Gulfport Energy (GPOR) 10-Q 7 Aug 15 2015 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2015	Aug. 03, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2015
Entity Registrant Name	GULFPORT ENERGY CORP
Entity Central Index Key	874,499
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2,015
Entity Filer Category	Large Accelerated Filer
Document Fiscal Period Focus	Q2
Entity Common Stock, Shares Outstanding		108,210,444

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 525,488	$ 142,340
Restricted cash	75,005	0
Accounts receivable—oil and gas	86,621	103,858
Accounts receivable—related parties	90	46
Prepaid expenses and other current assets	15,168	3,714
Short-term derivative instruments	77,350	78,391
Total current assets	779,722	328,349
Property and equipment:
Oil and natural gas properties, full-cost accounting, $1,797,025 and $1,465,538 excluded from amortization in 2015 and 2014, respectively	4,798,835	3,923,154
Other property and equipment	22,930	18,344
Accumulated depletion, depreciation, amortization and impairment	(1,211,308)	(1,050,879)
Property and equipment, net	3,610,457	2,890,619
Other assets:
Equity investments	362,391	369,581
Derivative instruments	25,871	24,448
Other assets	25,418	19,396
Total other assets	413,680	413,425
Total assets	4,803,859	3,632,393
Current liabilities:
Accounts payable and accrued liabilities	318,725	371,410
Asset retirement obligation—current	75	75
Deferred tax liability	26,508	27,070
Short-term derivative instruments	937
Current maturities of long-term debt	1,738	168
Total current liabilities	347,983	398,723
Long-term derivative instrument	2,753	0
Asset retirement obligation—long-term	21,202	17,863
Deferred tax liability	201,022	203,195
Long-term debt, net of current maturities	963,593	716,316
Total liabilities	$ 1,536,553	$ 1,336,097
Commitments and contingencies (Note 9)
Preferred stock, $.01 par value; 5,000,000 authorized, 30,000 authorized as redeemable 12% cumulative preferred stock, Series A; 0 issued and outstanding	$ 0	$ 0
Stockholders’ equity:
Common stock - $.01 par value, 200,000,000 authorized, 108,203,981 issued and outstanding at June 30, 2015 and 85,655,438 at December 31, 2014	1,081	856
Paid-in capital	2,816,930	1,828,602
Accumulated other comprehensive loss	(38,412)	(26,675)
Retained earnings	487,707	493,513
Total stockholders’ equity	3,267,306	2,296,296
Total liabilities and stockholders’ equity	$ 4,803,859	$ 3,632,393

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Capitalized costs of oil and natural gas properties excluded from amortization	$ 1,797,025	$ 1,465,538
Preferred stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (shares)	5,000,000	5,000,000
Preferred stock dividend rate	12.00%	12.00%
Temporary Equity, Shares Authorized (shares)	30,000	30,000
Preferred stock Series A, issued (shares)	0	0
Preferred stock Series A, outstanding (shares)	0	0
Common stock, par value (usd per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized (shares)	200,000,000	200,000,000
Common Stock, Shares, Issued (shares)	108,203,981	85,655,438
Common Stock, Shares, Outstanding (shares)	108,203,981	85,655,438

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues:
Gas sales	$ 65,871	$ 35,522	$ 184,441	$ 53,871
Oil and condensate sales	34,465	68,078	69,965	141,455
Natural gas liquid sales	11,958	10,897	33,965	37,033
Other (expense) income	(24)	239	216	406
Total revenues	112,270	114,736	288,587	232,765
Costs and expenses:
Lease operating expenses	16,863	12,680	33,843	24,309
Production taxes	3,285	6,601	7,570	13,558
Midstream gathering and processing	32,904	10,780	58,285	18,549
Depreciation, depletion and amortization	71,155	55,994	161,064	112,871
General and administrative	9,515	10,382	20,314	19,893
Accretion expense	192	189	382	377
Gain on sale of assets	0	0	0	(11)
Total costs and expenses	133,914	96,626	281,458	189,546
(LOSS) INCOME FROM OPERATIONS	(21,644)	18,110	7,129	43,219
OTHER (INCOME) EXPENSE:
Interest expense	12,023	2,402	20,782	6,287
Interest income	(248)	(36)	(257)	(142)
Litigation settlement	0	6,000	0	24,000
Loss (income) from equity method investments	15,120	(69,569)	(4,855)	(198,044)
Total Other (Income) Expense	26,895	(61,203)	15,670	(167,899)
(LOSS) INCOME BEFORE INCOME TAXES	(48,539)	79,313	(8,541)	211,118
INCOME TAX (BENEFIT) EXPENSE	(17,214)	31,461	(2,735)	80,708
NET (LOSS) INCOME	$ (31,325)	$ 47,852	$ (5,806)	$ 130,410
NET (LOSS) INCOME PER COMMON SHARE:
Basic net income per share (in usd per share)	$ (0.32)	$ 0.56	$ (0.06)	$ 1.53
Diluted net income per share (in usd per share)	$ (0.32)	$ 0.56	$ (0.06)	$ 1.52
Weighted average common shares outstanding - Basic (shares)	96,663,358	85,448,678	91,201,824	85,354,566
Weighted average common shares outstanding-Diluted (shares)	96,663,358	85,805,896	91,201,824	85,766,679

Consolidated Statements of Comp

Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (31,325)	$ 47,852	$ (5,806)	$ 130,410
Foreign currency translation adjustment	3,247	6,816	(11,737)	(462)
Other comprehensive income (loss)	3,247	6,816	(11,737)	(462)
Comprehensive (loss) income	$ (28,078)	$ 54,668	$ (17,543)	$ 129,948

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Paid-In Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]
Beginning Balance (in shares) at Dec. 31, 2013		85,177,532
Beginning Balance at Dec. 31, 2013	$ 2,050,238	$ 851	$ 1,813,058	$ (9,781)	$ 246,110
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	130,410				130,410
Other Comprehensive Loss	(462)			(462)
Stock Compensation	7,665		7,665
Issuance of Restricted Stock (in shares)		124,526
Issuance of Restricted Stock	0	$ 1	(1)
Issuance of Common Stock through exercise of options (in shares)		192,908
Issuance of Common Stock through exercise of options	648	$ 2	646
Ending Balance (in shares) at Jun. 30, 2014		85,494,966
Ending Balance at Jun. 30, 2014	$ 2,188,499	$ 854	1,821,368	(10,243)	376,520
Beginning Balance (in shares) at Dec. 31, 2014	85,655,438	85,655,438
Beginning Balance at Dec. 31, 2014	$ 2,296,296	$ 856	1,828,602	(26,675)	493,513
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(5,806)				(5,806)
Other Comprehensive Loss	(11,737)			(11,737)
Stock Compensation	6,735		6,735
Issuance of Common Stock in public offerings, net of related expenses (in shares)		22,425,000
Issuance of Common Stock in public offerings, net of related expenses	981,818	$ 224	981,594
Issuance of Restricted Stock (in shares)		123,543
Issuance of Restricted Stock	$ 0	$ 1	(1)
Issuance of Common Stock through exercise of options (in shares)	0
Ending Balance (in shares) at Jun. 30, 2015	108,203,981	108,203,981
Ending Balance at Jun. 30, 2015	$ 3,267,306	$ 1,081	$ 2,816,930	$ (38,412)	$ 487,707

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net (loss) income	$ (5,806)	$ 130,410
Adjustments to reconcile net income to net cash provided by operating activities:
Accretion of discount—Asset Retirement Obligation	382	377
Depletion, depreciation and amortization	161,064	112,871
Stock-based compensation expense	4,041	4,599
Loss (gain) from equity investments	2,171	(113,257)
Interest income - note receivable		(25)
Unrealized loss on derivative instruments	3,309	6,433
Deferred income tax (benefit) expense	(2,735)	55,550
Amortization of loan commitment fees	1,416	637
Amortization of note discount and premium	(1,065)	158
Changes in operating assets and liabilities:
Decrease (increase) in accounts receivable	17,237	(48,631)
(Increase) decrease in accounts receivable—related party	(44)	2,490
Increase in prepaid expenses	(11,454)	(994)
(Decrease) increase in accounts payable and accrued liabilities	(28,522)	53,988
Settlement of asset retirement obligation	(1,120)	(3,097)
Net cash provided by operating activities	138,874	201,509
Cash flows from investing activities:
Deductions to cash held in escrow	8	8
Additions to other property and equipment	(4,154)	(1,759)
Additions to oil and gas properties	(898,639)	(672,967)
Proceeds from sale of oil and gas properties	1,679	0
Proceeds from sale of investments	0	89,120
Deductions to cash held in escrow	(75,005)	0
Contributions to equity method investments	(8,267)	(39,162)
Distributions from equity method investments	4,612	0
Net cash used in investing activities	(979,766)	(624,760)
Cash flows from financing activities:
Principal payments on borrowings	(350,088)	(85)
Borrowings on line of credit	250,000	40,000
Proceeds from bond issuance	350,000	0
Debt issuance costs and loan commitment fees	(7,738)	(975)
Proceeds from issuance of common stock, net of offering costs and exercise of stock options	981,866	648
Net cash provided by financing activities	1,224,040	39,588
Net increase (decrease) in cash and cash equivalents	383,148	(383,663)
Cash and cash equivalents at beginning of period	142,340	458,956
Cash and cash equivalents at end of period	525,488	75,293
Supplemental disclosure of cash flow information:
Interest payments	24,176	11,738
Income tax payments	29,753	16,700
Supplemental disclosure of non-cash transactions:
Capitalized stock based compensation	2,694	3,066
Asset retirement obligation capitalized	4,077	3,613
Interest capitalized	8,399	6,245
Foreign currency translation loss on investment in Grizzly Oil Sands ULC	$ (11,737)	$ (462)

