Goodrich Petroleum 10-K 30 Mar 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Mar. 23, 2016	Jun. 30, 2015
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Trading Symbol	GDP
Entity Registrant Name	GOODRICH PETROLEUM CORP
Entity Central Index Key	943,861
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		78,063,640
Entity Public Float			$ 99.2

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
CURRENT ASSETS:
Cash and cash equivalents	$ 11,782	$ 8
Accounts receivable, trade and other, net of allowance	1,255	12,993
Accrued oil and natural gas revenue	3,421	15,128
Fair value of oil and natural gas derivatives		47,444
Inventory	5,652	1,383
Prepaid expenses and other	1,119	1,340
Total current assets	23,229	78,296
PROPERTY AND EQUIPMENT:
Oil and natural gas properties (successful efforts method)	974,012	1,478,042
Furniture, fixtures and equipment	7,592	7,645
Property, Plant and Equipment, Gross, Total	981,604	1,485,687
Less: Accumulated depletion, depreciation and amortization	(911,072)	(871,082)
Net property and equipment	70,532	614,605
Deferred tax assets	26	16,488
Deferred financing cost and other	5,186	12,749
TOTAL ASSETS	98,973	722,138
CURRENT LIABILITIES:
Accounts payable	19,673	86,823
Accrued liabilities	12,508	54,143
Asset retirement obligation	83	145
Deferred tax liabilities current	26	16,488
Fair value of oil and natural gas derivatives	30	102
Current portion of debt	470,603
Total current liabilities	502,923	157,701
Long term debt		568,625
Asset retirement obligation	3,645	6,365
Fair value of oil and natural gas derivatives		464
Transportation obligation		4,127
Other non-current liability	490	630
Total liabilities	$ 507,058	$ 737,912
Commitments and contingencies (See Note 9)
STOCKHOLDERS’ EQUITY/(DEFICIT):
Common stock: $0.20 par value, 150,000,000 shares authorized, issued and outstanding 63,910,300 and 45,105,205 shares, respectively	$ 12,782	$ 9,021
Treasury stock (173,440 and zero shares, respectively)	(41)
Additional paid in capital	1,069,673	1,066,770
Retained earnings (accumulated deficit)	(1,492,001)	(1,093,824)
Total stockholders’ equity/(deficit)	(408,085)	(15,774)
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY/(DEFICIT)	98,973	722,138
Series B Cumulative Convertible Preferred Stock
STOCKHOLDERS’ EQUITY/(DEFICIT):
Preferred stock	1,491	2,250
Series C Cumulative Preferred Stock
STOCKHOLDERS’ EQUITY/(DEFICIT):
Preferred stock	3	4
Series D Cumulative Preferred Stock
STOCKHOLDERS’ EQUITY/(DEFICIT):
Preferred stock	4	$ 5
Series E Cumulative Preferred Stock
STOCKHOLDERS’ EQUITY/(DEFICIT):
Preferred stock	$ 4

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 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	150,000,000	150,000,000
Common stock, shares issued	63,910,300	45,105,205
Common stock, shares outstanding	63,910,300	45,105,205
Treasury stock, shares	173,440	0
Series B Cumulative Convertible Preferred Stock
Preferred stock, shares issued	1,491,459	2,250,000
Preferred stock, shares outstanding	1,491,459	2,250,000
Series C Cumulative Preferred Stock
Preferred stock, shares issued	3,125	4,400
Preferred stock, shares outstanding	3,125	4,400
Series D Cumulative Preferred Stock
Preferred stock, shares issued	3,736	5,200
Preferred stock, shares outstanding	3,736	5,200
Series E Cumulative Preferred Stock
Preferred stock, shares issued	3,553	0
Preferred stock, shares outstanding	3,553	0

Consolidated Statements Of Oper

Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
REVENUES:
Oil and natural gas revenues	$ 79,077	$ 208,544	$ 202,557
Other	(1,427)	9	738
Total revenues	77,650	208,553	203,295
OPERATING EXPENSES:
Lease operating expense	15,522	29,525	27,293
Production and other taxes	4,639	9,905	9,812
Transportation and processing	4,663	9,070	10,498
Depreciation, depletion and amortization	79,339	135,716	135,357
Exploration	41,783	6,206	22,774
Impairment	452,037	331,931
General and administrative	27,702	33,728	34,069
(Gain) loss on sale of assets	(53,451)	3,499	(107)
Other	(45)	3,793	(91)
Operating Expenses, Total	572,189	563,373	239,605
Operating loss	(494,539)	(354,820)	(36,310)
OTHER INCOME (EXPENSE):
Interest expense	(54,807)	(47,829)	(51,187)
Interest income and other		90	101
Gain (loss) on derivatives not designated as hedges	7,367	49,423	(702)
Gain (loss) on extinguishment of debt	62,555		(7,088)
Nonoperating Income (Expense), Total	15,115	1,684	(58,876)
Loss before income taxes	(479,424)	(353,136)	(95,186)
Net loss	(479,424)	(353,136)	(95,186)
Preferred stock ,net (See Note 7)	(69,544)	29,722	18,604
Net loss applicable to common stock	$ (409,880)	$ (382,858)	$ (113,790)
PER COMMON SHARE
Net loss applicable to common stock—basic	$ (7.28)	$ (8.62)	$ (2.99)
Net loss applicable to common stock—diluted	$ (7.28)	$ (8.62)	$ (2.99)
Weighted average common shares outstanding—basic	56,315	44,402	38,098
Weighted average common shares outstanding—diluted	56,315	44,402	38,098

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (479,424)	$ (353,136)	$ (95,186)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depletion, depreciation and amortization	79,339	135,716	135,357
(Gain) loss on derivatives not designated as hedges	(7,367)	(49,423)	702
Net cash received (paid) in settlement of derivative instruments	54,274	3,417	(3,786)
Impairment	452,037	331,931
Exploration costs	7,404	785	4,728
Amortization of leasehold costs	32,209	3,108	13,675
Share based compensation (non-cash)	6,689	9,555	7,680
(Gain) loss on sale of assets	(53,451)	3,499	(107)
(Gain) loss on extinguishment of debt	(62,555)		7,088
Amortization of finance cost and debt discount	12,415	9,979	12,745
Material inventory write-down	1,168
Amortization of transportation obligation	469	804	1,226
Change in assets and liabilities:
Accounts receivable, trade and other, net of allowance	11,573	(9,881)	3,965
Accrued oil and natural gas revenue	11,707	3,540	(401)
Inventory	(5,822)	693	126
Prepaid expenses and other	785	1,279	386
Accounts payable	(70,993)	35,694	(22,543)
Accrued liabilities	(7,468)	(5,829)	5,750
Net cash (used in) provided by operating activities	(17,011)	121,731	71,405
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(118,407)	(322,352)	(251,103)
Proceeds from sale of assets	113,533	53,932	449
Net cash used in investing activities	(4,874)	(268,420)	(250,654)
CASH FLOWS FROM FINANCING ACTIVITIES:
Principal payments of bank borrowings	(332,500)	(255,000)	(382,800)
Proceeds from bank borrowings	238,500	376,000	287,800
Proceeds from preferred stock offering			230,625
Proceeds from equity offering	47,480		166,149
Proceeds from Second Lien Notes	100,000
Principal payments of long-term debt	(88)
Note conversions	(434)
Repurchase of convertible notes		(45,124)
Debt issuance costs	(4,027)	(649)	(4,636)
Preferred stock dividends	(14,861)	(29,722)	(18,604)
Cash restricted for repurchase of convertible notes		51,816	(51,816)
Exercise of stock options and warrants		140	807
Other	(411)	16	(244)
Net cash provided by (used in) financing activities	33,659	97,477	227,281
Increase (decrease) in cash and cash equivalents	11,774	(49,212)	48,032
Cash and cash equivalents, beginning of period	8	49,220	1,188
Cash and cash equivalents, end of period	11,782	8	49,220
Supplemental disclosures of cash flow information:
Cash paid during the year for interest	$ 22,279	$ 39,169	$ 38,087

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity/(Deficit) - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings/ (Deficit)
Balance at Dec. 31, 2012	$ 60,245	$ 2,250	$ 7,352	$ 648,458	$ (639)	$ (597,176)
Balance, Preferred Stock at Dec. 31, 2012		2,250,000
Balance, Common Stock at Dec. 31, 2012			36,758,000
Balance, Treasury Stock at Dec. 31, 2012					(77,000)
Net loss	(95,186)					(95,186)
Equity portion of convertible notes redeemed	4,398			4,398
Employee stock plans (in shares)			594,000
Employee stock plans	7,680		$ 119	7,561
Director stock grants (in shares)			47,000
Director stock grants	646		$ 9	637
Repurchases of stock (in shares)					(3,000)
Repurchases of stock	(74)				$ (74)
Options exercised (in shares)			41,000
Options exercised	807		$ 8	799
Preferred stock offering (in shares)		9,000
Preferred stock offering	230,625	$ 9		230,616
Equity offering (in shares)			6,900,000
Equity offering	166,149		$ 1,380	164,769
Retirement of stock (in shares)			(81,000)		80,000
Retirement of stock			$ (16)	(697)	$ 713
Other	(163)			(163)
Dividends	(18,604)					(18,604)
Balance at Dec. 31, 2013	356,523	$ 2,259	$ 8,852	1,056,378		(710,966)
Balance, Preferred Stock at Dec. 31, 2013		2,259,000
Balance, Common Stock at Dec. 31, 2013			44,259,000
Net loss	(353,136)					(353,136)
Employee stock plans (in shares)			802,000
Employee stock plans	9,555		$ 160	9,395
Director stock grants (in shares)			38,000
Director stock grants	866		$ 8	858
Options exercised (in shares)			6,000
Options exercised	140		$ 1	139
Dividends	(29,722)					(29,722)
Balance at Dec. 31, 2014	$ (15,774)	$ 2,259	$ 9,021	1,066,770		(1,093,824)
Balance, Preferred Stock at Dec. 31, 2014		2,259,000
Balance, Common Stock at Dec. 31, 2014	45,105,205		45,105,000
Balance, Treasury Stock at Dec. 31, 2014	0
Net loss	$ (479,424)					(479,424)
Employee stock plans (in shares)			870,000
Employee stock plans	6,689		$ 174	6,515
Note conversions (in shares)			5,209,000
Note conversions	16,637		$ 1,042	15,595
Preferred stock exchange (in shares)		(757,000)
Preferred stock exchange	(95,680)	$ (757)		(94,923)
Director stock grants (in shares)			249,000
Director stock grants	685		$ 50	635
Repurchases of stock (in shares)					(173,000)
Repurchases of stock	(41)				$ (41)
Equity offering (in shares)			12,000,000
Equity offering	47,480		$ 2,400	45,080
Preferred stock conversions (in shares)			477,000
Preferred stock conversions	(54)		$ 95	(149)
Warrant issuance	17,473			17,473
Convertible note issuance	12,677			12,677
Dividends	81,247					81,247
Balance at Dec. 31, 2015	$ (408,085)	$ 1,502	$ 12,782	$ 1,069,673	$ (41)	$ (1,492,001)
Balance, Preferred Stock at Dec. 31, 2015		1,502,000
Balance, Common Stock at Dec. 31, 2015	63,910,300		63,910,000
Balance, Treasury Stock at Dec. 31, 2015	(173,440)				(173,000)

Description of Business, Manage

Description of Business, Management Plan and Accounting Policies	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Description of Business and Significant Accounting Policies	NOTE 1—Description of Business, Management Plan and 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) Northwest Louisiana and East Texas, which includes the Haynesville Shale, and (iii) South Texas, which includes the Eagle Ford Shale Trend. The report of our independent registered public accounting firm that accompanies our audited consolidated financial statements for the year ended December 31, 2015 contains an explanatory paragraph regarding the substantial doubt about our ability to continue as a going concern As a result, we are in default of an affirmative covenant under our Second Amended and Restated Credit Agreement (including all amendments, the “Senior Credit Facility”). As a result of the default, we are unable to make further draws on the Senior Credit Facility unless the default is waived by the lenders under our Senior Credit Facility. We elected to exercise our right to a grace period with respect to interest payments due on our 2019 Notes, our 8.0% Second Lien Notes and our 8.875% Second Lien Notes. The interest payments were due on March 15, 2016. Additionally, we have announced our intention to elect the right to a grace period with respect to interest payments due on, our 2029 Notes, our 2032 Notes and 2032 Exchange Notes. The interest payments are due on April 1, 2016. The grace periods permit us 30 days to make such interest payments before an event of default occurs under the indentures. Though, an event of default has not yet occurred, accounting principles generally accepted in the United States (“US GAAP”) 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 significant and sustained 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 2015 and 2016 to mitigate the effects of lower crude oil prices on our operations and conserve capital: 1 . Reduced our capital expenditures for 2015 as compared to 2014. 2 . Extended the maturity of our Senior Credit Facility to February 24, 2017. 3 . Received proceeds of $100 million from the issuance of 8.0% Second Lien Senior Secured Notes due 2018 (the “8.0% Second Lien Notes”). 4 . Received net proceeds of $47.5 million from the sale of 12,000,000 shares of our common stock to the public. 5 . Reduced staff headcount by more than 50% from year-end 2014 levels thereby reducing expenses. 6 . Closed the sale of proved reserves and a portion of the associated leasehold in the Eagle Ford Shale Trend in September 2015 for proceeds of $110.0 million. The proceeds were used to pay off borrowings under the Senior Credit Facility. 7 . Exchanged an aggregate of $72.1 million of our 5.0% Senior Convertible Notes due 2032 (the “2032 Notes”) for $36.0 million of new 5.0% Convertible Exchange Senior Notes due 2032 (the “2032 Exchange Notes”) 8 . Exchanged $158.2 million of our 8.875% Senior Notes due 2019 (the “2019 Notes”) for $75.0 million of 8.875% Second Lien Notes due 2018 (the “8.875% Second Lien Notes” and, together with the 8.0% Second Lien Notes, the “Second Lien Notes”) 9. Suspended all preferred stock dividend payments beginning in the third quarter of 2015 due to a lack of surplus as defined under Delaware state law and to conserve capital. 10 . We retired 758,434 shares of our 5.375% Series B Cumulative Convertible Preferred Stock (the “Series B Preferred Stock”), 1,274,932 depositary shares of our 10% Series C Cumulative Preferred Stock (the “Series C Preferred Stock”) and 1,463,759 depositary shares of our 9.75% Series D Cumulative Preferred Stock (the “Series D Preferred Stock”) for 3,648,803 depositary shares of our newly issued 10% Series E Cumulative Convertible Preferred Stock (the “Series E Preferred Stock”). The 10% Series E Preferred Stock is convertible into our common stock and dividends, when declared, will be paid at our option in cash, our $0.20 par value common stock or any combination of the two. 11 . In January 2016, we initiated the Recapitalization Plan (see below). Recapitalization Plan In response to the decline of our operating cash flow, on January 26, 2016, the Company launched a comprehensive plan to reduce its cost structure and improve its operating results, cash flow from operations, liquidity and financial condition (the “ Recapitalization Plan · Offers to exchange (the “ Preferred Stock Exchange Offers · Offers to exchange (the “ Unsecured Notes Exchange Offers 3.25% Convertible Senior Notes due 2026 (the “2026 Notes”) 5.0% Convertible Senior Notes due 2029 (the “2029 Notes”) · Private negotiations with holders of its Second Lien Notes to offer to exchange (the “ Second Lien Exchange Offers Exchange Offers · Upon completion of the Exchange Offers, the Company plans to amend its 2006 Long-Term Incentive Plan (the “ 2006 Plan If successful, the Recapitalization Plan will have several positive effects on the Company’s capital structure and the holders of our common stock, including: (i) the reduction in debt and preferred liquidation preference versus substantial dilution to the Company’s outstanding common stock expected to result from the Recapitalization Plan; (ii) the reduction of the Company’s fixed dividend obligations and the increase in the percentage of its capitalization that is common stock; (iii) the simplification of the Company’s capital structure and the elimination of the market overhang caused by the outstanding Preferred Stock and the liquidation preferences of the Preferred Stock; (iv) expected improvements in institutional investor interest in the Company’s common stock following the Recapitalization Plan due to an improved balance sheet and (v) the increased ability of the Company to address its near-term liquidity needs, including the material reduction of cash interest expense on the Company’s secured debt obligations and the increased likelihood of attracting new capital due to a significantly improved balance sheet. The Recapitalization Plan is intended to facilitate a proposed recapitalization of the Company in an effort to simplify its capital structure, preserve liquidity and increase its ability to comply with its debt instruments during the current decline in the oil and gas industry. The Exchange Offers are conditioned, among other things, on (i) the Company’s common shareholders approving an amendment to the Company’s Restated Certificate of Incorporation increasing the number of authorized shares of common stock to 400 million (the “Authorized Share Amendment Proposal”) and (ii) the satisfaction of certain minimum participation thresholds according to the terms of each of the Exchange Offers. The Company will hold a special meeting of stockholders on March 31, 2016 to approve the Authorized Share Amendment Proposal. Going Concern The accompanying consolidated financial statements have been prepared assuming the Company will continue as a going concern, which contemplates continuity of operations, realization of assets and the satisfaction of liabilities in the normal course of business for the twelve month period following the date of these consolidated financial statements. As such, the accompanying consolidated financial statements do not include any adjustments relating to the recoverability and classification of assets and their carrying amounts, or the amount and classification of liabilities that may result should the Company be unable to continue as a going concern. Given the downturn in oil and natural gas prices, we expect to continue to face liquidity constraints. Our cash flows are negatively impacted by lower realized oil and natural gas sales prices. As of December 31, 2015 we no longer had any oil derivative contracts in place. Given the current oil futures pricing, we currently have limited hedging opportunities; as a result, we do not anticipate having in place any derivative positions with respect to our 2016 anticipated oil and condensate sales volumes and thus expect further deteriorating realized sale prices if oil prices do not improve. The significant decline in oil and natural gas prices also increases the uncertainty as to the impact of commodity prices on our estimated proved reserves. We are unable to predict future commodity prices with any greater precision than the futures market. The prolonged period of depressed commodity prices has significantly impacted our estimated proved reserves as of December 31, 2015. Future declines in commodity prices and estimated proved reserves could lead to further reductions of our borrowing base under the Senior Credit Facility. Such reductions could prevent us from borrowing additional amounts under the Senior Credit Facility or, if the borrowing base were to be reduced below the then-outstanding borrowings, could require us to repay the shortfall and could otherwise limit our ability to obtain alternative financing. Without the restructuring of our current obligations under our existing outstanding debt and preferred stock instruments, we anticipate that we will violate the First Lien Debt to EBITDAX financial covenant ratio under the Senior Credit Facility at the end of the third quarter of 2016. We could request a waiver of this covenant violation; however, there is no assurance a waiver will be granted. If a waiver is not granted, we would be in default under the Senior Credit Facility and all amounts outstanding under the Senior Credit Facility would be immediately due and payable. The obligation to repay all such amounts could force us to seek bankruptcy protection. Collectively, the factors discussed above raise substantial doubt about our ability to continue as a going concern. Furthermore, if we are unable to , and address near-term liquidity needs, we may need to seek relief under the U.S. Bankruptcy Code. This relief may include: (i) seeking bankruptcy court approval for the sale or sales of some, most or substantially all of the Company’s assets pursuant to section 363(b) of the U.S. Bankruptcy Code and a subsequent liquidation of the remaining assets in the bankruptcy case; (ii) pursuing a plan of reorganization (where votes for the plan may be solicited from certain classes of creditors prior to a bankruptcy filing) that the Company would seek to confirm (or “cram down”) despite any classes of creditors who reject or are deemed to have rejected such plan; or (iii) seeking another form of bankruptcy relief, all of which involve uncertainties, potential delays and litigation risks. Principles of Consolidation —The consolidated financial statements of the Company are included in this Annual Report on Form 10-K have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) and in accordance with US GAAP. The consolidated financial statements include the financial statements of Goodrich Petroleum Corporation 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 include cash on hand, demand deposit accounts and temporary cash investments with maturities of ninety days or less at date of purchase. Allowance for Doubtful Accounts —We routinely assess the recoverability of all material trade and other receivables to determine their collectability. Many of our receivables are from a limited number of purchasers. Accordingly, accounts receivable from such purchases could be significant. Generally, our natural gas and crude oil receivables are collected within thirty to sixty days of production. We also have receivables from joint interest owners of properties we operate. We may have the ability to withhold future revenue disbursements to recover any non-payment of joint interest billings. We accrue a reserve on a receivable when, based on the judgment of management, it is probable that a receivable will not be collected and the amount of the reserve may be reasonably estimated. As of December 31, 2015 our allowance for doubtful accounts was immaterial, while at December 31, 2014 we had no allowance for doubtful accounts. Inventory –Inventory consists of casing and tubulars that are expected to be used in our capital drilling program and oil in storage tanks. Inventory is carried on the Consolidated Balance Sheets at the lower of cost or market. Property and Equipment —We follow the successful efforts method of accounting for exploration and development expenditures. 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. Exploration —Exploration expenditures, including geological and geophysical costs, delay rentals and exploratory dry hole costs are expensed as incurred. Costs of drilling exploratory wells are initially capitalized pending determination of whether proved reserves can be attributed to the discovery. If management determines that commercial quantities of hydrocarbons have not been discovered, capitalized costs associated with exploratory wells are expensed. We had no capitalized exploratory well costs that were pending the determination of proved reserves as of December 31, 2015 and had $14.5 million as of December 31, 2014. During 2015 and 2014, all of the December 31, 2014 and December 31 2013 pending exploratory well costs were capitalized, respectively. During 2013 $4.4 million of the December 31, 2012 pending capitalized costs were expensed. 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 is our senior notes; · Level 2 Inputs—quotes which are derived principally from or corroborated by observable market data. Included in this level are our Senior Credit Facility 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, our 2032 Exchange Notes, 8.0% Second Lien Notes, the embedded derivative associated with the 8.0% Second Lien Notes (see Note 4) and 8.875% Second Lien Notes. As of December 31, 2015 and 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. Fair Value Measurements as of December 31, 2015 (in thousands) Description Level 1 Level 2 Level 3 Total Recurring Fair Value Measurements Commodity derivatives (see Note 8) $ — $ (30 ) $ — $ (30 ) Debt (see Note 4) (16,336 ) (27,064 ) (48,747 ) (92,147 ) Total recurring fair value measurements $ (16,336 ) $ (27,094 ) $ (48,747 ) $ (92,177 ) Nonrecurring Fair Value Measurements Impaired oil and natural gas properties $ — $ — $ 63,395 $ 63,395 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 overstated or carried in excess of fair value, which is computed using level 3 inputs such as discounted cash flow models or valuations. Significant level 3 assumptions associated with discounted cash flow models or valuations used in the impairment evaluation include estimates of future crude oil and natural gas prices, production costs, development expenditures, anticipated production of proved reserves, appropriate risk-adjusted discount rates and other relevant data. 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. To determine if a field is impaired, we compare the carrying value of the field to the undiscounted future net cash flows by applying management’s estimates of proved reserves, future oil and natural gas prices, future production of oil and natural gas reserves and future operating costs over the economic life of the property. In addition, other factors such as probable and possible reserves are taken into consideration when justified by economic conditions and the availability of capital to develop proved undeveloped reserves. For each property determined to be impaired, we recognize an impairment loss equal to the difference between the estimated fair value and the carrying value of the field. Fair value is estimated to be the present value of expected future net cash flows. Any impairment charge incurred is recorded in accumulated depletion, depreciation and amortization to reduce the carrying value of the field. Each part of this calculation is subject to a large degree of judgment, including the determination of the fields’ estimated reserves, future cash flows and fair value. As of December 31, 2015, we had interests in oil and natural gas properties totaling $69.6 million, net of accumulated depletion, which we account for under the successful efforts method. The expected future cash flows used for impairment reviews and related fair-value calculations are based on judgmental assessments of future production volumes, prices, and costs, considering all available information at the date of review. Due to the uncertainty inherent in these factors, we cannot predict when or if additional future impairment charges will be recorded. We estimate future net cash flows generated from our oil and natural gas properties using forecasted oil and natural gas prices published by the New York Mercantile Exchange (“NYMEX”). In the third and fourth quarters of 2015, the average NYMEX 5-year forward strip pricing for oil and natural gas had significantly decreased compared to year end 2014. The declines Our impairment analysis in the third quarter of 2015 resulted in the recording a impairment on certain of our natural gas properties, During the fourth quarter of 2015, NYMEX forward 5-year strip oil prices continued to decline by an average of 16% and natural gas strip prices continued to decline by an average of 6%. The price declines in the fourth quarter of 2015 resulted in recording an additional impairment of $419.6 million on both our oil and natural gas properties. The $419.5 million impairment recognized in the fourth quarter of 2015 reduced the carrying value of the impaired fields to an estimated fair value of $63.4 million as of December 31, 2015. In the aggregate we recorded $452.0 million of impairments during 2015. For the year ended December 31, 2014 we recorded $ 331.9 million of impairments. 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 exchange for these services, we agreed to pay the service provider 110 percent of the total capital cost incurred by the service provider to construct new pipelines and facilities. The service provider bills us for 20 percent of the accumulated unpaid capital costs annually. This obligation was relieved upon the sale of our Eagle Ford Shale Trend properties in September 2015, however we are obligated to pay the 2015 annual billing. As a result, the transportation obligation liability was reduced to $1.0 million as of December 31, 2015. The transportation obligation liability was $5.4 million as of 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 was being amortized using the units-of-production method and the amortization expense was included in “Transportation and processing” on the Consolidated Statements of Operations. The related current and long-term liabilities were 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. The estimated fair value of the Company’s asset retirement obligations at inception is determined by utilizing the income approach by applying a credit-adjusted risk-free rate, which takes into account the Company’s credit risk, the time value of money, and the current economic state, to the undiscounted expected abandonment cash flows. Given the unobservable nature of the inputs, the measurement of the asset retirement obligations was classified as Level 3 in the fair value hierarchy. 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 December 31, 2015 and 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. We have not designated any of our derivative contracts as hedges; accordingly, changes in fair value are reflected in earnings. Income Taxes —We account for income taxes, as required, under the liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carry-forwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion or all of the deferred tax assets will not be realized. We recognize, as required, the financial statement benefit of an uncertain tax position only after determining that the relevant tax authority would more likely than not sustain the position following an audit. For tax positions meeting the more-likely-than-not threshold, the amount recognized in the financial statements is the largest benefit that has a greater than 50 percent likelihood of being realized upon ultimate settlement with the relevant tax authority. Earnings Per Share —Basic income or loss per common share is computed by dividing net income or loss available to common stockholders for each reporting period by the weighted-average number of common shares outstanding during the period. Diluted income or loss per common share is computed by dividing net income or loss available 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 and restricted stock calculated using the Treasury Stock method and the potential dilutive effect of the conversion of shares associated with Series B Preferred Stock, Series E Preferred Stock, 2026 Notes, 2029 Notes, 2032 Notes and the 2032 Exchange Notes. 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. Concentration of Credit Risk —Due to the nature of the industry, we sell our oil and natural gas production to a limited number of purchasers and, accordingly, amounts receivable from such purchasers could be significant. The revenues compared to our total oil and natural gas revenues from the top purchasers for the years ended December 31, 2015, 2014 and 2013 are as follows: Year Ended December 31, 2015 2014 2013 BP Energy Company 31 % 46 % 64 % Genesis Crude Oil LP 26 % 11 % 7 % Sunoco, Inc. 17 % 5 % — Share-Based Compensation —We account for our share-based transactions using fair value and recognize compensation expense over the requisite service period. The fair value of each option award is estimated using a Black-Scholes option valuation model with various assumptions based on our estimates. Our assumptions include expected volatility, expected term of option, risk-free interest rate and dividend yield. Expected volatility estimates are developed by us based on historical volatility of our stock. We use historical data to estimate the expected term of the options. The risk-free interest rate for periods within the expected life of the option is based on the U.S. Treasury yield in effect at the grant date. Our common stock does not pay dividends; therefore, the dividend yield is zero. The fair value of each restricted stock award is measured using the closing price of our common stock on the day of the award. Guarantee —On March 2, 2011, we issued and sold $275 million aggregate principal amount of our 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. On March 12, 2015, we issued and sold $100 million aggregate principal amount of our 8.0% Second Lien Notes and upon issuance our subsidiary became the guarantor of the 8.0% Second Lien Notes under the governing indenture. On September 8, 2015 and October 14, 2015, we issued $27.5 million and $8.5 million, respectively, aggregate principal amount of our 2032 Exchange Notes and, upon issuance, our subsidiary became the guarantor of the 2032 Exchange Notes under the governing indenture. On October 1, 2015, we issued and sold $75 million aggregate principal amount of our 8.875% Second Lien Notes and upon issuance our subsidiary became the guarantor of the 8.875% Second Lien Notes under the governing indenture. The 2019 Notes, 2029 Notes, 2026 Notes, 2032 Notes, 8.0% Second Lien Notes, 2032 Exchange Notes, and 8.875 Second Lien Notes are guaranteed on a senior unsecured basis by our wholly-owned subsidiary, Goodrich Petroleum Company, L.L.C. Goodrich Petroleum Corporation, as

