statements reflect all normal recurring adjustments that, in the opinion of management, are necessary for a fair presentation. Certain data in prior periods’ financial statements have been adjusted to conform to the presentation of the current period. We have evaluated subsequent events through the date of this filing.

Use of Estimates—Our management has made a number of estimates and assumptions relating to the reporting of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities to prepare these consolidated financial statements in conformity with US GAAP.

Cash and Cash Equivalents—Cash and cash equivalents includes cash on hand, demand deposit accounts and temporary cash investments with maturities of ninety days or less at the date of purchase.

Property and Equipment—As of March 31, 2015, we had interests in oil and natural gas properties totaling $639.3 million, net of accumulated depletion, which we account for under the successful efforts method. Under this method, costs of acquiring unproved and proved oil and natural gas leasehold acreage are capitalized. When proved reserves are found on an unproved property, the associated leasehold cost is transferred to proved properties. Significant unproved leases are reviewed periodically, and a valuation allowance is provided for any estimated decline in value. Costs of all other unproved leases are amortized over the estimated average holding period of the leases. Development costs are capitalized, including the costs of unsuccessful development wells.

Impairment—We periodically assess our long-lived assets recorded in oil and natural gas properties on the Consolidated Balance Sheets to ensure that they are not carried in excess of fair value, which is computed using level 3 inputs such as discounted cash flow models or valuations, based on estimated future commodity prices and our various operational assumptions. An evaluation is performed on a field-by-field basis at least annually or whenever changes in facts and circumstances indicate that our oil and natural gas properties may be impaired.

Fair Value Measurement—Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value of an asset should reflect its highest and best use by market participants, whether in-use or an in-exchange valuation premise. The fair value of a liability should reflect the risk of nonperformance, which includes, among other things, our credit risk.

We use various methods, including the income approach and market approach, to determine the fair values of our financial instruments that are measured at fair value on a recurring basis, which depend on a number of factors, including the availability of observable market data over the contractual term of the underlying instrument. For some of our instruments, the fair value is calculated based on directly observable market data or data available for similar instruments in similar markets. For other instruments, the fair value may be calculated based on these inputs as well as other assumptions related to estimates of future settlements of these instruments. We separate our financial instruments into three levels (levels 1, 2 and 3) based on our assessment of the availability of observable market data and the significance of non-observable data used to determine the fair value of our instruments. Our assessment of an instrument can change over time based on the maturity or liquidity of the instrument, which could result in a change in the classification of the instruments between levels.

Each of these levels and our corresponding instruments classified by level are further described below:

●

Level 1 Inputs— unadjusted quoted market prices in active markets for identical assets or liabilities. Included in this level are our senior notes;

●

Level 2 Inputs— quotes which are derived principally from or corroborated by observable market data. Included in this level are our bank debt and commodity derivatives whose fair values are based on third-party quotes or available interest rate information and commodity pricing data obtained from third party pricing sources and our creditworthiness or that of our counterparties; and

●

Level 3 Inputs— unobservable inputs for the asset or liability, such as discounted cash flow models or valuations, based on our various assumptions and future commodity prices. Included in this level would be acquisitions and impairments of oil and natural gas properties.

As of March 31, 2015 and December 31, 2014, the carrying amounts of our cash and cash equivalents, trade receivables and payables represented fair value because of the short-term nature of these instruments.

The following table summarizes the fair value of our financial instruments and long lived assets that are recorded or disclosed at fair value classified in each level as of March 31, 2015:

Fair Value Measurements as of March 31, 2015

(in thousands)

Description

Level 1

Level 2

Level 3

Total

Recurring Fair Value Measurements

Commodity Derivatives (see Note 6)

$

—

$

38,213

$

—

$

38,213

Debt (see Note 3)

(240,893

)

(52,000

)

(58,943

)

(351,836

)

Total recurring fair value measurements

$

(240,893

)

$

(13,787

)

$

(58,943

)

$

(313,623

)

Depreciation—Depreciation and depletion of producing oil and natural gas properties is calculated using the units-of-production method. Proved developed reserves are used to compute unit rates for unamortized tangible and intangible development costs, and proved reserves are used for unamortized leasehold costs. Gains and losses on disposals or retirements that are significant or include an entire depreciable or depletable property unit are included in operating income. Depreciation of furniture, fixtures and equipment, consisting of office furniture, computer hardware and software and leasehold improvements, is computed using the straight-line method over their estimated useful lives, which vary from three to five years.

Transportation Obligation—We entered into a natural gas gathering agreement with an independent service provider, effective July 27, 2010. The agreement is scheduled to remain in effect for a period of ten years and requires the service provider to construct pipelines and facilities to connect our wells to the service provider’s gathering system in our Eagle Ford Shale Trend area of South Texas. In compensation for the services, we agreed to pay the service provider 110% of the total capital cost incurred by the service provider to construct new pipelines and facilities. The service provider bills us for 20% of the accumulated unpaid capital costs annually. The transportation obligation liability was $5.4 million as of each of March 31, 2015 and December 31, 2014.

We accounted for the agreement by recording a long-term asset, included in “Deferred financing cost and other” on the Consolidated Balance Sheets. The asset is being amortized using the units-of-production method and the amortization expense is included in “Transportation and processing” on the Consolidated Statements of Operations. The related current and long-term liabilities are presented on the Consolidated Balance Sheets in “Accrued liabilities” and “Transportation obligation”, respectively.

Asset Retirement Obligations—Asset retirement obligations are related to the abandonment and site restoration requirements that result from the exploration and development of our oil and gas properties. We record the fair value of a liability for an asset retirement obligation in the period in which it is incurred and a corresponding increase in the carrying amount of the related long-lived asset. Accretion expense is included in “Depreciation, depletion and amortization” on our Consolidated Statements of Operations. See Note 2.

Revenue Recognition—Oil and natural gas revenues are recognized when production is sold to a purchaser at a fixed or determinable price, when delivery has occurred and title has transferred, and if collectability of the revenue is probable. Revenues from the production of crude oil and natural gas properties in which we have an interest with other producers are recognized using the entitlements method. We record a liability or an asset for natural gas balancing when we have sold more or less than our working interest share of natural gas production, respectively. At March 31, 2015 and December 31, 2014, the net liability for natural gas balancing was immaterial. Differences between actual production and net working interest volumes are routinely adjusted.

Derivative Instruments—We use derivative instruments such as futures, forwards, options, collars and swaps for purposes of hedging our exposure to fluctuations in the price of crude oil and natural gas and to hedge our exposure to changing interest rates. Accounting standards related to derivative instruments and hedging activities require that all derivative instruments subject to the requirements of those standards be measured at fair value and recognized as assets or liabilities in the balance sheet. We offset the fair value of our asset and liability positions with the same counterparty for each commodity type. Changes in fair value are required to be recognized in earnings unless specific hedge accounting criteria are met. All our realized gain or losses on our derivative contracts are the result of cash settlements. We have not designated any of our derivative contracts as hedges; accordingly, changes in fair value are reflected in earnings. See Note 6.

Income or Loss Per Share—Basic income (loss) per common share is computed by dividing net income (loss) applicable to common stockholders for each reporting period by the weighted-average number of common shares outstanding during the period. Diluted income (loss) per common share is computed by dividing net income (loss) applicable to common stockholders for each reporting period by the weighted average number of common shares outstanding during the period, plus the effects of potentially dilutive stock options, stock warrants and restricted stock calculated using the Treasury Stock method and the potential dilutive effect of the conversion of shares associated with our 5.375% Series B Convertible Preferred Stock (“Series B Preferred Stock”), 3.25% Convertible Senior Notes due 2026 (the “2026 Notes”), 5% Convertible Senior Notes due 2029 (the “2029 Notes”) and 5% Convertible Senior Notes due 2032 (the “2032 Notes”). See Note 4.

Commitments and Contingencies—Liabilities for loss contingencies, including environmental remediation costs, arising from claims, assessments, litigation, fines and penalties, and other sources are recorded when it is probable that a liability has been incurred and the amount of the assessment and/or remediation can be reasonably estimated. Recoveries from third parties, when probable of realization, are separately recorded and are not offset against the related environmental liability.

Guarantees—On March 2, 2011, we issued and sold $275 million aggregate principal amount of our 8.875% Senior Notes due 2019 (the “2019 Notes”). Upon issuance of the guarantee related to the 2019 Notes, our subsidiary also became a guarantor on our outstanding 2029 Notes and our 2026 Notes, pursuant to the respective indentures governing the 2029 Notes and 2026 Notes. On August 26, 2013 and October 1, 2013, we issued $109.25 million and $57.0 million, respectively, aggregate principal amount of our 2032 Notes, which are also guaranteed by our subsidiary pursuant to the terms of the indenture governing the 2032 Notes. The 2019 Notes, 2029 Notes, 2026 Notes and 2032 Notes are guaranteed on a senior unsecured basis by our 100% owned subsidiary, Goodrich Petroleum Company, L.L.C. On March 12, 2015 we issued and sold $100 million aggregate principal amount of our 8% Second Lien Senior Secured Notes due 2018 (the “Second Lien Notes”) and upon issuance our subsidiary became the guarantor of the Second Lien Notes under the governing indenture.

Goodrich Petroleum Corporation, as the parent company (the “Parent Company”), has no independent assets or operations. The guarantees are full and unconditional, subject to customary exceptions pursuant to the indentures governing our 2019 Notes, 2026 Notes, 2029 Notes and 2032 Notes, as discussed below. The Parent Company has no other subsidiaries. In addition, there are no restrictions on the ability of the Parent Company to obtain funds from its subsidiary by dividend or loan. Finally, the Parent Company’s wholly-owned subsidiary does not have restricted assets that exceed 25% of net assets as of the most recent fiscal year end that may not be transferred to the Parent Company in the form of loans, advances or cash dividends by the subsidiary without the consent of a third party.

Guarantees of the 2019 Notes will be released under certain circumstances, including in the event a Subsidiary Guarantor (as defined in the indenture governing the 2019 Notes) is sold or disposed of (whether by merger, consolidation, the sale of its capital stock or the sale of all or substantially all of its assets (other than by lease)) and whether or not the Subsidiary Guarantor is the surviving entity in such transaction to a person which is not the Parent Company or a Restricted Subsidiary of the Parent Company, such Subsidiary Guarantor will be released from its obligations under its Subsidiary Guarantee if the sale or other disposition does not violate the covenants described under “Limitation on Sales of Assets and Subsidiary Stock” in the indenture governing the 2019 Notes. In addition, a Subsidiary Guarantor will be released from its obligations under the indenture and its guarantee if such Subsidiary Guarantor ceases to guarantee any other indebtedness of the Parent Company or a Subsidiary Guarantor under a credit facility, and is not a borrower under the Senior Secured Credit Agreement, provided no Event of Default (as defined in the indenture governing the 2019 Notes) has occurred and is continuing; or if the Parent Company designates such subsidiary as an Unrestricted Subsidiary and such designation complies with the other applicable provisions of the indenture or if such subsidiary otherwise no longer meets the definition of a Restricted Subsidiary; or in connection with any covenant defeasance, legal defeasance or satisfaction and discharge of the 2019 Notes in accordance with the indenture.

Guarantees of the 2032 Notes, 2029 Notes and 2026 Notes will be released if the Subsidiary Guarantor no longer guarantees the 2019 Notes, if the Subsidiary Guarantor is dissolved or liquidated, if the Subsidiary Guarantor is no longer the Parent Company’s subsidiary or upon satisfaction and discharge of the 2032 Notes, 2029 Notes or 2026 Notes in accordance with their respective indentures.