Acquisitions

Acquisitions	6 Months Ended
	Jun. 30, 2015
Business Combinations [Abstract]
Acquisitions	ACQUISITIONS In February 2014, the Company entered into a definitive agreement with Rhino Exploration LLC ("Rhino") to acquire additional oil and natural gas properties consisting of approximately 8,000 net acres in the Utica Shale, as well as Rhino's interest in all of the producing wells on this acreage (the "Rhino Acquisition"). The Company purchased approximately $182.0 million ( $179.5 million net of purchase price adjustments) of these assets in 2014. The Rhino Acquisition qualified as a business combination for accounting purposes and, as such, the Company estimated the fair value of the acquired properties as of the March 20, 2014 acquisition date. The fair value of the assets and liabilities acquired was estimated using assumptions that represent Level 3 inputs. See Note 10 - "Fair Value Measurements" for additional discussion of the measurement inputs. The Company estimated that the consideration paid in the Rhino Acquisition for these properties approximated the fair value that would be paid by a typical market participant. As a result, no goodwill or bargain purchase gain was recognized in conjunction with the purchase. The following table summarizes the consideration paid in the Rhino Acquisition to acquire the properties and the fair value amount of the assets acquired as of March 20, 2014. (In thousands) Consideration paid Cash, net of purchase price adjustments $ 179,527 Fair value of identifiable assets acquired Oil and natural gas properties Proved $ 31,961 Unproved 6,263 Unevaluated 141,303 Fair value of net identifiable assets acquired $ 179,527 In April 2015, the Company entered into an agreement to acquire Paloma Partners III, LLC ("Paloma") for a total purchase price of approximately $301.3 million , subject to closing adjustments. Paloma holds approximately 24,000 net nonproducing acres in the Utica Shale of Ohio. This transaction is expected to close during the third quarter of 2015, subject to the satisfaction of certain closing conditions. In accordance with the agreement, the Company deposited $75.0 million into an escrow account. At the closing of the transaction the deposit shall be credited toward the purchase price. This deposit is shown as restricted cash on the accompanying consolidated balance sheets at June 30, 2015 . On June 9, 2015, the Company completed the acquisition of 6,198 gross and net acres located in Belmont and Jefferson Counties, Ohio from American Energy-Utica, LLC ("AEU") for a purchase price of approximately $68.2 million , subject to adjustment. On June 12, 2015, the Company completed the acquisition of 38,965 gross ( 27,228 net) acres located in Monroe County, Ohio, 14.6 MMcf per day of average net production (estimated for April 2015), 18 gross ( 11.3 net) drilled but uncompleted wells, an 11 mile gas gathering system and a four well pad location from AEU for a total purchase price of approximately $319.0 million (the "Monroe Acquisition"). On June 29, 2015, the Company acquired an additional 4,950 gross ( 1,900 net) acres in Monroe County for an additional $18.2 million from AEU. The total purchase price of these transactions, collectively referred to as the ("AEU Acquisition"), was approximately $405.4 million ( $405.0 million net of purchase price adjustments). The AEU Acquisition qualified as a business combination for accounting purposes and, as such, the Company estimated the fair value of the acquired properties as of the June 12, 2015 acquisition date. The fair value of the assets and liabilities acquired was estimated using assumptions that represent Level 3 inputs. See Note 11 - "Fair Value Measurements" for additional discussion of the measurement inputs. The Company estimated that the consideration paid in the AEU Acquisition for these properties approximated the fair value that would be paid by a typical market participant. As a result, no goodwill or bargain purchase gain was recognized in conjunction with the purchase. The following table summarizes the consideration paid in the AEU Acquisition to acquire the properties and the fair value amount of the assets acquired as of June 12, 2015. Both the consideration paid and the fair value assigned to the assets is preliminary and subject to adjustment upon final closing. (In thousands) Consideration paid Cash, net of purchase price adjustments $ 405,029 Fair value of identifiable assets acquired Oil and natural gas properties Proved $ 70,804 Unevaluated 334,225 Fair value of net identifiable assets acquired $ 405,029

Property And Equipment

Property And Equipment	6 Months Ended
	Jun. 30, 2015
Property, Plant and Equipment [Abstract]
Property And Equipment	PROPERTY AND EQUIPMENT The major categories of property and equipment and related accumulated depletion, depreciation, amortization and impairment as of June 30, 2015 and December 31, 2014 are as follows: June 30, 2015 December 31, 2014 (In thousands) Oil and natural gas properties $ 4,798,835 $ 3,923,154 Office furniture and fixtures 11,430 10,752 Building 7,833 5,398 Land 3,667 2,194 Total property and equipment 4,821,765 3,941,498 Accumulated depletion, depreciation, amortization and impairment (1,211,308 ) (1,050,879 ) Property and equipment, net $ 3,610,457 $ 2,890,619 Included in oil and natural gas properties at June 30, 2015 is the cumulative capitalization of $86.2 million in general and administrative costs incurred and capitalized to the full cost pool. General and administrative costs capitalized to the full cost pool represent management’s estimate of costs incurred directly related to exploration and development activities such as geological and other administrative costs associated with overseeing the exploration and development activities. All general and administrative costs not directly associated with exploration and development activities were charged to expense as they were incurred. Capitalized general and administrative costs were approximately $ 6.3 million and $ 13.5 million for the three and six months ended June 30, 2015 , respectively, and $6.9 million and $13.2 million for the three and six months ended June 30, 2014 , respectively. The following table summarizes the Company’s non-producing properties excluded from amortization by area at June 30, 2015 : June 30, 2015 (In thousands) Colorado $ 5,083 Bakken 96 Southern Louisiana 263 Ohio 1,791,538 Other 45 $ 1,797,025 At December 31, 2014 , approximately $1.5 billion of non-producing leasehold costs was not subject to amortization. The Company evaluates the costs excluded from its amortization calculation at least annually. Subject to industry conditions and the level of the Company’s activities, the inclusion of most of the above referenced costs into the Company’s amortization calculation is expected to occur within three to five years. The Company performs a ceiling test each quarter. If prices of oil, natural gas and natural gas liquids continue to decline and are not adequately offset by reserve additions from the Company's drilling activities, the Company may be required to write down the value of its oil and gas properties, which could negatively affect its results of operations. No ceiling test impairment was required for the quarter ended June 30, 2015 . A reconciliation of the Company's asset retirement obligation for the six months ended June 30, 2015 and 2014 is as follows: June 30, 2015 June 30, 2014 (In thousands) Asset retirement obligation, beginning of period $ 17,938 $ 15,083 Liabilities incurred 4,077 3,613 Liabilities settled (1,120 ) (3,097 ) Accretion expense 382 377 Asset retirement obligation as of end of period 21,277 15,976 Less current portion 75 795 Asset retirement obligation, long-term $ 21,202 $ 15,181 On May 7, 2012, the Company entered into a contribution agreement with Diamondback Energy Inc. ("Diamondback"). Under the terms of the contribution agreement, the Company agreed to contribute to Diamondback, prior to the closing of the Diamondback initial public offering (“Diamondback IPO”), all its oil and natural gas interests in the Permian Basin (the "Contribution"). The Contribution was completed on October 11, 2012. At the closing of the Contribution, Diamondback issued to the Company (i) 7,914,036 shares of Diamondback common stock and (ii) a promissory note for $ 63.6 million , which was repaid to the Company at the closing of the Diamondback IPO on October 17, 2012. This aggregate consideration was subject to a post-closing cash adjustment based on changes in the working capital, long-term debt and certain other items of Diamondback O&G LLC, formerly Windsor Permian LLC ("Diamondback O&G"), as of the date of the Contribution. In January 2013, the Company received an additional payment from Diamondback of approximately $18.6 million as a result of this post-closing adjustment. Diamondback O&G is a wholly-owned subsidiary of Diamondback. Under the contribution agreement, the Company is generally responsible for all liabilities and obligations with respect to the contributed properties arising prior to the Contribution and Diamondback is responsible for such liabilities and obligations with respect to the contributed properties arising after the Contribution. Immediately upon completion of the Contribution, the Company owned a 35% equity interest in Diamondback, rather than leasehold interests in the Company’s Permian Basin acreage. Upon completion of the Diamondback IPO in October 2012, Gulfport owned approximately 21.4% of Diamondback's outstanding common stock. Following the Contribution, the Company has accounted for its interest in Diamondback as an equity investment. In November 2014, the Company sold all of the remaining shares of Diamondback common stock that it received in the Contribution and, as of June 30, 2015 , Gulfport did not own any shares of Diamondback's common stock. See Note 3, "Equity Investments - Diamondback Energy, Inc ."