Share-Based Compensation Plans

Share-Based Compensation Plans	12 Months Ended
	Dec. 31, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share-Based Compensation Plans	NOTE 2—Share-Based Compensation Plans Overview At our annual meeting of stockholders in May 2006, our shareholders approved our 2006 Long-Term Incentive Plan (the “2006 Plan”). The 2006 Plan provides for grants to officers, employees and non-employee directors. Under the 2006 Plan as amended in 2015, a maximum of 7.0 million shares are authorized for issuance as awards of restricted stock and stock options. We had 3.1 million shares of granted but unvested restricted stock and zero shares were available for future grants as of December 31, 2015. The 2006 Plan is intended to promote the interests of the Company by providing a means by which employees, consultants and directors may acquire or increase their equity interest in the Company and may develop a sense of proprietorship and personal involvement in the development and financial success of the Company, and to encourage them to remain with and devote their best efforts to the business of the Company, thereby advancing the interests of the Company and its stockholders. The 2006 Plan is also intended to enhance the ability of the Company and its Subsidiary to attract and retain the services of individuals who are essential for the growth and profitability of the Company. The 2006 Plan provides that the Compensation Committee shall have the authority to determine the participants to whom stock options, restricted stock, performance awards, phantom shares and stock appreciation rights may be granted. We measure the cost of stock based compensation granted, including stock options and restricted stock, based on the fair value of the award as of the grant date, net of estimated forfeitures. Awards granted are valued at fair value and recognized on a straight-line basis over the service periods (or the vesting periods) of each award. We estimate forfeiture rates for all unvested awards based on our historical experience. The following table summarizes the pretax components of our share-based compensation programs recorded, recognized as a component of general and administrative expenses in the Consolidated Statements of Operations (in thousands): Year Ended December 31, 2015 2014 2013 Restricted stock expense $ 6,689 $ 9,555 $ 7,586 Stock option expense — — 94 Director stock expense 754 734 568 Total share-based compensation: $ 7,443 $ 10,289 $ 8,248 Stock Options The 2006 Plan provides that the option price of shares issued be equal to the market price on the date of grant. With the exception of option grants to non-employee directors, which vest immediately, options vest ratably on the anniversary of the date of grant over a period of time, typically three years. Our stock options expire in seven or ten years after the date of grant. Option activity under our stock option plans as of December 31, 2015, and changes during the year ended December 31, 2015 were as follows: Shares Weighted Average Exercise Price Remaining Contractual Term Aggregate Intrinsic Value (years) (thousands) Outstanding at January 1, 2015 690,834 $ 22.83 1.02 $ 88 Granted — — — — Exercised — — — — Forfeited 630,834 22.35 — — Outstanding at December 31, 2015 60,000 $ 27.81 0.36 — Exercisable at December 31, 2015 60,000 $ 27.81 0.36 — The aggregate intrinsic value in the preceding table represents the total pre-tax intrinsic value (the difference between our closing stock price on the last trading day of the fourth quarter of 2015 and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their options on December 31, 2015. The amount of aggregate intrinsic value will change based on the fair market value of our stock. The total intrinsic value of options exercised during the years ended December 31, 2015, 2014 and 2013 was less than $0.3 million. The outstanding options had no intrinsic value as of December 31, 2015. Options Outstanding Options Exercisable Range of Exercise Prices Number Outstanding December 31, 2015 Weighted Average Remaining Contractual Life Weighted Average Exercise Price Number Exercisable December 31, 2015 Weighted Average Exercise Price (years) $27.81 60,000 0.36 27.81 60,000 27.81 60,000 0.36 27.81 60,000 27.81 As of December 31, 2015, all compensation cost related to the stock options has been recognized in earnings. No stock options were granted in 2015, 2014 or 2013. Restricted Stock In 2003, we began granting a series of restricted stock awards. Restricted stock awarded under the 2006 Plan typically has a vesting period of three years. During the vesting period, ownership of the shares cannot be transferred and the shares are subject to forfeiture if employment ends before the end of the vesting period. Certain restricted stock awards provide for accelerated vesting. Restricted shares are not considered to be currently issued and outstanding until the restrictions lapse and/or they vest. Restricted stock activity and values under our plan for the years ended December 31, 2015, 2014 and 2013 were as follows: Number of Shares Granted Value of Shares Granted Fair Value of Stock Vested (thousands) (thousands) 2015 2,679,580 $ 2,525 $ 394 2014 1,192,114 5,368 6,425 2013 746,163 13,194 9,960 Restricted stock activity under our plan for the year ended December 31, 2015, and changes during the year then ended were as follows: Number of Shares Weighted Average Grant-Date Fair Value Total Value (thousands) Unvested at January 1, 2015 1,939,940 $ 8.26 $ 16,018 Vested (870,500 ) 7.84 (6,827 ) Granted 2,679,580 0.94 2,512 Forfeited (612,169 ) 7.57 (4,637 ) Unvested at December 31, 2015 3,136,851 — $ 7,066 As of December 31, 2015, total unrecognized compensation cost related to restricted stock is as follows: Unrecognized compensation costs Weighted Average years to recognition (thousands) (years) December 31, 2015 $ 6,556 1.56

Asset Retirement Obligations

Asset Retirement Obligations	12 Months Ended
	Dec. 31, 2015
Asset Retirement Obligation Disclosure [Abstract]
Asset Retirement Obligations	NOTE 3—Asset Retirement Obligations The reconciliation of the beginning and ending asset retirement obligation for the periods ending December 31, 2015 and 2014 is as follows (in thousands): December 31, 2015 2014 Beginning balance $ 6,510 $ 20,856 Liabilities incurred 15 385 Revisions in estimated liabilities — 53 Liabilities settled (62 ) (5 ) Accretion expense 434 1,420 Dispositions (1) (3,169 ) (16,199 ) Ending balance $ 3,728 $ 6,510 Current liability $ 83 $ 145 Long term liability $ 3,645 $ 6,365 (1) The majority of the 2015 dispositions represent the divestiture of our producing Eagle Ford Shale Trend properties. The majority of the 2014 dispositions represent the divestiture of our East Texas properties.

Debt

Debt	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Debt	NOTE 4—Debt Debt consisted of the following balances as of the dates indicated (in thousands): December 31, 2015 December 31, 2014 Principal Carrying Amount Fair Value (1) Principal Carrying Amount Fair Value (1) Senior Credit Facility $ 27,000 $ 27,000 $ 27,000 $ 121,000 $ 121,000 $ 121,000 8.0% Second Lien Senior Secured Notes due 2018 (2) 100,000 88,971 14,512 — — — 8.875% Second Lien Senior Secured Notes due 2018 75,000 91,364 7,586 — — — 8.875% Senior Notes due 2019 116,828 116,828 9,346 275,000 275,000 136,125 3.25% Convertible Senior Notes due 2026 429 429 64 429 429 353 5.0% Convertible Senior Notes due 2029 (3) 6,692 6,692 67 6,692 6,692 3,480 5.0% Convertible Senior Notes due 2032 (4) 98,664 96,694 6,923 170,770 165,504 87,093 5.0% Convertible Exchange Senior Notes due 2032 26,849 42,625 26,649 — — — Total debt $ 451,462 $ 470,603 $ 92,147 $ 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 values of the notes were obtained by direct market quotes within Level 1 of the fair value hierarchy. The fair value of our Second Lien Notes and 2032 Exchange Notes were obtained using a discounted cash flow model within Level 3 of the fair value hierarchy. Level 1 and Level 3 of the fair value hierarchy are defined in this Item 8. (2) 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 8.0% Second Lien Notes. The debt discount as of December 31, 2015 was $11.0 million. (3) 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. (4) 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 $2.0 million and $ 5.3 million as of December 31, 2015 and December 31, 2014, respectively. The following table summarizes the total interest expense for the years ended (contractual interest expense, amortization of debt discount, accretion and financing costs) and the effective interest rate December 31, 2015 December 31, 2014 December 31, 2013 Interest Expense Effective Interest Rate Interest Expense Effective Interest Rate Interest Expense Effective Interest Rate Senior Credit Facility $ 4,308 5.1 % $ 3,943 5.2 % $ 3,936 5.3 % 8.0% Second Lien Senior Secured Notes due 2018 11,515 16.4 % — — — — 8.875% Second Lien Senior Secured Notes due 2018 2,333 * — — — — 8.875% Senior Notes due 2019 21,668 9.2 % 25,308 9.2 % 25,308 9.2 % 3.25% Convertible Senior Notes due 2026 13 3.3 % 14 3.3 % 14 3.3 % 5.0% Convertible Senior Notes due 2029 335 5.0 % 4,363 11.0 % 17,400 11.4 % 5.0% Convertible Senior Notes due 2032 12,495 8.6 % 14,201 8.7 % 4,529 8.8 % 5.0% Convertible Exchange Senior Notes due 2032 2,088 * — — — — Other 52 * — — — — Total $ 54,807 $ 47,829 $ 51,187 * - Not meaningful Deferred financing costs are amortized using the straight-line method through the contractual maturity dates for the Senior Credit Facility and 2019 Notes, through the first put date of September 1, 2017 for the 8.0% Second Lien Notes and through the first put date of October 1, 2017 for the 2032 Notes. Senior Credit Facility Total lender commitments under the Second Amended and Restated Credit Agreement (including all amendments, the “Senior Credit Facility”) are subject to a borrowing base limitation, which as of December 31, 2015 was $75 million. Our borrowing base was further reduced to $47 million on January 6, 2016. Total lender commitments were reduced to $40.3 million on March 29, 2016. 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 December 31, 2015, we had $27.0 million outstanding under the Senior Credit Facility. 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 8.0% 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 8.0% Second Lien Notes. On September 4, 2015, we closed on the sale of our Eagle Ford Shale Trend assets at which time the borrowing base was reduced to $105 million. In October 2015, we entered into the Fourteenth Amendment to the Senior Credit Facility (the “Fourteenth Amendment”) with an effective date of October 1, 2015. On the effective date, the Fourteenth Amendment reduced our borrowing base to $75 million in conjunction with the exchange of $158.2 million of our 2019 Notes for the issuance of $75.0 million of 8.875% Second Lien Notes due 2018. Our borrowing base was reduced to $47 million on January 6, 2016. 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 of our assets are pledged as collateral to secure the Senior Credit Facility. On October 1, 2015, the Company entered into the Fourteenth Amendment to the Senior Credit Facility. The Fourteenth Amendment includes the following key elements: (i) reduces the borrowing base to $75 million on October 1, 2015; (ii) permits the Company to refinance the 2019 Notes by issuing second lien or third lien debt (provided that the principal amount of third lien debt may not exceed $50 million); (iii) requires the Company to mortgage all of its oil and gas properties that constitute proved reserves; and (iv) authorizes the administrative agent under the Senior Credit Facility to enter into an amended and restated intercreditor agreement setting forth the priority of the liens securing the obligations under the Senior Credit Facility, the notes issued pursuant to the indentures of the Second Lien Notes and any third lien facility that the Company may enter into after the date hereof. On November 3, 2015, the Company entered into the Fifteenth Amendment to the Senior Credit Facility (the “Fifteenth Amendment”) with an effective date of November 3, 2015. The Fifteenth Amendment includes the following key elements: (i) affirms the borrowing base as $75 million, which constitutes the October 1 redetermination; (ii) requires the Company to mortgage all of its owned real property in the Eagle Ford Shale Trend, the Tuscaloosa Marine Shale Trend and the Hayesville Shale Trend; and (iii) authorizes the administrative agent under the Senior Credit Facility to enter into an amended and restated intercreditor agreement setting forth the priority of the liens securing the obligations under the Senior Credit Facility, the notes issued pursuant to the indentures of the Second Lien Notes and any third lien facility that the Company may enter into after the effective date. The Fifteenth Amendment also revised the Senior Credit Facility to include the following provisions and covenants: (i) no-hoarding provision of a maximum cash balance of $15 million at any time; (ii) no borrowed proceeds to make any payment on or redeem any capital or junior debt; (iii) restricts the ability to declare, pay or distribute dividends on our preferred capital stock consistent with the terms of the 8.0% Second Lien Notes and the 8.875% Second Lien Notes; and (iv) accelerated the next redetermination date to January 1, 2016 The terms of the Senior Credit Facility 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 under the Fifteenth Amendment to the Senior Credit Facility, included: · Current Ratio of 1.0/1.0; · Interest Coverage Ratio of EBITDAX to interest expense of not less than 1.25/1.0 for the trailing four quarters EBITDAX. The interest for such period to apply solely to the cash portion of interest expense; and · Maximum First Lien Debt no greater than 1.25 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. On March 29, 2016, the Company entered into the Sixteenth Amendment to the Senior Credit Facility (the “Sixteenth Amendment”). The Sixteenth Amendment includes the following key elements: (i) reduces total lender commitments to $40.3 million on March 29, 2016; (ii) the Company agrees not to request any borrowings, issue any new letters of credit or increase an existing letter of credit under the Senior Credit Facility before April 16, 2016; and (iii) requires that all letters of credit (except the letter of credit for the benefit of one specific vendor) expire at or prior to the earlier of (A) one year after the date of issuance or (B) five business days prior to February 24, 2017. The report of our independent registered public accounting firm that accompanies our audited consolidated financial statements for the year ended December 31, 2015 contains an explanatory paragraph regarding the substantial doubt about our ability to continue as a going concern. Per the terms of our agreement, we are in default under our Senior Credit Facility. As a result of the default, we are unable to make further draws on the Senior Credit Facility unless the default is waived by the lenders under our Senior Credit Facility. We are currently in discussions with the lenders under our Senior Credit Facility regarding a waiver of this requirement. If we do not obtain a waiver of this requirement within 15 days, an event of default will exist under the Senior Credit Facility and the lenders under the Senior Credit Facility will be able to accelerate the repayment of debt under the Senior Credit Facility. Any acceleration of our debt obligations would result in a foreclosure on the collateral securing the Senior Credit Facility. We elected to exercise our right to a grace period with respect to the interest payments that were due on March 15, 2016 on our 2019 Notes, 8.0% Second Lien Notes and 8.875% Second Lien Notes. Additionally, we have announced our intention to elect the right to a grace period with respect to interest payments due on, our 2029 Notes, our 2032 Notes and 2032 Exchange Notes. The interest payments are due on April 1, 2016. The grace periods permit us 30 days to make such interest payments before an event of default occurs under the indentures. Although, an event of default has not yet occurred, US GAAP requires us to classify all the related outstanding debt as a current liability. As a result, we are not in compliance with the Current Ratio covenant under the Senior Credit Facility as of December 31, 2015 As stated previously, without the restructuring of our current obligations under our existing outstanding debt and preferred stock instruments, we anticipate that we will violate the First Lien Debt to EBITDAX financial covenant ratio under the Senior Credit Facility at the end of the third quarter of 2016. We could request a waiver of this covenant violation; however, there is no assurance a waiver will be granted. If a waiver is not granted, we would be in default under the Senior Credit Facility and the lenders will be able to accelerate the repayment of debt under the Senior Credit Facility. Any acceleration of our debt obligations would result in a potential foreclosure on the collateral securing the Senior Credit Facility 8.0% Second Lien Senior Secured Notes due 2018 On March 12, 2015, we sold 100,000 units (the “Units”), each consisting of a $1,000 aggregate principal amount at maturity of our 8.0% Second Lien Senior Secured Notes due 2018 (the “8.0% Second Lien Notes”) and one warrant to purchase 48.84 shares of our $0.20 par value common stock. The 8.0% 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 8.0% Second Lien Notes were used to repay borrowings under the Senior Credit Facility and for general corporate purposes. The 8.0% Second Lien Notes are secured on a senior second-priority basis by liens on certain assets of the Company and its subsidiary that secures our Senior Credit Facility, which liens are subject to an inter-creditor agreement in favor of the lenders under the Senior Credit Facility. The 8.0% 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 8.0% Second Lien Notes shall be due on September 1, 2017. Interest on the 8.0% 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 8.0% 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 8.0% Second Lien Notes at a customary “make-whole” premium. The indenture governing the 8.0% 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 8.0% 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 8.0% Second Lien Notes) has occurred and is continuing, many of these covenants will terminate. The 8.0% Second Lien Notes and the warrants became separately transferable on June 4, 2015 when a registration statement related to the resale of the warrants was declared effective by the SEC. The warrants are 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 by March 12, 2025 will expire. In connection with the 8.0% Second Lien Notes, we entered into a registration rights agreement that provides holders of the 8.0% Second Lien Notes certain rights relating to registration of the 8.0% 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 SEC with respect to an offer to exchange the 8.0% Second Lien Notes for substantially identical notes that are registered under the Securities Act. We agreed to commence the exchange offer promptly after the exchange offer registration statement was 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 agreed to file a shelf registration statement with respect to the 8.0% Second Lien Notes. If the exchange offer was not completed on or before March 12, 2016, or the shelf registration statement, if required, was not declared effective within the time periods specified in the Registration Rights Agreement, we agreed to pay additional interest with respect to the 8.0% Second Lien Notes in an amount of 0.25% of the principal amount of the 8.0% 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. As of the date of this filing, neither an exchange offer nor shelf registration statement for the 8.0% Second Lien Notes had been filed with the SEC. We separately accounted for the liability and equity components of our 8.0% 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 8.0% Second Lien Notes using a discount rate of 32% on the date of issuance. We attributed $78.7 million of the 8.0% 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 8.0% Second Lien Notes. We have also identified an embedded derivative associated with the 8.0% Second Lien Notes stemming from the length of time between the maturity date of March 15, 2018 and the put date of September 1, 2017. We valued the embedded derivative at $5.9 million using the discounted cash flow method on the date of issuance. The fair value of the embedded derivative was $5.1 million as of December 31, 2015 and is included in the carrying amount of the 8.0% Second Lien Notes. The embedded derivative feature is recorded at fair value each reporting period. The debt discount is being amortized using the effective interest rate method through September 1, 2017 along with the applicable debt issuance costs. A debt discount of $11.0 million remains to be amortized on the 8.0% Second Lien Notes as of December 31, 2015. 8.875% Second Lien Senior Secured Notes due 2018 On October 1, 2015, we closed on a privately-negotiated exchange agreement under which we retired, in two tranches, $158.2 million in principal of our 8.875% Senior Notes due 2019 (the “2019 Notes”) for $75.0 million in principal of 8.875% Second Lien Notes due 2018 (the “8.875% Second Lien Notes”). The first tranche exchanged $81.7 million of 2019 Notes for $36.8 million of 8.875% Second Lien Notes. The second tranche exchanged $76.5 million of 2019 Notes for $38.2 million of 8.875% Second Lien Notes which also included the issuance of 38,250 warrants. Each warrant is entitled to purchase approximately 156.9 shares of our $0.20 par value common stock for $1.00 per share. The 8.875% Second Lien Notes are secured on a senior second-priority basis by liens on certain assets of the Company and its subsidiary that secures our Senior Credit Facility, which liens are subject to an inter-creditor agreement in favor of the lenders under the Senior Credit Facility. The new 8.875% Second Lien Notes have a maturity date of 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 8.875% Second Lien Notes shall be due on September 1, 2017. Interest on the 8.875% Second Lien Notes is payable semi-annually in arrears on March 15 and September 15 of each year, beginning on March 15, 2016. We may redeem all or a portion of the 8.875% 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 8.875% Second Lien Notes at a customary “make-whole” premium. The 8.875% Second Lien Notes contain a number of covenants including restrictions on (i) the incurrence of indebtedness similar to the restrictions in the Company’s 8.875% Senior Notes due 2019, (ii) the incurrence of liens including prior liens securing indebtedness in an amount in excess of the greater of $150 million and the borrowing base under Senior Credit Facility, equally ranking liens securing indebtedness in an amount (including the 8.875% Second Lien Notes) of more than $75 million, and junior liens securing indebtedness in an amount of more than $50 million, and (iii) restricted payments including the purchase or repayment of unsecured indebtedness prior to its scheduled maturity. The indenture governing contains customary events of default. If an event of default, as defined, occurs and is continuing, the trustee or the holders of at least 25% in aggregate principal amount of the 8.875% Second Lien Notes 8.875% Second Lien Notes The 8.875% Second Lien Notes We accounted for this transaction as a troubled debt transaction pursuant to guidance provided by FASB Accounting Standards Codification (“ASC”) section 470-60 “Troubled Debt Restructurings by Debtors.” We have determined that the prospective undiscounted cash flows from the 8.875% Second Lien Notes through their maturity did not exceed the adjusted carrying amount of the retired 2019 Notes, consequently a gain of $62.6 million was recognized for this exchange. Accordingly, on the date of the exchange, a carrying amount of $91.4 million was recorded as a liability and we recorded $2.5 million in Additional paid in capital representing the fair value of the warrants issued. On a basic and diluted loss per share basis the $62.6 million gain was $1.11 per share for the year ended December 31, 2015. 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. As described above, on October 1, 2015, we closed a privately-negotiated exchange under which we retired, in two tranches, $158.2 million in aggregate original principal amount of our outstanding 2019 Notes in exchange for the issuance of $75.0 million in aggregate original principal amount of our 8.875% Second Lien Notes and 38,250 warrants. Following this exchange, approximately $116.8 million aggregate original principal amount of the 2019 Notes remain outstanding with terms unchanged. We may redeem all or a portion of the 2019 Notes at redemption prices (expressed as percentages of principal amount) equal to approximately (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 On October 1, 2014, we repurchased $45.1 million of the 2029 Notes using the 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 per share). 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 5.0% 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: (i) 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; (ii) if the 2029 Notes have been called for redemption or (iii) 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, 2015. 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 We entered into separate, privately negotiated exchange agreements in 2013 under 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. On September 8, 2015, we closed a privately-negotiated exchange under which we retired $55.0 million in aggregate original principal amount of our outstanding 2032 Notes in exchange for our issuance of the 2032 Exchange Notes in an aggregate original principal amount of approximately $27.5 million. On October 14, 2015, we closed an additional privately-negotiated exchange under which we retired approximately $17.1 million in aggregate original principal amount of our outstanding 2032 Notes in exchange for our issuance of additional 2032 Exchange Notes in an aggregate original principal amount of approximately $8.5 million. 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 $3.0 million of accretion during 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 $2.0 million remains to be amortized on the 2032 Notes as of December 31, 2015. 5.0% Convertible Exchange Senior Notes due 2032 On September 8, 2015, we closed a privately-negotiated exchange under which we retired $55.0 million in principal amount of outstanding 2032 Notes in exchange for our issuance of approximately $27.5 million in aggregate original principal amount of 2032 Exchange Notes. On October 14, 2015, we closed an additional privately-negotiated exchange under which we retired approximately $17.1 million in aggregate original principal amount of our outstanding 2032 Notes in exchange for our issuance of additional 2032 Exchange Notes in an aggregate original principal amount of approximately $8.5 million. Investors may convert their 2032 Exchange 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) if the 2032 Exchange Notes have been called for redemption or the Company exercises its option to convert the 2032 Exchange Notes, or (2) upon the occurrence of one of specified corporate transactions. The conversion rate is 500.00 shares per $1,000 principal amount of the 2032 Exchange Notes (equal to an initial conversion price of $2.00 per share of common stock), subject to adjustment. If the holders elect to convert the 2032 Exchange Notes on or before October 1, 2018, holders will receive a make-whole premium equal to (i) $100 per $1,000 face amount of the 2032 Exchange Notes if the conversion occurs prior to October 1, 2017 or (ii) $100 per $1,000 face amount of the 2032 Exchange Notes less an amount equal to 0.2778 multiplied by the number of days between September 30, 2017 and the conversion date, if the conversion occurs on or after October 1, 2017. Like the 2032 Notes, the principal amount of the 2032 Exchange Notes will accrete at a rate of 2% per year from August 26, 2013, compounding on a semi-annual basis, until October 1, 2018. The accreted portion of the principal is payable in cash upon maturity but does not bear cash