Guarantees of the Second Lien Notes will be released under certain circumstances, including in the event a Subsidiary Guarantor is sold or disposed of (whether by merger, consolidation, the sale of its capital stock or the sale of all or substantially all of its assets (other than by lease)) and whether or not the Subsidiary Guarantor is the surviving entity in such transaction to a person which is not the Parent Company or a Restricted Subsidiary of the Parent Company, such Subsidiary Guarantor will be released from its obligations under its Subsidiary Guarantee if the sale or other disposition does not violate the covenants described under “Limitation on Sales of Assets and Subsidiary Stock” in the indenture governing the Second Lien Notes. In addition, a Subsidiary Guarantor will be released from its obligations under the indenture and its guarantee if such Subsidiary Guarantor ceases to guarantee any other indebtedness of the Parent Company or a Subsidiary Guarantor, provided no Event of Default (as defined in the indenture governing the Second Lien Notes) has occurred and is continuing; or if the Parent Company designates such subsidiary as an Unrestricted Subsidiary and such designation complies with the other applicable provisions of the indenture or if such subsidiary otherwise no longer meets the definition of a Restricted Subsidiary; or in connection with any covenant defeasance, legal defeasance or satisfaction and discharge of the Second Lien Notes in accordance with the indenture.

New Accounting Pronouncements

In April 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2015-03, Interest-Imputation of Interest, which seeks to simplify presentation of debt issuance costs. The ASU requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The recognition and measurement guidance for debt issuance costs are not affected by the amendments in this ASU. Entities should apply the amendments in this ASU on a retrospective basis, wherein the balance sheet of each individual period presented should be adjusted to reflect the period-specific effects of applying the new guidance. For public entities, this ASU is effective for annual reporting periods beginning after December 15, 2015, including interim periods within that reporting period. The Company is currently evaluating the provisions of this ASU and assessing the impact, it may have on our consolidated financial statements.

On January 9, 2015, the FASB issued ASU 2015-01, which eliminates the concept of “extraordinary” items from US GAAP.  The ASU is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. A reporting entity may apply the amendments prospectively. A reporting entity also may apply the amendments retrospectively to all prior periods presented in the financial statements. Early adoption is permitted, provided that the guidance is applied from the beginning of the fiscal year of adoption. The adoption of this guidance is not expected to have an impact on the Company’s consolidated financial statements.

On August 27, 2014, the FASB issued ASU 2014-15, which provides guidance on determining when and how to disclose going-concern uncertainties in the financial statements. The new standard requires management to perform interim and annual assessments of the Company’s ability to continue as a going concern within one year of the date the financial statements are issued. An entity must provide certain disclosures if conditions or events raise substantial doubt about the entity’s ability to continue as a going concern. The ASU applies to all entities and is effective for annual periods ending after December 15, 2016, and interim periods thereafter, with early adoption permitted.

In May 2014, the FASB issued ASU 2014-09 that introduces a new five-step revenue recognition model in which an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This ASU also requires disclosures sufficient to enable users to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers, including qualitative and quantitative disclosures about contracts with customers, significant judgments and changes in judgments, and assets recognized from the costs to obtain or fulfill a contract. This standard is effective for fiscal years beginning after December 15, 2016, including interim periods within that reporting period. The Company is currently evaluating the new guidance to determine the impact it will have on its consolidated financial statements.

Asset_Retirement_Obligations

Asset Retirement Obligations	3 Months Ended
	Mar. 31, 2015
Asset Retirement Obligation Disclosure [Abstract]
Asset Retirement Obligations	NOTE 2—Asset Retirement Obligations
	The reconciliation of the beginning and ending asset retirement obligation for the period ending March 31, 2015 is as follows (in thousands):
		March 31,
		2015
	Beginning balance at December 31, 2014	$	6,510
	Liabilities incurred		11
	Revisions in estimated liabilities		—
	Liabilities settled		—
	Accretion expense		130
	Dispositions		—
	Ending balance	$	6,651
	Current liability	$	145
	Long term liability	$	6,506