Equity Investments

Equity Investments	6 Months Ended
	Jun. 30, 2015
Equity Method Investments and Joint Ventures [Abstract]
Equity Investments	EQUITY INVESTMENTS Investments accounted for by the equity method consist of the following as of June 30, 2015 and December 31, 2014 : Carrying Value (Income) loss from equity method investments Approximate Ownership % June 30, 2015 December 31, 2014 Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 (In thousands) Investment in Tatex Thailand II, LLC 23.5 % $ — $ — $ — $ — $ — $ — Investment in Tatex Thailand III, LLC 17.9 % — — 189 121 189 170 Investment in Grizzly Oil Sands ULC 24.9999 % 164,113 180,218 8,494 2,228 12,636 4,229 Investment in Bison Drilling and Field Services LLC — % — — — (329 ) — 1,604 Investment in Muskie Proppant LLC — % — — — (101 ) — 433 Investment in Timber Wolf Terminals LLC 50.0 % 1,000 1,013 7 — 13 — Investment in Windsor Midstream LLC 22.5 % 27,766 13,505 881 (35 ) (17,906 ) (203 ) Investment in Stingray Pressure Pumping LLC — % — — — 1,630 — 2,143 Investment in Stingray Cementing LLC 50.0 % 2,002 2,647 105 106 172 201 Investment in Blackhawk Midstream LLC 48.5 % — — — — (7,217 ) (84,787 ) Investment in Stingray Logistics LLC — % — — — (238 ) — (157 ) Investment in Diamondback Energy, Inc. — % — — — (72,945 ) — (121,712 ) Investment in Stingray Energy Services LLC 50.0 % 5,905 5,718 311 (6 ) 321 35 Investment in Sturgeon Acquisitions LLC 25.0 % 22,599 22,507 (491 ) — (1,059 ) — Investment in Mammoth Energy Partners LP 30.5 % 139,006 143,973 5,624 — 7,996 — $ 362,391 $ 369,581 $ 15,120 $ (69,569 ) $ (4,855 ) $ (198,044 ) The tables below summarize financial information for the Company's equity investments as of June 30, 2015 and December 31, 2014 . Summarized balance sheet information: June 30, 2015 December 31, 2014 (In thousands) Current assets $ 170,637 $ 181,060 Noncurrent assets $ 1,414,991 $ 1,306,891 Current liabilities $ 96,004 $ 114,506 Noncurrent liabilities $ 208,319 $ 230,062 Summarized results of operations: Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 (In thousands) Gross revenue $ 130,134 $ 220,013 $ 263,690 $ 378,294 Net (loss) income $ (45,246 ) $ 26,099 $ 45,422 $ 207,604 Tatex Thailand II, LLC The Company has an indirect ownership interest in Tatex Thailand II, LLC (“Tatex”). Tatex holds 85,122 of the 1,000,000 outstanding shares of APICO, LLC (“APICO”), an international oil and gas exploration company. APICO has a reserve base located in Southeast Asia through its ownership of concessions covering approximately 243,000 acres which includes the Phu Horm Field. Tatex Thailand III, LLC The Company has an ownership interest in Tatex Thailand III, LLC ("Tatex III"). Tatex III previously owned a concession covering approximately 245,000 acres in Southeast Asia. As of December 31, 2014, the Company reviewed its investment in Tatex III and made the decision to allow the concession to expire in 2015. As such, the Company fully impaired the asset as of December 31, 2014. The concession expired in January 2015. Gulfport recorded $0.2 million of expense relating to its investment in Tatex III during the six months ended June 30, 2015 . Grizzly Oil Sands ULC The Company, through its wholly owned subsidiary Grizzly Holdings Inc. ("Grizzly Holdings"), owns an interest in Grizzly Oil Sands ULC ("Grizzly"), a Canadian unlimited liability company. The remaining interest in Grizzly is owned by Grizzly Oil Sands Inc. ("Oil Sands"). As of June 30, 2015 , Grizzly had approximately 830,000 acres under lease in the Athabasca and Peace River oil sands regions of Alberta, Canada. Initiation of steam injection at its first project, Algar Lake Phase 1, commenced in January 2014 and first bitumen production was achieved during the second quarter of 2014. In April 2015, Grizzly determined to cease bitumen production at its Algar Lake facility due to the level of commodity prices. Grizzly intends to monitor market conditions as it assesses future plans for the facility. The Company reviewed its investment in Grizzly at June 30, 2015 and determined no impairment was needed. If commodity prices continue to decline, an impairment of the investment in Grizzly may result in the future. During the six months ended June 30, 2015 , Gulfport paid $ 8.3 million in cash calls. Grizzly’s functional currency is the Canadian dollar. The Company's investment in Grizzly was increased by $3.2 million as a result of a foreign currency translation gain and decreased by $11.7 million as a result of a foreign currency translation loss for the three and six months ended June 30, 2015 , respectively. The Company's investment in Grizzly was increased by $6.8 million as a result of a foreign currency translation gain and decreased by $0.5 million as a result of a foreign currency translation loss for the three and six months ended June 30, 2014 , respectively. Bison Drilling and Field Services LLC During 2011 , the Company invested in Bison Drilling and Field Services LLC (“Bison”). Bison owns and operates drilling rigs. The Company contributed its investment in Bison to Mammoth Energy Partners LP ("Mammoth") during the fourth quarter of 2014. See below under "- Mammoth Energy Partners LP " for a discussion of the contribution. Muskie Proppant LLC During 2011 , the Company invested in Muskie Proppant LLC (“Muskie”). Muskie processes and sells sand for use in hydraulic fracturing by the oil and natural gas industry and holds certain rights in a lease covering land in Wisconsin for mining oil and natural gas fracture grade sand. The (income) loss from equity method investments presented in the table above reflects any intercompany profit eliminations. The Company contributed its investment in Muskie to Mammoth during the fourth quarter of 2014. See below under "- Mammoth Energy Partners LP " for a discussion of the contribution. Timber Wolf Terminals LLC During 2012, the Company invested in Timber Wolf Terminals LLC (“Timber Wolf”). Timber Wolf will operate a crude/condensate terminal and a sand transloading facility in Ohio. During the six months ended June 30, 2015 , Gulfport did not pay any cash calls related to Timber Wolf. Windsor Midstream LLC During 2012, the Company purchased an ownership interest in Windsor Midstream LLC (“Midstream”). Midstream owned a 28.4% interest in Coronado Midstream LLC ("Coronado"), a gas processing plant in West Texas. In March 2015, Coronado was sold to Enlink Midstream Partners, LP ("EnLink") for proceeds of approximately $600.0 million , consisting of cash and units representing a limited partnership interest in Enlink. Midstream recorded an $ 81.6 million gain on the sale of its investment in Coronado. As a result of the sale, Gulfport received $3.6 million in distributions from Midstream during the six months ended June 30, 2015 . Stingray Pressure Pumping LLC During 2012, the Company invested in Stingray Pressure Pumping LLC ("Stingray Pressure"). Stingray Pressure provides well completion services. The (income) loss from equity method investments presented in the table above reflects any intercompany profit eliminations. The Company contributed its investment in Stingray Pressure to Mammoth during the fourth quarter of 2014. See below under "- Mammoth Energy Partners LP " for a discussion of the contribution. Stingray Cementing LLC During 2012, the Company invested in Stingray Cementing LLC ("Stingray Cementing"). Stingray Cementing provides well cementing services. During the six months ended June 30, 2015 , the Company did not pay any cash calls related to Stingray Cementing. The (income) loss from equity method investments presented in the table above reflects any intercompany profit eliminations. Blackhawk Midstream LLC During 2012, the Company invested in Blackhawk Midstream LLC ("Blackhawk"). Blackhawk coordinates gathering, compression, processing and marketing activities for the Company in connection with the development of its Utica Shale acreage. On January 28, 2014, Blackhawk closed on the sale of its equity interests in Ohio Gathering Company, LLC and Ohio Condensate Company, LLC for a purchase price of $190.0 million , of which $14.3 million was placed in escrow. Gulfport received $84.8 million in net proceeds from this transaction in the first quarter of 2014, which is included in income from equity method investments in the consolidated statements of operations. During the first quarter of 2015, the Company received net proceeds of approximately $7.2 million from the release of escrow from the Blackhawk sale, which is included in loss (income) from equity method investments in the consolidated statements of operations. Stingray Logistics LLC During 2012, the Company invested in Stingray Logistics LLC ("Stingray Logistics"). Stingray Logistics provides well services. The Company contributed its investment in Stingray Logistics to Mammoth during the fourth quarter of 2014. See below under "- Mammoth Energy Partners LP " for a discussion of the contribution. Diamondback Energy, Inc. As noted above in Note 2, on October 11, 2012, following the closing of the Diamondback IPO, the Company owned 7,914,036 shares of Diamondback's outstanding common stock for an initial investment in Diamondback valued at $ 138.5 million . In 2013, the Company sold an aggregate of 4,534,536 shares of its Diamondback common stock and received aggregate net proceeds of approximately $192.7 million . In June and September of 2014, the Company sold 1,000,000 and 1,437,500 shares of its Diamondback common stock, respectively, and received aggregate net proceeds of approximately $197.6 million . On November 12, 2014, the Company sold its remaining 942,000 shares of Diamondback common stock for net proceeds of approximately $60.8 million . As of June 30, 2015 and December 31, 2014 , the Company did not own any shares of Diamondback common stock. The Company accounted for its interest in Diamondback as an equity method investment and had elected the fair value option of accounting for this investment. While the Company's ownership interest in Diamondback was below 20% prior to the Company's sale of its remaining Diamondback common stock in November 2014, the Company had appointed a member of Diamondback's Board. The individual appointed by the Company continues to serve on Diamondback's Board and the Company had influence through this board seat. The Company recognized an aggregate gain of approximately $72.9 million and $121.7 million on its investment in Diamondback for the three and six months ended June 30, 2014 , respectively, which is included in loss (income) from equity method investments in the consolidated statements of operations. Stingray Energy Services LLC During 2013, the Company invested in Stingray Energy Services LLC ("Stingray Energy"). Stingray Energy provides rental tools for land-based oil and natural gas drilling, completion and workover activities as well as the transfer of fresh water to wellsites. During the six months ended June 30, 2015 , the Company did not pay any cash calls to Stingray Energy. The (income) loss from equity method investments presented in the table above reflects any intercompany profit eliminations. Sturgeon Acquisitions LLC During 2014, the Company invested $20.7 million and received an ownership interest of 25% in Sturgeon Acquisitions LLC ("Sturgeon"). Sturgeon owns and operates sand mines that produce hydraulic fracturing grade sand. During the six months ended June 30, 2015 , Gulfport received $1.0 million in distributions from Sturgeon. Mammoth Energy Partners LP In the fourth quarter of 2014, the Company contributed its investments in Stingray Pressure, Stingray Logistics, Bison and Muskie to Mammoth for a 30.5% interest in this newly formed limited partnership. Mammoth has filed a registration statement on Form S-1 with the SEC in connection with its proposed initial public offering. Mammoth intends to pursue this offering in 2015 or 2016 subject to market conditions. The Company accounted for the contribution as a sale of financial assets under ASC 860. The Company estimated the fair market value of its investment in Mammoth as of the contribution date using an average of the market approach and the income approach, based on an independently prepared valuation of the contributed assets. The fair market value was reduced by a discount factor for lack of marketability due to the Company's minority interest, resulting in a fair value of $143.5 million for the Company's 30.5% interest. The fair value of the assets and liabilities acquired was estimated using assumptions that represent Level 3 inputs. See "Note 11 - Fair Value Measurements" for additional discussion of the measurement inputs.