Loss Per Common Share

Loss Per Common Share	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Loss Per Common Share	NOTE 5—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 years ended December 31, 2015, 2014 and 2013. Included in Net loss applicable to common stock for the year ended December 31, 2015 is $10.5 million of preferred stock dividends in arrears as a result of all cash dividends being suspended since the third quarter of 2015 to conserve capital. The preferred stock dividend in arrears amount is included in the 2015 Net loss applicable to common stock calculation for period-to-period comparison purposes only. The following table sets forth information related to the computations of basic and diluted loss per share. Year Ended December 31, 2015 2014 2013 (Amounts in thousands, except per share data) Basic and Diluted loss per share: Net loss applicable to common stock $ (409,880 ) $ (382,858 ) $ (113,790 ) Weighted-average shares of common stock outstanding 56,315 44,402 38,098 Basic and Diluted loss per share (1) (2) (3) $ (7.28 ) $ (8.62 ) $ (2.99 ) (1) Common shares issuable upon assumed conversion of convertible preferred stock or dividends paid were not presented as they would have been anti-dilutive. 20,145 3,588 3,588 (2) Common shares issuable upon assumed conversion of the 2026 Notes, 2029 Notes, 2032 Notes and 2032 Exchange Notes or interest paid were not presented as they would have been anti-dilutive. 15,728 4,997 6,307 (3) Common shares issuable on assumed conversion of restricted stock, stock warrants and employee stock options were not included in the computation of diluted loss per common share since their inclusion would have been anti-dilutive. 14,081 2,631 2,436

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 6—Income Taxes We did not recognize any current or deferred income tax benefits or expense in 2015, 2014 or 2013. The following is a reconciliation of the U.S. statutory income tax rate at 35% to our loss before income taxes (in thousands): Year Ended December 31, 2015 2014 2013 Income tax (expense) benefit Tax at U.S. statutory income tax $ 167,799 $ 123,597 $ 33,315 Valuation allowance (185,698 ) (122,032 ) (30,967 ) State income taxes-net of federal benefit 22,110 2,484 (902 ) Nondeductible expenses and other (4,211 ) (4,049 ) (1,446 ) Total tax (expense) benefit $ — $ — $ — The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities are presented below (in thousands): December 31, 2015 2014 Current deferred tax assets: Derivative financial instruments $ 10 $ — Contingent liabilities and other 130 366 Compensation — 1,307 Less: valuation allowance (140 ) (1,566 ) Total current deferred tax assets — 107 Current deferred tax liabilities: Derivative financial instruments — (16,569 ) Accrued liabilities (26 ) (26 ) Total current deferred tax liabilities (26 ) (16,595 ) Net current deferred tax liability $ (26 ) $ (16,488 ) Noncurrent deferred tax assets: Operating loss carry-forwards $ 286,441 $ 256,240 State Tax NOL and Credits 12,383 7,974 Statutory depletion carry-forward 7,035 7,035 AMT tax credit carry-forward 1,052 1,114 Compensation 3,040 3,105 Contingent liabilities and other 523 522 Derivative financial instruments — 162 Debt discount 17,652 — Property and equipment 172,313 82,990 Total gross noncurrent deferred tax assets 500,439 359,142 Less valuation allowance (500,308 ) (336,841 ) Net noncurrent deferred tax assets 131 22,301 Noncurrent deferred tax liabilities: Bond discount (105 ) (89 ) Debt discount — (5,724 ) Total non-current deferred tax liabilities (105 ) (5,813 ) Net non-current deferred tax asset $ 26 $ 16,488 The valuation allowance for deferred tax assets increased by $162.0 million in 2015. In determining the carrying value of a deferred tax asset, accounting standards provide for the weighing of evidence in estimating whether and how much of a deferred tax asset may be recoverable. As we have incurred net operating losses in 2015 and prior years, relevant accounting guidance suggests that cumulative losses in recent years constitute significant negative evidence, and that future expectations about income are insufficient to overcome a history of such losses. Therefore, with the before-mentioned adjustment of $162.0 million, we have reduced the carrying value of our net deferred tax asset to zero. The valuation allowance has no impact on our net operating loss (“NOL”) position for tax purposes, and if we generate taxable income in future periods, we will be able to use our NOLs to offset taxes due at that time. We will continue to assess the valuation allowance against deferred tax assets considering all available evidence obtained in future reporting periods. As of December 31, 2015, we have federal NOL carry-forwards of approximately $824.6 million for tax purposes which begin to expire in 2026. We also have an alternative minimum tax credit carry-forward not subject to expiration of $1.1 million which will not be used until after the available NOLs have been used or expired and when regular tax exceeds the current year alternative minimum tax. We did not have any unrecognized tax benefits as of December 31, 2015. The amount of unrecognized tax benefits may change in the next twelve months; however we do not expect the change to have a significant impact on our results of operations or our financial position. We file a consolidated federal income tax return in the United States and various combined and separate filings in several state and local jurisdictions. With limited exceptions, we are no longer subject to U.S. Federal, state and local, or non-U.S. income tax examinations by tax authorities for years before 2006. Our continuing practice is to recognize estimated interest and penalties related to potential underpayment on any unrecognized tax benefits as a component of income tax expense in the Consolidated Statement of Operations. We do not anticipate that total unrecognized tax benefits will significantly change due to the settlement of audits and the expiration of statute of limitations before December 31, 2016.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Stockholders' Equity	NOTE 7—Stockholders’ Equity 5.375% Series B Cumulative Convertible Preferred Stock During 2005 and 2006 we issued a total of 2,250,000 shares of our Series B Preferred Stock. Each share of the Series B Preferred Stock has a liquidation preference of $50 per share, aggregating to $82.5 million, and bears a dividend of 5.375% per annum. Dividends are payable quarterly in arrears beginning March 15, 2006. If we fail to pay dividends on our Series B Preferred Stock on any six dividend payment dates, whether or not consecutive, the dividend rate per annum will be increased by 1.0% until we have paid all dividends on our Series B Preferred Stock for all dividend periods up to and including the dividend payment date on which the accumulated and unpaid dividends are paid in full. On December 18, 2015, holders of the Series B Preferred Stock exchanged 758,434 shares of Series B Preferred Stock for 910,112 depositary shares of our new Series E Preferred Stock in conjunction with a tender offer. Holders that participated in the Series E Preferred Stock exchange forfeited any claim to all dividends in arrears and any unpaid dividends through the settlement date of the exchange tender offer. We suspended payment of dividends in the third quarter of 2015 consequently, as of December 31, 2015 there were $2.0 million of Series B Preferred Stock dividends in arrears. Each share is convertible at the option of the holder into our common stock at any time at an initial conversion rate of 1.5946 shares of common stock per share, which is equivalent to an initial conversion price of approximately $31.36 per share of common stock. Upon conversion of the Series B Preferred Stock, we may choose to deliver the conversion value to holders in cash, shares of common stock, or a combination of cash and shares of common stock. If a fundamental change occurs, holders may require us in specified circumstances to repurchase all or part of the Series B Convertible Preferred Stock. In addition, upon the occurrence of a fundamental change or specified corporate events, we will under certain circumstances increase the conversion rate by a number of additional shares of common stock. A “fundamental change” will be deemed to have occurred if any of the following occurs: · We consolidate or merge with or into any person or convey, transfer, sell or otherwise dispose of or lease all or substantially all of our assets to any person, or any person consolidates with or merges into us or with us, in any such event pursuant to a transaction in which our outstanding voting shares are changed into or exchanged for cash, securities, or other property; or · We are liquidated or dissolved or adopt a plan of liquidation or dissolution. A “fundamental change” will not be deemed to have occurred if at least 90% of the consideration in the case of a merger or consolidation under the first clause above consists of common stock traded on a U.S. national securities exchange and the Series B Preferred Stock becomes convertible solely into such common stock. As of December 21, 2010, we have the option to cause the Series B Preferred Stock to be automatically converted into the number of shares of common stock that are issuable at the then-prevailing conversion rate, pursuant to the Company Conversion Option. We may exercise our conversion right only if, for 20 trading days within any period of 30 consecutive trading days ending on the trading day before the announcement of our exercise of the option, the closing price of the common stock equals or exceeds 130% of the then-prevailing conversion price of the Series B Preferred Stock. The Series B Preferred Stock is non-redeemable by us. There have been no redemptions or conversions in any periods. 10% Series C Cumulative Preferred Stock In April 2013, we issued $110 million of Series C Preferred Stock and received $105.4 million net proceeds from the sale. The sale consisted of 4,400,000 depositary shares each representing a 1/1000th ownership interest in a share of Series C Preferred Stock, par value $1.00 per preferred share with a liquidation preference of $25,000 per preferred share ($25.00 per depositary share) in an underwritten public offering. On December 18, 2015, holders of the Series C Preferred Stock exchanged 1,274,932 depositary shares of Series C Preferred Stock for 1,274,932 depositary shares of our new Series E Preferred Stock in conjunction with a tender offer. Holders that participated in the Series E Preferred Stock exchange forfeited any claim to all dividends in arrears and any unpaid dividends through the settlement date of the exchange tender offer. As of December 31, 2015 there were $3.9 million of Series C Preferred Stock dividends in arrears. The Series C Preferred Stock ranks senior to our common stock and on parity with our 5.375% Series B Cumulative Convertible Preferred Stock and our 9.75% Series D Cumulative Preferred Stock with respect to the payment of dividends and distribution of assets upon liquidation, dissolution or winding up. The Series C Preferred Stock has no stated maturity and is not subject to mandatory redemption or any sinking fund and will remain outstanding indefinitely unless repurchased or redeemed by us or converted into our common stock in connection with certain changes of control. At any time on or after April 10, 2018, we may, at our option, redeem the Series C Preferred Stock, in whole at any time or in part from time to time, for cash at a redemption price of $25,000 per preferred share, plus all accumulated and unpaid dividends to, but not including, the date of redemption. We may redeem the Series C Preferred Stock following certain changes of control, if we do not exercise this option, then the holders of the Series C Preferred Stock have the option to convert the shares of preferred stock into a maximum of 3,371.54 shares of our common stock per share of Series C Preferred Stock, subject to certain adjustments. If we exercise any of our redemption rights relating to shares of Series C Preferred Stock, the holders of Series C Preferred Stock will not have the conversion right described above with respect to the shares of Series C Preferred Stock called for redemption. Holders of the Series C Preferred Stock have no voting rights except for limited voting rights if we fail to pay dividends for six or more quarterly periods (whether or not consecutive) and in certain other limited circumstances or as required by law. 9.75% Series D Cumulative Preferred Stock In August 2013, we issued $130 million of Series D Preferred Stock and received $124.9 million net proceeds from the sale. The sale consisted of 5,200,000 depositary shares each representing a 1/1000th ownership interest in a share of Series D Preferred Stock, par value $1.00 per preferred share with a liquidation preference of $25,000 per preferred share ($25.00 per depositary share) in an underwritten public offering. On December 18, 2015, holders of the Series D Preferred Stock exchanged 1,463,759 depositary shares of Series D Preferred Stock for 1,463,759 depositary shares of our new Series E Preferred Stock in conjunction with a tender offer. Holders that participated in the Series E Preferred Stock exchange forfeited any claim to all dividends in arrears and any unpaid dividends through the settlement date of the exchange tender offer. As of December 31, 2015 there were $4.6 million of Series D Preferred Stock dividends in arrears. The Series D Preferred Stock ranks senior to our common stock and on parity with our Series B Preferred Stock and our Series C Preferred Stock with respect to the payment of dividends and distribution of assets upon liquidation, dissolution or winding up. The Series D Preferred Stock has no stated maturity and is not subject to mandatory redemption or any sinking fund and will remain outstanding indefinitely unless repurchased or redeemed by us or converted into our common stock in connection with certain changes of control. At any time on or after August 19, 2018, we may, at our option, redeem the Series D Preferred Stock, in whole at any time or in part from time to time, for cash at a redemption price of $25,000 per preferred share, plus all accumulated and unpaid dividends to, but not including, the date of redemption. We may redeem the Series D Preferred Stock following certain changes of control, if we do not exercise this option, then the holders of the Series D Preferred Stock have the option to convert the shares of preferred stock into a maximum of 2,297.79 shares of our common stock per share of Series D Preferred Stock, subject to certain adjustments. If we exercise any of our redemption rights relating to shares of Series D Preferred Stock, the holders of Series D Preferred Stock will not have the conversion right described above with respect to the shares of Series D Preferred Stock called for redemption. Holders of the Series D Preferred Stock have no voting rights except for limited voting rights if we fail to pay dividends for six or more quarterly periods (whether or not consecutive) and in certain other limited circumstances or as required by law. 10% Series E Cumulative Convertible Preferred Stock In conjunction with a tender offer that settled on December 18, 2015 we issued 3,648,803 depositary shares of Series E Preferred Stock in exchange for 758,434 shares of Series B Preferred Stock, 1,274,932 depositary shares of Series C Preferred Stock and 1,463,759 depositary shares of Series D Preferred Stock. The Series E Preferred Stock ranks senior to our common stock and on parity with our Series B Preferred Stock, our Series C Preferred Stock and our Series D Preferred Stock with respect to the payment of dividends and distribution of assets upon liquidation, dissolution or winding up. The Series E Preferred Stock has no stated maturity and is not subject to mandatory redemption or any sinking fund and will remain outstanding indefinitely unless repurchased or redeemed by us or converted into our common stock in connection with certain changes of control. The Series E Preferred Stock is convertible into shares of our $0.20 per share par value common stock at any time during the life of the security. The conversion rate will initially be 5.00 shares of common stock per depositary share of Series E Preferred Stock, which is equivalent to a conversion price of approximately $2.00 per share of common stock. Upon conversion of the Series E Preferred Stock, we may choose to deliver the conversion value to holders in cash, shares of our common stock, or a combination of cash and shares of our common stock. Holders of shares of our Series E Preferred Stock are entitled to receive, when and if declared by our board of directors out of funds legally available for payment, cumulative dividends at the rate per annum of 10.00% per share on the liquidation preference thereof of $10.00 per share of our Series E Preferred Stock (equivalent to $1.00 per annum per share). Dividends on our Series E Preferred Stock are payable quarterly on March 15, June 15, September 15 and December 15 of each year, beginning on March 15, 2016, at such annual rate, and shall accumulate from the most recent date as to which dividends shall have been paid whether or not in any dividend period or periods there have been funds legally available for the payment of such dividends. Accumulations of dividends on shares of our Series E Preferred Stock will not bear interest. Dividends on the Series E Preferred Stock may be paid in cash, by delivery of shares of common stock, or through any combination of cash and common stock. If we elect to make any such payment, or any portion thereof, in shares of common stock, such shares shall be valued for such purpose, in the case of any dividend payment, at 95% of the market value as determined on the second trading day immediately prior to the record date for such dividend; provided that in no event shall such shares be valued less than $0.70 per share for such purpose. We may not redeem the Series E Preferred Stock prior to April 10, 2018. At any time or from time to time on or after April 10, 2018 we may, at our option, redeem the Series E Preferred Stock, in whole or in part, upon not less than 30 nor more than 60 days notice, out of funds legally available therefore, at a redemption price equal to the $10.00 liquidation preference per share of the Series E Preferred Stock plus an amount equal to accumulated and unpaid dividends (whether or not declared), if any. On or after the date of issuance, we may, at our option, cause the Series E Preferred Stock to be automatically converted into that number of shares of common stock that are issuable at the then-prevailing conversion rate. We may exercise our option to automatically convert the Series E Preferred Stock only if the closing price of our common stock equals or exceeds 150% of the then prevailing conversion price of the Series E Preferred Stock for at least twenty trading days in a period of thirty consecutive trading days. In addition, if there are fewer than 50,000 shares of Series E Preferred Stock outstanding, we may, at any time, at our option, cause the Series E Preferred Stock to be automatically converted into that number of shares of common stock equal to $10.00 (the liquidation preference per share of Series E Preferred Stock) divided by the lesser of the then prevailing conversion price and the market value of our common stock for the five (5) trading day period ending on the second trading day immediately prior to the date we exercise our option to cause the Series E Preferred Stock to be automatically converted. We may choose to deliver the conversion value in connection with a conversion to investors in cash, shares of common stock, or a combination of cash and common stock. We accounted for the Series E Preferred Stock exchange as an extinguishment transaction pursuant to SEC guidance codified provided by FASB Accounting Standards Codification (“ASC”) in section 260-10-S99-02. SEC guidance indicates when a preferred stock extinguishment has occurred the difference between the fair value of the consideration transferred to the holders of the preferred stock and the carrying amount of that preferred stock on the balance sheet should be subtracted from or added to net income to arrive at income available to common stockholders in the calculation of earnings per share. Accordingly, we recognized a $95.8 million return of dividend that was added to net loss to arrive at net loss available to common stock. Preferred Stock Dividends Beginning in the third quarter of 2015 all preferred stock dividend declarations and payments have been suspended. We are not in a position to declare or issue any dividends due to a lack of surplus as defined under Delaware state law. If we fail to pay dividends on our Series B Preferred Stock on any six dividend payment dates, whether or not consecutive, the dividend rate per annum will be increased by 1.0% until we have paid all dividends on our Series B Preferred Stock for all dividend periods up to and including the dividend payment date on which the accumulated and unpaid dividends are paid in full. If we fail to pay dividends for six or more quarterly periods, whether or not consecutive, on our Series C Preferred Stock or Series D Preferred Stock the holders will receive limited voting rights. The following table sets forth information related to the components of Preferred stock, net on our Consolidated Statements of Operations: Year Ended December 31, 2015 2014 2013 (Amounts in thousands) Preferred stock, net: Preferred stock dividends $ 14,861 $ 29,722 $ 18,604 Preferred stock dividends in arrears 10,464 — — Preferred stock exchange (94,869 ) — — $ (69,544 ) $ 29,722 $ 18,604 We reported dividends of $81.2 million on our Consolidated Statements of Stockholders’ Equity (Deficit) for the year ended December 31, 2015, while we reported net preferred stock activity of $69.5 million on our Consolidated Statement of Operations for the year ended December 31, 2015. The difference between the two reported amounts is $10.5 million of preferred stock dividends in arrears and a $1.2 million dividend payment timing difference. 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 $47.5 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 8.0% 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 $0.20 par value common stock. The warrants were issued pursuant to a Warrant Agreement, dated March 12, 2015 (the “Warrant Agreement”), with American Stock Transfer & Trust Company LLC. Under the terms of the Warrant Agreement, the Second Lien Notes and the warrants were not separately transferable until the earliest of (i) 365 days after the date on which the warrants were originally issued; (ii) the date on which a registration statement related to the resale of the warrants was declared effective; (iii) the date on which a registration statement with respect to a registered exchange offer for the Second Lien Notes was declared effective; or (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 was mailed to the holders of Second Lien Notes. 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 were obligated to file a shelf registration statement with the SEC within 90 days of March 12, 2015, relating to re-sales of the Warrants. A Form S-3 was filed with the SEC on May 22, 2015 to register the resale of the warrants and the common stock issuable upon the conversion of such warrants. The Second Lien Notes and warrants became separately transferable on June 4, 2015 when the Form S-3 registration statement related to the resale of the warrants was declared effective by the SEC. The warrants are 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 by March 12, 2025 will expire. Upon issuance, we valued the warrants as a separate financial instrument using the Black-Scholes model and recorded the $15.4 million relative fair value to Additional paid in capital on the Consolidated Balance Sheets. On October 1, 2015, in connection with the issuance of the 8.875% Second Lien Notes we issued 38,250 warrants. Each warrant is entitled to purchase approximately 156.9 shares of our $0.20 par value common stock for $1.00 per share. As previously stated, the warrants will not be separately transferable until the earlier of (i) 60 days after the date on which the Warrants are originally issued or (ii) in the event of the occurrence of a change of control, as defined in the governing indenture. At such time, the warrants will become convertible on a cashless basis as set forth in the warrant agreement. Any warrants not exercised in ten years from the date of issuance will expire. These warrants are not subject to a registration rights agreement. Conversions to Common Stock In 2015, we issued 5.2 million shares of our common stock to holders that exercised their conversion rights on $10.4 million face amount of the 2032 Exchange Notes. We recorded the $17.1 million carrying amount of the converted 2032 Exchange Notes to stockholders equity. See Note 4. In December 2015, we issued 476,800 shares of our common stock to Series E Preferred Stock holders that exercised their conversion rights on approximately 95,000 depositary shares of Series E Preferred Stock.