Debt

Debt	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Debt	NOTE 3—Debt
	Debt consisted of the following balances as of the dates indicated (in thousands):
		31-Mar-15							31-Dec-14
		Principal		Carrying			Fair		Principal			Carrying		Fair
				Amount			Value (1)					Amount		Value (1)
	Senior Credit Facility	$	52,000	$	52,000		$	52,000	$	121,000		$	121,000	$	121,000
	3.25% Convertible Senior Notes due 2026		429		429			107		429			429		353
	5.0% Convertible Senior Notes due 2029 (2)		6,692		6,692			2,543		6,692			6,692		3,480
	5.0% Convertible Senior Notes due 2032 (3)		171,620		166,796			97,993		170,770			165,504		87,093
	8.0% Second Lien Senior Secured Notes due		100,000		84,674			58,943		—			—		—
	2018 (4)
	8.875% Senior Notes due 2019		275,000		275,000			140,250		275,000			275,000		136,125
	Total debt	$	605,741	$	585,591		$	351,836	$	573,891		$	568,625	$	348,051
	-1	The carrying amount for the Second Amended and Restated Credit Agreement represents fair value as the variable interest rates are reflective of current market conditions. The fair value of the notes was obtained by direct market quotes within Level 1 of the fair value hierarchy.
	-2	The debt discount was amortized using the effective interest rate method based upon an original five year term through October 1, 2014. The debt discount was fully amortized as of December 31, 2014.
	-3	The debt discount is being amortized using the effective interest rate method based upon a four year term through October 1, 2017, the first repurchase date applicable to the 2032 Notes. The debt discount was $4.8 million and $5.3 million as of March 31, 2015 and December 31, 2014, respectively.
	-4	The debt discount is being amortized using the effective interest rate method based upon a two and a half year term through September 1, 2017, the first repurchase date applicable to the Second Lien Notes. The debt discount as of March 31, 2015 was $15.3 million.
	The following table summarizes the total interest expense (contractual interest expense, accretion, amortization of debt discount and financing costs) and the effective interest rate on the liability component of the debt (amounts in thousands, except effective interest rates):
		Three Months					Three Months
		Ended					Ended
		31-Mar-15					31-Mar-14
				Effective					Effective
		Interest		Interest			Interest		Interest
		Expense		Rate			Expense		Rate
	Senior Credit Facility	$	1,537		3.9	%	$	585	NM
	3.25% Convertible Senior Notes due 2026		3		3.3	%		4		3.3	%
	5.0% Convertible Senior Notes due 2029		84		5	%		1,424		11	%
	5.0% Convertible Senior Notes due 2032		3,573		8.6	%		3,538		8.4	%
	8.0% Second Lien Senior Secured Notes due 2018		555		15.6	%		—		—	%
	8.875% Senior Notes due 2019		6,327		9.2	%		6,327		9.2	%
	Total	$	12,079				$	11,878
	NM - Not meaningful.
	Senior Credit Facility
	Total lender commitments under the Second Amended and Restated Credit Agreement (including all amendments, the “Senior Credit Facility”) are $600 million subject to borrowing base limitation, which as of March 31, 2015 was $150 million. Pursuant to the terms of the Senior Credit Facility, borrowing base redeterminations occur on a semi-annual basis on April 1 and October 1. As of March 31, 2015, we had $52 million outstanding under the Senior Credit Facility and $6.4 million in cash.   In February 2015, we entered into the Thirteenth Amendment with an effective date of February 26, 2015. On the effective date, the Thirteenth Amendment reduced our borrowing base to $200 million and extended the maturity of the Senior Credit Facility to February 24, 2017.  In March 2015, we closed on $100 million of Second Lien Notes, which was used to pay down the amount drawn on our Senior Credit Facility.  Our borrowing base was further reduced to $150 million upon the funding of the Second Lien Notes. The next borrowing base redetermination will occur on October 1, 2015.  Interest on revolving borrowings under the Senior Credit Facility, as amended, accrues at a rate calculated, at our option, at the bank base rate plus 1.25% to 2.25% or LIBOR plus 2.25% to 3.25%, depending on borrowing base utilization. Substantially all our assets are pledged as collateral to secure the Senior Credit Facility.
	The terms of the Senior Credit Facility as amended by the Thirteenth Amendment, require us to maintain certain covenants. Capitalized terms used here, but not defined, have the meanings assigned to them in the Senior Credit Facility. The primary financial covenants include:
	·	Current Ratio of 1.0/1.0;
	·	Interest Coverage Ratio of EBITDAX of not less than 2.0/1.0 for the trailing four quarters EBITDAX. The interest for such period to apply solely to the cash portion of interest expense; and
	·	Maximum Secured Debt no greater than 2.5 times EBITDAX for the trailing four quarters.
	As used in connection with the Senior Credit Facility, Current Ratio is consolidated current assets (including current availability under the Senior Credit Facility, but excluding non-cash assets related to our derivatives) to consolidated current liabilities (excluding non-cash liabilities related to our derivatives, accrued capital expenditures and current maturities under the Senior Credit Facility).
	As used in connection with the Senior Credit Facility, EBITDAX is earnings before interest expense, income tax, depreciation, depletion and amortization, exploration expense, stock based compensation and impairment of oil and natural gas properties. In calculating EBITDAX for this purpose, gains/losses on derivatives not designated as hedges, less net cash received (paid) in settlement of commodity derivatives are excluded from Adjusted EBITDAX.
	We were in compliance with all the financial covenants of the Senior Credit Facility as of March 31, 2015.
	.
	8% Second Lien Senior Secured Notes due 2018
	On March 12, 2015, we issued and sold $100 million of our Second Lien Notes.  We sold 100,000 Second Lien Note units (the “Units”), each consisting of a $1,000 principal amount at maturity and one warrant to purchase 48.84 shares of our $0.20 par value common stock. The Second Lien Notes are guaranteed by our subsidiary that also guarantees our Senior Credit Facility. The Company received proceeds, before offering expenses payable by the Company, of $100 million from the sale of the Units. The proceeds from the issuance of the Second Lien Notes were used to repay borrowings under the Senior Credit Facility and for general corporate purposes. The Second Lien Notes are secured on a senior second-priority basis by liens on certain assets of the Company and its subsidiary that secure our Senior Credit Facility, which liens are subject to an inter-creditor agreement in favor of the lenders under the Senior Credit Facility. The Second Lien Notes mature on March 15, 2018. If the aggregate principal amount outstanding on the 2032 Notes on August 1, 2017 is more than $25.0 million then the outstanding amount of the Second Lien Notes shall be due on September 1, 2017.  Interest on the Second Lien Notes is payable semi-annually in arrears on March 15 and September 15 of each year, beginning on September 15, 2015.
	We may redeem all or a portion of the Second Lien Notes at redemption prices (expressed as percentages of principal amount) equal to (i) 106% for the twelve-month period beginning on March 15, 2016 and (ii) 100% on or after March 15, 2017, in each case plus accrued and unpaid interest to the redemption date.  Prior to March 15, 2016, we may redeem, the Second Lien Notes at a customary “make-whole” premium. In addition, prior to September 12, 2015,  we may redeem up to 35% of the aggregate principal amount of the Second Lien Notes with the net cash proceeds of one or more equity offerings at a redemption price of 108% of the principal amount plus accrued and unpaid interest, if any, up to the redemption date.
	The indenture governing the Second Lien Notes restricts our ability and the ability of certain of our subsidiaries to: (i) incur additional debt; (ii) make certain dividends or pay dividends or distributions on our capital stock or purchase, redeem or retire such capital stock or our unsecured debt; (iii) sell assets, including the capital stock of our restricted subsidiaries; (iv) pay dividends or other payments of our restricted subsidiaries; (v) create liens that secure debt; (vi) enter into transactions with affiliates and (vii) merge or consolidate with another company. These covenants are subject to a number of important exceptions and qualifications.  At any time when the Second Lien Notes are rated investment grade by both Moody’s Investors Service, Inc. and Standard & Poor’s Ratings Services and no Default (as defined in the indenture governing the Second Lien Notes) has occurred and is continuing, many of these covenants will terminate.
	The Second Lien Notes and the warrants will not be separately transferable until the earliest of (i) 365 days after the date on which the warrants are originally issued, (ii) the date on which a registration statement related to the resale of the warrants is declared effective, (iii) the date on which a registration statement with respect to a registered exchange offer for the Second Lien Notes is declared effective and (iv) in the event of the occurrence of a change of control (as defined in the indenture), the date on which requisite notice of such change of control is mailed to the holders of Second Lien Notes. At such time, the warrants will become exercisable upon payment of the exercise price of $4.664 or convertible on a cashless basis as set forth in the agreement governing the warrants. Any warrants not exercised in ten years will expire.
	In connection with the Second Lien Notes, we entered into a registration rights agreement that provides holders of the Second Lien Notes certain rights relating to registration of the Second Lien Notes under the Securities Act of 1933, as amended (the “Securities Act”).  Pursuant to the registration rights agreement, the Company is obligated to file an exchange offer registration statement with the Securities Exchange Commission (“SEC”) with respect to an offer to exchange the Second Lien Notes for substantially identical notes that are registered under the Securities Act. We will use our reasonable best efforts to consummate the exchange offer by March 12, 2016. Additionally, we agreed to commence the exchange offer promptly after the exchange offer registration statement is declared effective by the SEC and use our reasonable best efforts to complete the exchange offer not later than 60 days after such effective date. Under certain circumstances, in lieu of a registered exchange offer, we have agreed to file a shelf registration statement with respect to the Second Lien Notes. If the exchange offer is not completed on or before March 12, 2016, or the shelf registration statement, if required, is not declared effective within the time periods specified in the Registration Rights Agreement, we have agreed to pay additional interest with respect to the Second Lien Notes in an amount of 0.25% of the principal amount of the Second Lien Notes per year for the first 90 days following such failure, increasing by 0.25% for each additional 90 days and not to exceed 1.00% of the principal amount per year, until the exchange offer is completed or the shelf registration statement is declared effective.
	We separately account for the liability and equity components of our Second Lien Notes in a manner that reflects our nonconvertible debt borrowing rate when interest is recognized in subsequent periods. We measured the debt component of the Second Lien Notes using a discount rate of 32% on the date of issuance. We attributed $84.6 million of the Second Lien Notes relative fair value to the debt component, which compared to the face value results in a debt discount of $15.4 million. Additionally, we recorded $15.4 million within additional paid-in capital representing the equity component of the Second Lien Notes. The debt discount will be amortized using the effective interest rate method through September 1, 2017 along with the applicable debt issuance costs.
	8.875% Senior Notes due 2019
	On March 2, 2011, we sold $275 million of our 2019 Notes. The 2019 Notes mature on March 15, 2019, unless earlier redeemed or repurchased. The 2019 Notes are our senior unsecured obligations and rank equally in right of payment to all of our other existing and future indebtedness. The 2019 Notes accrue interest at a rate of 8.875% annually, and interest is paid semi-annually in arrears on March 15 and September 15. The 2019 Notes are guaranteed by our subsidiary that also guarantees our Senior Credit Facility.
	We may redeem all or a portion of the 2019 Notes at redemption prices (expressed as percentages of principal amount) equal to (i) 104.438% for the twelve-month period beginning on March 15, 2015; (ii) 102.219% for the twelve-month period beginning on March 15, 2016 and (iii) 100.000% on or after March 15, 2017, in each case plus accrued and unpaid interest to the redemption date.
	The indenture governing the 2019 Notes restricts our ability and the ability of certain of our subsidiaries to: (i) incur additional debt; (ii) make certain dividends or pay dividends or distributions on our capital stock or purchase, redeem or retire such capital stock; (iii) sell assets, including the capital stock of our restricted subsidiaries; (iv) pay dividends or other payments of our restricted subsidiaries; (v) create liens that secure debt; (vi) enter into transactions with affiliates and (vii) merge or consolidate with another company. These covenants are subject to a number of important exceptions and qualifications. At any time when the 2019 Notes are rated investment grade by both Moody’s Investors Service, Inc. and Standard & Poor’s Ratings Services and no Default (as defined in the indenture governing the 2019 Notes) has occurred and is continuing, many of these covenants will terminate.
	5% Convertible Senior Notes due 2029
	In September 2009, we sold $218.5 million of our 2029 Notes. The 2029 Notes mature on October 1, 2029, unless earlier converted, redeemed or repurchased. We exchanged $166.7 million of the 2029 Notes for 2032 Notes in 2013.  On October 1, 2014, we repurchased $45.1 million of the 2029 Notes using restricted cash held in escrow for that purpose.  The 2029 Notes are convertible into shares of our common stock at a rate equal to 28.8534 shares per $1,000 principal amount of 2029 Notes (equal to an initial conversion price of approximately $34.66 per share of common stock).  As of March 31, 2015, $6.7 million in aggregate principal amount of the 2029 Notes remain outstanding.
	The 2029 Notes are our senior unsecured obligations and rank equally in right of payment to all of our other existing and future indebtedness. The 2029 Notes accrue interest at a rate of 5% annually, and interest is paid semi-annually in arrears on April 1 and October 1 of each year.
	Investors may convert their 2029 Notes at their option at any time prior to the close of business on the second business day immediately preceding the maturity date under the following circumstances: (1) during any fiscal quarter (and only during such fiscal quarter), if the last reported sale price of our common stock is greater than or equal to 135% of the conversion price of the 2029 Notes for at least 20 trading days in the period of 30 consecutive trading days ending on the last trading day of the preceding fiscal quarter; (2) if the 2029 Notes have been called for redemption or (3) upon the occurrence of one of specified corporate transactions. Investors may also convert their 2029 Notes at their option at any time beginning on September 1, 2029, and ending at the close of business on the second business day immediately preceding the maturity date.
	We separately accounted for the liability and equity components of our 2029 Notes in a manner that reflected our nonconvertible debt borrowing rate when interest was recognized through September 30, 2014. The debt discount was amortized using the effective interest rate method based upon an original five year term through October 1, 2014. The debt discount on the 2029 Notes was fully amortized as of December 31, 2014.
	5% Convertible Senior Notes due 2032
	As described above, we entered into separate, privately negotiated exchange agreements in which we retired $166.7 million in aggregate principal amount of our outstanding 2029 Notes in exchange for the issuance of the 2032 Notes in an aggregate principal amount of $166.3 million. The 2032 Notes will mature on October 1, 2032.
	Many terms of the 2032 Notes remain the same as the 2029 Notes they replaced, including the 5.0% annual cash interest rate and the conversion rate of 28.8534 shares of our common stock per $1,000 principal amount of 2032 Notes (equivalent to an initial conversion price of approximately $34.6580 per share of common stock), subject to adjustment in certain circumstances.
	Unlike the 2029 Notes, the principal amount of the 2032 Notes accretes at a rate of 2% per year commencing August 26, 2013, compounding on a semi-annual basis, until October 1, 2017. The accreted portion of the principal is payable in cash upon maturity but does not bear cash interest and is not convertible into our common stock. Holders have the option to require us to purchase any outstanding 2032 Notes on each of October 1, 2017, 2022 and 2027, at a price equal to 100% of the principal amount plus the accretion thereon. Accretion of principal is and will be reflected as a non-cash component of interest expense on our consolidated statement of operations during the term of the 2032 Notes. We recorded $0.8 million of accretion in the three months ended March 31, 2015.
	We have the right to redeem the 2032 Notes on or after October 1, 2016 at a price equal to 100% of the principal amount, plus accrued but unpaid interest and accretion thereon. The 2032 Notes also provide us with the option, at our election, to convert the new notes in whole or in part, prior to maturity, into the underlying common stock, provided the trading price of our common stock exceeds $45.06 (or 130% of the then applicable conversion price) for the required measurement period. If we elect to convert the 2032 Notes on or before October 1, 2016, holders will receive a make-whole premium.
	We separately account for the liability and equity components of our 2032 Notes in a manner that reflects our nonconvertible debt borrowing rate when interest is recognized in subsequent periods. We measured the debt component of the 2032 Notes using an effective interest rate of 8%. We attributed $158.8 million of the fair value to the 2032 Note to debt component which compared to the face results in a debt discount of $7.5 million which will be amortized through the first put date of October 1, 2017. Additionally, we recorded $24.4 million within additional paid-in capital representing the equity component of the 2032 Notes. A debt discount of $4.8 million remains to be amortized on the 2032 Notes as of March 31, 2015.
3.25% Convertible Senior Notes Due 2026
At March 31, 2015, $0.4 million of the 2026 Notes remained outstanding. Holders may present to us for redemption the remaining outstanding 2026 Notes on December 1, 2016 and December 1, 2021.
Upon conversion, we have the option to deliver shares at the applicable conversion rate, redeem in cash or in certain circumstances redeem in a combination of cash and shares.
The 2026 Notes are convertible into shares of our common stock at a rate equal to the sum of:
a)	15.1653 shares per $1,000 principal amount of 2026 Notes (equal to a “base conversion price” of approximately $65.94 per share) plus
b)	an additional amount of shares per $1,000 of principal amount of 2026 Notes equal to the incremental share factor 2.6762), multiplied by a fraction, the numerator of which is the applicable stock price less the “base conversion price” and the denominator of which is the applicable stock price.

Net_Loss_Per_Common_Share

Net Loss Per Common Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Net Loss Per Common Share	NOTE 4—Net Loss Per Common Share
	Net loss applicable to common stock was used as the numerator in computing basic and diluted loss per common share for the three ended March 31, 2015 and 2014. The following table sets forth information related to the computations of basic and diluted loss per share:
		Three Months Ended
		March 31,
		2015			2014
		(Amounts in thousands, except per share data)
	Basic and Diluted loss per share:
	Net loss applicable to common stock	$	(28,549	)	$	(29,923	)
	Weighted average shares of common stock outstanding		49,110			44,273
	Basic and Diluted loss per share (1) (2) (3)	$	(0.58	)	$	(0.68	)
	(1) Common shares issuable upon assumed conversion of		3,588			3,588
	convertible preferred stock or dividends paid were not
	presented as they would have been anti-dilutive.
	(2) Common shares issuable upon assumed conversion of		4,997			6,298
	the 2026 Notes, 2029 Notes and 2032 Notes or interest
	paid were not presented as they would have been
	anti-dilutive.
	(3) Common shares issuable on assumed conversion of		7,349			2,434
	restricted stock, stock warrant and employee stock
	option were not included in the computation of
	diluted loss per common share since their inclusion
	would have been anti-dilutive.

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 5—Income Taxes
	We recorded no income tax expense or benefit for the three months ended March 31, 2015. We increased our valuation allowance and reduced our net deferred tax assets to zero during 2009 after considering all available positive and negative evidence related to the realization of our deferred tax assets. Our assessment of the realization of our deferred tax assets has not changed, and as a result we continue to maintain a full valuation allowance for our net deferred assets as of March 31, 2015.
	As of March 31, 2015, we have no unrecognized tax benefits. There were no significant changes to the calculation since December 31, 2014.