Other Assets

Other Assets	6 Months Ended
	Jun. 30, 2015
Other Assets, Noncurrent Disclosure [Abstract]
Other Assets	OTHER ASSETS Prepaid expenses and other current assets consist of the following at June 30, 2015 : prepaid taxes of $12.1 million , prepaid insurance of $1.7 million and prepaid other expense of $1.4 million . Other assets consist of the following as of June 30, 2015 and December 31, 2014 : June 30, 2015 December 31, 2014 (In thousands) Plugging and abandonment escrow account on the WCBB properties (Note 9) $ 3,089 $ 3,097 Certificates of Deposit securing letter of credit 275 275 Prepaid drilling costs 269 483 Loan commitment fees 21,640 15,390 Deposits 34 34 Other 111 117 $ 25,418 $ 19,396

Long-Term Debt

Long-Term Debt	6 Months Ended
	Jun. 30, 2015
Long-term Debt, Unclassified [Abstract]
Long-Term Debt	LONG-TERM DEBT Long-term debt consisted of the following items as of June 30, 2015 and December 31, 2014 : June 30, 2015 December 31, 2014 (In thousands) Revolving credit agreement (1) $ — $ 100,000 Building loans (2) 1,738 1,826 7.75% senior unsecured notes due 2020 (3) 600,000 600,000 6.625% senior unsecured notes due 2023 (4) 350,000 — Unamortized original issue (discount) premium, net (5) 13,593 14,658 Construction loan (6) — — Less: current maturities of long term debt (1,738 ) (168 ) Debt reflected as long term $ 963,593 $ 716,316 The Company capitalized approximately $4.7 million and $8.4 million in interest expense to oil and natural gas properties during the three and six months ended June 30, 2015 , respectively. The Company capitalized approximately $3.9 million and $6.2 million in interest expense to oil and natural gas properties during the three and six months ended June 30, 2014 , respectively. (1) On December 27, 2013, the Company entered into an Amended and Restated Credit Agreement with The Bank of Nova Scotia, as administrative agent, sole lead arranger and sole bookrunner, Amegy Bank National Association, as syndication agent, KeyBank National Association, as documentation agent, and other lenders (The "Amended and Restated Credit Agreement") that provides for a maximum facility amount of $1.5 billion . The Amended and Restated Credit Agreement matures on June 6, 2018. The Company’s wholly-owned subsidiaries have guaranteed the obligations of the Company under the Amended and Restated Credit Agreement. On April 23, 2014, the Company entered into a first amendment to the Amended and Restated Credit Agreement. The first amendment increased the letter of credit sublimit from $20.0 million to $70.0 million and provided for an increase in the borrowing base availability from $150.0 million to $275.0 million . The first amendment also made certain changes to the lenders and their respective lending commitments thereunder. On November 26, 2014, the Company entered into a second amendment to the Amended and Restated Credit Agreement. The second amendment changed the definition of EBITDAX to exclude proceeds from the disposition of equity method investments and changed the ratio of funded debt to EBITDAX to be the ratio of net funded debt to EBITDAX. Net funded debt is funded debt less the amount of cash and short-term investments the Company has at the end of the relevant fiscal quarter. The second amendment increases the ratio from 2.00 to 1.00 to 3.50 to 1.00 for the period December 31, 2014 through June 30, 2015 and then decreases the ratio to 3.25 to 1.00 for the periods thereafter. Further, the second amendment increased the letter of credit sublimit from $70.0 million to $125.0 million and provided for an increase in the borrowing base availability from $275.0 million to $450.0 million . On April 10, 2015, the Company entered into a third amendment to the Amended and Restated Credit Agreement. The third amendment increased the borrowing base from $450.0 million to $575.0 million and increased the Company's basket for unsecured debt issuances to $1.2 billion . The third amendment also made certain changes to the lenders and their respective lending commitments thereunder. On May 29, 2015, the Company entered into a fourth amendment to the Amended and Restated Credit Agreement. The fourth amendment increased the letter of credit sublimit from $125.0 million to $150.0 million . Additionally, the Company received consent from its lenders to incur certain new secured indebtedness, limited to $30.0 million , to finance the construction of its new Oklahoma City headquarters. The lenders also agreed to waive certain provisions of the Amended and Restated Credit Agreement that may prohibit the construction loan. As of June 30, 2015 , the Company did not have any outstanding borrowings under the Amended and Restated Credit Agreement. At June 30, 2015 , the total availability for future borrowings under the Amended and Restated Credit Agreement, after giving effect to an aggregate of $92.7 million of letters of credit, was $482.3 million . Advances under the Amended and Restated Credit Agreement may be in the form of either base rate loans or eurodollar loans. The interest rate for base rate loans is equal to (1) the applicable rate, which ranges from 0.50% to 1.50% , plus (2) the highest of: (a) the federal funds rate plus 0.50% , (b) the rate of interest in effect for such day as publicly announced from time to time by agent as its “prime rate,” and (c) the eurodollar rate for an interest period of one month plus 1.00% . The interest rate for eurodollar loans is equal to (1) the applicable rate, which ranges from 1.50% to 2.50% , plus (2) the London interbank offered rate that appears on pages LIBOR01 or LIBOR02 of the Reuters screen that displays such rate for deposits in U.S. dollars, or, if such rate is not available, the rate as administered by ICE Benchmark Administration (or any other person that takes over administration of such rate) per annum equal to the offered rate on such other page or service that displays on average London interbank offered rate as determined by ICE Benchmark Administration (or any other person that takes over administration of such rate) for deposits in U.S. dollars, or, if such rate is not available, the average quotations for three major New York money center banks of whom the agent shall inquire as the “London Interbank Offered Rate” for deposits in U.S. dollars. The Amended and Restated Credit Agreement contains customary negative covenants including, but not limited to, restrictions on the Company’s and its subsidiaries’ ability to: • incur indebtedness; • grant liens; • pay dividends and make other restricted payments; • make investments; • make fundamental changes; • enter into swap contracts and forward sales contracts; • dispose of assets; • change the nature of their business; and • enter into transactions with affiliates. The negative covenants are subject to certain exceptions as specified in the Amended and Restated Credit Agreement. The Amended and Restated Credit Agreement also contains certain affirmative covenants, including, but not limited to the following financial covenants: (i) the ratio of net funded debt to EBITDAX (net income, excluding (i) any non-cash revenue or expense associated with swap contracts resulting from ASC 815 and (ii) any cash or noncash revenue or expense attributable to minority investments plus without duplication and, in the case of expenses, to the extent deducted from revenues in determining net income, the sum of (a) the aggregate amount of consolidated interest expense for such period, (b) the aggregate amount of income, franchise, capital or similar tax expense (other than ad valorem taxes) for such period, (c) all amounts attributable to depletion, depreciation, amortization and asset or goodwill impairment or writedown for such period, (d) all other non-cash charges, (e) exploration costs deducted in determining net income under successful efforts accounting, (f) actual cash distributions received from minority investments, (g) to the extent actually reimbursed by insurance, expenses with respect to liability on casualty events or business interruption, and (h) all reasonable transaction expenses related to dispositions and acquisitions of assets, investments and debt and equity offerings (provided that expenses related to any unsuccessful disposition will be limited to $3.0 million in the aggregate) for a twelve-month period may not be greater than 3.50 to 1.00 ; for the period December 31, 2014 through June 30, 2015 and 3.25 to 1.00 for the twelve-month period ending September 30, 2015 and periods thereafter; and (ii) the ratio of EBITDAX to interest expense for a twelve-month period may not be less than 3.00 to 1.00 . The Company was in compliance with all covenants at June 30, 2015 . (2) In March 2011, the Company entered into a new building loan agreement for the office building it occupies in Oklahoma City, Oklahoma. The new loan agreement refinanced the $2.4 million outstanding under the previous building loan agreement. The new agreement matures in February 2016 and bears interest at the rate of 5.82% per annum. The new building loan requires monthly interest and principal payments of approximately $22,000 and is collateralized by the Oklahoma City office building and associated land. (3) On October 17, 2012, the Company issued $250.0 million in aggregate principal amount of senior unsecured notes due 2020 (the "October Notes") to qualified institutional buyers pursuant to Rule 144A under the Securities Act and to certain non-U.S. persons in accordance with Regulation S under the Securities Act (the "October Notes Offering") under an indenture among the Company, its subsidiary guarantors and Wells Fargo Bank, National Association, as the trustee (the "senior note indenture"). On December 21, 2012, the Company issued an additional $50.0 million in aggregate principal amount of senior unsecured notes due 2020 (the "December Notes") to qualified institutional buyers pursuant to Rule 144A under the Securities Act and to certain non-U.S. persons in accordance with Regulation S under the Securities Act ("the December Notes Offering"). The December Notes were issued as additional securities under the senior note indenture. The Company used a portion of the net proceeds from the October Notes Offering to repay all amounts outstanding at such time under its revolving credit facility. The Company used the remaining net proceeds of the October Notes Offering and the net proceeds of the December Notes Offering for general corporate purposes, which included funding a portion of its 2013 capital development plan. The October Notes and the December Notes were exchanged for substantially identical notes in the same aggregate principal amount that were registered under the Securities Act in October 2013 (the "Exchange Notes"). On August 18, 2014, the Company issued an additional $300.0 million in aggregate principal amount of senior unsecured notes due 2020 (the "August Notes") to qualified institutional buyers pursuant to Rule 144A under the Securities Act and to certain non-U.S. persons in accordance with Regulation S under the Securities Act ("the August Notes Offering"). The August Notes were issued as additional securities under the senior note indenture. The Company used a portion of the net proceeds from the August Notes Offering to repay all amounts outstanding at such time under its revolving credit facility. The Company intends to use the remaining net proceeds of the August Notes Offering for general corporate purposes, including funding a portion of its 2014 and 2015 capital development plans. The October Notes Offering, December Notes Offering and the August Notes Offering are collectively referred to as the "Notes Offerings" and the Exchange Notes, and the August Notes are collectively referred to as the "Old Notes". In connection with the issuance of the August Notes, the Company and the subsidiary guarantors entered into a registration rights agreement with the initial purchasers on August 18, 2014, pursuant to which the Company and the subsidiary guarantors have agreed to file a registration statement with respect to an offer to exchange the August Notes for a new issue of substantially identical debt securities registered under the Securities Act. The registration statement relating to the exchange offer for the August Notes was filed on November 6, 2014, as amended on February 3, 2015, and declared effective by the SEC on February 4, 2015. The exchange offer for the August Notes was completed in March 2015. Under the senior note indenture relating to the Old Notes, interest on the Old Notes accrues at a rate of 7.75% per annum on the outstanding principal amount from October 17, 2012, payable semi-annually on May 1 and November 1 of each year, commencing on May 1, 2013. The Old Notes are the Company's senior unsecured obligations and rank equally in the right of payment with all of the Company's other senior indebtedness and senior in right of payment to any future subordinated indebtedness. All of the Company's existing and future restricted subsidiaries that guarantee the Company's secured revolving credit facility or certain other debt guarantee the Old Notes; provided, however, that the Old Notes are not guaranteed by Grizzly Holdings, Inc. and will not be guaranteed by any of the Company's future unrestricted subsidiaries. The Company may redeem some or all of the Old Notes at any time on or after November 1, 2016, at the redemption prices listed in the senior note indenture. Prior to November 1, 2016, the Company may redeem the Old Notes at a price equal to 100% of the principal amount plus a “make-whole” premium. In addition, prior to November 1, 2015, the Company may redeem up to 35% of the aggregate principal amount of the Old Notes with the net proceeds of certain equity offerings, provided that at least 65% of the aggregate principal amount of the Old Notes initially issued remains outstanding immediately after such redemption. (4) On April 21, 2015, the Company issued $350.0 million in aggregate principal amount of 6.625% Senior Notes due 2023 (the "April Notes" and, together with the "Old Notes," the "Notes") to qualified institutional buyers pursuant to Rule 144A under the Securities Act and to certain non-U.S. persons in accordance with Regulation S under the Securities Act (the "April Notes Offering"). The Company received net proceeds of approximately $343.6 million after initial purchaser discounts and commissions and estimated offering expenses. The April notes were issued under an indenture, dated as of April 21, 2015, among the Company, the subsidiary guarantors party thereto and Wells Fargo Bank, N.A., as trustee. Pursuant to the indenture relating to the April Notes, interest on the April Notes will accrue at a rate of 6.625% per annum on the outstanding principal amount thereof from April 21, 2015, payable semi-annually on May 1 and November 1 of each year, commencing on November 1, 2015. The April Notes are not guaranteed by Grizzly Holdings, Inc. and will not be guaranteed by any of the Company's future unrestricted subsidiaries. In connection with the April Notes Offering, the Company and its subsidiary guarantors entered into a registration rights agreement, dated as of April 21, 2015, pursuant to which the Company agreed to file a registration statement with respect to an offer to exchange the April Notes for a new issue of substantially identical debt securities registered under the Securities Act. The Company may be required to file a shelf registration statement to cover resales of the April Notes under certain circumstances. If the Company fails to satisfy certain obligations under the registration rights agreement, it agreed to pay additional interest to the holders of the April Notes as specified in the registration rights agreement. (5) The October Notes were issued at a price of 98.534% resulting in a gross discount of $3.7 million and an effective rate of 8.000% . The December Notes were issued at a price of 101.000% resulting in a gross premium of $0.5 million and an effective rate of 7.531% . The August Notes were issued at a price of 106.000% resulting in a gross premium of $18.0 million and an effective rate of 6.561% . The April Notes were issued at par. The premium and discount are being amortized using the effective interest method. (6) On June 4, 2015, the Company entered into a construction loan agreement (the "Construction Loan") with InterBank for the construction of a new corporate headquarters in Oklahoma City. The Construction Loan allows for a maximum principal amount of $24.5 million to be drawn. Interest accrues daily on the outstanding principal balance at a fixed rate of 4.50 % per annum and is payable on the last day of the month beginning June 30, 2015 through May 31, 2017. Monthly interest and principal payments are due beginning June 30, 2017, with the final payment due June 4, 2025. As of June 30, 2015 , the Company had not drawn on this loan.