Derivative Activities

Derivative Activities	12 Months Ended
	Dec. 31, 2015
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Activities	NOTE 8—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 during 2015, 2014 and 2013 are from our oil and natural gas derivative contracts and have been recognized in “Other income (expense)” on our Consolidated Statements of Operations. Our last interest rate derivative contract ended in 2010. See Note 4 for further discussion of the embedded derivative associated with the 8.0% Second Lien Notes. The following table summarizes the gains and losses we recognized on our oil and natural gas derivatives for the years ended December 31, 2015, 2014 and 2013. December 31, Oil and Natural Gas Derivatives (in thousands) 2015 2014 2013 Gain (loss) on derivatives not designated as hedges $ 7,367 $ 49,423 $ (702 ) 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 derivative contracts are approved by the Hedging Committee of our Board of Directors, and reviewed periodically by the Board of Directors. As of December 31, 2015, the commodity derivatives we used were in the form of: · 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. Domestic crude oil and natural gas 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 would not have been at risk of losing any fair value amounts had our counterparties as a group been unable to fulfill their obligations as of December 31, 2015 since we did not have a derivative asset on our Consolidated Balance sheets as of December 31, 2015. As of December 31, 2015, our open positions on our outstanding commodity derivative contracts, all of which were with JPMorgan Chase Bank, N.A. and Wells Fargo Bank, N.A., were as follows: Contract Type Daily Volume Total Volume Fixed Price Fair Value at December 31, 2015 (in thousands) Natural gas calls (MMBtu) 2016 20,000 7,320,000 $ 5.05-5.06 $ (30 ) $ (30 ) The following table summarizes the fair values of our derivative financial instruments that are recorded at fair value classified in each level as of December 31, 2015 and 2014 (in thousands). We measure the fair value of our commodity derivative contracts by applying the income approach. See Note 1 “Fair Value Measurement” for our discussion for inputs used and valuation techniques for determining fair values. 2015 Fair Value Measurements Using Description Level 1 Level 2 Level 3 Total Current Assets Commodity Derivatives $ — $ — $ — $ — Non-current Assets Commodity Derivatives — — — — Current Liabilities Commodity Derivatives — (30 ) — (30 ) Non-current Liabilities Commodity Derivatives — — — — Total $ — $ (30 ) $ — $ (30 ) 2014 Fair Value Measurements Using Description Level 1 Level 2 Level 3 Total Current Assets Commodity Derivatives $ — $ 47,444 $ — $ 47,444 Non-current Assets Commodity Derivatives — — — — Current Liabilities Commodity Derivatives — (102 ) — (102 ) Non-current Liabilities Commodity Derivatives — (464 ) — (464 ) Total $ — $ 46,878 $ — $ 46,878 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 Statements of Financial Position for the periods ending December 31, 2015 and December 31, 2014. December 31, 2015 December 31, 2014 Fair Value of Oil and Natural Gas Derivatives (in thousands) Gross Amount Amount Offset As Presented Gross Amount Amount Offset As Presented Derivative Current Asset $ — $ — $ — $ 47,444 $ — $ 47,444 Derivative Non-current Asset — — — — — — Derivative Current Liability (30 ) — (30 ) (102 ) — (102 ) Derivative Non-current Liability — — — (464 ) — (464 ) Total $ (30 ) $ — $ (30 ) $ 46,878 $ — $ 46,878

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2015
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 9—Commitments and Contingencies We are party to various lawsuits from time to time arising in the normal course of business, including, but not limited to, royalty, contract, personal injury, and environmental claims. We have established reserves as appropriate for all such proceedings and intend to vigorously defend these actions. Management believes, based on currently available information, that adverse results or judgments from such actions, if any, will not be material to our consolidated financial position results of operations or liquidity. The table below provides estimates of the timing of future payments that we are obligated to make based on agreements in place at December 31, 2015 (in thousands). Payment due by Period Note Total 2016 2017 2018 2019 2020 and After Debt (1) 4 $ 429,468 $ 429,468 $ — $ — $ — $ — Interest on notes 4 76,725 31,363 30,941 11,984 2,437 — Office space leases 5,449 1,381 1,430 1,479 1,159 — Office equipment leases 194 117 77 — — — Operations contracts 8,193 8,174 19 — — — Transportation contracts 1,000 1,000 — — — — Total contractual obligations (2) $ 521,029 $ 471,503 $ 32,467 $ 13,463 $ 3,596 $ — (1) As stated previously, all debt outstanding as of December 31, 2015 has been classified as a current liability. For additional information see Note 4—Debt. (2) This table does not include the estimated liability for dismantlement, abandonment and restoration costs of oil and natural gas properties of $3.7 million as of December 31, 2015. We record a separate liability for the asset retirement obligations. See Note 3. Operating Leases —We have commitments under an operating lease agreements for office space and office equipment leases. Total rent expense for the years ended December 31, 2015, 2014 and 2013, was approximately $1.5 million, $1.4 million and $1.3 million, respectively. Pipe Contracts — On June 10, 2015, we entered into an eighteen month term agreement with a third party vendor which obligated us to purchase $11.4 million in pipe. We will receive and pay for approximately $0.6 million of pipe each month during the term of the agreement. Our obligation may be reduced subject to the vendor identifying an opportunity to sell the pipe to the open market. We have taken delivery of seven shipments under this agreement and an $6.8 million commitment remained at December 31, 2015. Defined Contribution Plan – We have a defined contribution plan (“DCP”) which matches a portion of employees’ contributions. Participation in the DCP is voluntary and all regular employees of the Company are eligible to participate. We charged to expense plan contributions of $0.5 million $0.6 million and $0.7 million for 2015, 2014 and 2013, respectively. Transportation Contracts - We have commitments under a transportation contract for our Eagle Ford Shale Trend properties. See Note 1 “-Transportation Obligation” for further information.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2015
Related Party Transactions [Abstract]
Related Party Transactions	NOTE 10—Related Party Transactions Patrick E. Malloy, III, resigned as Chairman of the Board of Directors of our Company in May 2015. Mr. Malloy is a principal of Malloy Energy Company, LLC (“MEC”). MEC owns various small working interests in the Bethany Longstreet field for which we are the operator. In accordance with industry standard joint operating agreements, we bill MEC for its share of capital and operating cost on a monthly basis. As of December 31, 2014, the amounts billed and outstanding to MEC for its share of monthly capital and operating costs was less than $0.1 million and was included in trade and other accounts receivable on the consolidated balance sheets. Such amounts at each year-end were paid by MEC to us in the month after billing and is current on payment of its billings. Billings during 2015 through the date of Mr. Malloy resignation from the Board of Directors and for the year ended December 31, 2014 were $0.3 million and $0.4 million, respectively. Revenue distributions for the same periods totaled $0.1 million and $0.5 million, respectively. We also serve as the operator for a number of other oil and natural gas wells owned by affiliates of MEC in which we will earn a working interest after payout. In accordance with industry standard joint operating agreements, we bill the affiliates for its share of the capital and operating costs of these wells on a monthly basis. As of December 31, 2014, the amounts billed and outstanding to the affiliate for its share of monthly capital and operating costs was less than $0.3 million and was included in trade and other accounts receivable on the consolidated balance sheets. Such amounts at each year-end were paid by the affiliate to us in the month after billing and the affiliate is current on payment of its billings. Billings, during 2015 through the date of Mr. Malloy resignation from the Board of Directors and for the year ended December 31, 2014, to these affiliates, totaled $0.2 million and $1.2 million, respectively. Revenue distributions during the same periods totaled $0.2 million and $1.2 million, respectively.

Dispositions and Acquisitions

Dispositions and Acquisitions	12 Months Ended
	Dec. 31, 2015
Business Combinations [Abstract]
Dispositions and Acquisitions	Note 11 – Dispositions and Acquisitions On September 4, 2015 we closed the sale of our proved reserves and a portion of the associated leasehold in the Eagle Ford Shale Trend located in La Salle and Frio counties in Texas for $118.0 million. We received net proceeds of $110.0 million after closing adjustments based upon an effective date of July 1, 2015. We used the net proceeds from the sale to repay borrowings under our Senior Credit Facility. We recorded a $49.7 million gain on the sale in 2015.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Note 12 – Subsequent Events Exchange Offers On January 26, 2016 we commenced the “Exchange Offers” . The Exchange Offers, are designed to reduce or eliminate the principal amount of our Existing Unsecured Notes and liquidation preference on our Existing Preferred Stock, reduce cash interest expense through the exchange of the Existing Unsecured Notes into common stock, enable us to defer interest on the Second Lien Notes by issuing additional notes in lieu of cash interest and eliminate our dividend obligations for the Existing Preferred Stock. We are conducting the Exchange Offers in response to the current low commodity price environment that has had a significant, adverse impact on the Company. Our ability to make the March 2016 interest payments on our 8.0% Second Lien Notes, 8.875% Second Lien Notes and 2019 Notes and service other debt and fund operations is at significant risk as a result of the sustained low commodity prices and raises substantial doubt about our ability to continue as a going concern. If we are unable to complete the Exchange Offers, and address near-term liquidity needs, we may need to seek relief under the U.S. Bankruptcy Code. This relief may include: (i) seeking bankruptcy court approval for the sale or sales of some, most or substantially all of the Company’s assets pursuant to section 363(b) of the U.S. Bankruptcy Code and a subsequent liquidation of the remaining assets in the bankruptcy case; (ii) pursuing a plan of reorganization (where votes for the plan may be solicited from certain classes of creditors prior to a bankruptcy filing) that the Company would seek to confirm (or “cram down”) despite any classes of creditors who reject or are deemed to have rejected such plan; or (iii) seeking another form of bankruptcy relief, all of which involve uncertainties, potential delays and litigation risks. See Note 1 “—Recapitalization Plan” for further information. Special Meeting of Shareholders On March 31, 2016, we will hold a special meeting of our stockholders to approve (i) an amendment to our Restated Certificate of Incorporation increasing the number of authorized shares of our Common Stock to 400 million (the “Authorized Share Amendment Proposal”) to allow for the issuance of common stock in the various Exchange Offers in connection with the Recapitalization Plan and (ii) amendments to the Certificate of Designation of each of series of Existing Preferred Stock that would, if approved, allow us to mandatorily convert such series of Existing Preferred Stock into common stock at the rate offered in the applicable Preferred Exchange Offer (each, a “Preferred Stock Amendment Proposal”). Exercise of Right to Grace Period On March 15, 2016, the Company elected to exercise its right to a grace period with respect to a $5.2 million interest payment due on its 2019 Notes, issued pursuant to the Indenture dated as of March 2, 2011, between the Company, Goodrich Petroleum Company, L.L.C., as subsidiary guarantor, and Wells Fargo Bank, National Association, as trustee (the “2019 Senior Notes Indenture”), a $4.0 million interest payment due on its 8.0% Second Lien Notes, issued pursuant to the Indenture dated as of March 12, 2015, between the Company, Goodrich Petroleum Company, L.L.C., as subsidiary guarantor, and U.S. Bank National Association, as trustee and collateral trustee (the “8.0% Second Lien Indenture”), and a $3.3 million interest payment due on its 8.875% Second Lien Notes, issued pursuant to the Indenture, dated as of October 1, 2015, between the Company, Goodrich Petroleum Company, L.L.C., as subsidiary guarantor, and U.S. Bank National Association, as trustee and collateral trustee (the “8.875% Second Lien Indenture” and, together with the 2019 Senior Notes Indenture and the 8.0% Second Lien Notes Indenture, the “Indentures”). The interest payments were due on March 15, 2016; however, such grace period permits the Company 30 days to make such interest payments before an event of default occurs under the Indentures. The Company believes it is in the best interests of its stakeholders to actively address the Company’s debt and capital structure and is continuing discussions with its creditors and their respective professionals. The Company is continuing to pay suppliers and other trade creditors in the ordinary course of business.

Summarized Quarterly Financial

Summarized Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Summarized Quarterly Financial Data (Unaudited)	Summarized Quarterly Financial Data (Unaudited) (In Thousands, Except Per Share Amounts) First Quarter Second Quarter Third Quarter Fourth Quarter Total 2015 Revenues $ 24,030 $ 26,101 $ 17,729 $ 9,790 $ 77,650 Operating income (loss) (13,469 ) (10,879 ) (10,095 ) (460,096 ) (494,539 ) Net income (loss) (21,118 ) (31,638 ) (17,796 ) (408,872 ) (479,424 ) Net income (loss) applicable to common stock (28,549 ) (39,068 ) (25,226 ) (317,037 ) (409,880 ) Basic income (loss) per common share (0.58 ) (0.68 ) (0.44 ) (5.19 ) (7.28 ) Diluted income (loss) per common share (0.58 ) (0.68 ) (0.44 ) (5.19 ) (7.28 ) 2014 Revenues $ 51,803 $ 53,319 $ 54,874 $ 48,557 $ 208,553 Operating income (loss) (2,123 ) (3,552 ) (87,420 ) (261,725 ) (354,820 ) Net income (loss) (22,492 ) (25,106 ) (79,711 ) (225,827 ) (353,136 ) Net income (loss) applicable to common stock (29,923 ) (32,536 ) (87,142 ) (233,257 ) (382,858 ) Basic income (loss) per common share (0.68 ) (0.73 ) (1.96 ) (5.23 ) (8.62 ) Diluted income (loss) per common share (0.68 ) (0.73 ) (1.96 ) (5.23 ) (8.62 )