Derivative_Activities

Derivative Activities	3 Months Ended
	Mar. 31, 2015
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Activities	NOTE 6—Derivative Activities
	We use commodity and financial derivative contracts to manage fluctuations in commodity prices and interest rates. We are currently not designating our derivative contracts for hedge accounting. All derivative gains and losses from our derivative contracts have been recognized in “Other income (expense)” on our Consolidated Statements of Operations.
	The following table summarizes gains and losses we recognized on our oil and natural gas derivatives for the three month periods ended March 31, 2015 and 2014.
			Three Months Ended
			March 31,
	Oil and Natural Gas Derivatives (in thousands)		2015			2014
	Gain (loss) on derivatives not designated as hedges		$	4,430		$	(8,501	)
	Commodity Derivative Activity
	We enter into swap contracts, costless collars or other derivative agreements from time to time to manage commodity price risk for a portion of our production. Our policy is that all hedges are approved by the Hedging Committee of our Board of Directors, and reviewed periodically by the Board of Directors. As of March 31, 2015, the commodity derivatives we used were in the form of:
	(a)	swaps, where we receive a fixed price and pay a floating price, based on NYMEX for natural gas, Louisiana Light Sweet Crude (Argus) for crude oil or specific transfer point quoted prices, and
	(b)	calls, where we grant the counter party the option to buy an underlying commodity at a specified strike price, within a certain period.
	Despite the measures taken by us to attempt to control price risk, we remain subject to price fluctuations for natural gas and crude oil sold in the spot market. Prices received for natural gas sold on the spot market are volatile due primarily to seasonality of demand and other factors beyond our control. Decreases in domestic crude oil and natural gas spot prices could have a material adverse effect on our financial position, results of operations and quantities of reserves recoverable on an economic basis. We routinely exercise our contractual right to net realized gains against realized losses when settling with our financial counterparties. Neither our counterparties nor we require any collateral upon entering derivative contracts. We had exposure of $38.5 million in derivative fair value had our counterparties as a group been unable to fulfill their obligations as of March 31, 2015.
	As of March 31, 2015, our open positions on our outstanding commodity derivative contracts, all of which were with Royal Bank of Canada, Bank of Montreal, JPMorgan Chase Bank, N.A., Merrill Lynch Commodities, Inc. and Wells Fargo Bank, N.A., were as follows:
	Contract Type	Daily			Remaining				Fixed Price		Fair Value at
		Volume			Volumes						31-Mar-15
											(in thousands)
	Natural gas calls (MMBtu)
	2015		20,000			5,500,000			$5.05-5.06		$	(152	)
	2016		20,000			7,320,000			$5.05-5.06		$	(139	)
	Oil swaps (BBL)
	2015 (LLS Argus)		3,500			962,500			$94.55-98.10		$	38,504
									Total		$	38,213
	The following table summarizes the fair values of our derivative financial instruments that are recorded at fair value classified in each level as of March 31, 2015 (in thousands). We measure the fair value of our commodity derivative contracts by applying the income approach. See Note 1 “Description of Business and Significant Accounting Policies-Fair Value Measurement” for our discussion for inputs used and valuation techniques for determining fair values.
		March 31, 2015 Fair Value Measurements Using
	Description	Level 1			Level 2				Level 3				Total
	Current Assets Commodity Derivatives	$	—		$	38,504			$	—			$	38,504
	Non-current Assets Commodity Derivatives		—			—				—				—
	Current Liabilities Commodity Derivatives		—			(152	)			—				(152	)
	Non-current Liabilities Commodity Derivatives		—			(139	)			—				(139	)
	Total	$	—		$	38,213			$	—			$	38,213
	We enter into oil and natural gas derivative contracts under which we have netting arrangements with each counter party. The following table discloses and reconciles the gross amounts to the amounts as presented on the Statement of Financial Position for the periods ending March 31, 2015 and December 31, 2014.
		31-Mar-15											31-Dec-14
	Fair Value of Oil and Gas Derivatives (in thousands)	Gross			Amount				As				Gross			Amount		As
		Amount			Offset				Presented				Amount			Offset		Presented
	Derivative Current Asset	$	38,504		$	—			$	38,504			$	47,444		$	—	$	47,444
	Derivative Non-current Asset		—			—				—				—			—		—
	Derivative Current Liability		(152	)		—				(152	)			(102	)		—		(102	)
	Derivative Non-current Liability		(139	)		—				(139	)			(464	)		—		(464	)
	Total	$	38,213		$	—			$	38,213			$	46,878		$	—	$	46,878

Stockholders_Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Stockholders' Equity	NOTE 7—Stockholders’ Equity
	Common Stock Offering
	On March 10, 2015, we closed an underwritten public offering of 12 million shares of our common stock at $ 4.15 per share.  Proceeds after offering expenses totaled approximately $48.0 million. The proceeds were used to repay borrowings under our Senior Credit Facility and for general corporate purposes.
	Warrants
	In connection with the issuance of the Second Lien Notes, we issued a detachable warrant for each $1,000 note. The holder of a warrant has the right to purchase 48.84 shares of our common stock par value $0.20 per share. The warrants were issued pursuant to a Warrant Agreement dated March 12, 2015 (the “Warrant Agreement”), between us and American Stock Transfer & Trust Company LLC. Under the terms of the Warrant Agreement, the Second Lien Notes and the warrants will not be separately transferable until the earliest of (i) 365 days after the date on which the warrants are originally issued, (ii) the date on which a registration statement related to the resale of the warrants is declared effective, (iii) the date on which a registration statement with respect to a registered exchange offer for the Second Lien Notes is declared effective and (iv) in the event of the occurrence of a change of control (as defined in the governing indenture), the date on which requisite notice of such change of control is mailed to the holders of Second Lien Notes. At such time, the warrants will become exercisable upon payment of the exercise price of $4.664 or convertible on a cashless basis as set forth in the Warrant Agreement. Any warrants not exercised in ten years will expire. Also on March 12, 2015, we entered into a Registration Rights Agreement with the Purchaser that provides holders of the warrants certain rights to registration under the Securities Act relating to the Warrants. Pursuant to the Warrant Registration Rights Agreement, we are obligated to file a shelf registration statement with the Securities and Exchange Commission within 90 days of March 12, 2015, relating to re-sales of the Warrants.  We will use our reasonable best efforts to cause the registration statement to be declared effective by the SEC by March 12, 2016.
	We valued the warrants as a separate financial instrument using the Black-Scholes method and recorded the $15.4 million relative fair value to Additional paid in capital on the Consolidated Balance Sheets.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2015
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 8—Commitments and Contingencies
	As of March 31, 2015, we did not have any changes in material commitments and contingencies, including outstanding and pending litigation.

Description_of_Business_and_Si1

Description of Business and Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2015

Accounting Policies [Abstract]

Liquidity and Capital Resources

Liquidity and Capital Resources—We are an exploration and production Company with interests in non-conventional oil shale properties that require large investments of capital to develop.  Our immediate capital resources to develop our properties come from cash on hand, operating cash flows and borrowings on our Senior Credit Facility. The current significant decline in crude oil prices and to a lesser extent the continued depressed natural gas prices has negatively impacted our cash flows that enable us to invest in and maintain our properties and service our long term obligations.

We have taken the following steps in the three months ended March 31, 2015 to mitigate the effects of the abnormally low crude oil prices on our operations:

1. We have significantly reduced our capital expenditures planned for 2015 thereby conserving capital.

2. We have extended the maturity of our Senior Credit Facility to February 24, 2017.

3. We have received proceeds from our issuance of $100 million Second Lien Notes.

4. We have received proceeds of $48 million from the sale of 12,000,000 shares of our common stock to the public.

5. We have reduced our staff headcount by 18% from year-end 2014 levels thereby reducing expenses.

Additionally, we have approximately 70% of our remaining projected 2015 oil production favorably hedged.

We have other resource options to enhance liquidity as well, such as selling non-core properties, entering into joint venture in our core areas and/or further reducing our planned capital expenditures.

As a result of the steps we have taken to enhance our liquidity, we anticipate cash from operations, cash on hand and available borrowing capacity will be sufficient to meet our investing, financing, and working capital requirements through the end of 2015, however the effects of an extended period of low commodity prices will require us to take further cost cutting measures.

Principles of Consolidation

Principles of Consolidation— The consolidated financial statements of the Company included in this Quarterly Report on Form 10-Q have been prepared, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) and accordingly, certain information normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (“US GAAP”) has been condensed or omitted. The consolidated financial statements include the financial statements of the Company and its wholly-owned subsidiary. Intercompany balances and transactions have been eliminated in consolidation. The consolidated financial statements reflect all normal recurring adjustments that, in the opinion of management, are necessary for a fair presentation. Certain data in prior periods’ financial statements have been adjusted to conform to the presentation of the current period. We have evaluated subsequent events through the date of this filing.

Use of Estimates

Use of Estimates—Our management has made a number of estimates and assumptions relating to the reporting of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities to prepare these consolidated financial statements in conformity with US GAAP.

Cash and Cash Equivalents

Cash and Cash Equivalents—Cash and cash equivalents includes cash on hand, demand deposit accounts and temporary cash investments with maturities of ninety days or less at the date of purchase.

Property and Equipment

Property and Equipment—As of March 31, 2015, we had interests in oil and natural gas properties totaling $639.3 million, net of accumulated depletion, which we account for under the successful efforts method. Under this method, costs of acquiring unproved and proved oil and natural gas leasehold acreage are capitalized. When proved reserves are found on an unproved property, the associated leasehold cost is transferred to proved properties. Significant unproved leases are reviewed periodically, and a valuation allowance is provided for any estimated decline in value. Costs of all other unproved leases are amortized over the estimated average holding period of the leases. Development costs are capitalized, including the costs of unsuccessful development wells.

Impairment

Impairment—We periodically assess our long-lived assets recorded in oil and natural gas properties on the Consolidated Balance Sheets to ensure that they are not carried in excess of fair value, which is computed using level 3 inputs such as discounted cash flow models or valuations, based on estimated future commodity prices and our various operational assumptions. An evaluation is performed on a field-by-field basis at least annually or whenever changes in facts and circumstances indicate that our oil and natural gas properties may be impaired.

Fair Value Measurement

Fair Value Measurement—Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value of an asset should reflect its highest and best use by market participants, whether in-use or an in-exchange valuation premise. The fair value of a liability should reflect the risk of nonperformance, which includes, among other things, our credit risk.

We use various methods, including the income approach and market approach, to determine the fair values of our financial instruments that are measured at fair value on a recurring basis, which depend on a number of factors, including the availability of observable market data over the contractual term of the underlying instrument. For some of our instruments, the fair value is calculated based on directly observable market data or data available for similar instruments in similar markets. For other instruments, the fair value may be calculated based on these inputs as well as other assumptions related to estimates of future settlements of these instruments. We separate our financial instruments into three levels (levels 1, 2 and 3) based on our assessment of the availability of observable market data and the significance of non-observable data used to determine the fair value of our instruments. Our assessment of an instrument can change over time based on the maturity or liquidity of the instrument, which could result in a change in the classification of the instruments between levels.