Common Stock And Changes In Cap

Common Stock And Changes In Capitalization	6 Months Ended
	Jun. 30, 2015
Equity [Abstract]
Common Stock And Changes In Capitalization	COMMON STOCK AND CHANGES IN CAPITALIZATION Equity Offering On April 21, 2015, the Company issued 10,925,000 shares of its common stock in an underwritten public offering (which included 1,425,000 shares sold pursuant to an option to purchase additional shares of the Company's common stock granted by the Company to, and exercised in full by, the underwriters). The net proceeds from this equity offering (including the net proceeds from the sale of the shares of common stock to the underwriters pursuant to their option to purchase additional shares) were approximately $501.9 million after underwriting discounts and commissions and estimated offering expenses. The Company used a portion of these net proceeds, together with a portion of the net proceeds from its concurrent senior notes offering (see Note 5, " Long Term Debt "), to repay all amounts outstanding at that time under its revolving credit facility and intends to use the remaining net proceeds from these offerings to fund the pending acquisition of Paloma and for general corporate purposes, including the funding of a portion of its 2015 capital development plans. On June 12, 2015, the Company issued 11,500,000 shares of its common stock in an underwritten public offering (which included 1,500,000 shares sold pursuant to an option to purchase additional shares of the Company's common stock granted by the Company to, and exercised in full by, the underwriters). The net proceeds from this equity offering (including the net proceeds from the sale of the shares of common stock to the underwriters pursuant to their option to purchase additional shares) were approximately $479.8 million after underwriting discounts and commissions and estimated offering expenses. The Company used a portion of the net proceeds to fund the Monroe Acquisition (see Note 1) and intends to use the remaining funds for general corporate purposes, including the funding of a portion of its 2015 capital development plans.

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2015
Share-based Compensation [Abstract]
Stock-Based Compensation	STOCK-BASED COMPENSATION During the three and six months ended June 30, 2015 , the Company’s stock-based compensation cost was $ 3.2 million and $6.7 million , respectively, of which the Company capitalized $1.3 million and $2.7 million , respectively, relating to its exploration and development efforts. During the three and six months ended June 30, 2014 , the Company's stock-based compensation cost was $3.4 million and $7.7 million , respectively, of which the Company capitalized $1.3 million and $3.1 million , respectively, relating to its exploration and development efforts. The fair value of each option award is estimated on the date of grant using the Black-Scholes option valuation model. Expected volatilities are based on the historical volatility of the market price of Gulfport’s common stock over a period of time ending on the grant date. Based upon the historical experience of the Company, the expected term of options granted is equal to the vesting period plus one year. The risk-free rate for periods within the contractual life of the option is based on the U.S. Treasury yield curve in effect at the time of the grant. The 2013 Restated Stock Incentive Plan (which amended and restated the 2005 Plan) provides that all options must have an exercise price not less than the fair value of the Company’s common stock on the date of the grant. No stock options were issued during the six months ended June 30, 2015 and 2014 . The Company has not declared dividends and does not intend to do so in the foreseeable future, and thus did not use a dividend yield. In each case, the actual value that will be realized, if any, depends on the future performance of the common stock and overall stock market conditions. There is no assurance that the value an optionee actually realizes will be at or near the value estimated using the Black-Scholes model. A summary of the status of stock options and related activity for the six months ended June 30, 2015 is presented below: Shares Weighted Average Exercise Price per Share Weighted Average Remaining Contractual Term Aggregate Intrinsic Value (In thousands) Options outstanding at December 31, 2014 5,000 $ 9.07 0.69 $ 163 Granted — — Exercised — — — Forfeited/expired — — Options outstanding at June 30, 2015 5,000 $ 9.07 0.19 $ 156 Options exercisable at June 30, 2015 5,000 $ 9.07 0.19 $ 156 The following table summarizes information about the stock options outstanding at June 30, 2015 : Exercise Price Number Outstanding Weighted Average Remaining Life (in years) Number Exercisable $ 9.07 5,000 0.19 5,000 5,000 5,000 The following table summarizes restricted stock activity for the six months ended June 30, 2015 : Number of Unvested Restricted Shares Weighted Average Grant Date Fair Value Unvested shares as of December 31, 2014 387,245 $ 55.87 Granted 100,226 44.04 Vested (123,543 ) 51.02 Forfeited (4,000 ) 57.91 Unvested shares as of June 30, 2015 359,928 $ 54.22 Unrecognized compensation expense as of June 30, 2015 related to outstanding stock options and restricted shares was $ 15.4 million . The expense is expected to be recognized over a weighted average period of 1.52 years.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE Reconciliations of the components of basic and diluted net income per common share are presented in the tables below: Three months ended June 30, 2015 2014 Income Shares Per Share Income Shares Per Share (In thousands, except share data) Basic: Net (loss) income $ (31,325 ) 96,663,358 $ (0.32 ) $ 47,852 85,448,678 $ 0.56 Effect of dilutive securities: Stock options and awards — — — 357,218 Diluted: Net (loss) income $ (31,325 ) 96,663,358 $ (0.32 ) $ 47,852 85,805,896 $ 0.56 Six months ended June 30, 2015 2014 Income Shares Per Share Income Shares Per Share (In thousands, except share data) Basic: Net (loss) income $ (5,806 ) 91,201,824 $ (0.06 ) $ 130,410 85,354,566 $ 1.53 Effect of dilutive securities: Stock options and awards — — — 412,113 Diluted: Net (loss) income $ (5,806 ) 91,201,824 $ (0.06 ) $ 130,410 85,766,679 $ 1.52 There were 378,550 shares and 382,494 shares of common stock that were considered anti-dilutive for the three and six months ended June 30, 2015 , respectively. There were no potential shares of common stock that were considered anti-dilutive for the three and six months ended June 30, 2014 .