Description of Business, Mana20

Description of Business, Management Plan and Accounting Policies (Policies)	12 Months Ended
	Dec. 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 significant and sustained 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 2015 and 2016 to mitigate the effects of lower crude oil prices on our operations and conserve capital: 1 . Reduced our capital expenditures for 2015 as compared to 2014. 2 . Extended the maturity of our Senior Credit Facility to February 24, 2017. 3 . Received proceeds of $100 million from the issuance of 8.0% Second Lien Senior Secured Notes due 2018 (the “8.0% Second Lien Notes”). 4 . Received net proceeds of $47.5 million from the sale of 12,000,000 shares of our common stock to the public. 5 . Reduced staff headcount by more than 50% from year-end 2014 levels thereby reducing expenses. 6 . Closed the sale of proved reserves and a portion of the associated leasehold in the Eagle Ford Shale Trend in September 2015 for proceeds of $110.0 million. The proceeds were used to pay off borrowings under the Senior Credit Facility. 7 . Exchanged an aggregate of $72.1 million of our 5.0% Senior Convertible Notes due 2032 (the “2032 Notes”) for $36.0 million of new 5.0% Convertible Exchange Senior Notes due 2032 (the “2032 Exchange Notes”) 8 . Exchanged $158.2 million of our 8.875% Senior Notes due 2019 (the “2019 Notes”) for $75.0 million of 8.875% Second Lien Notes due 2018 (the “8.875% Second Lien Notes” and, together with the 8.0% Second Lien Notes, the “Second Lien Notes”) 9. Suspended all preferred stock dividend payments beginning in the third quarter of 2015 due to a lack of surplus as defined under Delaware state law and to conserve capital. 10 . We retired 758,434 shares of our 5.375% Series B Cumulative Convertible Preferred Stock (the “Series B Preferred Stock”), 1,274,932 depositary shares of our 10% Series C Cumulative Preferred Stock (the “Series C Preferred Stock”) and 1,463,759 depositary shares of our 9.75% Series D Cumulative Preferred Stock (the “Series D Preferred Stock”) for 3,648,803 depositary shares of our newly issued 10% Series E Cumulative Convertible Preferred Stock (the “Series E Preferred Stock”). The 10% Series E Preferred Stock is convertible into our common stock and dividends, when declared, will be paid at our option in cash, our $0.20 par value common stock or any combination of the two. 11 . In January 2016, we initiated the Recapitalization Plan (see below). Recapitalization Plan In response to the decline of our operating cash flow, on January 26, 2016, the Company launched a comprehensive plan to reduce its cost structure and improve its operating results, cash flow from operations, liquidity and financial condition (the “ Recapitalization Plan · Offers to exchange (the “ Preferred Stock Exchange Offers · Offers to exchange (the “ Unsecured Notes Exchange Offers 3.25% Convertible Senior Notes due 2026 (the “2026 Notes”) 5.0% Convertible Senior Notes due 2029 (the “2029 Notes”) · Private negotiations with holders of its Second Lien Notes to offer to exchange (the “ Second Lien Exchange Offers Exchange Offers · Upon completion of the Exchange Offers, the Company plans to amend its 2006 Long-Term Incentive Plan (the “ 2006 Plan If successful, the Recapitalization Plan will have several positive effects on the Company’s capital structure and the holders of our common stock, including: (i) the reduction in debt and preferred liquidation preference versus substantial dilution to the Company’s outstanding common stock expected to result from the Recapitalization Plan; (ii) the reduction of the Company’s fixed dividend obligations and the increase in the percentage of its capitalization that is common stock; (iii) the simplification of the Company’s capital structure and the elimination of the market overhang caused by the outstanding Preferred Stock and the liquidation preferences of the Preferred Stock; (iv) expected improvements in institutional investor interest in the Company’s common stock following the Recapitalization Plan due to an improved balance sheet and (v) the increased ability of the Company to address its near-term liquidity needs, including the material reduction of cash interest expense on the Company’s secured debt obligations and the increased likelihood of attracting new capital due to a significantly improved balance sheet. The Recapitalization Plan is intended to facilitate a proposed recapitalization of the Company in an effort to simplify its capital structure, preserve liquidity and increase its ability to comply with its debt instruments during the current decline in the oil and gas industry. The Exchange Offers are conditioned, among other things, on (i) the Company’s common shareholders approving an amendment to the Company’s Restated Certificate of Incorporation increasing the number of authorized shares of common stock to 400 million (the “Authorized Share Amendment Proposal”) and (ii) the satisfaction of certain minimum participation thresholds according to the terms of each of the Exchange Offers. The Company will hold a special meeting of stockholders on March 31, 2016 to approve the Authorized Share Amendment Proposal. Going Concern The accompanying consolidated financial statements have been prepared assuming the Company will continue as a going concern, which contemplates continuity of operations, realization of assets and the satisfaction of liabilities in the normal course of business for the twelve month period following the date of these consolidated financial statements. As such, the accompanying consolidated financial statements do not include any adjustments relating to the recoverability and classification of assets and their carrying amounts, or the amount and classification of liabilities that may result should the Company be unable to continue as a going concern. Given the downturn in oil and natural gas prices, we expect to continue to face liquidity constraints. Our cash flows are negatively impacted by lower realized oil and natural gas sales prices. As of December 31, 2015 we no longer had any oil derivative contracts in place. Given the current oil futures pricing, we currently have limited hedging opportunities; as a result, we do not anticipate having in place any derivative positions with respect to our 2016 anticipated oil and condensate sales volumes and thus expect further deteriorating realized sale prices if oil prices do not improve. The significant decline in oil and natural gas prices also increases the uncertainty as to the impact of commodity prices on our estimated proved reserves. We are unable to predict future commodity prices with any greater precision than the futures market. The prolonged period of depressed commodity prices has significantly impacted our estimated proved reserves as of December 31, 2015. Future declines in commodity prices and estimated proved reserves could lead to further reductions of our borrowing base under the Senior Credit Facility. Such reductions could prevent us from borrowing additional amounts under the Senior Credit Facility or, if the borrowing base were to be reduced below the then-outstanding borrowings, could require us to repay the shortfall and could otherwise limit our ability to obtain alternative financing. Without the restructuring of our current obligations under our existing outstanding debt and preferred stock instruments, we anticipate that we will violate the First Lien Debt to EBITDAX financial covenant ratio under the Senior Credit Facility at the end of the third quarter of 2016. We could request a waiver of this covenant violation; however, there is no assurance a waiver will be granted. If a waiver is not granted, we would be in default under the Senior Credit Facility and all amounts outstanding under the Senior Credit Facility would be immediately due and payable. The obligation to repay all such amounts could force us to seek bankruptcy protection. Collectively, the factors discussed above raise substantial doubt about our ability to continue as a going concern. Furthermore, if we are unable to , and address near-term liquidity needs, we may need to seek relief under the U.S. Bankruptcy Code. This relief may include: (i) seeking bankruptcy court approval for the sale or sales of some, most or substantially all of the Company’s assets pursuant to section 363(b) of the U.S. Bankruptcy Code and a subsequent liquidation of the remaining assets in the bankruptcy case; (ii) pursuing a plan of reorganization (where votes for the plan may be solicited from certain classes of creditors prior to a bankruptcy filing) that the Company would seek to confirm (or “cram down”) despite any classes of creditors who reject or are deemed to have rejected such plan; or (iii) seeking another form of bankruptcy relief, all of which involve uncertainties, potential delays and litigation risks.
Principles of Consolidation	Principles of Consolidation —The consolidated financial statements of the Company are included in this Annual Report on Form 10-K have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) and in accordance with US GAAP. The consolidated financial statements include the financial statements of Goodrich Petroleum Corporation 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 include cash on hand, demand deposit accounts and temporary cash investments with maturities of ninety days or less at date of purchase.
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts —We routinely assess the recoverability of all material trade and other receivables to determine their collectability. Many of our receivables are from a limited number of purchasers. Accordingly, accounts receivable from such purchases could be significant. Generally, our natural gas and crude oil receivables are collected within thirty to sixty days of production. We also have receivables from joint interest owners of properties we operate. We may have the ability to withhold future revenue disbursements to recover any non-payment of joint interest billings. We accrue a reserve on a receivable when, based on the judgment of management, it is probable that a receivable will not be collected and the amount of the reserve may be reasonably estimated. As of December 31, 2015 our allowance for doubtful accounts was immaterial, while at December 31, 2014 we had no allowance for doubtful accounts.
Inventory	Inventory –Inventory consists of casing and tubulars that are expected to be used in our capital drilling program and oil in storage tanks. Inventory is carried on the Consolidated Balance Sheets at the lower of cost or market.
Property and Equipment	Property and Equipment —We follow the successful efforts method of accounting for exploration and development expenditures. 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.
Exploration	Exploration —Exploration expenditures, including geological and geophysical costs, delay rentals and exploratory dry hole costs are expensed as incurred. Costs of drilling exploratory wells are initially capitalized pending determination of whether proved reserves can be attributed to the discovery. If management determines that commercial quantities of hydrocarbons have not been discovered, capitalized costs associated with exploratory wells are expensed . We had no capitalized exploratory well costs that were pending the determination of proved reserves as of December 31, 2015 and had $14.5 million as of December 31, 2014. During 2015 and 2014, all of the December 31, 2014 and December 31 2013 pending exploratory well costs were capitalized, respectively. During 2013 $4.4 million of the December 31, 2012 pending capitalized costs were expensed.
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 is our senior notes; · Level 2 Inputs—quotes which are derived principally from or corroborated by observable market data. Included in this level are our Senior Credit Facility 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, our 2032 Exchange Notes, 8.0% Second Lien Notes, the embedded derivative associated with the 8.0% Second Lien Notes (see Note 4) and 8.875% Second Lien Notes. As of December 31, 2015 and 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. Fair Value Measurements as of December 31, 2015 (in thousands) Description Level 1 Level 2 Level 3 Total Recurring Fair Value Measurements Commodity derivatives (see Note 8) $ — $ (30 ) $ — $ (30 ) Debt (see Note 4) (16,336 ) (27,064 ) (48,747 ) (92,147 ) Total recurring fair value measurements $ (16,336 ) $ (27,094 ) $ (48,747 ) $ (92,177 ) Nonrecurring Fair Value Measurements Impaired oil and natural gas properties $ — $ — $ 63,395 $ 63,395
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 overstated or carried in excess of fair value, which is computed using level 3 inputs such as discounted cash flow models or valuations. Significant level 3 assumptions associated with discounted cash flow models or valuations used in the impairment evaluation include estimates of future crude oil and natural gas prices, production costs, development expenditures, anticipated production of proved reserves, appropriate risk-adjusted discount rates and other relevant data. 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. To determine if a field is impaired, we compare the carrying value of the field to the undiscounted future net cash flows by applying management’s estimates of proved reserves, future oil and natural gas prices, future production of oil and natural gas reserves and future operating costs over the economic life of the property. In addition, other factors such as probable and possible reserves are taken into consideration when justified by economic conditions and the availability of capital to develop proved undeveloped reserves. For each property determined to be impaired, we recognize an impairment loss equal to the difference between the estimated fair value and the carrying value of the field. Fair value is estimated to be the present value of expected future net cash flows. Any impairment charge incurred is recorded in accumulated depletion, depreciation and amortization to reduce the carrying value of the field. Each part of this calculation is subject to a large degree of judgment, including the determination of the fields’ estimated reserves, future cash flows and fair value. As of December 31, 2015, we had interests in oil and natural gas properties totaling $69.6 million, net of accumulated depletion, which we account for under the successful efforts method. The expected future cash flows used for impairment reviews and related fair-value calculations are based on judgmental assessments of future production volumes, prices, and costs, considering all available information at the date of review. Due to the uncertainty inherent in these factors, we cannot predict when or if additional future impairment charges will be recorded. We estimate future net cash flows generated from our oil and natural gas properties using forecasted oil and natural gas prices published by the New York Mercantile Exchange (“NYMEX”). In the third and fourth quarters of 2015, the average NYMEX 5-year forward strip pricing for oil and natural gas had significantly decreased compared to year end 2014. The declines Our impairment analysis in the third quarter of 2015 resulted in the recording a impairment on certain of our natural gas properties, During the fourth quarter of 2015, NYMEX forward 5-year strip oil prices continued to decline by an average of 16% and natural gas strip prices continued to decline by an average of 6%. The price declines in the fourth quarter of 2015 resulted in recording an additional impairment of $419.6 million on both our oil and natural gas properties. The $419.5 million impairment recognized in the fourth quarter of 2015 reduced the carrying value of the impaired fields to an estimated fair value of $63.4 million as of December 31, 2015. In the aggregate we recorded $452.0 million of impairments during 2015. For the year ended December 31, 2014 we recorded $ 331.9 million of impairments.
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 exchange for these services, we agreed to pay the service provider 110 percent of the total capital cost incurred by the service provider to construct new pipelines and facilities. The service provider bills us for 20 percent of the accumulated unpaid capital costs annually. This obligation was relieved upon the sale of our Eagle Ford Shale Trend properties in September 2015, however we are obligated to pay the 2015 annual billing. As a result, the transportation obligation liability was reduced to $1.0 million as of December 31, 2015. The transportation obligation liability was $5.4 million as of 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 was being amortized using the units-of-production method and the amortization expense was included in “Transportation and processing” on the Consolidated Statements of Operations. The related current and long-term liabilities were 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. The estimated fair value of the Company’s asset retirement obligations at inception is determined by utilizing the income approach by applying a credit-adjusted risk-free rate, which takes into account the Company’s credit risk, the time value of money, and the current economic state, to the undiscounted expected abandonment cash flows. Given the unobservable nature of the inputs, the measurement of the asset retirement obligations was classified as Level 3 in the fair value hierarchy.
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 December 31, 2015 and 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. We have not designated any of our derivative contracts as hedges; accordingly, changes in fair value are reflected in earnings.
Income Taxes	Income Taxes —We account for income taxes, as required, under the liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carry-forwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion or all of the deferred tax assets will not be realized. We recognize, as required, the financial statement benefit of an uncertain tax position only after determining that the relevant tax authority would more likely than not sustain the position following an audit. For tax positions meeting the more-likely-than-not threshold, the amount recognized in the financial statements is the largest benefit that has a greater than 50 percent likelihood of being realized upon ultimate settlement with the relevant tax authority.
Earnings-Per Share	Earnings Per Share —Basic income or loss per common share is computed by dividing net income or loss available to common stockholders for each reporting period by the weighted-average number of common shares outstanding during the period. Diluted income or loss per common share is computed by dividing net income or loss available 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 and restricted stock calculated using the Treasury Stock method and the potential dilutive effect of the conversion of shares associated with Series B Preferred Stock, Series E Preferred Stock, 2026 Notes, 2029 Notes, 2032 Notes and the 2032 Exchange Notes.
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.
Concentration of Credit Risk	Concentration of Credit Risk —Due to the nature of the industry, we sell our oil and natural gas production to a limited number of purchasers and, accordingly, amounts receivable from such purchasers could be significant. The revenues compared to our total oil and natural gas revenues from the top purchasers for the years ended December 31, 2015, 2014 and 2013 are as follows: Year Ended December 31, 2015 2014 2013 BP Energy Company 31 % 46 % 64 % Genesis Crude Oil LP 26 % 11 % 7 % Sunoco, Inc. 17 % 5 % —
Share-Based Compensation	Share-Based Compensation —We account for our share-based transactions using fair value and recognize compensation expense over the requisite service period. The fair value of each option award is estimated using a Black-Scholes option valuation model with various assumptions based on our estimates. Our assumptions include expected volatility, expected term of option, risk-free interest rate and dividend yield. Expected volatility estimates are developed by us based on historical volatility of our stock. We use historical data to estimate the expected term of the options. The risk-free interest rate for periods within the expected life of the option is based on the U.S. Treasury yield in effect at the grant date. Our common stock does not pay dividends; therefore, the dividend yield is zero. The fair value of each restricted stock award is measured using the closing price of our common stock on the day of the award.
Guarantees	Guarantee —On March 2, 2011, we issued and sold $ 275 million aggregate principal amount of our 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. On March 12, 2015, we issued and sold $100 million aggregate principal amount of our 8.0% Second Lien Notes and upon issuance our subsidiary became the guarantor of the 8.0% Second Lien Notes under the governing indenture. On September 8, 2015 and October 14, 2015, we issued $27.5 million and $8.5 million, respectively, aggregate principal amount of our 2032 Exchange Notes and, upon issuance, our subsidiary became the guarantor of the 2032 Exchange Notes under the governing indenture. On October 1, 2015, we issued and sold $75 million aggregate principal amount of our 8.875% Second Lien Notes and upon issuance our subsidiary became the guarantor of the 8.875% Second Lien Notes under the governing indenture. The 2019 Notes, 2029 Notes, 2026 Notes, 2032 Notes, 8.0% Second Lien Notes, 2032 Exchange Notes, and 8.875 Second Lien Notes are guaranteed on a senior unsecured basis by our wholly-owned subsidiary, Goodrich Petroleum Company, L.L.C. Goodrich Petroleum Corporation, as the parent company (the “Parent Company”), has no independent assets or operations. The guarantee is full and unconditional, subject to customary exceptions pursuant to the indenture governing our 2019 Notes, 2026 Notes, 2029 Notes, 2032 Notes, 8.0% Second Lien Notes, 2032 Exchange Notes, and 8.875 Second Lien 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 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 Exchange Notes, 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 Exchange Notes, 2032 Notes, 2029 Notes or 2026 Notes in accordance with their respective indentures. Guarantees of the 8.0% Second Lien Notes and 8.875% Second Lien Notes (the “Second Lien Notes ) will be released under certain circumstances, including in the event the 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 8.0% 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 November 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update (“ASU”) adoption of this guidance is not expected to have a material impact on our consolidated financial statements. In September 2015, the FASB issued ASU 2015-16, which ASU 2015-16 In August 2015, the FASB ASU . The ASU incorporates the SEC staff's announcement that clarifies the exclusion of line-of-credit arrangements from the scope of ASU 2015-03. Therefore, debt issuance costs related to line-of-credit arrangements can be deferred and presented as an asset that is subsequently amortized over the time of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. We are currently evaluating the provisions of this ASU and assessing the impact it may have on our consolidated financial statements. In April 2015, the FASB ASU 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, 2017, 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, Mana21

Description of Business, Management Plan and Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Schedule of Carrying Amount of Cash and Cash Equivalents, Trade Receivables and Payables in Fair Value	As of December 31, 2015 and 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. Fair Value Measurements as of December 31, 2015 (in thousands) Description Level 1 Level 2 Level 3 Total Recurring Fair Value Measurements Commodity derivatives (see Note 8) $ — $ (30 ) $ — $ (30 ) Debt (see Note 4) (16,336 ) (27,064 ) (48,747 ) (92,147 ) Total recurring fair value measurements $ (16,336 ) $ (27,094 ) $ (48,747 ) $ (92,177 ) Nonrecurring Fair Value Measurements Impaired oil and natural gas properties $ — $ — $ 63,395 $ 63,395
Revenues from Top Customers as Percentage of Total Revenues	The revenues compared to our total oil and natural gas revenues from the top purchasers for the years ended December 31, 2015, 2014 and 2013 are as follows: Year Ended December 31, 2015 2014 2013 BP Energy Company 31 % 46 % 64 % Genesis Crude Oil LP 26 % 11 % 7 % Sunoco, Inc. 17 % 5 % —

Share-Based Compensation Plans

Share-Based Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Components of Share-Based Compensation	The following table summarizes the pretax components of our share-based compensation programs recorded, recognized as a component of general and administrative expenses in the Consolidated Statements of Operations (in thousands): Year Ended December 31, 2015 2014 2013 Restricted stock expense $ 6,689 $ 9,555 $ 7,586 Stock option expense — — 94 Director stock expense 754 734 568 Total share-based compensation: $ 7,443 $ 10,289 $ 8,248
Schedule of Option Activity Under Stock Option Plans	Option activity under our stock option plans as of December 31, 2015, and changes during the year ended December 31, 2015 were as follows: Shares Weighted Average Exercise Price Remaining Contractual Term Aggregate Intrinsic Value (years) (thousands) Outstanding at January 1, 2015 690,834 $ 22.83 1.02 $ 88 Granted — — — — Exercised — — — — Forfeited 630,834 22.35 — — Outstanding at December 31, 2015 60,000 $ 27.81 0.36 — Exercisable at December 31, 2015 60,000 $ 27.81 0.36 —
Schedule of Share-Based Compensation by Exercise Price Range	Options Outstanding Options Exercisable Range of Exercise Prices Number Outstanding December 31, 2015 Weighted Average Remaining Contractual Life Weighted Average Exercise Price Number Exercisable December 31, 2015 Weighted Average Exercise Price (years) $27.81 60,000 0.36 27.81 60,000 27.81 60,000 0.36 27.81 60,000 27.81
Schedule of Restricted Stock Activity	Restricted stock activity under our plan for the year ended December 31, 2015, and changes during the year then ended were as follows: Number of Shares Weighted Average Grant-Date Fair Value Total Value (thousands) Unvested at January 1, 2015 1,939,940 $ 8.26 $ 16,018 Vested (870,500 ) 7.84 (6,827 ) Granted 2,679,580 0.94 2,512 Forfeited (612,169 ) 7.57 (4,637 ) Unvested at December 31, 2015 3,136,851 — $ 7,066
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Schedule of Restricted Stock Activity And Values	Restricted stock activity and values under our plan for the years ended December 31, 2015, 2014 and 2013 were as follows: Number of Shares Granted Value of Shares Granted Fair Value of Stock Vested (thousands) (thousands) 2015 2,679,580 $ 2,525 $ 394 2014 1,192,114 5,368 6,425 2013 746,163 13,194 9,960
Schedule of Restricted Stock Activity	As of December 31, 2015, total unrecognized compensation cost related to restricted stock is as follows: Unrecognized compensation costs Weighted Average years to recognition (thousands) (years) December 31, 2015 $ 6,556 1.56

Asset Retirement Obligations (T

Asset Retirement Obligations (Tables)	12 Months Ended
	Dec. 31, 2015
Asset Retirement Obligation Disclosure [Abstract]
Reconciliation of Asset Retirement Obligations	The reconciliation of the beginning and ending asset retirement obligation for the periods ending December 31, 2015 and 2014 is as follows (in thousands): December 31, 2015 2014 Beginning balance $ 6,510 $ 20,856 Liabilities incurred 15 385 Revisions in estimated liabilities — 53 Liabilities settled (62 ) (5 ) Accretion expense 434 1,420 Dispositions (1) (3,169 ) (16,199 ) Ending balance $ 3,728 $ 6,510 Current liability $ 83 $ 145 Long term liability $ 3,645 $ 6,365 (1) The majority of the 2015 dispositions represent the divestiture of our producing Eagle Ford Shale Trend properties. The majority of the 2014 dispositions represent the divestiture of our East Texas properties.

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Components of Debt	Debt consisted of the following balances as of the dates indicated (in thousands): December 31, 2015 December 31, 2014 Principal Carrying Amount Fair Value (1) Principal Carrying Amount Fair Value (1) Senior Credit Facility $ 27,000 $ 27,000 $ 27,000 $ 121,000 $ 121,000 $ 121,000 8.0% Second Lien Senior Secured Notes due 2018 (2) 100,000 88,971 14,512 — — — 8.875% Second Lien Senior Secured Notes due 2018 75,000 91,364 7,586 — — — 8.875% Senior Notes due 2019 116,828 116,828 9,346 275,000 275,000 136,125 3.25% Convertible Senior Notes due 2026 429 429 64 429 429 353 5.0% Convertible Senior Notes due 2029 (3) 6,692 6,692 67 6,692 6,692 3,480 5.0% Convertible Senior Notes due 2032 (4) 98,664 96,694 6,923 170,770 165,504 87,093 5.0% Convertible Exchange Senior Notes due 2032 26,849 42,625 26,649 — — — Total debt $ 451,462 $ 470,603 $ 92,147 $ 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 values of the notes were obtained by direct market quotes within Level 1 of the fair value hierarchy. The fair value of our Second Lien Notes and 2032 Exchange Notes were obtained using a discounted cash flow model within Level 3 of the fair value hierarchy. Level 1 and Level 3 of the fair value hierarchy are defined in this Item 8. (2) 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 8.0% Second Lien Notes. The debt discount as of December 31, 2015 was $11.0 million. (3) 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. (4) 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 $2.0 million and $ 5.3 million as of December 31, 2015 and December 31, 2014, respectively.
Summary of Total Interest Expense and Effective Interest Rate on Debt	The following table summarizes the total interest expense for the years ended (contractual interest expense, amortization of debt discount, accretion and financing costs) and the effective interest rate December 31, 2015 December 31, 2014 December 31, 2013 Interest Expense Effective Interest Rate Interest Expense Effective Interest Rate Interest Expense Effective Interest Rate Senior Credit Facility $ 4,308 5.1 % $ 3,943 5.2 % $ 3,936 5.3 % 8.0% Second Lien Senior Secured Notes due 2018 11,515 16.4 % — — — — 8.875% Second Lien Senior Secured Notes due 2018 2,333 * — — — — 8.875% Senior Notes due 2019 21,668 9.2 % 25,308 9.2 % 25,308 9.2 % 3.25% Convertible Senior Notes due 2026 13 3.3 % 14 3.3 % 14 3.3 % 5.0% Convertible Senior Notes due 2029 335 5.0 % 4,363 11.0 % 17,400 11.4 % 5.0% Convertible Senior Notes due 2032 12,495 8.6 % 14,201 8.7 % 4,529 8.8 % 5.0% Convertible Exchange Senior Notes due 2032 2,088 * — — — — Other 52 * — — — — Total $ 54,807 $ 47,829 $ 51,187 * - Not meaningful

Loss Per Common Share (Tables)

Loss Per Common Share (Tables)	12 Months Ended
	Dec. 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. Year Ended December 31, 2015 2014 2013 (Amounts in thousands, except per share data) Basic and Diluted loss per share: Net loss applicable to common stock $ (409,880 ) $ (382,858 ) $ (113,790 ) Weighted-average shares of common stock outstanding 56,315 44,402 38,098 Basic and Diluted loss per share (1) (2) (3) $ (7.28 ) $ (8.62 ) $ (2.99 ) (1) Common shares issuable upon assumed conversion of convertible preferred stock or dividends paid were not presented as they would have been anti-dilutive. 20,145 3,588 3,588 (2) Common shares issuable upon assumed conversion of the 2026 Notes, 2029 Notes, 2032 Notes and 2032 Exchange Notes or interest paid were not presented as they would have been anti-dilutive. 15,728 4,997 6,307 (3) Common shares issuable on assumed conversion of restricted stock, stock warrants and employee stock options were not included in the computation of diluted loss per common share since their inclusion would have been anti-dilutive. 14,081 2,631 2,436

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Reconciliation of Statutory Income Tax Rate to Income Loss Before Income Taxes	The following is a reconciliation of the U.S. statutory income tax rate at 35% to our loss before income taxes (in thousands): Year Ended December 31, 2015 2014 2013 Income tax (expense) benefit Tax at U.S. statutory income tax $ 167,799 $ 123,597 $ 33,315 Valuation allowance (185,698 ) (122,032 ) (30,967 ) State income taxes-net of federal benefit 22,110 2,484 (902 ) Nondeductible expenses and other (4,211 ) (4,049 ) (1,446 ) Total tax (expense) benefit $ — $ — $ —
Schedule Of Deferred Tax (Liabilities) Assets	The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities are presented below (in thousands): December 31, 2015 2014 Current deferred tax assets: Derivative financial instruments $ 10 $ — Contingent liabilities and other 130 366 Compensation — 1,307 Less: valuation allowance (140 ) (1,566 ) Total current deferred tax assets — 107 Current deferred tax liabilities: Derivative financial instruments — (16,569 ) Accrued liabilities (26 ) (26 ) Total current deferred tax liabilities (26 ) (16,595 ) Net current deferred tax liability $ (26 ) $ (16,488 ) Noncurrent deferred tax assets: Operating loss carry-forwards $ 286,441 $ 256,240 State Tax NOL and Credits 12,383 7,974 Statutory depletion carry-forward 7,035 7,035 AMT tax credit carry-forward 1,052 1,114 Compensation 3,040 3,105 Contingent liabilities and other 523 522 Derivative financial instruments — 162 Debt discount 17,652 — Property and equipment 172,313 82,990 Total gross noncurrent deferred tax assets 500,439 359,142 Less valuation allowance (500,308 ) (336,841 ) Net noncurrent deferred tax assets 131 22,301 Noncurrent deferred tax liabilities: Bond discount (105 ) (89 ) Debt discount — (5,724 ) Total non-current deferred tax liabilities (105 ) (5,813 ) Net non-current deferred tax asset $ 26 $ 16,488

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Components of Preferred Stock, Net	The following table sets forth information related to the components of Preferred stock, net on our Consolidated Statements of Operations: Year Ended December 31, 2015 2014 2013 (Amounts in thousands) Preferred stock, net: Preferred stock dividends $ 14,861 $ 29,722 $ 18,604 Preferred stock dividends in arrears 10,464 — — Preferred stock exchange (94,869 ) — — $ (69,544 ) $ 29,722 $ 18,604