Each of these levels and our corresponding instruments classified by level are further described below:

●

Level 1 Inputs— unadjusted quoted market prices in active markets for identical assets or liabilities. Included in this level are our senior notes;

●

Level 2 Inputs— quotes which are derived principally from or corroborated by observable market data. Included in this level are our bank debt and commodity derivatives whose fair values are based on third-party quotes or available interest rate information and commodity pricing data obtained from third party pricing sources and our creditworthiness or that of our counterparties; and

●

Level 3 Inputs— unobservable inputs for the asset or liability, such as discounted cash flow models or valuations, based on our various assumptions and future commodity prices. Included in this level would be acquisitions and impairments of oil and natural gas properties.

As of March 31, 2015 and December 31, 2014, the carrying amounts of our cash and cash equivalents, trade receivables and payables represented fair value because of the short-term nature of these instruments.

The following table summarizes the fair value of our financial instruments and long lived assets that are recorded or disclosed at fair value classified in each level as of March 31, 2015:

Fair Value Measurements as of March 31, 2015

(in thousands)

Description

Level 1

Level 2

Level 3

Total

Recurring Fair Value Measurements

Commodity Derivatives (see Note 6)

$

—

$

38,213

$

—

$

38,213

Debt (see Note 3)

(240,893

)

(52,000

)

(58,943

)

(351,836

)

Total recurring fair value measurements

$

(240,893

)

$

(13,787

)

$

(58,943

)

$

(313,623

)

Depreciation

Depreciation—Depreciation and depletion of producing oil and natural gas properties is calculated using the units-of-production method. Proved developed reserves are used to compute unit rates for unamortized tangible and intangible development costs, and proved reserves are used for unamortized leasehold costs. Gains and losses on disposals or retirements that are significant or include an entire depreciable or depletable property unit are included in operating income. Depreciation of furniture, fixtures and equipment, consisting of office furniture, computer hardware and software and leasehold improvements, is computed using the straight-line method over their estimated useful lives, which vary from three to five years.

Transportation Obligation

Transportation Obligation—We entered into a natural gas gathering agreement with an independent service provider, effective July 27, 2010. The agreement is scheduled to remain in effect for a period of ten years and requires the service provider to construct pipelines and facilities to connect our wells to the service provider’s gathering system in our Eagle Ford Shale Trend area of South Texas. In compensation for the services, we agreed to pay the service provider 110% of the total capital cost incurred by the service provider to construct new pipelines and facilities. The service provider bills us for 20% of the accumulated unpaid capital costs annually. The transportation obligation liability was $5.4 million as of each of March 31, 2015 and December 31, 2014.

We accounted for the agreement by recording a long-term asset, included in “Deferred financing cost and other” on the Consolidated Balance Sheets. The asset is being amortized using the units-of-production method and the amortization expense is included in “Transportation and processing” on the Consolidated Statements of Operations. The related current and long-term liabilities are presented on the Consolidated Balance Sheets in “Accrued liabilities” and “Transportation obligation”, respectively.

Asset Retirement Obligations

Asset Retirement Obligations—Asset retirement obligations are related to the abandonment and site restoration requirements that result from the exploration and development of our oil and gas properties. We record the fair value of a liability for an asset retirement obligation in the period in which it is incurred and a corresponding increase in the carrying amount of the related long-lived asset. Accretion expense is included in “Depreciation, depletion and amortization” on our Consolidated Statements of Operations. See Note 2.

Revenue Recognition

Revenue Recognition—Oil and natural gas revenues are recognized when production is sold to a purchaser at a fixed or determinable price, when delivery has occurred and title has transferred, and if collectability of the revenue is probable. Revenues from the production of crude oil and natural gas properties in which we have an interest with other producers are recognized using the entitlements method. We record a liability or an asset for natural gas balancing when we have sold more or less than our working interest share of natural gas production, respectively. At March 31, 2015 and December 31, 2014, the net liability for natural gas balancing was immaterial. Differences between actual production and net working interest volumes are routinely adjusted.

Derivative Instruments

Derivative Instruments—We use derivative instruments such as futures, forwards, options, collars and swaps for purposes of hedging our exposure to fluctuations in the price of crude oil and natural gas and to hedge our exposure to changing interest rates. Accounting standards related to derivative instruments and hedging activities require that all derivative instruments subject to the requirements of those standards be measured at fair value and recognized as assets or liabilities in the balance sheet. We offset the fair value of our asset and liability positions with the same counterparty for each commodity type. Changes in fair value are required to be recognized in earnings unless specific hedge accounting criteria are met. All our realized gain or losses on our derivative contracts are the result of cash settlements. We have not designated any of our derivative contracts as hedges; accordingly, changes in fair value are reflected in earnings. See Note 6.

Income or Loss Per Share

Income or Loss Per Share—Basic income (loss) per common share is computed by dividing net income (loss) applicable to common stockholders for each reporting period by the weighted-average number of common shares outstanding during the period. Diluted income (loss) per common share is computed by dividing net income (loss) applicable to common stockholders for each reporting period by the weighted average number of common shares outstanding during the period, plus the effects of potentially dilutive stock options, stock warrants and restricted stock calculated using the Treasury Stock method and the potential dilutive effect of the conversion of shares associated with our 5.375% Series B Convertible Preferred Stock (“Series B Preferred Stock”), 3.25% Convertible Senior Notes due 2026 (the “2026 Notes”), 5% Convertible Senior Notes due 2029 (the “2029 Notes”) and 5% Convertible Senior Notes due 2032 (the “2032 Notes”). See Note 4.

Commitments and Contingencies

Commitments and Contingencies—Liabilities for loss contingencies, including environmental remediation costs, arising from claims, assessments, litigation, fines and penalties, and other sources are recorded when it is probable that a liability has been incurred and the amount of the assessment and/or remediation can be reasonably estimated. Recoveries from third parties, when probable of realization, are separately recorded and are not offset against the related environmental liability.

Guarantees

Guarantees—On March 2, 2011, we issued and sold $275 million aggregate principal amount of our 8.875% Senior Notes due 2019 (the “2019 Notes”). Upon issuance of the guarantee related to the 2019 Notes, our subsidiary also became a guarantor on our outstanding 2029 Notes and our 2026 Notes, pursuant to the respective indentures governing the 2029 Notes and 2026 Notes. On August 26, 2013 and October 1, 2013, we issued $109.25 million and $57.0 million, respectively, aggregate principal amount of our 2032 Notes, which are also guaranteed by our subsidiary pursuant to the terms of the indenture governing the 2032 Notes. The 2019 Notes, 2029 Notes, 2026 Notes and 2032 Notes are guaranteed on a senior unsecured basis by our 100% owned subsidiary, Goodrich Petroleum Company, L.L.C. On March 12, 2015 we issued and sold $100 million aggregate principal amount of our 8% Second Lien Senior Secured Notes due 2018 (the “Second Lien Notes”) and upon issuance our subsidiary became the guarantor of the Second Lien Notes under the governing indenture.

Goodrich Petroleum Corporation, as the parent company (the “Parent Company”), has no independent assets or operations. The guarantees are full and unconditional, subject to customary exceptions pursuant to the indentures governing our 2019 Notes, 2026 Notes, 2029 Notes and 2032 Notes, as discussed below. The Parent Company has no other subsidiaries. In addition, there are no restrictions on the ability of the Parent Company to obtain funds from its subsidiary by dividend or loan. Finally, the Parent Company’s wholly-owned subsidiary does not have restricted assets that exceed 25% of net assets as of the most recent fiscal year end that may not be transferred to the Parent Company in the form of loans, advances or cash dividends by the subsidiary without the consent of a third party.

Guarantees of the 2019 Notes will be released under certain circumstances, including in the event a Subsidiary Guarantor (as defined in the indenture governing the 2019 Notes) is sold or disposed of (whether by merger, consolidation, the sale of its capital stock or the sale of all or substantially all of its assets (other than by lease)) and whether or not the Subsidiary Guarantor is the surviving entity in such transaction to a person which is not the Parent Company or a Restricted Subsidiary of the Parent Company, such Subsidiary Guarantor will be released from its obligations under its Subsidiary Guarantee if the sale or other disposition does not violate the covenants described under “Limitation on Sales of Assets and Subsidiary Stock” in the indenture governing the 2019 Notes. In addition, a Subsidiary Guarantor will be released from its obligations under the indenture and its guarantee if such Subsidiary Guarantor ceases to guarantee any other indebtedness of the Parent Company or a Subsidiary Guarantor under a credit facility, and is not a borrower under the Senior Secured Credit Agreement, provided no Event of Default (as defined in the indenture governing the 2019 Notes) has occurred and is continuing; or if the Parent Company designates such subsidiary as an Unrestricted Subsidiary and such designation complies with the other applicable provisions of the indenture or if such subsidiary otherwise no longer meets the definition of a Restricted Subsidiary; or in connection with any covenant defeasance, legal defeasance or satisfaction and discharge of the 2019 Notes in accordance with the indenture.

Guarantees of the 2032 Notes, 2029 Notes and 2026 Notes will be released if the Subsidiary Guarantor no longer guarantees the 2019 Notes, if the Subsidiary Guarantor is dissolved or liquidated, if the Subsidiary Guarantor is no longer the Parent Company’s subsidiary or upon satisfaction and discharge of the 2032 Notes, 2029 Notes or 2026 Notes in accordance with their respective indentures.

Guarantees of the Second Lien Notes will be released under certain circumstances, including in the event a Subsidiary Guarantor is sold or disposed of (whether by merger, consolidation, the sale of its capital stock or the sale of all or substantially all of its assets (other than by lease)) and whether or not the Subsidiary Guarantor is the surviving entity in such transaction to a person which is not the Parent Company or a Restricted Subsidiary of the Parent Company, such Subsidiary Guarantor will be released from its obligations under its Subsidiary Guarantee if the sale or other disposition does not violate the covenants described under “Limitation on Sales of Assets and Subsidiary Stock” in the indenture governing the Second Lien Notes. In addition, a Subsidiary Guarantor will be released from its obligations under the indenture and its guarantee if such Subsidiary Guarantor ceases to guarantee any other indebtedness of the Parent Company or a Subsidiary Guarantor, provided no Event of Default (as defined in the indenture governing the Second Lien Notes) has occurred and is continuing; or if the Parent Company designates such subsidiary as an Unrestricted Subsidiary and such designation complies with the other applicable provisions of the indenture or if such subsidiary otherwise no longer meets the definition of a Restricted Subsidiary; or in connection with any covenant defeasance, legal defeasance or satisfaction and discharge of the Second Lien Notes in accordance with the indenture.

New Accounting Pronouncements

New Accounting Pronouncements

In April 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2015-03, Interest-Imputation of Interest, which seeks to simplify presentation of debt issuance costs. The ASU requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The recognition and measurement guidance for debt issuance costs are not affected by the amendments in this ASU. Entities should apply the amendments in this ASU on a retrospective basis, wherein the balance sheet of each individual period presented should be adjusted to reflect the period-specific effects of applying the new guidance. For public entities, this ASU is effective for annual reporting periods beginning after December 15, 2015, including interim periods within that reporting period. The Company is currently evaluating the provisions of this ASU and assessing the impact, it may have on our consolidated financial statements.

On January 9, 2015, the FASB issued ASU 2015-01, which eliminates the concept of “extraordinary” items from US GAAP.  The ASU is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. A reporting entity may apply the amendments prospectively. A reporting entity also may apply the amendments retrospectively to all prior periods presented in the financial statements. Early adoption is permitted, provided that the guidance is applied from the beginning of the fiscal year of adoption. The adoption of this guidance is not expected to have an impact on the Company’s consolidated financial statements.