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Plugging and Abandonment Funds In connection with the Company's acquisition in 1997 of the remaining 50% interest in its WCBB properties, the Company assumed the seller’s (Chevron) obligation to contribute approximately $18,000 per month through March 2004 to a plugging and abandonment trust and the obligation to plug a minimum of 20 wells per year for 20 years commencing March 11, 1997. Chevron retained a security interest in production from these properties until the Company's abandonment obligations to Chevron have been fulfilled. Beginning in 2009, the Company could access the trust for use in plugging and abandonment charges associated with the property, although it has not yet done so. As of June 30, 2015 , the plugging and abandonment trust totaled approximately $3.1 million . At June 30, 2015 , the Company had plugged 463 wells at WCBB since it began its plugging program in 1997, which management believes fulfills its current minimum plugging obligation. Employment Agreements Effective November 1, 2012, the Company entered into an employment agreement with Messrs. James Palm, Mike Liddell and Michael G. Moore, each with an initial three -year term expiring on November 1, 2015 subject to automatic one -year extensions unless terminated by either party to the agreement at least 90 days prior to the end of the then current term. These agreements provided for minimum salary and bonus levels, subject to review and potential increase by the Compensation Committee and/or the Board of Directors, as well as participation in the Company's incentive plans and other employee benefits. Effective February 15, 2014, Gulfport's former Chief Executive Officer, James D. Palm, retired and his employment agreement with the company terminated. The Company entered into a separation agreement with Mr. Palm, under which agreement certain benefits are provided to, and obligations imposed on, Mr. Palm. As of June 30, 2015 , the minimum commitment under Mr. Palm's separation agreement was approximately $0.4 million . Mr. Liddell resigned as the Company's Chairman effective June 2013 at which date his employment agreement with Gulfport terminated. At that same time, the Company entered into a consulting agreement with Mr. Liddell. Mr. Liddell terminated his consulting agreement with the Company effective January 1, 2015. On April 22, 2014, the Board of Directors appointed Michael G. Moore as Chief Executive Officer of the Company. The Company and Mr. Moore entered into an amended and restated employment agreement. The agreement has a three-year term commencing effective April 22, 2014. This agreement provides, among other things, for a minimum salary level, subject to review and potential increase by the Compensation Committee and/or the Board of Directors, as well as participation in the Company's incentive plans and other employee benefits. On March 13, 2015, the Company entered into an employment agreement with Ross Kirtley, the Company's Chief Operating Officer. The agreement has a two -year term commencing effective April 22, 2014. This agreement provides, among other things, for a minimum salary level, subject to review and potential increase by the Compensation Committee and/or the Board of Directors, as well as participation in the Company's incentive plans and other employee benefits. On March 13, 2015, the Company entered into an employment agreement with Aaron Gaydosik, the Company's Chief Financial Officer. The agreement has a three -year term commencing effective August 11, 2014. This agreement provides, among other things, for a minimum salary level, subject to review and potential increase by the Compensation Committee and/or the Board of Directors, as well as participation in the Company's incentive plans and other employee benefits. Effective as of April 29, 2015, the Company amended and restated its existing employment agreement with Mr. Moore. The employment agreement, as amended and restated as of April 29, 2015, reflects the decision of the compensation committee of the Company’s board of directors to increase Mr. Moore’s annual base salary to $460,000 for 2015 and the determination by the compensation committee to continue to increase Mr. Moore’s annual base salary during 2016 and 2017 so as to achieve alignment between the 25th and 50th percentile of the Company’s peer group disclosed in the Company’s annual proxy statement. The amended and restated employment agreement also eliminated Mr. Moore’s right to receive a fixed annual grant of 40,000 shares of restricted stock. Instead, consistent with the recommendation of the Company’s compensation consultant and approved by the compensation committee, the amended and restated employment agreement provided that Mr. Moore is entitled to receive an award of restricted stock equal to 500% of his annual base salary on the same vesting schedule as previously provided in his employment agreement with respect to his equity awards. The aggregate minimum commitment for future salary at June 30, 2015 under the above listed employment agreements was approximately $1.8 million . Operating Leases The Company leases office facilities under non-cancellable operating leases exceeding one year. Future minimum lease commitments under these leases at June 30, 2015 were as follows: (In thousands) Remaining 2015 $ 332 2016 617 2017 513 2018 20 2019 — Total $ 1,482 Other Commitments Effective October 1, 2014, the Company entered into a Sand Supply Agreement with Muskie that expires on September 30, 2018. Pursuant to this agreement, the Company has agreed to purchase annual and monthly amounts of proppant sand subject to exceptions specified in the agreement at a fixed price per ton, subject to certain adjustments, plus agreed costs and expenses. Failure by either Muskie or the Company to deliver or accept the minimum monthly amount results in damages calculated per ton based on the difference between the monthly obligation amount and the amount actually delivered or accepted, as applicable. The Company did not incur any expenses related to non-utilization fees during the three and six months ended June 30, 2015 . Effective October 1, 2014, the Company entered into an Amended and Restated Master Services Agreement for pressure pumping services with Stingray Pressure that expires on September 30, 2018. Pursuant to this agreement, Stingray Pressure has agreed to provide hydraulic fracturing, stimulation and related completion and rework services to the Company and the Company has agreed to pay Stingray Pressure a monthly service fee plus the associated costs of the services provided. Future minimum commitments under these agreements at June 30, 2015 are as follows: (In thousands) Remaining 2015 $ 26,220 2016 52,440 2017 52,440 2018 39,330 Total $ 170,430 Litigation Due to the nature of the Company's business, it is, from time to time, involved in routine litigation or subject to disputes or claims related to its business activities, including workers' compensation claims and employment related disputes. In the opinion of the Company's management, none of the pending litigation, disputes or claims against the Company, if decided adversely, will have a material adverse effect on its financial condition, cash flows or results of operations.

Hedging Activities

Hedging Activities	6 Months Ended
	Jun. 30, 2015
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
Hedging Activities	HEDGING ACTIVITIES Oil Price Hedging Activities The Company seeks to reduce its exposure to unfavorable changes in oil and natural gas prices, which are subject to significant and often volatile fluctuation, by entering into fixed price swaps, swaptions and basis swaps. These contracts allow the Company to predict with greater certainty the effective oil and natural gas prices to be received for hedged production and benefit operating cash flows and earnings when market prices are less than the fixed prices provided in the contracts. However, the Company will not benefit from market prices that are higher than the fixed prices in the contracts for hedged production The Company records all derivative contracts at fair value. All derivative contracts are marked to market each quarter end and are included in the accompanying consolidated balance sheets as derivative assets and liabilities. During 2014 and 2015, the Company entered into fixed price swap contracts for 2014 through 2019 with five financial institutions. The Company’s fixed price swap and swaption contracts are tied to the commodity prices on Argus and NYMEX. The Company will receive the fixed price amount stated in the contract and pay to its counterparty the current market price as listed on Argus for Louisiana Light Sweet Crude for oil, the NYMEX West Texas Intermediate for oil and on the NYMEX Henry Hub for natural gas. At June 30, 2015 , the Company had the following fixed price swaps and swaptions in place: Daily Volume (Bbls/day) Weighted Average Price July 2015 - June 2016 2,500 $ 62.38 Daily Volume (MMBtu/day) Weighted Average Price July 2015 - August 2015 256,875 $ 3.87 September 2015 286,875 $ 3.82 October 2015 322,500 $ 3.79 November 2015 - December 2015 282,500 $ 3.91 January 2016 - March 2016 312,500 $ 3.73 April 2016 302,500 $ 3.72 May 2016 - December 2016 232,500 $ 3.63 January 2017 - June 2017 182,500 $ 3.59 July 2017 - December 2017 120,000 $ 3.40 January 2018 - December 2018 70,000 $ 3.35 January 2019 - March 2019 20,000 $ 3.37 In addition, the Company has entered into natural gas basis swap positions, which settle on the pricing index to basis differential of MichCon to the NYMEX Henry Hub natural gas price. As of June 30, 2015 , the Company's natural gas basis swap positions were as follows: Daily Volume (MMBtu/day) Hedged Differential July 2015 - December 2016 40,000 $ 0.02 At June 30, 2015 the fair value of derivative assets and liabilities related to the fixed price swaps, swaptions and basis swaps was as follows: (In thousands) Short-term derivative instruments - asset $ 77,350 Long-term derivative instruments - asset $ 25,871 Short-term derivative instruments - liability $ 937 Long-term derivative instruments - liability $ 2,753 All fixed price swaps, swaptions and basis swaps have been executed in connection with the Company's oil and natural gas price hedging program. For fixed price swaps, swaptions and basis swaps qualifying as cash flow hedges pursuant to FASB ASC 815, the realized contract price is included in oil and gas sales in the period for which the underlying production was hedged. For those contracts which are not designated as cash flow hedges changes in the fair value are classified as revenues on the Company's consolidated statements of operations. For derivatives designated as cash flow hedges and meeting the effectiveness guidelines of FASB ASC 815, changes in fair value are recognized in accumulated other comprehensive income (loss) until the hedged item is recognized in earnings. The Company had no cash flow hedges in place for the three and six months ended June 30, 2015 and 2014 , as all fixed price swaps, swaptions and basis swaps had either been deemed ineffective at their inception or had been accounted for using the mark-to-market accounting method. At June 30, 2015 , no amounts related to fixed price swaps, swaptions or basis swaps remain in accumulated other comprehensive income (loss). The Company recognized a loss of $34.6 million and $3.3 million due to the change in fair value of derivative instruments for the three and six months ended June 30, 2015 , respectively, which is included in oil and condensate and gas sales in the consolidated statements of operations. The Company recognized a gain of $2.2 million and a loss of $6.4 million due to the change in fair value of derivative instruments for the three and six months ended June 30, 2014 , respectively, which is included in oil and condensate and gas sales in the consolidated statements of operations.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS The Company records certain financial and non-financial assets and liabilities on the balance sheet at fair value in accordance with FASB ASC 820, "Fair Value Measurement and Disclosures" ("FASB ASC 820"). FASB ASC 820 defines fair value as the price that would be received to sell an asset or paid to transfer a liability (exit price) in an orderly transaction between market participants at the measurement date. The statement establishes market or observable inputs as the preferred sources of values, followed by assumptions based on hypothetical transactions in the absence of market inputs. The statement requires fair value measurements be classified and disclosed in one of the following categories: Level 1 – Quoted prices in active markets for identical assets and liabilities. Level 2 – Quoted prices in active markets for similar assets and liabilities, quoted prices for identical or similar instruments in markets that are not active and model-derived valuations whose inputs are observable or whose significant value drivers are observable. Level 3 – Significant inputs to the valuation model are unobservable. Financial assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurement. The following tables summarize the Company’s financial and non-financial liabilities by FASB ASC 820 valuation level as of June 30, 2015 : June 30, 2015 Level 1 Level 2 Level 3 (In thousands) Assets: Derivative Instruments $ 103,221 $ — $ — Liabilities: Derivative Instruments $ 3,690 $ — $ — The estimated fair value of the Company’s fixed price swap, swaption and basis swap contracts were based upon forward commodity prices based on quoted market prices, adjusted for differentials. See Note 10 for further discussion of the Company's hedging activities. The estimated fair values of proved oil and gas properties assumed in business combinations are based on a discounted cash flow model and market assumptions as to future commodity prices, projections of estimated quantities of oil and natural gas reserves, expectations for timing and amount of future development and operating costs, projections of future rates of production, expected recovery rates, and risk-adjusted discount rates. The estimated fair values of unevaluated oil and gas properties was based on geological studies, historical well performance, location and applicable mineral lease terms. Based on the unobservable nature of certain of the inputs the estimated fair value of the oil and gas properties assumed is deemed to use Level 3 inputs. See Note 1 for further discussion of the Company's acquisitions. The Company estimates asset retirement obligations pursuant to the provisions of FASB ASC Topic 410, “ Asset Retirement and Environmental Obligations ” (“FASB ASC 410”). The initial measurement of asset retirement obligations at fair value is calculated using discounted cash flow techniques and based on internal estimates of future retirement costs associated with oil and gas properties. Given the unobservable nature of the inputs, including plugging costs and reserve lives, the initial measurement of the asset retirement obligation liability is deemed to use Level 3 inputs. See Note 2 for further discussion of the Company’s asset retirement obligations. Asset retirement obligations incurred during the six months ended June 30, 2015 were approximately $ 4.1 million . Due to the unobservable nature of the inputs, the fair value of the Company's initial investment in Mammoth was estimated using assumptions that represent Level 3 inputs. The Company estimated the fair value of the investment as of the November 24, 2014 contribution date. See Note 3 for further discussion of the Company's contribution to Mammoth. The estimated fair value of the Company's investment in Mammoth was $143.5 million at December 31, 2014 .