Derivative Activities (Tables)

Derivative Activities (Tables)	12 Months Ended
	Dec. 31, 2015
Summary of Gains and Losses on Derivatives	The following table summarizes the gains and losses we recognized on our oil and natural gas derivatives for the years ended December 31, 2015, 2014 and 2013. December 31, Oil and Natural Gas Derivatives (in thousands) 2015 2014 2013 Gain (loss) on derivatives not designated as hedges $ 7,367 $ 49,423 $ (702 )
Outstanding Commodity Derivative Contracts	As of December 31, 2015, our open positions on our outstanding commodity derivative contracts, all of which were with JPMorgan Chase Bank, N.A. and Wells Fargo Bank, N.A., were as follows: Contract Type Daily Volume Total Volume Fixed Price Fair Value at December 31, 2015 (in thousands) Natural gas calls (MMBtu) 2016 20,000 7,320,000 $ 5.05-5.06 $ (30 ) $ (30 )
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 December 31, 2015 and 2014 (in thousands). We measure the fair value of our commodity derivative contracts by applying the income approach. See Note 1 “Fair Value Measurement” for our discussion for inputs used and valuation techniques for determining fair values. 2015 Fair Value Measurements Using Description Level 1 Level 2 Level 3 Total Current Assets Commodity Derivatives $ — $ — $ — $ — Non-current Assets Commodity Derivatives — — — — Current Liabilities Commodity Derivatives — (30 ) — (30 ) Non-current Liabilities Commodity Derivatives — — — — Total $ — $ (30 ) $ — $ (30 ) 2014 Fair Value Measurements Using Description Level 1 Level 2 Level 3 Total Current Assets Commodity Derivatives $ — $ 47,444 $ — $ 47,444 Non-current Assets Commodity Derivatives — — — — Current Liabilities Commodity Derivatives — (102 ) — (102 ) Non-current Liabilities Commodity Derivatives — (464 ) — (464 ) Total $ — $ 46,878 $ — $ 46,878
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 Statements of Financial Position for the periods ending December 31, 2015 and December 31, 2014. December 31, 2015 December 31, 2014 Fair Value of Oil and Natural Gas Derivatives (in thousands) Gross Amount Amount Offset As Presented Gross Amount Amount Offset As Presented Derivative Current Asset $ — $ — $ — $ 47,444 $ — $ 47,444 Derivative Non-current Asset — — — — — — Derivative Current Liability (30 ) — (30 ) (102 ) — (102 ) Derivative Non-current Liability — — — (464 ) — (464 ) Total $ (30 ) $ — $ (30 ) $ 46,878 $ — $ 46,878

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2015
Commitments And Contingencies Disclosure [Abstract]
Timing of Future Payments Obligations	The table below provides estimates of the timing of future payments that we are obligated to make based on agreements in place at December 31, 2015 (in thousands). Payment due by Period Note Total 2016 2017 2018 2019 2020 and After Debt (1) 4 $ 429,468 $ 429,468 $ — $ — $ — $ — Interest on notes 4 76,725 31,363 30,941 11,984 2,437 — Office space leases 5,449 1,381 1,430 1,479 1,159 — Office equipment leases 194 117 77 — — — Operations contracts 8,193 8,174 19 — — — Transportation contracts 1,000 1,000 — — — — Total contractual obligations (2) $ 521,029 $ 471,503 $ 32,467 $ 13,463 $ 3,596 $ — (1) As stated previously, all debt outstanding as of December 31, 2015 has been classified as a current liability. For additional information see Note 4—Debt. (2) This table does not include the estimated liability for dismantlement, abandonment and restoration costs of oil and natural gas properties of $3.7 million as of December 31, 2015. We record a separate liability for the asset retirement obligations. See Note 3.

Summarized Quarterly Financia30

Summarized Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Summarized Quarterly Financial Data	(In Thousands, Except Per Share Amounts) First Quarter Second Quarter Third Quarter Fourth Quarter Total 2015 Revenues $ 24,030 $ 26,101 $ 17,729 $ 9,790 $ 77,650 Operating income (loss) (13,469 ) (10,879 ) (10,095 ) (460,096 ) (494,539 ) Net income (loss) (21,118 ) (31,638 ) (17,796 ) (408,872 ) (479,424 ) Net income (loss) applicable to common stock (28,549 ) (39,068 ) (25,226 ) (317,037 ) (409,880 ) Basic income (loss) per common share (0.58 ) (0.68 ) (0.44 ) (5.19 ) (7.28 ) Diluted income (loss) per common share (0.58 ) (0.68 ) (0.44 ) (5.19 ) (7.28 ) 2014 Revenues $ 51,803 $ 53,319 $ 54,874 $ 48,557 $ 208,553 Operating income (loss) (2,123 ) (3,552 ) (87,420 ) (261,725 ) (354,820 ) Net income (loss) (22,492 ) (25,106 ) (79,711 ) (225,827 ) (353,136 ) Net income (loss) applicable to common stock (29,923 ) (32,536 ) (87,142 ) (233,257 ) (382,858 ) Basic income (loss) per common share (0.68 ) (0.73 ) (1.96 ) (5.23 ) (8.62 ) Diluted income (loss) per common share (0.68 ) (0.73 ) (1.96 ) (5.23 ) (8.62 )

Description of Business, Mana31

Description of Business, Management Plan and Accounting Policies - Additional Information (Detail) - USD ($)		Mar. 15, 2016	Oct. 14, 2015	Oct. 02, 2015	Sep. 08, 2015	Mar. 10, 2015	Oct. 01, 2013	Aug. 26, 2013	Mar. 02, 2011	Sep. 30, 2015	Sep. 04, 2015	Dec. 31, 2015		Sep. 30, 2015	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2006	Mar. 31, 2016	Jan. 26, 2016	Oct. 31, 2015	Oct. 01, 2015	Mar. 12, 2015	Sep. 30, 2009
Description Of Company And Significant Accounting Policies [Line Items]
Interest payment grace period															30 days
Proceeds from Second Lien Notes															$ 100,000,000
Net proceeds from public offering of common stock						$ 47,500,000									47,480,000				$ 166,149,000
Common stock issued in public offering						12,000,000
Proceeds from sale of assets															113,533,000		$ 53,932,000		449,000
Debt instrument, principal amount												$ 451,462,000			$ 451,462,000		$ 573,891,000
Common stock, par value												$ 0.20			$ 0.20		$ 0.20							$ 0.20
Common stock, shares authorized												150,000,000			150,000,000		150,000,000
Allowance for doubtful accounts, receivable																	$ 0
Capitalized exploratory well cost pending proved reserves												$ 0			$ 0		14,500,000
Capitalized exploratory well cost, charged to expense															0		0		4,400,000
Interests in oil and gas properties, net of accumulated depletion												69,600,000			69,600,000
Impairment												419,500,000		$ 32,500,000	452,037,000		331,931,000
Impaired oil and natural gas properties										$ 7,800,000		63,400,000		$ 7,800,000	$ 63,400,000
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												$ 1,000,000			$ 1,000,000		$ 5,400,000
Dividend yield															0.00%
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%			25.00%
NYMEX Forward 5-year Strip Oil Prices
Description Of Company And Significant Accounting Policies [Line Items]
Decline in price of oil												16.00%
NYMEX Forward 5-year Strip Natural Gas prices
Description Of Company And Significant Accounting Policies [Line Items]
Decline in price of oil												6.00%
Scenario Forecast | Recapitalization, Change in Capital Structure
Description Of Company And Significant Accounting Policies [Line Items]
Common stock, shares authorized																					400,000,000
Subsequent Event
Description Of Company And Significant Accounting Policies [Line Items]
Interest payment due date		Mar. 15, 2016
Interest payment grace period		30 days
Subsequent Event | 2006 Plan | Restricted Stock
Description Of Company And Significant Accounting Policies [Line Items]
Issuance of common stock to existing management and employees																						27,100,000
Series B Cumulative Convertible Preferred Stock
Description Of Company And Significant Accounting Policies [Line Items]
Number of shares retired during period															758,434
Preferred stock, dividend rate, percentage															5.375%					5.375%
Series C Cumulative Preferred Stock
Description Of Company And Significant Accounting Policies [Line Items]
Number of shares retired during period															1,274,932
Preferred stock, dividend rate, percentage															10.00%
Series D Cumulative Preferred Stock
Description Of Company And Significant Accounting Policies [Line Items]
Number of shares retired during period															1,463,759
Preferred stock, dividend rate, percentage															9.75%
Series E Cumulative Convertible Preferred Stock
Description Of Company And Significant Accounting Policies [Line Items]
Common stock issued in public offering															3,648,803
Preferred stock, dividend rate, percentage															10.00%
Preferred stock conversion Basis															The 10% Series E Preferred Stock is convertible into our common stock and dividends, when declared, will be paid at our option in cash, our $0.20 par value common stock or any combination of the two
Eagle Ford Shale Trend
Description Of Company And Significant Accounting Policies [Line Items]
Proceeds from sale of assets										$ 110,000,000	$ 110,000,000
Minimum
Description Of Company And Significant Accounting Policies [Line Items]
Percentage of Staff Headcount Reduced																	50.00%
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
8.0% Second Lien Senior Secured Notes due 2018
Description Of Company And Significant Accounting Policies [Line Items]
Debt instrument interest rate												8.00%			8.00%
Interest payment due date															Mar. 15, 2016
Proceeds from Second Lien Notes															$ 100,000,000
Debt instruments maturity date															2,018
Debt instrument, principal amount	[1]											$ 100,000,000			$ 100,000,000
8.0% Second Lien Senior Secured Notes due 2018 | Subsequent Event
Description Of Company And Significant Accounting Policies [Line Items]
Debt instrument interest rate		8.00%																				8.00%
8.875% Second Lien Senior Secured Notes due 2018
Description Of Company And Significant Accounting Policies [Line Items]
Debt instrument interest rate												8.875%			8.875%									8.875%
Interest payment due date															Mar. 15, 2016
Debt instruments maturity date															2,018
Debt instrument, principal amount												$ 75,000,000			$ 75,000,000									$ 75,000,000
Common stock, par value																								$ 0.20
8.875% Second Lien Senior Secured Notes due 2018 | Subsequent Event
Description Of Company And Significant Accounting Policies [Line Items]
Debt instrument interest rate		8.875%																				8.875%
8.875% Senior Notes due 2019
Description Of Company And Significant Accounting Policies [Line Items]
Debt instrument interest rate									8.875%			8.875%			8.875%
Interest payment due date															Mar. 15, 2016
Debt instruments maturity date									2,019						2,019
Aggregate principal amount retired				$ 158,200,000											$ 158,200,000
Debt instrument, principal amount									$ 275,000,000			$ 116,828,000			$ 116,828,000		$ 275,000,000							$ 75,000,000
5.0% Convertible Senior Notes due 2029
Description Of Company And Significant Accounting Policies [Line Items]
Debt instrument interest rate												5.00%			5.00%
Interest payment due date															Apr. 1, 2016
Debt instruments maturity date															2,029
Aggregate principal amount retired																			166,700,000
Debt instrument, principal amount												$ 6,692,000	[2]		$ 6,692,000	[2]	6,692,000	[2]								$ 218,500,000
5.0% Senior Convertible Notes due 2032
Description Of Company And Significant Accounting Policies [Line Items]
Debt instrument interest rate												5.00%			5.00%
Interest payment due date															Apr. 1, 2016
Debt instruments maturity date							2,032	2,032							2,032
Aggregate principal amount retired			$ 17,100,000		$ 55,000,000										$ 72,100,000
Debt instrument, principal amount			8,500,000		27,500,000		$ 57,000,000	$ 109,250,000				$ 98,664,000	[3]		$ 98,664,000	[3]	170,770,000	[3]	$ 166,300,000
5.0% Convertible Exchange Senior Notes due 2032
Description Of Company And Significant Accounting Policies [Line Items]
Debt instrument interest rate												5.00%			5.00%
Interest payment due date															Apr. 1, 2016
Debt instrument, principal amount			$ 8,500,000		$ 27,500,000							$ 26,849,000			$ 26,849,000								$ 36,000,000
Senior Credit Facility
Description Of Company And Significant Accounting Policies [Line Items]
Maturity date of credit facility															Feb. 24, 2017
3.25% Convertible Senior Notes due 2026
Description Of Company And Significant Accounting Policies [Line Items]
Debt instrument interest rate												3.25%			3.25%
Debt instruments maturity date															2,026
Debt instrument, principal amount												$ 429,000			$ 429,000		$ 429,000
5.0% Convertible Senior Exchange Notes due 2032
Description Of Company And Significant Accounting Policies [Line Items]
Debt instrument interest rate												5.00%			5.00%
Interest payment due date															Apr. 1, 2016
Debt instruments maturity date			2,032		2,032										2,032
Debt instrument, principal amount			$ 8,500,000		$ 27,500,000
8.0% Second Lien Notes
Description Of Company And Significant Accounting Policies [Line Items]
Debt instrument interest rate												8.00%			8.00%										8.00%
Debt instrument, principal amount																									$ 100,000,000
8.875% Second Lien Notes
Description Of Company And Significant Accounting Policies [Line Items]
Debt instrument interest rate												8.875%			8.875%
Debt instrument, principal amount																								$ 75,000,000
[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 8.0% Second Lien Notes. The debt discount as of December 31, 2015 was $11.0 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 $2.0 million and $ 5.3 million as of December 31, 2015 and December 31, 2014, respectively.

Schedule of Carrying Amount of

Schedule of Carrying Amount of Cash and Cash Equivalents, Trade Receivables and Payables in Fair Value (Detail) - USD ($) $ in Thousands		Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Recurring Fair Value Measurements
Debt	[1]	$ (92,147)		$ (348,051)
Nonrecurring Fair Value Measurements
Impaired oil and natural gas properties		63,400	$ 7,800
Not Designated as Hedging Instrument | Commodity Derivatives
Recurring Fair Value Measurements
Commodity derivatives		(30)		46,878
Recurring Fair Value Measurements
Recurring Fair Value Measurements
Debt		(92,147)
Total recurring fair value measurements		(92,177)
Recurring Fair Value Measurements | Not Designated as Hedging Instrument | Commodity Derivatives
Recurring Fair Value Measurements
Commodity derivatives		(30)
Nonrecurring Fair Value Measurements
Nonrecurring Fair Value Measurements
Impaired oil and natural gas properties		63,395
Level 1 | Recurring Fair Value Measurements
Recurring Fair Value Measurements
Debt		(16,336)
Total recurring fair value measurements		(16,336)
Level 2 | Not Designated as Hedging Instrument | Commodity Derivatives
Recurring Fair Value Measurements
Commodity derivatives		(30)		$ 46,878
Level 2 | Recurring Fair Value Measurements
Recurring Fair Value Measurements
Debt		(27,064)
Total recurring fair value measurements		(27,094)
Level 2 | Recurring Fair Value Measurements | Not Designated as Hedging Instrument | Commodity Derivatives
Recurring Fair Value Measurements
Commodity derivatives		(30)
Level 3 | Recurring Fair Value Measurements
Recurring Fair Value Measurements
Debt		(48,747)
Total recurring fair value measurements		(48,747)
Level 3 | Nonrecurring Fair Value Measurements
Nonrecurring Fair Value Measurements
Impaired oil and natural gas properties		$ 63,395
[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 values of the notes were obtained by direct market quotes within Level 1 of the fair value hierarchy. The fair value of our Second Lien Notes and 2032 Exchange Notes were obtained using a discounted cash flow model within Level 3 of the fair value hierarchy. Level 1 and Level 3 of the fair value hierarchy are defined in this Item 8.

Revenues from Top Customers as

Revenues from Top Customers as Percentage of Total Revenues (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
BP Energy Company
Percentage Of Revenues Generated From Major Customers [Line Items]
Receipt compared to total receipts	31.00%	46.00%	64.00%
Genesis Crude Oil LP
Percentage Of Revenues Generated From Major Customers [Line Items]
Receipt compared to total receipts	26.00%	11.00%	7.00%
Sunoco, Inc.
Percentage Of Revenues Generated From Major Customers [Line Items]
Receipt compared to total receipts	17.00%	5.00%

Share-Based Compensation Plan34

Share-Based Compensation Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share Based Compensation [Line Items]
Shares reserved for issuance as awards	7,000,000
Shares available for future grants	0
Stock options outstanding, intrinsic value	$ 0	$ 88,000
Stock options, granted	0	0	0
Maximum
Share Based Compensation [Line Items]
Intrinsic value of options exercised	$ 300,000	$ 300,000	$ 300,000
2006 Plan
Share Based Compensation [Line Items]
Vesting Period	3 years
2006 Plan | Minimum
Share Based Compensation [Line Items]
Expiry date from the date of grant	7 years
2006 Plan | Maximum
Share Based Compensation [Line Items]
Expiry date from the date of grant	10 years
Restricted Stock
Share Based Compensation [Line Items]
Shares granted but unvested	3,100,000
Restricted Stock | 2006 Plan
Share Based Compensation [Line Items]
Vesting Period	3 years

Components of Share-Based Compe

Components of Share-Based Compensation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Restricted stock expense	$ 6,689	$ 9,555	$ 7,586
Stock option expense			94
Director stock expense	754	734	568
Total share-based compensation:	$ 7,443	$ 10,289	$ 8,248

Schedule of Option Activity Und

Schedule of Option Activity Under Stock Option Plans (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Number of Shares
Outstanding at January 1, 2015	690,834
Forfeited	630,834
Outstanding at December 31, 2015	60,000	690,834
Exercisable at December 31, 2015	60,000
Weighted Average Exercise Price
Outstanding at January 1, 2015	$ 22.83
Forfeited	22.35
Outstanding at December 31, 2015	27.81	$ 22.83
Exercisable at December 31, 2015	$ 27.81
Weighted Average Remaining Contractual Term
Outstanding	4 months 10 days	1 year 7 days
Exercisable at December 31, 2015	4 months 10 days
Average Intrinsic Value
Outstanding at January 1, 2015	$ 88,000
Outstanding at December 31, 2015	$ 0	$ 88,000

Schedule of Share-Based Compens

Schedule of Share-Based Compensation by Exercise Price Range (Detail)	12 Months Ended
	Dec. 31, 2015$ / sharesshares
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Options Outstanding - Number Outstanding at December 31, 2015 | shares	60,000
Options Outstanding - Weighted Average Remaining Contractual Life (years)	4 months 10 days
Options Outstanding - Weighted Average Exercise Price	$ 27.81
Options Exercisable - Number Exercisable at December 31, 2015 | shares	60,000
Options Exercisable - Weighted Average Exercise Price	$ 27.81
$ 27.81
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Range of Exercise Prices, Upper	$ 27.81
Options Outstanding - Number Outstanding at December 31, 2015 | shares	60,000
Options Outstanding - Weighted Average Remaining Contractual Life (years)	4 months 10 days
Options Outstanding - Weighted Average Exercise Price	$ 27.81
Options Exercisable - Number Exercisable at December 31, 2015 | shares	60,000
Options Exercisable - Weighted Average Exercise Price	$ 27.81

Schedule of Restricted Stock Ac

Schedule of Restricted Stock Activity And Values (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Shares Granted	2,679,580	1,192,114	746,163
Value of Shares Granted	$ 2,525	$ 5,368	$ 13,194
Fair Value of Stock Vested	$ 394	$ 6,425	$ 9,960

Schedule of Restricted Stock 39

Schedule of Restricted Stock Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Number of Shares
Unvested at January 1, 2015	1,939,940
Vested	(870,500)
Granted	2,679,580	1,192,114	746,163
Forfeited	(612,169)
Unvested at December 31, 2015	3,136,851	1,939,940
Weighted Average Grant-Date Fair Value
Unvested at January 1, 2015	$ 8.26
Vested	7.84
Granted	0.94
Forfeited	$ 7.57
Unvested at December 31, 2015		$ 8.26
Total Value
Unvested at January 1, 2015	$ 16,018
Vested	(6,827)
Granted	2,512
Forfeited	(4,637)
Unvested at December 31, 2015	$ 7,066	$ 16,018

Summary of Unrecognized Compens

Summary of Unrecognized Compensation Cost (Detail) - Restricted Stock $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation costs	$ 6,556
Weighted Average years to recognition	1 year 6 months 22 days

Reconciliation of Asset Retirem

Reconciliation of Asset Retirement Obligations (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Asset Retirement Obligation Disclosure [Abstract]
Beginning balance		$ 6,510	$ 20,856
Liabilities incurred		15	385
Revisions in estimated liabilities			53
Liabilities settled		(62)	(5)
Accretion expense		434	1,420
Dispositions	[1]	(3,169)	(16,199)
Ending balance		3,728	6,510
Current liability		83	145
Long term liability		$ 3,645	$ 6,365
[1]	The majority of the 2015 dispositions represent the divestiture of our producing Eagle Ford Shale Trend properties. The majority of the 2014 dispositions represent the divestiture of our East Texas properties.

Components of Debt (Detail)

Components of Debt (Detail) - USD ($) $ in Thousands		Dec. 31, 2015		Oct. 31, 2015	Oct. 14, 2015	Oct. 01, 2015	Sep. 08, 2015	Dec. 31, 2014		Dec. 31, 2013	Oct. 01, 2013	Aug. 26, 2013	Mar. 02, 2011	Sep. 30, 2009
Debt Instrument [Line Items]
Debt instrument, principal amount		$ 451,462						$ 573,891
Debt Instrument, Carrying Amount		470,603						568,625
Debt Instrument, Fair Value	[1]	92,147						348,051
Senior Credit Facility
Debt Instrument [Line Items]
Debt instrument, principal amount		27,000						121,000
Debt Instrument, Carrying Amount		27,000						121,000
Debt Instrument, Fair Value	[1]	27,000						121,000
8.0% Second Lien Senior Secured Notes due 2018
Debt Instrument [Line Items]
Debt instrument, principal amount	[2]	100,000
Debt Instrument, Carrying Amount	[2]	88,971
Debt Instrument, Fair Value	[1],[2]	14,512
8.875% Second Lien Senior Secured Notes due 2018
Debt Instrument [Line Items]
Debt instrument, principal amount		75,000				$ 75,000
Debt Instrument, Carrying Amount		91,364
Debt Instrument, Fair Value	[1]	7,586
8.875% Senior Notes due 2019
Debt Instrument [Line Items]
Debt instrument, principal amount		116,828				75,000		275,000					$ 275,000
Debt Instrument, Carrying Amount		116,828				$ 116,800		275,000
Debt Instrument, Fair Value	[1]	9,346						136,125
3.25% Convertible Senior Notes due 2026
Debt Instrument [Line Items]
Debt instrument, principal amount		429						429
Debt Instrument, Carrying Amount		429						429
Debt Instrument, Fair Value	[1]	64						353
5.0% Convertible Senior Notes due 2029
Debt Instrument [Line Items]
Debt instrument, principal amount		6,692	[3]					6,692	[3]					$ 218,500
Debt Instrument, Carrying Amount	[3]	6,692						6,692
Debt Instrument, Fair Value	[1],[3]	67						3,480
5.0% Senior Convertible Notes due 2032
Debt Instrument [Line Items]
Debt instrument, principal amount		98,664	[4]		$ 8,500		$ 27,500	170,770	[4]	$ 166,300	$ 57,000	$ 109,250
Debt Instrument, Carrying Amount	[4]	96,694						165,504
Debt Instrument, Fair Value	[1],[4]	6,923						$ 87,093
5.0% Convertible Exchange Senior Notes due 2032
Debt Instrument [Line Items]
Debt instrument, principal amount		26,849		$ 36,000	$ 8,500		$ 27,500
Debt Instrument, Carrying Amount		42,625
Debt Instrument, Fair Value	[1]	$ 26,649
[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 values of the notes were obtained by direct market quotes within Level 1 of the fair value hierarchy. The fair value of our Second Lien Notes and 2032 Exchange Notes were obtained using a discounted cash flow model within Level 3 of the fair value hierarchy. Level 1 and Level 3 of the fair value hierarchy are defined in this Item 8.
[2]	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 8.0% Second Lien Notes. The debt discount as of December 31, 2015 was $11.0 million.
[3]	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.
[4]	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 $2.0 million and $ 5.3 million as of December 31, 2015 and December 31, 2014, respectively.