On August 27, 2014, the FASB issued ASU 2014-15, which provides guidance on determining when and how to disclose going-concern uncertainties in the financial statements. The new standard requires management to perform interim and annual assessments of the Company’s ability to continue as a going concern within one year of the date the financial statements are issued. An entity must provide certain disclosures if conditions or events raise substantial doubt about the entity’s ability to continue as a going concern. The ASU applies to all entities and is effective for annual periods ending after December 15, 2016, and interim periods thereafter, with early adoption permitted.

In May 2014, the FASB issued ASU 2014-09 that introduces a new five-step revenue recognition model in which an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This ASU also requires disclosures sufficient to enable users to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers, including qualitative and quantitative disclosures about contracts with customers, significant judgments and changes in judgments, and assets recognized from the costs to obtain or fulfill a contract. This standard is effective for fiscal years beginning after December 15, 2016, including interim periods within that reporting period. The Company is currently evaluating the new guidance to determine the impact it will have on its consolidated financial statements.

Description_of_Business_and_Si2

Description of Business and Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Fair Value of Financial Instruments and Long Lived Assets	The following table summarizes the fair value of our financial instruments and long lived assets that are recorded or disclosed at fair value classified in each level as of March 31, 2015:
		Fair Value Measurements as of March 31, 2015
		(in thousands)
	Description	Level 1			Level 2			Level 3			Total
	Recurring Fair Value Measurements
	Commodity Derivatives (see Note 6)	$	—		$	38,213		$	—		$	38,213
	Debt (see Note 3)		(240,893	)		(52,000	)		(58,943	)		(351,836	)
	Total recurring fair value measurements	$	(240,893	)	$	(13,787	)	$	(58,943	)	$	(313,623	)

Asset_Retirement_Obligations_T

Asset Retirement Obligations (Tables)	3 Months Ended
	Mar. 31, 2015
Asset Retirement Obligation Disclosure [Abstract]
Reconciliation of Asset Retirement Obligations	The reconciliation of the beginning and ending asset retirement obligation for the period ending March 31, 2015 is as follows (in thousands):
		March 31,
		2015
	Beginning balance at December 31, 2014	$	6,510
	Liabilities incurred		11
	Revisions in estimated liabilities		—
	Liabilities settled		—
	Accretion expense		130
	Dispositions		—
	Ending balance	$	6,651
	Current liability	$	145
	Long term liability	$	6,506

Debt_Tables

Debt (Tables)	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Components of Debt	Debt consisted of the following balances as of the dates indicated (in thousands):
		31-Mar-15							31-Dec-14
		Principal		Carrying			Fair		Principal			Carrying		Fair
				Amount			Value (1)					Amount		Value (1)
	Senior Credit Facility	$	52,000	$	52,000		$	52,000	$	121,000		$	121,000	$	121,000
	3.25% Convertible Senior Notes due 2026		429		429			107		429			429		353
	5.0% Convertible Senior Notes due 2029 (2)		6,692		6,692			2,543		6,692			6,692		3,480
	5.0% Convertible Senior Notes due 2032 (3)		171,620		166,796			97,993		170,770			165,504		87,093
	8.0% Second Lien Senior Secured Notes due		100,000		84,674			58,943		—			—		—
	2018 (4)
	8.875% Senior Notes due 2019		275,000		275,000			140,250		275,000			275,000		136,125
	Total debt	$	605,741	$	585,591		$	351,836	$	573,891		$	568,625	$	348,051
	-1	The carrying amount for the Second Amended and Restated Credit Agreement represents fair value as the variable interest rates are reflective of current market conditions. The fair value of the notes was obtained by direct market quotes within Level 1 of the fair value hierarchy.
	-2	The debt discount was amortized using the effective interest rate method based upon an original five year term through October 1, 2014. The debt discount was fully amortized as of December 31, 2014.
	-3	The debt discount is being amortized using the effective interest rate method based upon a four year term through October 1, 2017, the first repurchase date applicable to the 2032 Notes. The debt discount was $4.8 million and $5.3 million as of March 31, 2015 and December 31, 2014, respectively.
	-4	The debt discount is being amortized using the effective interest rate method based upon a two and a half year term through September 1, 2017, the first repurchase date applicable to the Second Lien Notes. The debt discount as of March 31, 2015 was $15.3 million.
Summary of Total Interest Expense and Effective Interest Rate on Debt	The following table summarizes the total interest expense (contractual interest expense, accretion, amortization of debt discount and financing costs) and the effective interest rate on the liability component of the debt (amounts in thousands, except effective interest rates):
		Three Months					Three Months
		Ended					Ended
		31-Mar-15					31-Mar-14
				Effective					Effective
		Interest		Interest			Interest		Interest
		Expense		Rate			Expense		Rate
	Senior Credit Facility	$	1,537		3.9	%	$	585	NM
	3.25% Convertible Senior Notes due 2026		3		3.3	%		4		3.3	%
	5.0% Convertible Senior Notes due 2029		84		5	%		1,424		11	%
	5.0% Convertible Senior Notes due 2032		3,573		8.6	%		3,538		8.4	%
	8.0% Second Lien Senior Secured Notes due 2018		555		15.6	%		—		—	%
	8.875% Senior Notes due 2019		6,327		9.2	%		6,327		9.2	%
	Total	$	12,079				$	11,878
	NM - Not meaningful.

Net_Loss_Per_Common_Share_Tabl

Net Loss Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Computation of Net Income (Loss) Per Common Share	The following table sets forth information related to the computations of basic and diluted loss per share:
		Three Months Ended
		March 31,
		2015			2014
		(Amounts in thousands, except per share data)
	Basic and Diluted loss per share:
	Net loss applicable to common stock	$	(28,549	)	$	(29,923	)
	Weighted average shares of common stock outstanding		49,110			44,273
	Basic and Diluted loss per share (1) (2) (3)	$	(0.58	)	$	(0.68	)
	(1) Common shares issuable upon assumed conversion of		3,588			3,588
	convertible preferred stock or dividends paid were not
	presented as they would have been anti-dilutive.
	(2) Common shares issuable upon assumed conversion of		4,997			6,298
	the 2026 Notes, 2029 Notes and 2032 Notes or interest
	paid were not presented as they would have been
	anti-dilutive.
	(3) Common shares issuable on assumed conversion of		7,349			2,434
	restricted stock, stock warrant and employee stock
	option were not included in the computation of
	diluted loss per common share since their inclusion
	would have been anti-dilutive.

Derivative_Activities_Tables

Derivative Activities (Tables)	3 Months Ended
	Mar. 31, 2015
Summary of Gains and Losses on Derivatives	The following table summarizes gains and losses we recognized on our oil and natural gas derivatives for the three month periods ended March 31, 2015 and 2014.
			Three Months Ended
			March 31,
	Oil and Natural Gas Derivatives (in thousands)		2015			2014
	Gain (loss) on derivatives not designated as hedges		$	4,430		$	(8,501	)
Outstanding Commodity Derivative Contracts	As of March 31, 2015, our open positions on our outstanding commodity derivative contracts, all of which were with Royal Bank of Canada, Bank of Montreal, JPMorgan Chase Bank, N.A., Merrill Lynch Commodities, Inc. and Wells Fargo Bank, N.A., were as follows:
	Contract Type	Daily			Remaining				Fixed Price		Fair Value at
		Volume			Volumes						31-Mar-15
											(in thousands)
	Natural gas calls (MMBtu)
	2015		20,000			5,500,000			$5.05-5.06		$	(152	)
	2016		20,000			7,320,000			$5.05-5.06		$	(139	)
	Oil swaps (BBL)
	2015 (LLS Argus)		3,500			962,500			$94.55-98.10		$	38,504
									Total		$	38,213
Derivative Assets and Liabilities Recorded at Fair Value	The following table summarizes the fair values of our derivative financial instruments that are recorded at fair value classified in each level as of March 31, 2015 (in thousands). We measure the fair value of our commodity derivative contracts by applying the income approach. See Note 1 “Description of Business and Significant Accounting Policies-Fair Value Measurement” for our discussion for inputs used and valuation techniques for determining fair values.
		March 31, 2015 Fair Value Measurements Using
	Description	Level 1			Level 2				Level 3				Total
	Current Assets Commodity Derivatives	$	—		$	38,504			$	—			$	38,504
	Non-current Assets Commodity Derivatives		—			—				—				—
	Current Liabilities Commodity Derivatives		—			(152	)			—				(152	)
	Non-current Liabilities Commodity Derivatives		—			(139	)			—				(139	)
	Total	$	—		$	38,213			$	—			$	38,213
Derivative
Derivative Assets and Liabilities Recorded at Fair Value	The following table discloses and reconciles the gross amounts to the amounts as presented on the Statement of Financial Position for the periods ending March 31, 2015 and December 31, 2014.
		31-Mar-15											31-Dec-14
	Fair Value of Oil and Gas Derivatives (in thousands)	Gross			Amount				As				Gross			Amount		As
		Amount			Offset				Presented				Amount			Offset		Presented
	Derivative Current Asset	$	38,504		$	—			$	38,504			$	47,444		$	—	$	47,444
	Derivative Non-current Asset		—			—				—				—			—		—
	Derivative Current Liability		(152	)		—				(152	)			(102	)		—		(102	)
	Derivative Non-current Liability		(139	)		—				(139	)			(464	)		—		(464	)
	Total	$	38,213		$	—			$	38,213			$	46,878		$	—	$	46,878

Description_of_Business_and_Si3

Description of Business and Significant Accounting Policies - Additional Information (Detail) (USD $)

0 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

0 Months Ended

Mar. 10, 2015

Mar. 31, 2015

Dec. 31, 2014

Mar. 31, 2014

Oct. 01, 2013

Aug. 26, 2013

Mar. 02, 2011

Mar. 12, 2015

Feb. 26, 2015

Sep. 30, 2009

Dec. 31, 2013

Description Of Company And Significant Accounting Policies [Line Items]

Debt instrument, principal amount

$605,741,000

$573,891,000

Proceeds from public offering of common stock

48,000,000

Common stock issued in public offering

12,000,000

Percentage of Staff Headcount Reduced

18.00%

Percentage of oil production favorably hedged

70.00%

Interests in oil and gas properties, net of accumulated depletion

639,300,000

Natural gas gathering agreement period

10 years

Percentage paid to service provider

110.00%

Percentage of accumulated capital costs charged annually

20.00%

Transportation obligation liability

5,400,000

5,400,000

Preferred stock, dividend rate, percentage

5.38%

Maximum Wholly-owned subsidiary

Description Of Company And Significant Accounting Policies [Line Items]

Percentage of restricted assets that may not be transferred to the parent company

25.00%

Minimum

Description Of Company And Significant Accounting Policies [Line Items]

Furniture, fixtures and equipment estimated useful lives

3 years

Maximum

Description Of Company And Significant Accounting Policies [Line Items]

Furniture, fixtures and equipment estimated useful lives

5 years

Second Lien Senior Secured Notes

Description Of Company And Significant Accounting Policies [Line Items]

Debt instrument, principal amount

100,000,000

Senior Credit Facility

Description Of Company And Significant Accounting Policies [Line Items]

Maturity date of credit facility

24-Feb-17

Debt instrument, principal amount

52,000,000

121,000,000

3.25% Convertible Senior Notes due 2026

Description Of Company And Significant Accounting Policies [Line Items]

Debt instrument, principal amount

429,000

429,000

Debt instrument interest rate

3.25%

Debt instruments maturity date

2026

5.0% Convertible Senior Notes due 2029

Description Of Company And Significant Accounting Policies [Line Items]

Debt instrument, principal amount

6,692,000

[1]

6,692,000

[1]

218,500,000

Debt instrument interest rate

5.00%

Debt instruments maturity date

2029

5.0% Convertible Senior Notes due 2032

Description Of Company And Significant Accounting Policies [Line Items]

Debt instrument, principal amount

171,620,000

[2]

170,770,000

[2]

57,000,000

109,250,000

166,300,000

Debt instrument interest rate

5.00%

Debt instruments maturity date

2032

2032

2032

Percentage owned in subsidiary

100.00%

100.00%

8.875% Senior Notes due 2019

Description Of Company And Significant Accounting Policies [Line Items]

Debt instrument, principal amount

275,000,000

275,000,000

275,000,000

Debt instrument interest rate

8.88%

Debt instruments maturity date

2019

Percentage owned in subsidiary

100.00%

8% Second Lien Senior Secured Notes due 2018

Description Of Company And Significant Accounting Policies [Line Items]

Debt instrument, principal amount

$100,000,000

[3]

$100,000,000

Debt instrument interest rate

8.00%

Debt instruments maturity date

2018

Percentage owned in subsidiary

100.00%

[1]

The debt discount was amortized using the effective interest rate method based upon an original five year term through October 1, 2014. The debt discount was fully amortized as of December 31, 2014.