Fair Value Of Financial Instrum

Fair Value Of Financial Instruments	6 Months Ended
	Jun. 30, 2015
Investments, All Other Investments [Abstract]
Fair Value Of Financial Instruments	FAIR VALUE OF FINANCIAL INSTRUMENTS The carrying amounts on the accompanying consolidated balance sheet for cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities, and current debt are carried at cost, which approximates market value due to their short-term nature. Long-term debt related to the building loan is carried at cost, which approximates market value based on the borrowing rates currently available to the Company with similar terms and maturities. At June 30, 2015 , the carrying value of the outstanding debt represented by the Notes was $963.6 million , including the remaining unamortized discount of approximately $2.7 million related to the October Notes and the remaining unamortized premium of approximately $ 0.4 million related to the December Notes and $15.9 million related to the August Notes. Based on the quoted market price, the fair value of the Notes was determined to be approximately $989.8 million at June 30, 2015 . The fair value of the derivative instruments is computed based on the difference between the prices provided by the fixed-price contracts and forward market prices as of the specified date, as adjusted for basis differentials, and for the Company's swaptions, market implied volatilities of the underlying commodity are also evaluated. Forward market prices for oil and natural gas are dependent upon supply and demand factors in such forward market and are subject to significant volatility.

Condensed Consolidating Financi

Condensed Consolidating Financial Information	6 Months Ended
	Jun. 30, 2015
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Consolidating Financial Information	CONDENSED CONSOLIDATING FINANCIAL INFORMATION On October 17, 2012, December 21, 2012, and August 18, 2014, the Company issued an aggregate of $600.0 million principal amount of its 7.75% Senior Notes. The October Notes and the December Notes were exchanged for substantially identical notes in the same aggregate principal amount that were registered under the Securities Act. The Exchange Notes and the August Notes are collectively referred to as the "Old Notes". The Old Notes are guaranteed on a senior unsecured basis by all existing consolidated subsidiaries that guarantee the Company's secured revolving credit facility or certain other debt (the "Guarantors"). The Old Notes are not guaranteed by Grizzly Holdings, Inc. (the "Non-Guarantor"). The Guarantors are 100% owned by Gulfport (the "Parent"), and the guarantees are full, unconditional, joint and several. There are no significant restrictions on the ability of the Parent or the Guarantors to obtain funds from each other in the form of a dividend or loan. In connection with the issuance of the August Notes, the Company and the subsidiary guarantors entered into a registration rights agreement with the initial purchasers on August 18, 2014, pursuant to which the Company and the subsidiary guarantors have agreed to file a registration statement with respect to an offer to exchange the August Notes for a new issue of substantially identical debt securities registered under the Securities Act. The registration statement relating to the exchange offer for the August Notes was filed on November 6, 2014, as amended on February 3, 2015, and declared effective by the SEC on February 4, 2015. The exchange offer for the August Notes was completed in March 2015. On April 21, 2015, the Company issued $350.0 million in aggregate principal amount of 6.625% Senior Notes due 2023 to qualified institutional buyers pursuant to Rule 144A under the Securities Act and to certain non-U.S. persons in accordance with Regulation S under the Securities Act. In connection with the April Notes Offering, the Company and its subsidiary guarantors entered into a registration rights agreement, dated as of April 21, 2015, pursuant to which the Company agreed to file a registration statement with respect to an offer to exchange the April Notes for a new issue of substantially identical debt securities registered under the Securities Act. The Company may be required to file a shelf registration statement to cover resales of the April Notes under certain circumstances. The following condensed consolidating balance sheets, statements of operations, statements of comprehensive income (loss) and statements of cash flows are provided for the Parent, the Guarantors and the Non-Guarantor and include the consolidating adjustments and eliminations necessary to arrive at the information for the Company on a condensed consolidated basis. The information has been presented using the equity method of accounting for the Parent's ownership of the Guarantors and the Non-Guarantor. CONDENSED CONSOLIDATING BALANCE SHEETS (Amounts in thousands) June 30, 2015 Parent Guarantors Non-Guarantor Eliminations Consolidated Assets Current assets: Cash and cash equivalents $ 524,240 $ 1,247 $ 1 $ — $ 525,488 Restricted cash 75,005 — — — 75,005 Accounts receivable - oil and gas 86,558 63 — — 86,621 Accounts receivable - related parties 90 — — — 90 Accounts receivable - intercompany 48,401 55 — (48,456 ) — Prepaid expenses and other current assets 15,168 — — — 15,168 Short-term derivative instruments 77,350 — — — 77,350 Total current assets 826,812 1,365 1 (48,456 ) 779,722 Property and equipment: Oil and natural gas properties, full-cost accounting 4,760,793 38,771 — (729 ) 4,798,835 Other property and equipment 22,887 43 — — 22,930 Accumulated depletion, depreciation, amortization and impairment (1,211,281 ) (27 ) — — (1,211,308 ) Property and equipment, net 3,572,399 38,787 — (729 ) 3,610,457 Other assets: Equity investments and investments in subsidiaries 353,243 — 164,112 (154,964 ) 362,391 Derivative instruments 25,871 — — — 25,871 Other assets 25,418 — — — 25,418 Total other assets 404,532 — 164,112 (154,964 ) 413,680 Total assets $ 4,803,743 $ 40,152 $ 164,113 $ (204,149 ) $ 4,803,859 Liabilities and Stockholders' Equity Current liabilities: Accounts payable and accrued liabilities $ 318,609 $ 116 $ — $ — $ 318,725 Accounts payable - intercompany — 48,326 130 (48,456 ) — Asset retirement obligation - current 75 — — — 75 Short-term derivative instruments 937 — — — 937 Deferred tax liability - current 26,508 — — — 26,508 Current maturities of long-term debt 1,738 — — — 1,738 Total current liabilities 347,867 48,442 130 (48,456 ) 347,983 Long-term derivative instrument 2,753 — — — 2,753 Asset retirement obligation - long-term 21,202 — — — 21,202 Deferred tax liability 201,022 — — — 201,022 Long-term debt, net of current maturities 963,593 — — — 963,593 Total liabilities 1,536,437 48,442 130 (48,456 ) 1,536,553 Stockholders' equity: Common stock 1,081 — — — 1,081 Paid-in capital 2,816,930 322 235,347 (235,669 ) 2,816,930 Accumulated other comprehensive income (loss) (38,412 ) — (38,412 ) 38,412 (38,412 ) Retained earnings (accumulated deficit) 487,707 (8,612 ) (32,952 ) 41,564 487,707 Total stockholders' equity 3,267,306 (8,290 ) 163,983 (155,693 ) 3,267,306 Total liabilities and stockholders' equity $ 4,803,743 $ 40,152 $ 164,113 $ (204,149 ) $ 4,803,859 CONDENSED CONSOLIDATING BALANCE SHEETS (Amounts in thousands) December 31, 2014 Parent Guarantors Non-Guarantor Eliminations Consolidated Assets Current assets: Cash and cash equivalents $ 141,535 $ 804 $ 1 $ — $ 142,340 Accounts receivable - oil and gas 103,762 96 — — 103,858 Accounts receivable - related parties 46 — — — 46 Accounts receivable - intercompany 45,222 27 — (45,249 ) — Prepaid expenses and other current assets 3,714 — — — 3,714 Short-term derivative instruments 78,391 — — — 78,391 Total current assets 372,670 927 1 (45,249 ) 328,349 Property and equipment: Oil and natural gas properties, full-cost accounting, 3,887,874 35,990 — (710 ) 3,923,154 Other property and equipment 18,301 43 — — 18,344 Accumulated depletion, depreciation, amortization and impairment (1,050,855 ) (24 ) — — (1,050,879 ) Property and equipment, net 2,855,320 36,009 — (710 ) 2,890,619 Other assets: Equity investments and investments in subsidiaries 360,238 — 180,217 (170,874 ) 369,581 Derivative instruments 24,448 — — — 24,448 Other assets 19,396 — — — 19,396 Total other assets 404,082 — 180,217 (170,874 ) 413,425 Total assets $ 3,632,072 $ 36,936 $ 180,218 $ (216,833 ) $ 3,632,393 Liabilities and Stockholders' Equity Current liabilities: Accounts payable and accrued liabilities $ 371,089 $ 321 $ — $ — $ 371,410 Accounts payable - intercompany — 45,143 106 (45,249 ) — Asset retirement obligation - current 75 — — — 75 Deferred tax liability 27,070 — — — 27,070 Current maturities of long-term debt 168 — — — 168 Total current liabilities 398,402 45,464 106 (45,249 ) 398,723 Asset retirement obligation - long-term 17,863 — — — 17,863 Deferred tax liability 203,195 — — — 203,195 Long-term debt, net of current maturities 716,316 — — — 716,316 Total liabilities 1,335,776 45,464 106 (45,249 ) 1,336,097 Stockholders' equity: Common stock 856 — — — 856 Paid-in capital 1,828,602 322 227,079 (227,401 ) 1,828,602 Accumulated other comprehensive income (loss) (26,675 ) — (26,675 ) 26,675 (26,675 ) Retained earnings (accumulated deficit) 493,513 (8,850 ) (20,292 ) 29,142 493,513 Total stockholders' equity 2,296,296 (8,528 ) 180,112 (171,584 ) 2,296,296 Total liabilities and stockholders' equity $ 3,632,072 $ 36,936 $ 180,218 $ (216,833 ) $ 3,632,393 CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Amounts in thousands) Three months ended June 30, 2015 Parent