Components of Debt (Parenthetic

Components of Debt (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Mar. 12, 2015	Dec. 31, 2014	Dec. 31, 2013
8.0% 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	Sep. 1, 2017
Debt instrument interest rate	8.00%
Debt discount	$ 11	$ 15.4
5.0% Convertible Senior Notes due 2029
Debt Instrument [Line Items]
Period of amortization on debt instrument	5 years
Debt discount amortization end date	Oct. 1, 2014
Debt instrument interest rate	5.00%
5.0% Senior Convertible Notes due 2032
Debt Instrument [Line Items]
Period of amortization on debt instrument	4 years
Debt discount amortization end date	Oct. 1, 2017
Debt instrument interest rate	5.00%
Debt discount	$ 2		$ 5.3	$ 7.5

Summary of Total Interest Expen

Summary of Total Interest Expense and Effective Interest Rate on Debt (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Interest Expense	$ 54,807	$ 47,829	$ 51,187
Senior Credit Facility
Debt Instrument [Line Items]
Interest Expense	$ 4,308	$ 3,943	$ 3,936
Effective Interest Rate	5.10%	5.20%	5.30%
8.0% Second Lien Senior Secured Notes due 2018
Debt Instrument [Line Items]
Interest Expense	$ 11,515
Effective Interest Rate	16.40%
8.875% Second Lien Senior Secured Notes due 2018
Debt Instrument [Line Items]
Interest Expense	$ 2,333
8.875% Senior Notes due 2019
Debt Instrument [Line Items]
Interest Expense	$ 21,668	$ 25,308	$ 25,308
Effective Interest Rate	9.20%	9.20%	9.20%
3.25% Convertible Senior Notes due 2026
Debt Instrument [Line Items]
Interest Expense	$ 13	$ 14	$ 14
Effective Interest Rate	3.30%	3.30%	3.30%
5.0% Convertible Senior Notes due 2029
Debt Instrument [Line Items]
Interest Expense	$ 335	$ 4,363	$ 17,400
Effective Interest Rate	5.00%	11.00%	11.40%
5.0% Senior Convertible Notes due 2032
Debt Instrument [Line Items]
Interest Expense	$ 12,495	$ 14,201	$ 4,529
Effective Interest Rate	8.60%	8.70%	8.80%
5.0% Convertible Exchange Senior Notes due 2032
Debt Instrument [Line Items]
Interest Expense	$ 2,088
Other
Debt Instrument [Line Items]
Interest Expense	$ 52

Debt - Additional Information (

Debt - Additional Information (Detail)

Mar. 15, 2016

Jan. 26, 2016

Nov. 03, 2015USD ($)

Oct. 14, 2015USD ($)

Oct. 02, 2015USD ($)

Sep. 08, 2015USD ($)

Oct. 01, 2013USD ($)

Aug. 26, 2013USD ($)

Mar. 02, 2011USD ($)

Dec. 31, 2015USD ($)$ / sharesshares

Dec. 31, 2015USD ($)NotesUnits$ / sharesshares

Dec. 31, 2013USD ($)

Mar. 29, 2016USD ($)

Jan. 06, 2016USD ($)

Oct. 31, 2015USD ($)

Oct. 01, 2015USD ($)$ / sharesshares

Sep. 04, 2015USD ($)

Mar. 31, 2015USD ($)

Mar. 12, 2015USD ($)

Feb. 26, 2015USD ($)

Dec. 31, 2014USD ($)$ / shares

Oct. 01, 2014USD ($)

Sep. 30, 2009USD ($)

Debt [Line Items]

Debt instrument, principal amount

$ 451,462,000

$ 451,462,000

$ 573,891,000

Interest payment grace period

30 days

Warrant to purchase shares | shares

156.9

Common stock, par value | $ / shares

$ 0.20

$ 0.20

$ 0.20

$ 0.20

Proceeds from Second Lien Notes

$ 100,000,000

Warrant exercise price | $ / shares

$ 1

Warrant expiration period

10 years

Number of warrants to purchase common stock | shares

38,250

Gains on restructuring of debt

$ 62,600,000

Debt Instrument, Carrying Amount

$ 470,603,000

470,603,000

$ 568,625,000

Warrant issuance

$ 17,473,000

Gain on restructuring of debt on a basic and diluted loss per share basis | $ / shares

$ 1.11

Accretion rate

2.00%

Net fair of the convert feature in additional paid in capital

$ 12,677,000

Subsequent Event

Debt [Line Items]

Interest payment due date

Mar. 15, 2016

Interest payment grace period

30 days

8.0% Second Lien Senior Secured Notes due 2018

Debt [Line Items]

Debt instrument, maturity date

Mar. 15, 2018

Debt instrument, principal amount

[1]

$ 100,000,000

$ 100,000,000

Debt instrument interest rate

8.00%

8.00%

Interest payment due date

Mar. 15, 2016

Number of notes sold | NotesUnits

100,000

Debt instrument, aggregate principal amount each unit

$ 1,000

$ 1,000

Warrant to purchase shares | shares

48.84

48.84

Proceeds from Second Lien Notes

$ 100,000,000

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 8.0% Second Lien Notes shall be due on September 1, 2017.

Warrant exercise price | $ / shares

$ 4.664

$ 4.664

Warrant expiration period

10 years

Number of days following registration effective date to consummate exchange offer

60 days

Discount rate

32.00%

Fair value of debt portion

$ 78,700,000

Debt discount

$ 11,000,000

11,000,000

$ 15,400,000

Equity component of debt

15,400,000

Embedded derivative, carrying value

5,900,000

5,900,000

Embedded derivative, fair value

5,100,000

$ 5,100,000

Debt discount amortization end date

Sep. 1, 2017

Debt Instrument, Carrying Amount

[1]

88,971,000

$ 88,971,000

Period of amortization on debt instrument

2 years 6 months

Debt instruments maturity date

2,018

8.0% Second Lien Senior Secured Notes due 2018 | Debt Instrument Redemption Period One

Debt [Line Items]

Redeemable redemption price, percentage of principal amount

106.00%

Debt instrument, redemption date

Mar. 15, 2016

8.0% Second Lien Senior Secured Notes due 2018 | Debt Instrument Redemption Period Two

Debt [Line Items]

Redeemable redemption price, percentage of principal amount

100.00%

Debt instrument, redemption date

Mar. 15, 2017

8.0% Second Lien Senior Secured Notes due 2018 | First Ninety Days

Debt [Line Items]

Additional interest on principal amount

0.25%

8.0% Second Lien Senior Secured Notes due 2018 | Each Additional Ninety Days

Debt [Line Items]

Additional interest on principal amount

0.25%

8.0% Second Lien Senior Secured Notes due 2018 | Maximum | Each Additional Ninety Days

Debt [Line Items]

Additional interest on principal amount

1.00%

8.0% Second Lien Senior Secured Notes due 2018 | Subsequent Event

Debt [Line Items]

Debt instrument interest rate

8.00%

8.00%

8.875% Senior Notes due 2019

Debt [Line Items]

Debt instrument, maturity date

Mar. 15, 2019

Debt instrument, principal amount

$ 275,000,000

$ 116,828,000

$ 116,828,000

$ 75,000,000

275,000,000

Aggregate principal amount retired

$ 158,200,000

$ 158,200,000

Debt instrument interest rate

8.875%

8.875%

8.875%

Interest payment due date

Mar. 15, 2016

Debt Instrument, Carrying Amount

$ 116,828,000

$ 116,828,000

116,800,000

275,000,000

Debt instruments maturity date

2,019

2,019

8.875% Senior Notes due 2019 | Debt Instrument Redemption Period One

Debt [Line Items]

Aggregate principal amount retired

81,700,000

Redeemable redemption price, percentage of principal amount

104.438%

Debt instrument, redemption date

Mar. 15, 2015

8.875% Senior Notes due 2019 | Debt Instrument Redemption Period Two

Debt [Line Items]

Aggregate principal amount retired

76,500,000

Redeemable redemption price, percentage of principal amount

102.219%

Debt instrument, redemption date

Mar. 16, 2016

8.875% Senior Notes due 2019 | Option 3

Debt [Line Items]

Redeemable redemption price, percentage of principal amount

100.00%

Debt instrument, redemption date

Mar. 15, 2017

8.875% Senior Notes due 2019 | Subsequent Event

Debt [Line Items]

Debt instrument, maturity date

Mar. 15, 2019

Mar. 15, 2019

8.875% Second Lien Senior Secured Notes due 2018

Debt [Line Items]

Debt instrument, maturity date

Mar. 15, 2018

Debt instrument, principal amount

$ 75,000,000

$ 75,000,000

$ 75,000,000

Debt instrument interest rate

8.875%

8.875%

8.875%

Interest payment due date

Mar. 15, 2016

Warrant to purchase shares | shares

156.9

Common stock, par value | $ / shares

$ 0.20

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 8.875% Second Lien Notes shall be due on September 1, 2017

Warrant exercise price | $ / shares

$ 1

Warrant expiration period

10 years

Number of warrants to purchase common stock | shares

38,250

Debt instrument, covenant description

The 8.875% Second Lien Notes contain a number of covenants including restrictions on (i) the incurrence of indebtedness similar to the restrictions in the Company’s 8.875% Senior Notes due 2019, (ii) the incurrence of liens including prior liens securing indebtedness in an amount in excess of the greater of $150 million and the borrowing base under Senior Credit Facility, equally ranking liens securing indebtedness in an amount (including the 8.875% Second Lien Notes) of more than $75 million, and junior liens securing indebtedness in an amount of more than $50 million, and (iii) restricted payments including the purchase or repayment of unsecured indebtedness prior to its scheduled maturity.

Minimum amount of indebtedness on borrowings including prior liens

$ 150,000,000

$ 150,000,000

Minimum amount of indebtedness on borrowing base

75,000,000

75,000,000

Minimum amount of indebtedness on junior liens

50,000,000

50,000,000

Debt Instrument, Carrying Amount

91,364,000

91,364,000

Warrant issuance

$ 2,500,000

Debt instruments maturity date

2,018

8.875% Second Lien Senior Secured Notes due 2018 | Debt Instrument Redemption Period One

Debt [Line Items]

Debt instrument, principal amount

$ 36,800,000

Redeemable redemption price, percentage of principal amount

106.00%

Debt instrument, redemption date

Mar. 15, 2016

8.875% Second Lien Senior Secured Notes due 2018 | Debt Instrument Redemption Period Two

Debt [Line Items]

Debt instrument, principal amount

38,200,000

Redeemable redemption price, percentage of principal amount

100.00%

Debt instrument, redemption date

Mar. 15, 2017

8.875% Second Lien Senior Secured Notes due 2018 | Subsequent Event

Debt [Line Items]

Debt instrument interest rate

8.875%

8.875%

2019 Notes

Debt [Line Items]

Interest payment due date

Mar. 15, 2016

5.0% Convertible Senior Notes due 2029

Debt [Line Items]

Debt instrument, maturity date

Oct. 1, 2029

Debt instrument, principal amount

$ 6,692,000

[2]

$ 6,692,000

[2]

6,692,000

[2]

$ 218,500,000

Aggregate principal amount retired

$ 166,700,000

Debt instrument interest rate

5.00%

5.00%

Interest payment due date

Apr. 1, 2016

Debt discount amortization end date

Oct. 1, 2014

Debt Instrument, Carrying Amount

[2]

$ 6,692,000

$ 6,692,000

6,692,000

Debt Instrument, Repurchase Amount

$ 45,100,000

Notes to shares converted

28.8534

Principal amount of notes

$ 1,000

Base conversion price per share | $ / shares

$ 34.66

$ 34.66

Conversion price, percentage

135.00%

Number of trading days in the period

20 days

Period of amortization on debt instrument

5 years

Debt instruments maturity date

2,029

5.0% Senior Convertible Notes due 2032

Debt [Line Items]

Debt instrument, maturity date

Oct. 1, 2032

Debt instrument, principal amount

$ 8,500,000

$ 27,500,000

$ 57,000,000

$ 109,250,000

$ 98,664,000

[3]

$ 98,664,000

[3]

166,300,000

170,770,000

[3]

Aggregate principal amount retired

17,100,000

55,000,000

$ 72,100,000

Debt instrument interest rate

5.00%

5.00%

Interest payment due date

Apr. 1, 2016

Debt instrument, aggregate principal amount each unit

$ 1,000

$ 1,000

Fair value of debt portion

158,800,000

Debt discount

2,000,000

2,000,000

$ 7,500,000

5,300,000

Equity component of debt

$ 24,400,000

Debt discount amortization end date

Oct. 1, 2017

Debt Instrument, Carrying Amount

[3]

$ 96,694,000

$ 96,694,000

165,504,000

Notes to shares converted

28.8534

Base conversion price per share | $ / shares

$ 34.6580

$ 34.6580

Period of amortization on debt instrument

4 years

Aggregate principal amount outstanding excluding accretion

$ 94,200,000

$ 94,200,000

Debt instrument, accretion start date

Aug. 26, 2013

Debt instrument, accretion end date

Oct. 1, 2017

Redemption price, percentage

100.00%

Accretion amount

$ 3,000,000

Effective interest rate, debt instrument

8.00%

8.00%

Debt instruments maturity date

2,032

2,032

2,032

5.0% Senior Convertible Notes due 2032 | Debt Instrument Redemption Period One

Debt [Line Items]

Debt instrument, redemption date

Oct. 1, 2017

5.0% Senior Convertible Notes due 2032 | Debt Instrument Redemption Period Two

Debt [Line Items]

Debt instrument, redemption date

Oct. 1, 2022

5.0% Senior Convertible Notes due 2032 | Option 3

Debt [Line Items]

Debt instrument, redemption date

Oct. 1, 2027

5.0% Senior Convertible Notes due 2032 | Minimum

Debt [Line Items]

Debt instrument, redemption date

Oct. 1, 2016

Common stock trading price cap before conversion | $ / shares

$ 45.06

Conversion price percentage before conversion

130.00%

130.00%

5.0% Convertible Senior Exchange Notes due 2032

Debt [Line Items]

Debt instrument, principal amount

$ 8,500,000

$ 27,500,000

Debt instrument interest rate

5.00%

5.00%

Interest payment due date

Apr. 1, 2016

Principal amount of notes

$ 17,100,000

Debt instruments maturity date

2,032

2,032

2,032

5.0% Convertible Exchange Senior Notes due 2032

Debt [Line Items]

Debt instrument, maturity date

Oct. 1, 2032

Debt instrument, principal amount

$ 8,500,000

$ 27,500,000

$ 26,849,000

$ 26,849,000

$ 36,000,000

Debt instrument interest rate

5.00%

5.00%

Interest payment due date

Apr. 1, 2016

Debt instrument, aggregate principal amount each unit

$ 1,000

$ 1,000

Debt Instrument, Carrying Amount

42,625,000

$ 42,625,000

Notes to shares converted

500

Principal amount of notes

$ 17,100,000

$ 1,000

Base conversion price per share | $ / shares

$ 2

$ 2

Number of trading days in the period

20 days

Redemption price, percentage

100.00%

Effective interest rate, debt instrument

1.40%

1.30%

Debt instrument conversion term, description

If the holders elect to convert the 2032 Exchange Notes on or before October 1, 2018, holders will receive a make-whole premium equal to (i) $100 per $1,000 face amount of the 2032 Exchange Notes if the conversion occurs prior to October 1, 2017 or (ii) $100 per $1,000 face amount of the 2032 Exchange Notes less an amount equal to 0.2778 multiplied by the number of days between September 30, 2017 and the conversion date, if the conversion occurs on or after October 1, 2017.

Debt instrument, earlier conversion date

Oct. 1, 2017

Threshold trading price as percentage of conversion price

125.00%

Carrying amount of convertible notes

$ 14,800,000

$ 45,200,000

Net fair of the convert feature in additional paid in capital

$ 2,500,000

$ 10,100,000

5.0% Convertible Exchange Senior Notes due 2032 | Debt Instrument Redemption Period One

Debt [Line Items]

Debt instrument, redemption date

Oct. 1, 2018

Debt instrument conversion premium amount

10.00%

10.00%

5.0% Convertible Exchange Senior Notes due 2032 | Debt Instrument Redemption Period Two

Debt [Line Items]

Debt instrument, redemption date

Oct. 1, 2022

Debt instrument conversion premium amount

10.00%

10.00%

Incremental share factor

27.78%

5.0% Convertible Exchange Senior Notes due 2032 | Option 3

Debt [Line Items]

Debt instrument, redemption date

Oct. 1, 2027

3.25% Convertible Senior Notes due 2026

Debt [Line Items]

Debt instrument, principal amount

$ 429,000

$ 429,000

429,000

Debt instrument interest rate

3.25%

3.25%

Debt instrument, aggregate principal amount each unit

$ 1,000

$ 1,000

Debt Instrument, Carrying Amount

$ 429,000

$ 429,000

$ 429,000

Notes to shares converted

15.1653

Base conversion price per share | $ / shares

$ 65.94

$ 65.94

Incremental share factor

2.6762%

Debt instruments maturity date

2,026

3.25% Convertible Senior Notes due 2026 | Debt Instrument Redemption Period One

Debt [Line Items]

Debt instrument, redemption date

Dec. 1, 2016

3.25% Convertible Senior Notes due 2026 | Debt Instrument Redemption Period Two

Debt [Line Items]

Debt instrument, redemption date

Dec. 1, 2021

Senior Credit Facility

Debt [Line Items]

Senior credit facility, current borrowing capacity

$ 75,000,000

$ 75,000,000

Amount outstanding under the senior credit facility

27,000,000

$ 27,000,000

Senior credit facility, remaining borrowing capacity

$ 105,000,000

Senior Credit Facility | Subsequent Event

Debt [Line Items]

Senior credit facility, remaining borrowing capacity

$ 40,300,000

$ 47,000,000

Senior Credit Facility | Base Rate | Minimum

Debt [Line Items]

Debt instrument, interest rate over variable rate

1.25%

Senior Credit Facility | Base Rate | Maximum

Debt [Line Items]

Debt instrument, interest rate over variable rate

2.25%

Senior Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum

Debt [Line Items]

Debt instrument, interest rate over variable rate

2.25%

Senior Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum

Debt [Line Items]

Debt instrument, interest rate over variable rate

3.25%

Senior Credit Facility | 8.0% Second Lien Senior Secured Notes due 2018

Debt [Line Items]

Senior credit facility, remaining borrowing capacity

$ 150,000,000

$ 150,000,000

Debt instrument, principal amount

$ 100,000,000

Senior Credit Facility | 8.875% Senior Notes due 2019

Debt [Line Items]

Aggregate principal amount retired

158,200,000

Senior Credit Facility | 8.875% Second Lien Senior Secured Notes due 2018

Debt [Line Items]

Debt instrument, principal amount

$ 75,000,000

Debt instrument interest rate

8.875%

Senior Credit Facility | Third Lien Debt

Debt [Line Items]

Senior credit facility, remaining borrowing capacity

75,000,000

Senior Credit Facility | Thirteenth Amendment

Debt [Line Items]

Senior credit facility, remaining borrowing capacity

$ 200,000,000

Debt instrument, maturity date

Feb. 24, 2017

Senior Credit Facility | Fourteenth Amendment

Debt [Line Items]

Senior credit facility, remaining borrowing capacity

$ 75,000,000

Senior Credit Facility | Fourteenth Amendment | Third Lien Debt

Debt [Line Items]

Debt instrument, principal amount

$ 50,000,000

Senior Credit Facility | Fifteenth Amendment

Debt [Line Items]

Current Ratio

100.00%

Debt no greater than EBITDAX

125.00%

Senior Credit Facility | Fifteenth Amendment | Minimum

Debt [Line Items]

Interest Coverage Ratio Of EBITDAX

125.00%

Senior Credit Facility | Fifteenth Amendment | Maximum

Debt [Line Items]

Provision of a maximum cash balance

$ 15,000,000

Senior Credit Facility | Fifteenth Amendment | 8.0% Second Lien Senior Secured Notes due 2018

Debt [Line Items]

Debt instrument interest rate

8.00%

Senior Credit Facility | Fifteenth Amendment | 8.875% Second Lien Senior Secured Notes due 2018

Debt [Line Items]

Debt instrument interest rate

8.875%

Senior Credit Facility | Fifteenth Amendment | Third Lien Debt

Debt [Line Items]

Senior credit facility, current borrowing capacity

$ 75,000,000

Senior Credit Facility | Sixteen Amendment

Debt [Line Items]

Credit facility, borrowing capacity description

The Sixteenth Amendment includes the following key elements: (i) reduces total lender commitments to $40.3 million on March 29, 2016; (ii) the Company agrees not to request any borrowings, issue any new letters of credit or increase an existing letter of credit under the Senior Credit Facility before April 16, 2016; and (iii) requires that all letters of credit (except the letter of credit for the benefit of one specific vendor) expire at or prior to the earlier of (A) one year after the date of issuance or (B) five business days prior to February 24, 2017

Senior Credit Facility | Sixteen Amendment | Subsequent Event

Debt [Line Items]

Senior credit facility, remaining borrowing capacity

$ 40,300,000

[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 8.0% Second Lien Notes. The debt discount as of December 31, 2015 was $11.0 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 $2.0 million and $ 5.3 million as of December 31, 2015 and December 31, 2014, respectively.

Loss Per Common Share - Additio

Loss Per Common Share - Additional Information (Detail) $ in Millions	3 Months Ended
	Sep. 30, 2015USD ($)
Earnings Per Share [Abstract]
Preferred stock dividends suspended	$ 10.5

Computations of Basic and Dilut

Computations of Basic and Diluted Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Basic and Diluted loss per share:
Net loss applicable to common stock		$ (317,037)	$ (25,226)	$ (39,068)	$ (28,549)	$ (233,257)	$ (87,142)	$ (32,536)	$ (29,923)	$ (409,880)	$ (382,858)	$ (113,790)
Weighted-average shares of common stock outstanding										56,315	44,402	38,098
Basic and Diluted loss per share	[1],[2],[3]									$ (7.28)	$ (8.62)	$ (2.99)
[1]	Common shares issuable on assumed conversion of restricted stock, stock warrants and employee stock options were not included in the computation of diluted loss per common share since their inclusion would have been anti-dilutive.
[2]	Common shares issuable upon assumed conversion of convertible preferred stock or dividends paid were not presented as they would have been anti-dilutive.
[3]	Common shares issuable upon assumed conversion of the 2026 Notes, 2029 Notes, 2032 Notes and 2032 Exchange Notes or interest paid were not presented as they would have been anti-dilutive.