[2]

The debt discount is being amortized using the effective interest rate method based upon a four year term through October 1, 2017, the first repurchase date applicable to the 2032 Notes. The debt discount was $4.8 million and $5.3 million as of March 31, 2015 and December 31, 2014, respectively.

[3]

The debt discount is being amortized using the effective interest rate method based upon a two and a half year term through September 1, 2017, the first repurchase date applicable to the Second Lien Notes. The debt discount as of March 31, 2015 was $15.3 million.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments and Long Lived Assets (Detail) (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Thousands, unless otherwise specified
Recurring Fair Value Measurements
Commodity Derivatives	$38,213		$46,878
Debt	-351,836	[1]	-348,051	[1]
Recurring Fair Value Measurements
Recurring Fair Value Measurements
Commodity Derivatives	38,213
Debt	-351,836
Total recurring fair value measurements	-313,623
Level 1 | Recurring Fair Value Measurements
Recurring Fair Value Measurements
Debt	-240,893
Total recurring fair value measurements	-240,893
Level 2
Recurring Fair Value Measurements
Commodity Derivatives	38,213
Level 2 | Recurring Fair Value Measurements
Recurring Fair Value Measurements
Commodity Derivatives	38,213
Debt	-52,000
Total recurring fair value measurements	-13,787
Level 3 | Recurring Fair Value Measurements
Recurring Fair Value Measurements
Debt	-58,943
Total recurring fair value measurements	($58,943)
[1]	The carrying amount for the Second Amended and Restated Credit Agreement represents fair value as the variable interest rates are reflective of current market conditions. The fair value of the notes was obtained by direct market quotes within Level 1 of the fair value hierarchy.

Reconciliation_of_Asset_Retire

Reconciliation of Asset Retirement Obligations (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Asset Retirement Obligation Disclosure [Abstract]
Beginning balance	$6,510
Liabilities incurred	11
Accretion expense	130
Ending balance	6,651
Current liability	145	145
Long term liability	$6,506	$6,365

Components_of_Debt_Detail

Components of Debt (Detail) (USD $)	Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2009	Dec. 31, 2013	Oct. 01, 2013	Aug. 26, 2013	Mar. 12, 2015	Mar. 02, 2011
In Thousands, unless otherwise specified
Debt Instrument [Line Items]
Debt Instrument, Principal	$605,741		$573,891
Debt Instrument, Carrying Amount	585,591		568,625
Debt Instrument, Fair Value	351,836	[1]	348,051	[1]
Senior Credit Facility
Debt Instrument [Line Items]
Debt Instrument, Principal	52,000		121,000
Debt Instrument, Carrying Amount	52,000		121,000
Debt Instrument, Fair Value	52,000	[1]	121,000	[1]
3.25% Convertible Senior Notes due 2026
Debt Instrument [Line Items]
Debt Instrument, Principal	429		429
Debt Instrument, Carrying Amount	429		429
Debt Instrument, Fair Value	107	[1]	353	[1]
5.0% Convertible Senior Notes due 2029
Debt Instrument [Line Items]
Debt Instrument, Principal	6,692	[2]	6,692	[2]	218,500
Debt Instrument, Carrying Amount	6,692	[2]	6,692	[2]	6,700
Debt Instrument, Fair Value	2,543	[1],[2]	3,480	[1],[2]
5.0% Convertible Senior Notes due 2032
Debt Instrument [Line Items]
Debt Instrument, Principal	171,620	[3]	170,770	[3]		166,300	57,000	109,250
Debt Instrument, Carrying Amount	166,796	[3]	165,504	[3]
Debt Instrument, Fair Value	97,993	[1],[3]	87,093	[1],[3]
8% Second Lien Senior Secured Notes due 2018
Debt Instrument [Line Items]
Debt Instrument, Principal	100,000	[4]							100,000
Debt Instrument, Carrying Amount	84,674	[4]
Debt Instrument, Fair Value	58,943	[1],[4]
8.875% Senior Notes due 2019
Debt Instrument [Line Items]
Debt Instrument, Principal	275,000		275,000							275,000
Debt Instrument, Carrying Amount	275,000		275,000
Debt Instrument, Fair Value	$140,250	[1]	$136,125	[1]
[1]	The carrying amount for the Second Amended and Restated Credit Agreement represents fair value as the variable interest rates are reflective of current market conditions. The fair value of the notes was obtained by direct market quotes within Level 1 of the fair value hierarchy.
[2]	The debt discount was amortized using the effective interest rate method based upon an original five year term through October 1, 2014. The debt discount was fully amortized as of December 31, 2014.
[3]	The debt discount is being amortized using the effective interest rate method based upon a four year term through October 1, 2017, the first repurchase date applicable to the 2032 Notes. The debt discount was $4.8 million and $5.3 million as of March 31, 2015 and December 31, 2014, respectively.
[4]	The debt discount is being amortized using the effective interest rate method based upon a two and a half year term through September 1, 2017, the first repurchase date applicable to the Second Lien Notes. The debt discount as of March 31, 2015 was $15.3 million.

Components_of_Debt_Parenthetic

Components of Debt (Parenthetical) (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Mar. 12, 2015
5.0% Convertible Senior Notes due 2029
Debt Instrument [Line Items]
Period of amortization on debt instrument	5 years
Debt discount amortization end date	1-Oct-14
5.0% Convertible Senior Notes due 2032
Debt Instrument [Line Items]
Period of amortization on debt instrument	4 years
Debt discount amortization end date	1-Oct-17
Debt discount	4.8	$5.30	$7.50
8% Second Lien Senior Secured Notes due 2018
Debt Instrument [Line Items]
Period of amortization on debt instrument	2 years 6 months
Debt discount amortization end date	1-Sep-17
Debt discount	15.3			$15.40

Summary_of_Total_Interest_Expe

Summary of Total Interest Expense and Effective Interest Rate on Debt (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Debt Instrument [Line Items]
Interest Expense	$12,079	$11,878
Senior Credit Facility
Debt Instrument [Line Items]
Interest Expense	1,537	585
Effective Interest Rate	3.90%
3.25% Convertible Senior Notes due 2026
Debt Instrument [Line Items]
Interest Expense	3	4
Effective Interest Rate	3.30%	3.30%
5.0% Convertible Senior Notes due 2029
Debt Instrument [Line Items]
Interest Expense	84	1,424
Effective Interest Rate	5.00%	11.00%
5.0% Convertible Senior Notes due 2032
Debt Instrument [Line Items]
Interest Expense	3,573	3,538
Effective Interest Rate	8.60%	8.40%
8% Second Lien Senior Secured Notes due 2018
Debt Instrument [Line Items]
Interest Expense	555
Effective Interest Rate	15.60%
8.875% Senior Notes due 2019
Debt Instrument [Line Items]
Interest Expense	$6,327	$6,327
Effective Interest Rate	9.20%	9.20%

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)

3 Months Ended

0 Months Ended

12 Months Ended

Mar. 31, 2015

Feb. 26, 2015

Dec. 31, 2014

Mar. 31, 2014

Dec. 31, 2013

Aug. 26, 2013

Mar. 12, 2015

Mar. 02, 2011

Oct. 01, 2014

Sep. 30, 2009

Oct. 01, 2013

Debt [Line Items]

Cash and cash equivalents

$6,426,000

$8,000

$810,000

$49,220,000

Debt instrument, principal amount

605,741,000

573,891,000

Common stock, par value

$0.20

$0.20

Proceeds from Second Lien Notes

100,000,000

Debt Instrument, Carrying Amount

585,591,000

568,625,000

Accretion rate

2.00%

Base Rate | Minimum

Debt [Line Items]

Debt instrument rate minimum

1.25%

Base Rate | Maximum

Debt [Line Items]

Debt instrument rate minimum

2.25%

London Interbank Offered Rate (LIBOR) | Minimum

Debt [Line Items]

Debt instrument rate minimum

2.25%

London Interbank Offered Rate (LIBOR) | Maximum

Debt [Line Items]

Debt instrument rate minimum

3.25%

Senior Credit Facility

Debt [Line Items]

Total lender commitments under the Senior Credit Facility borrowing base

600,000,000

Senior credit facility, current borrowing capacity

150,000,000

Amount outstanding under the senior credit facility

52,000,000

Senior credit facility, remaining borrowing capacity

200,000,000

Debt instrument, maturity date

24-Feb-17

Debt instrument, principal amount

52,000,000

121,000,000

Debt Instrument, Carrying Amount

52,000,000

121,000,000

Senior Credit Facility | Thirteenth Amendment

Debt [Line Items]

Current Ratio

100.00%

Debt no greater than EBITDAX

250.00%

Senior Credit Facility | Thirteenth Amendment | Minimum

Debt [Line Items]

Interest Coverage Ratio Of EBITDAX

200.00%

8% Second Lien Senior Secured Notes due 2018

Debt [Line Items]

Debt instrument, maturity date

15-Mar-18

Debt instrument, principal amount

100,000,000

[1]

100,000,000

Number of notes sold

100,000

Debt instrument, principal amount each unit

1,000

Warrant to purchase shares

48.84

Debt Instrument, Maturity Date, Description

If the aggregate principal amount outstanding on the 2032 Notes on August 1, 2017 is more than $25.0 million then the outstanding amount of the Second Lien Notes shall be due on September 1, 2017

Warrant exercise price

$4.66

Warrant expiration period

10 years

Number of days following registration effective date to consummate exchange offer

60 days

Effective interest rate, debt instrument

32.00%

Fair value of debt portion

84,600,000

Debt discount

15,300,000

15,400,000

Equity component of debt

15,400,000

Debt instrument interest rate

8.00%

Debt Instrument, Carrying Amount

84,674,000

[1]

Period of amortization on debt instrument

2 years 6 months

Debt discount amortization end date

1-Sep-17

8% Second Lien Senior Secured Notes due 2018 | First Ninety Days

Debt [Line Items]

Additional interest on principal amount

0.25%

8% Second Lien Senior Secured Notes due 2018 | Each Additional Ninety Days

Debt [Line Items]

Additional interest on principal amount

0.25%

8% Second Lien Senior Secured Notes due 2018 | Scenario 1

Debt [Line Items]

Redeemable redemption price, percentage of principal amount

106.00%

Debt instrument, redemption date

15-Mar-16

8% Second Lien Senior Secured Notes due 2018 | Scenario 2

Debt [Line Items]

Redeemable redemption price, percentage of principal amount

100.00%

Debt instrument, redemption date

15-Mar-17

8% Second Lien Senior Secured Notes due 2018 | Scenario 3

Debt [Line Items]

Redeemable redemption price, percentage of principal amount

35.00%

8% Second Lien Senior Secured Notes due 2018 | Scenario 4

Debt [Line Items]

Redeemable redemption price, percentage of principal amount

108.00%

8% Second Lien Senior Secured Notes due 2018 | Maximum | Each Additional Ninety Days

Debt [Line Items]

Additional interest on principal amount

1.00%

8.875% Senior Notes due 2019

Debt [Line Items]

Debt instrument, maturity date

15-Mar-19

Debt instrument, principal amount

275,000,000

275,000,000

275,000,000

Debt instrument interest rate

8.88%

Debt Instrument, Carrying Amount

275,000,000

275,000,000

8.875% Senior Notes due 2019 | Scenario 1

Debt [Line Items]

Redeemable redemption price, percentage of principal amount

104.44%

Debt instrument, redemption date

15-Mar-15

8.875% Senior Notes due 2019 | Scenario 2

Debt [Line Items]

Redeemable redemption price, percentage of principal amount

102.22%

Debt instrument, redemption date

15-Mar-16

8.875% Senior Notes due 2019 | Scenario 3

Debt [Line Items]

Redeemable redemption price, percentage of principal amount

100.00%

Debt instrument, redemption date

15-Mar-17

5.0% Convertible Senior Notes due 2029

Debt [Line Items]

Debt instrument, maturity date

1-Oct-29

Debt instrument, principal amount

6,692,000

[2]

6,692,000

[2]

218,500,000

Debt instrument interest rate

5.00%

Debt Instrument, Repurchase Amount

45,100,000

Aggregate principal amount retired

166,700,000

Notes to shares converted

28.8534

Principal amount of notes

1,000

Base conversion price per share

$34.66

Debt Instrument, Carrying Amount

6,692,000

[2]

6,692,000

[2]

6,700,000

Conversion price, percentage

135.00%

Number of trading days in the period

20 days

Period of amortization on debt instrument

5 years

Debt discount amortization end date

1-Oct-14

5.0% Convertible Senior Notes due 2032

Debt [Line Items]

Debt instrument, maturity date

1-Oct-32

Debt instrument, principal amount

171,620,000

[3]

170,770,000

[3]

166,300,000

109,250,000

57,000,000

Effective interest rate, debt instrument

8.00%

Fair value of debt portion

158,800,000

Debt discount

4,800,000

5,300,000

7,500,000

Equity component of debt

24,400,000

Debt instrument interest rate

5.00%

Notes to shares converted

28.8534

Principal amount of notes

1,000

Base conversion price per share

$34.66

Debt Instrument, Carrying Amount

166,796,000

[3]

165,504,000

[3]

Period of amortization on debt instrument

4 years

Debt instrument, accretion start date

26-Aug-13

Debt instrument, accretion end date

1-Oct-17

Redemption price, percentage

100.00%

Accretion amount

800,000

Debt discount amortization end date

1-Oct-17

5.0% Convertible Senior Notes due 2032 | Option One

Debt [Line Items]

Debt instrument, redemption date

1-Oct-17

5.0% Convertible Senior Notes due 2032 | Option Two

Debt [Line Items]

Debt instrument, redemption date

1-Oct-22

5.0% Convertible Senior Notes due 2032 | Option Three

Debt [Line Items]

Debt instrument, redemption date

1-Oct-27

5.0% Convertible Senior Notes due 2032 | Minimum

Debt [Line Items]

Debt instrument, redemption date

1-Oct-16

Common stock trading price cap before conversion

$45.06

Conversion price percentage before conversion

130.00%

3.25% Convertible Senior Notes due 2026

Debt [Line Items]

Debt instrument, principal amount

429,000

429,000

Debt instrument interest rate

3.25%

Notes to shares converted

15.1653

Principal amount of notes

1,000

Base conversion price per share

$65.94

Debt Instrument, Carrying Amount

$429,000

$429,000

Incremental share factor

2.68%

3.25% Convertible Senior Notes due 2026 | Scenario 1

Debt [Line Items]

Debt instrument, redemption date

1-Dec-16

3.25% Convertible Senior Notes due 2026 | Scenario 2

Debt [Line Items]

Debt instrument, redemption date

1-Dec-21

[1]

The debt discount is being amortized using the effective interest rate method based upon a two and a half year term through September 1, 2017, the first repurchase date applicable to the Second Lien Notes. The debt discount as of March 31, 2015 was $15.3 million.

[2]

The debt discount was amortized using the effective interest rate method based upon an original five year term through October 1, 2014. The debt discount was fully amortized as of December 31, 2014.

[3]

The debt discount is being amortized using the effective interest rate method based upon a four year term through October 1, 2017, the first repurchase date applicable to the 2032 Notes. The debt discount was $4.8 million and $5.3 million as of March 31, 2015 and December 31, 2014, respectively.

Computations_of_Basic_and_Dilu

Computations of Basic and Diluted Income (Loss) Per Share (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Basic and Diluted loss per share:
Net loss applicable to common stock	($28,549)		($29,923)
Weighted average shares of common stock outstanding	49,110		44,273
Basic and Diluted loss per share	($0.58)	[1],[2],[3]	($0.68)	[1],[2],[3]
[1]	(1) Common shares issuable upon assumed conversion of convertible preferred stock or dividends paid were not presented as they would have been anti-dilutive.
[2]	(2) Common shares issuable upon assumed conversion of the 2026 Notes, 2029 Notes and 2032 Notes or interest paid were not presented as they would have been anti-dilutive.
[3]	(3) Common shares issuable on assumed conversion of restricted stock, stock warrant and employee stock option were not included in the computation of diluted loss per common share since their inclusion would have been anti-dilutive.

Computations_of_Basic_and_Dilu1

Computations of Basic and Diluted Income (Loss) Per Share (Parenthetical) (Detail)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Assumed Conversion of Preferred Stock
Earnings Per Share Disclosure [Line Items]
Common shares issuable upon assumed conversion	3,588	3,588
Assumed Conversion of Notes
Earnings Per Share Disclosure [Line Items]
Common shares issuable upon assumed conversion	4,997	6,298
Assumed Conversion of Restricted Stock, Stock Warrant and Employee Stock Options
Earnings Per Share Disclosure [Line Items]
Common shares issuable upon assumed conversion	7,349	2,434

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2009
Income Tax Disclosure [Abstract]
Income tax expense or benefit	$0
Deferred tax assets, net			0
Unrecognized tax benefits	$0	$0

Summary_of_Gains_and_Losses_on

Summary of Gains and Losses on Derivatives (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Gain (loss) on derivatives not designated as hedges	$4,430	($8,501)

Derivative_Activities_Addition

Derivative Activities - Additional Information (Detail) (USD $)	Mar. 31, 2015
In Millions, unless otherwise specified
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative fair value	$38.50

Outstanding_Commodity_Derivati

Outstanding Commodity Derivative Contracts (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
	MMBTU
Derivative [Line Items]
Fair Value	38,213	$46,878
Not Designated as Hedging Instrument | Natural Gas Calls | Two Thousand Fifteen
Derivative [Line Items]
Fair Value	-152
Not Designated as Hedging Instrument | Natural Gas Calls | Two Thousand And Sixteen
Derivative [Line Items]
Fair Value	-139
Not Designated as Hedging Instrument | Oil Swap Bbl | Two Thousand Fifteen
Derivative [Line Items]
Fair Value	38,504
Not Designated as Hedging Instrument | Minimum | Natural Gas Calls | Two Thousand Fifteen
Derivative [Line Items]
Fixed price, swaps	5.05
Not Designated as Hedging Instrument | Minimum | Natural Gas Calls | Two Thousand And Sixteen
Derivative [Line Items]
Fixed price, swaps	5.05
Not Designated as Hedging Instrument | Minimum | Oil Swap Bbl | Two Thousand Fifteen
Derivative [Line Items]
Fixed price, swaps	94.55
Not Designated as Hedging Instrument | Maximum | Natural Gas Calls | Two Thousand Fifteen
Derivative [Line Items]
Fixed price, swaps	5.06
Not Designated as Hedging Instrument | Maximum | Natural Gas Calls | Two Thousand And Sixteen
Derivative [Line Items]
Fixed price, swaps	5.06
Not Designated as Hedging Instrument | Maximum | Oil Swap Bbl | Two Thousand Fifteen
Derivative [Line Items]
Fixed price, swaps	98.1
Daily | Not Designated as Hedging Instrument | Natural Gas Calls | Two Thousand Fifteen
Derivative [Line Items]
Volume	20,000
Daily | Not Designated as Hedging Instrument | Natural Gas Calls | Two Thousand And Sixteen
Derivative [Line Items]
Volume	20,000
Daily | Not Designated as Hedging Instrument | Oil Swap Bbl | Two Thousand Fifteen
Derivative [Line Items]
Volume	3,500
Remaining Volumes | Not Designated as Hedging Instrument | Natural Gas Calls | Two Thousand Fifteen
Derivative [Line Items]
Volume	5,500,000
Remaining Volumes | Not Designated as Hedging Instrument | Natural Gas Calls | Two Thousand And Sixteen
Derivative [Line Items]
Volume	7,320,000
Remaining Volumes | Not Designated as Hedging Instrument | Oil Swap Bbl | Two Thousand Fifteen
Derivative [Line Items]
Volume	962,500

Derivative_Assets_and_Liabilit

Derivative Assets and Liabilities Recorded at Fair Value (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Derivative [Line Items]
Fair value of oil and natural gas derivatives	$38,504	$47,444
Current Liabilities Commodity Derivatives	-152	-102
Non-current Liabilities Commodity Derivatives	-139	-464
Total	38,213	46,878
Level 2
Derivative [Line Items]
Fair value of oil and natural gas derivatives	38,504
Current Liabilities Commodity Derivatives	-152
Non-current Liabilities Commodity Derivatives	-139
Total	$38,213

Reconciliation_of_Gross_Amount

Reconciliation of Gross Amounts to Amounts as Presented on Statement of Financial Position (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Derivative [Line Items]
Derivative Current Asset	$38,504	$47,444
Derivative Current Liability	-152	-102
Derivative Non-current Liability	-139	-464
Total	38,213	46,878
Gross Amount
Derivative [Line Items]
Derivative Current Asset	38,504	47,444
Derivative Current Liability	-152	-102
Derivative Non-current Liability	-139	-464
Total	$38,213	$46,878

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended
	Mar. 10, 2015	Mar. 31, 2015	Dec. 31, 2014	Mar. 12, 2015
Stockholders Equity [Line Items]
Common stock issued in public offering	12,000,000
Common stock, price	$4.15
Proceeds from public offering of common stock	$48,000,000
Common stock par value, per share		$0.20	$0.20
Second Lien Notes
Stockholders Equity [Line Items]
Detachable warrant issued, each unit		1,000
Right to purchase common stock per warrant		48.84
Warrant exercise price				$4.66
Warrant expiration period		10 years
Equity component of debt		$15,400,000