Computations of Basic and Dil48

Computations of Basic and Diluted Income (Loss) Per Share (Parenthetical) (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Assumed Conversion of Preferred Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common shares issuable upon assumed conversion	20,145	3,588	3,588
Assumed Conversion of Notes
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common shares issuable upon assumed conversion	15,728	4,997	6,307
Assumed Conversion of Restricted Stock, Stock Warrants and Employee Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common shares issuable upon assumed conversion	14,081	2,631	2,436

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Statutory income tax rate	35.00%	35.00%	35.00%
Deferred tax assets valuation allowance increase	$ 162
Deferred tax assets, net	162
Net operating loss carry-forwards	$ 824.6
Operating loss carryforwards, expiration dates	2,026
Tax credit carryforward, amount	$ 1.1

Reconciliation of Statutory Inc

Reconciliation of Statutory Income Tax Rate to Income Loss Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Tax at U.S. statutory income tax	$ 167,799	$ 123,597	$ 33,315
Valuation allowance	(185,698)	(122,032)	(30,967)
State income taxes-net of federal benefit	22,110	2,484	(902)
Nondeductible expenses and other	$ (4,211)	$ (4,049)	$ (1,446)

Schedule Of Deferred Tax (Liabi

Schedule Of Deferred Tax (Liabilities) Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Derivative financial instruments	$ 10
Contingent liabilities and other	130	$ 366
Compensation		1,307
Less: valuation allowance	(140)	(1,566)
Total current deferred tax assets		107
Derivative financial instruments		(16,569)
Accrued liabilities	(26)	(26)
Total current deferred tax liabilities	(26)	(16,595)
Net current deferred tax liability	(26)	(16,488)
Operating loss carry-forwards	286,441	256,240
State Tax NOL and Credits	12,383	7,974
Statutory depletion carry-forward	7,035	7,035
AMT tax credit carry-forward	1,052	1,114
Compensation	3,040	3,105
Contingent liabilities and other	523	522
Derivative financial instruments		162
Debt discount	17,652
Property and equipment	172,313	82,990
Total gross noncurrent deferred tax assets	500,439	359,142
Less valuation allowance	(500,308)	(336,841)
Net noncurrent deferred tax assets	131	22,301
Bond discount	(105)	(89)
Debt discount		(5,724)
Total non-current deferred tax liabilities	(105)	(5,813)
Net non-current deferred tax asset	$ 26	$ 16,488

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($)	Dec. 18, 2015	Mar. 10, 2015	Dec. 21, 2010	Dec. 31, 2015	Aug. 31, 2013	Apr. 30, 2013	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2006	Oct. 01, 2015
Stockholders Equity [Line Items]
Preferred stock dividend in arrears								$ 10,464,000
Net proceeds of preferred stock										$ 230,625,000
Common stock par value, per share				$ 0.20				$ 0.20	$ 0.20			$ 0.20
Preferred stock (return of) dividends								$ (69,544,000)	$ 29,722,000	18,604,000
Preferred stock dividends								(81,247,000)	$ 29,722,000	18,604,000
Preferred stock dividend payment timing difference								1,200,000
Common stock issued in public offering		12,000,000
Common stock, price		$ 4.15
Net proceeds from public offering of common stock		$ 47,500,000						$ 47,480,000		$ 166,149,000
Right to purchase common stock per warrant												156.9
Warrant exercise price												$ 1
Number of warrants to purchase common stock												38,250
Warrant expiration period								10 years
Common Stock
Stockholders Equity [Line Items]
Number of preferred stock sold								12,000,000		6,900,000
Shares issued to series E preferred stock holders				476,800
8.0% Second Lien Senior Secured Notes due 2018
Stockholders Equity [Line Items]
Detachable warrant issued, each unit				$ 1,000				$ 1,000
Right to purchase common stock per warrant				48.84				48.84
Warrant exercise price				$ 4.664				$ 4.664
Warrant expiration date								Mar. 12, 2025
Equity component of debt								$ 15,400,000
Warrant expiration period								10 years
8.875% Second Lien Senior Secured Notes due 2018
Stockholders Equity [Line Items]
Common stock par value, per share												$ 0.20
Right to purchase common stock per warrant												156.9
Warrant exercise price												$ 1
Number of warrants to purchase common stock												38,250
Warrant expiration period								10 years
5.0% Convertible Senior Exchange Notes due 2032
Stockholders Equity [Line Items]
Debt instrument, principal amount								$ 10,400,000
Carrying amount of convertible notes								$ 17,100,000
5.0% Convertible Senior Exchange Notes due 2032 | Common Stock
Stockholders Equity [Line Items]
Common stock, shares issued								5,200,000
Series B Cumulative Convertible Preferred Stock
Stockholders Equity [Line Items]
Preferred stock issued				1,491,459				1,491,459	2,250,000		2,250,000
Preferred stock, liquidation preference											$ 50
Aggregate preferred stock liquidation preference											$ 82,500,000
Preferred stock, dividend rate, percentage								5.375%			5.375%
Increase in dividend rate, percentage							1.00%				1.00%
Preferred Stock, Redemption Terms								Dividends are payable quarterly in arrears beginning March 15, 2006. If we fail to pay dividends on our Series B Preferred Stock on any six dividend payment dates, whether or not consecutive, the dividend rate per annum will be increased by 1.0% until we have paid all dividends on our Series B Preferred Stock for all dividend periods up to and including the dividend payment date on which the accumulated and unpaid dividends are paid in full.
Actual dividends payable date								Mar. 15, 2016
Convertible preferred stock shares exchanged	758,434
Preferred stock dividend in arrears								$ 2,000,000
Preferred stock conversion to number of common stock shares				1.5946				1.5946
Preferred stock conversion price				$ 31.36				$ 31.36
Consideration percentage in case of merger or consolidation								90.00%
Common stock closing price percentage			130.00%
Preferred stock issued				$ 1,491,000				$ 1,491,000	$ 2,250,000
Series B Cumulative Convertible Preferred Stock | Minimum
Stockholders Equity [Line Items]
Exercise of conversion right period			20 days
Series B Cumulative Convertible Preferred Stock | Maximum
Stockholders Equity [Line Items]
Exercise of conversion right period			30 days
Series E Cumulative Preferred Stock
Stockholders Equity [Line Items]
Preferred stock issued				3,553				3,553	0
Preferred stock, liquidation preference				$ 10				$ 10
Preferred stock, dividend rate, percentage								10.00%
Preferred Stock, Redemption Terms								Dividends on our Series E Preferred Stock are payable quarterly on March 15, June 15, September 15 and December 15 of each year, beginning on March 15, 2016, at such annual rate, and shall accumulate from the most recent date as to which dividends shall have been paid whether or not in any dividend period or periods there have been funds legally available for the payment of such dividends. Accumulations of dividends on shares of our Series E Preferred Stock will not bear interest.
Actual dividends payable date								Mar. 15, 2016
Preferred stock conversion to number of common stock shares				5				5
Preferred stock conversion price				$ 2				$ 2
Exercise of conversion right period								5 days
Common stock closing price percentage								150.00%
Preferred stock issued				$ 4,000				$ 4,000
Dividends equivalent, per annum per share				$ 1				$ 1
Preferred stock, dividend payment rate, variable								If we elect to make any such payment, or any portion thereof, in shares of common stock, such shares shall be valued for such purpose, in the case of any dividend payment, at 95% of the market value as determined on the second trading day immediately prior to the record date for such dividend; provided that in no event shall such shares be valued less than $0.70 per share for such purpose.
Percentage of dividend payment based on market value of stock on second trading day								95.00%
Preferred stock (return of) dividends								$ (95,800,000)
Common stock issued in public offering								3,648,803
Preferred stock conversion rights exercised, shares				95,000
Series E Cumulative Preferred Stock | Minimum
Stockholders Equity [Line Items]
Exercise of conversion right period								20 days
Preferred sock redemption date								Apr. 10, 2018
Series E Cumulative Preferred Stock | Maximum
Stockholders Equity [Line Items]
Exercise of conversion right period								30 days
Per share value for payment of dividend								$ 0.70
Preferred stock shares outstanding limit				50,000				50,000
Series C Cumulative Preferred Stock
Stockholders Equity [Line Items]
Preferred stock issued				3,125				3,125	4,400
Preferred stock, liquidation preference						$ 25,000
Preferred stock, dividend rate, percentage								10.00%
Preferred Stock, Redemption Terms								Holders of the Series C Preferred Stock have no voting rights except for limited voting rights if we fail to pay dividends for six or more quarterly periods (whether or not consecutive) and in certain other limited circumstances or as required by law.
Actual dividends payable date								Mar. 15, 2016
Convertible preferred stock shares exchanged	1,274,932
Preferred stock dividend in arrears								$ 3,900,000
Preferred stock conversion price				$ 25,000				$ 25,000
Preferred stock issued				$ 3,000		$ 110,000,000		$ 3,000	$ 4,000
Net proceeds of preferred stock						$ 105,400,000
Preferred share par value						$ 1
Series C Cumulative Preferred Stock | Minimum
Stockholders Equity [Line Items]
Preferred sock redemption date								Apr. 10, 2018
Series C Cumulative Preferred Stock | Maximum
Stockholders Equity [Line Items]
Maximum per share convertible rate				337154.00%				337154.00%
Depositary Shares
Stockholders Equity [Line Items]
Number of preferred stock sold	3,648,803				5,200,000	4,400,000
Percent of ownership interest held					0.001%	0.001%
American Depository Share
Stockholders Equity [Line Items]
Preferred stock, liquidation preference					$ 25	$ 25
Series D Cumulative Preferred Stock
Stockholders Equity [Line Items]
Preferred stock issued				3,736				3,736	5,200
Preferred stock, liquidation preference					$ 25,000
Preferred stock, dividend rate, percentage								9.75%
Preferred Stock, Redemption Terms								Holders of the Series D Preferred Stock have no voting rights except for limited voting rights if we fail to pay dividends for six or more quarterly periods (whether or not consecutive) and in certain other limited circumstances or as required by law.
Actual dividends payable date								Mar. 15, 2016
Convertible preferred stock shares exchanged	1,463,759
Preferred stock dividend in arrears								$ 4,600,000
Preferred stock conversion price				$ 25,000				$ 25,000
Preferred stock issued				$ 4,000	$ 130,000,000			$ 4,000	$ 5,000
Net proceeds of preferred stock					$ 124,900,000
Preferred share par value					$ 1
Series D Cumulative Preferred Stock | Minimum
Stockholders Equity [Line Items]
Preferred sock redemption date								Aug. 19, 2018
Series D Cumulative Preferred Stock | Maximum
Stockholders Equity [Line Items]
Maximum per share convertible rate				229779.00%				229779.00%
Conversion One | Series B Cumulative Convertible Preferred Stock
Stockholders Equity [Line Items]
Convertible preferred stock shares exchanged	758,434
Conversion One | Series E Cumulative Preferred Stock
Stockholders Equity [Line Items]
Convertible preferred stock shares exchanged	910,112
Conversion Two | Series E Cumulative Preferred Stock
Stockholders Equity [Line Items]
Convertible preferred stock shares exchanged	1,274,932
Conversion Two | Series C Cumulative Preferred Stock
Stockholders Equity [Line Items]
Convertible preferred stock shares exchanged	1,274,932
Conversion Three | Series E Cumulative Preferred Stock
Stockholders Equity [Line Items]
Convertible preferred stock shares exchanged	1,463,759
Conversion Three | Series D Cumulative Preferred Stock
Stockholders Equity [Line Items]
Convertible preferred stock shares exchanged	1,463,759

Stockholders' Equity - Componen

Stockholders' Equity - Components of Preferred Stock, Net (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Preferred stock, net:
Preferred stock dividends	$ 14,861	$ 29,722	$ 18,604
Preferred stock dividends in arrears	10,464
Preferred stock exchange	(94,869)
Preferred stock, net	$ (69,544)	$ 29,722	$ 18,604

Summary of Gains and Losses on

Summary of Gains and Losses on Derivatives (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Derivative [Line Items]
Gain (loss) on derivatives not designated as hedges	$ 7,367	$ 49,423	$ (702)
Commodity Derivatives
Derivative [Line Items]
Gain (loss) on derivatives not designated as hedges	$ 7,367	$ 49,423	$ (702)

Outstanding Commodity Derivativ

Outstanding Commodity Derivative Contracts (Detail) - Not Designated as Hedging Instrument $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)MMBTU / dMMBTU$ / MMBTU	Dec. 31, 2014USD ($)
Commodity Derivatives
Derivative [Line Items]
Fair Value | $	$ (30)	$ 46,878
Natural Gas Calls | 2016
Derivative [Line Items]
Daily Volume | MMBTU / d	20,000
Total Volume | MMBTU	7,320,000
Fair Value | $	$ (30)
Natural Gas Calls | Minimum | 2016
Derivative [Line Items]
Fixed price, calls | $ / MMBTU	5.05
Natural Gas Calls | Maximum | 2016
Derivative [Line Items]
Fixed price, calls | $ / MMBTU	5.06

Derivative Assets and Liabiliti

Derivative Assets and Liabilities Recorded at Fair Value (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Current Assets Commodity Derivatives		$ 47,444
Current Liabilities Commodity Derivatives	$ (30)	(102)
Non-current Liabilities Commodity Derivatives		(464)
Commodity Derivatives | Not Designated as Hedging Instrument
Derivative [Line Items]
Current Assets Commodity Derivatives		47,444
Current Liabilities Commodity Derivatives	(30)	(102)
Non-current Liabilities Commodity Derivatives		(464)
Total	(30)	46,878
Commodity Derivatives | Level 2 | Not Designated as Hedging Instrument
Derivative [Line Items]
Current Assets Commodity Derivatives		47,444
Current Liabilities Commodity Derivatives	(30)	(102)
Non-current Liabilities Commodity Derivatives		(464)
Total	$ (30)	$ 46,878

Reconciliation of Gross Amounts

Reconciliation of Gross Amounts to Amounts as Presented on Statements of Financial Position (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Derivative Current Asset		$ 47,444
Derivative Current Liability	$ (30)	(102)
Derivative Non-current Liability		(464)
Commodity Derivatives | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative Current Asset		47,444
Derivative Current Liability	(30)	(102)
Derivative Non-current Liability		(464)
Total	(30)	46,878
Commodity Derivatives | Gross Amount | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative Current Asset		47,444
Derivative Current Liability	(30)	(102)
Derivative Non-current Liability		(464)
Total	$ (30)	$ 46,878

Timing of Future Payments Oblig

Timing of Future Payments Obligations (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)
Commitment And Contingencies [Line Items]
Debt, Total	$ 429,468	[1]
Debt, 2016	429,468	[1]
Interest Expense, Debt, Total	76,725
Interest on convertible senior notes, 2016	31,363
Interest on convertible senior notes, 2017	30,941
Interest on convertible senior notes, 2018	11,984
Interest on convertible senior notes, 2019	2,437
Operations contracts, Total	8,193
Operations contracts, 2016	8,174
Operations contracts, 2017	19
Contractual Obligations, Total	521,029	[2]
Contractual Obligations, 2016	471,503	[2]
Contractual Obligations, 2017	32,467	[2]
Contractual Obligations, 2018	13,463	[2]
Contractual Obligations, 2019	3,596	[2]
Office Space Leases
Commitment And Contingencies [Line Items]
Total Lease future payments	5,449
Leases, 2016	1,381
Leases, 2017	1,430
Leases, 2018	1,479
Leases, 2019	1,159
Office Equipment Leases
Commitment And Contingencies [Line Items]
Total Lease future payments	194
Leases, 2016	117
Leases, 2017	77
Transportation Contracts
Commitment And Contingencies [Line Items]
Total Lease future payments	1,000
Leases, 2016	$ 1,000
[1]	As stated previously, all debt outstanding as of December 31, 2015 has been classified as a current liability. For additional information see Note 4—Debt. The holders of the 8.0% Second Lien Notes and 8.875% Second Lien Notes may requires us to repurchase the notes on September 1, 2017. The 2026 Notes have a provision at the end of years five, ten and 15, for the investors to demand payment on these dates; the first such date was December 1, 2011; all but the remaining $0.4 million have been redeemed. The next ‘put’ date for the remaining 2026 Notes is December 1, 2016. The 2029 Notes have a provision by which on or after October 1, 2014, we may redeem all or a portion of the notes for cash and the investors may require us to repurchase the notes on each of October 1, 2019 and 2024; all but the remaining $6.7 million were previously redeemed in 2014. The 2032 Notes have a provision by which on or after October 1, 2017, we may redeem all or a portion of the notes for cash, and the investors may require us to repurchase the notes on each of October 1, 2017, 2022 and 2027. The 2032 Exchange Notes have a provision whereby the investors may require us to repurchase the notes on each of October 1, 2018, 2022 and 2027.The balance outstanding under our Senior Credit Facility is not included as it is revolving debt. The future dates used herein are based on the assumption we will continue as a going concern.
[2]	This table does not include the estimated liability for dismantlement, abandonment and restoration costs of oil and natural gas properties of $3.7 million as of December 31, 2015. We record a separate liability for the asset retirement obligations. See Note 3.

Timing of Future Payments Obl59

Timing of Future Payments Obligations (Parenthetical) (Detail) - USD ($) $ in Thousands	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013	Sep. 30, 2009
Commitment And Contingencies [Line Items]
Debt instrument, principal amount	$ 451,462		$ 573,891
Liability for dismantlement, abandonment and restoration costs of oil and natural gas properties	3,728		6,510		$ 20,856
3.25% Convertible Senior Notes due 2026
Commitment And Contingencies [Line Items]
Amount retained by the company	400
Debt instrument, principal amount	429		429
5.0% Convertible Senior Notes due 2029
Commitment And Contingencies [Line Items]
Debt instrument, principal amount	$ 6,692	[1]	$ 6,692	[1]		$ 218,500
[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.

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) $ in Millions	Jun. 10, 2015USD ($)Shipment	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Commitments And Contingencies Disclosure [Abstract]
Rent expense		$ 1.5	$ 1.4	$ 1.3
Purchase obligation	$ 11.4	$ 6.8
Purchase obligation agreement, period	18 months
Purchase obligation terms		We will receive and pay for approximately $0.6 million of pipe each month during the term of the agreement. Our obligation may be reduced subject to the vendor identifying an opportunity to sell the pipe to the open market.
Purchase obligation of material for each month	$ 0.6
Number of shipments delivery taken | Shipment	7
Charge to expense plan		$ 0.5	$ 0.6	$ 0.7

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions	May. 31, 2015	Dec. 31, 2014
Board of Directors Chairman
Related Party Transaction [Line Items]
Share of monthly capital and operating costs		$ 0.1
Billings to related parties	$ 0.3	0.4
Revenue distributions	0.1	0.5
Malloy Energy Company LLC
Related Party Transaction [Line Items]
Share of monthly capital and operating costs		0.3
Billings to related parties	0.2	1.2
Revenue distributions	$ 0.2	$ 1.2

Dispositions and Acquisitions -

Dispositions and Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 04, 2015	Sep. 30, 2015	Sep. 04, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net proceeds from sale of asset				$ 113,533	$ 53,932	$ 449
Gain on sale of asset				$ 53,451	$ (3,499)	$ 107
Eagle Ford Shale Trend
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Purchase and sell agreement amount	$ 118,000
Net proceeds from sale of asset		$ 110,000	$ 110,000
Business acquisition, effective date of acquisition				Jul. 1, 2015
Gain on sale of asset				$ 49,700

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - USD ($) $ in Millions	Mar. 15, 2016	Jan. 26, 2016	Dec. 31, 2015	Mar. 31, 2016	Oct. 01, 2015	Dec. 31, 2014	Mar. 02, 2011
Subsequent Event [Line Items]
Common stock, shares authorized			150,000,000			150,000,000
Interest payment grace period			30 days
Scenario Forecast | Recapitalization, Change in Capital Structure
Subsequent Event [Line Items]
Common stock, shares authorized				400,000,000
8.875% Senior Notes due 2019
Subsequent Event [Line Items]
Debt instrument interest rate			8.875%				8.875%
Debt instrument, maturity date			Mar. 15, 2019
Interest payment due date			Mar. 15, 2016
8.0% Second Lien Senior Secured Notes due 2018
Subsequent Event [Line Items]
Debt instrument interest rate			8.00%
Debt instrument, maturity date			Mar. 15, 2018
Interest payment due date			Mar. 15, 2016
8.875% Second Lien Senior Secured Notes due 2018
Subsequent Event [Line Items]
Debt instrument interest rate			8.875%		8.875%
Debt instrument, maturity date			Mar. 15, 2018
Interest payment due date			Mar. 15, 2016
Subsequent Event
Subsequent Event [Line Items]
Interest payment grace period	30 days
Interest payment due date	Mar. 15, 2016
Subsequent Event | 8.875% Senior Notes due 2019
Subsequent Event [Line Items]
Debt instrument, maturity date	Mar. 15, 2019	Mar. 15, 2019
Interest payment due	$ 5.2
Subsequent Event | 8.0% Second Lien Senior Secured Notes due 2018
Subsequent Event [Line Items]
Debt instrument interest rate	8.00%	8.00%
Interest payment due	$ 4
Subsequent Event | 8.875% Second Lien Senior Secured Notes due 2018
Subsequent Event [Line Items]
Debt instrument interest rate	8.875%	8.875%
Interest payment due	$ 3.3

Summarized Quarterly Financia64

Summarized Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 9,790	$ 17,729	$ 26,101	$ 24,030	$ 48,557	$ 54,874	$ 53,319	$ 51,803	$ 77,650	$ 208,553	$ 203,295
Operating income (loss)	(460,096)	(10,095)	(10,879)	(13,469)	(261,725)	(87,420)	(3,552)	(2,123)	(494,539)	(354,820)	(36,310)
Net income (loss)	(408,872)	(17,796)	(31,638)	(21,118)	(225,827)	(79,711)	(25,106)	(22,492)	(479,424)	(353,136)	(95,186)
Net income (loss) applicable to common stock	$ (317,037)	$ (25,226)	$ (39,068)	$ (28,549)	$ (233,257)	$ (87,142)	$ (32,536)	$ (29,923)	$ (409,880)	$ (382,858)	$ (113,790)
Basic income (loss) per common share	$ (5.19)	$ (0.44)	$ (0.68)	$ (0.58)	$ (5.23)	$ (1.96)	$ (0.73)	$ (0.68)	$ (7.28)	$ (8.62)	$ (2.99)
Diluted income (loss) per common share	$ (5.19)	$ (0.44)	$ (0.68)	$ (0.58)	$ (5.23)	$ (1.96)	$ (0.73)	$ (0.68)	$ (7.28)	$ (8.62)	$ (2.99)