Guarantors Non-Guarantor Eliminations Consolidated Total revenues $ 112,027 $ 243 $ — $ — $ 112,270 Costs and expenses: Lease operating expenses 16,685 178 — — 16,863 Production taxes 3,260 25 — — 3,285 Midstream gathering and processing 32,892 12 — — 32,904 Depreciation, depletion, and amortization 71,154 1 — — 71,155 General and administrative 9,488 5 22 — 9,515 Accretion expense 192 — — — 192 133,671 221 22 — 133,914 (LOSS) INCOME FROM OPERATIONS (21,644 ) 22 (22 ) — (21,644 ) OTHER (INCOME) EXPENSE: Interest expense 12,023 — — — 12,023 Interest income (248 ) — — — (248 ) Loss (income) from equity method investments and investments in subsidiaries 15,120 — 8,494 (8,494 ) 15,120 26,895 — 8,494 (8,494 ) 26,895 (LOSS) INCOME BEFORE INCOME TAXES (48,539 ) 22 (8,516 ) 8,494 (48,539 ) INCOME TAX BENEFIT (17,214 ) — — — (17,214 ) NET (LOSS) INCOME $ (31,325 ) $ 22 $ (8,516 ) $ 8,494 $ (31,325 ) CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Amounts in thousands) Three months ended June 30, 2014 Parent Guarantors Non-Guarantor Eliminations Consolidated Total revenues $ 114,014 $ 722 $ — $ — $ 114,736 Costs and expenses: Lease operating expenses 12,457 223 — — 12,680 Production taxes 6,529 72 — — 6,601 Midstream gathering and processing 10,758 22 — — 10,780 Depreciation, depletion, and amortization 55,993 1 — — 55,994 General and administrative 10,346 35 1 — 10,382 Accretion expense 189 — — — 189 96,272 353 1 — 96,626 INCOME (LOSS) FROM OPERATIONS 17,742 369 (1 ) — 18,110 OTHER (INCOME) EXPENSE: Interest expense 2,402 — — — 2,402 Interest income (36 ) — — — (36 ) Litigation settlement 6,000 — — — 6,000 (Income) loss from equity method investments and investments in subsidiaries (69,937 ) — 2,228 (1,860 ) (69,569 ) (61,571 ) — 2,228 (1,860 ) (61,203 ) INCOME (LOSS) BEFORE INCOME TAXES 79,313 369 (2,229 ) 1,860 79,313 INCOME TAX EXPENSE 31,461 — — — 31,461 NET INCOME (LOSS) $ 47,852 $ 369 $ (2,229 ) $ 1,860 $ 47,852 CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Amounts in thousands) Six months ended June 30, 2015 Parent Guarantors Non-Guarantor Eliminations Consolidated Total revenues $ 287,859 $ 728 $ — $ — $ 288,587 Costs and expenses: Lease operating expenses 33,472 371 — — 33,843 Production taxes 7,513 57 — — 7,570 Midstream gathering and processing 58,266 19 — — 58,285 Depreciation, depletion, and amortization 161,062 2 — — 161,064 General and administrative 20,249 41 24 — 20,314 Accretion expense 382 — — — 382 280,944 490 24 — 281,458 INCOME (LOSS) FROM OPERATIONS 6,915 238 (24 ) — 7,129 OTHER (INCOME) EXPENSE: Interest expense 20,782 — — — 20,782 Interest income (257 ) — — — (257 ) (Income) loss from equity method investments and investments in subsidiaries (5,069 ) — 12,636 (12,422 ) (4,855 ) 15,456 — 12,636 (12,422 ) 15,670 (LOSS) INCOME BEFORE INCOME TAXES (8,541 ) 238 (12,660 ) 12,422 (8,541 ) INCOME TAX BENEFIT (2,735 ) — — — (2,735 ) NET (LOSS) INCOME $ (5,806 ) $ 238 $ (12,660 ) $ 12,422 $ (5,806 ) CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Amounts in thousands) Six months ended June 30, 2014 Parent Guarantors Non-Guarantor Eliminations Consolidated Total revenues $ 231,864 $ 901 $ — $ — $ 232,765 Costs and expenses: Lease operating expenses 23,838 471 — — 24,309 Production taxes 13,466 92 — — 13,558 Midstream gathering and processing 18,515 34 — — 18,549 Depreciation, depletion, and amortization 112,870 1 — — 112,871 General and administrative 19,834 62 (3 ) — 19,893 Accretion expense 377 — — — 377 Gain on sale of assets (11 ) — — — (11 ) 188,889 660 (3 ) — 189,546 INCOME FROM OPERATIONS 42,975 241 3 — 43,219 OTHER (INCOME) EXPENSE: Interest expense 6,287 — — — 6,287 Interest income (142 ) — — — (142 ) Litigation settlement 24,000 — — — 24,000 (Income) loss from equity method investments and investments in subsidiaries (198,288 ) — 4,229 (3,985 ) (198,044 ) (168,143 ) — 4,229 (3,985 ) (167,899 ) INCOME (LOSS) BEFORE INCOME TAXES 211,118 241 (4,226 ) 3,985 211,118 INCOME TAX EXPENSE 80,708 — — — 80,708 NET INCOME (LOSS) $ 130,410 $ 241 $ (4,226 ) $ 3,985 $ 130,410 CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Amounts in thousands) Three months ended June 30, 2015 Parent Guarantors Non-Guarantor Eliminations Consolidated Net (loss) income $ (31,325 ) $ 22 $ (8,516 ) $ 8,494 $ (31,325 ) Foreign currency translation adjustment 3,247 — 3,247 (3,247 ) 3,247 Other comprehensive income (loss) 3,247 — 3,247 (3,247 ) 3,247 Comprehensive (loss) income $ (28,078 ) $ 22 $ (5,269 ) $ 5,247 $ (28,078 ) Three months ended June 30, 2014 Parent Guarantors Non-Guarantor Eliminations Consolidated Net income (loss) $ 47,852 $ 369 $ (2,229 ) $ 1,860 $ 47,852 Foreign currency translation adjustment 6,816 — 6,816 (6,816 ) 6,816 Other comprehensive income (loss) 6,816 — 6,816 (6,816 ) 6,816 Comprehensive income (loss) $ 54,668 $ 369 $ 4,587 $ (4,956 ) $ 54,668 Six months ended June 30, 2015 Parent Guarantors Non-Guarantor Eliminations Consolidated Net (loss) income $ (5,806 ) $ 238 $ (12,660 ) $ 12,422 $ (5,806 ) Foreign currency translation adjustment (11,737 ) — (11,737 ) 11,737 (11,737 ) Other comprehensive (loss) income (11,737 ) — (11,737 ) 11,737 (11,737 ) Comprehensive (loss) income $ (17,543 ) $ 238 $ (24,397 ) $ 24,159 $ (17,543 ) Six months ended June 30, 2014 Parent Guarantors Non-Guarantor Eliminations Consolidated Net income (loss) $ 130,410 $ 241 $ (4,226 ) $ 3,985 $ 130,410 Foreign currency translation adjustment (462 ) — (462 ) 462 (462 ) Other comprehensive (loss) income (462 ) — (462 ) 462 (462 ) Comprehensive income (loss) $ 129,948 $ 241 $ (4,688 ) $ 4,447 $ 129,948 CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS (Amounts in thousands) Six months ended June 30, 2015 Parent Guarantors Non-Guarantor Eliminations Consolidated Net cash provided by (used in) operating activities $ 135,485 $ 3,389 $ (1 ) $ 1 $ 138,874 Net cash (used in) provided by investing activities (976,820 ) (2,946 ) (8,267 ) 8,267 (979,766 ) Net cash provided by (used in) financing activities 1,224,040 — 8,268 (8,268 ) 1,224,040 Net increase in cash and cash equivalents 382,705 443 — — 383,148 Cash and cash equivalents at beginning of period 141,535 804 1 — 142,340 Cash and cash equivalents at end of period $ 524,240 $ 1,247 $ 1 $ — $ 525,488 Six months ended June 30, 2014 Parent Guarantors Non-Guarantor Eliminations Consolidated Net cash provided by (used in) operating activities $ 203,057 $ (1,546 ) $ (2 ) $ — $ 201,509 Net cash provided by (used in) investing activities (621,155 ) (3,608 ) (16,569 ) 16,572 (624,760 ) Net cash provided by (used in) financing activities 39,588 — 16,572 (16,572 ) 39,588 Net increase (decrease) in cash and cash equivalents (378,510 ) (5,154 ) 1 — (383,663 ) Cash and cash equivalents at beginning of period 451,431 7,525 — — 458,956 Cash and cash equivalents at end of period $ 72,921 $ 2,371 $ 1 $ — $ 75,293

Recent Accounting Pronouncement

Recent Accounting Pronouncements	6 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
Recent Accounting Pronouncements	RECENT ACCOUNTING PRONOUNCEMENTS In April 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-08: Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360) - Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. ASU 2014-08 changes the threshold for a disposal to qualify as a discontinued operation and requires new disclosures of both discontinued operations and certain other material disposal transactions that do not meet the revised definition of a discontinued operation. Under the updated standard, a disposal of a component or group of components of an entity is required to be reported as discontinued operations if the disposal represents a strategic shift that has (or will have) a major effect on an entity’s operations and financial results when the component or group of components of the entity (1) has been disposed of by a sale, (2) has been disposed of other than by sale or (3) is classified as held for sale. The ASU is effective for annual and interim periods beginning after December 15, 2014, however, early adoption is permitted. The Company early adopted this ASU on a prospective basis beginning with the second quarter of 2014. The adoption did not have a material impact on the Company’s consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers , which supersedes the revenue recognition requirements in Topic 605, Revenue Recognition , and most industry-specific guidance. The core principle of the new standard is for the recognition of revenue to depict the transfer of goods or services to customers in amounts that reflect the payment to which the company expects to be entitled in exchange for those goods or services. The new standard will also result in enhanced revenue disclosures, provide guidance for transactions that were not previously addressed comprehensively and improve guidance for multiple-element arrangements. The ASU is effective for annual periods beginning after December 15, 2016, and interim periods within those years, using either a full or a modified retrospective application approach. In July 2015, the FASB decided to defer the effective date by one year (until 2018). The Company is in the process of evaluating the impact on its consolidated financial statements. In August 2014, the FASB issued ASU No. 2014-15, " Presentation of Financial Statements - Going Concern (Subtopic 205-40). " The new guidance addresses management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern and in certain circumstances to provide related footnote disclosures. The standard is effective for the annual period ending after December 15, 2016 and for annual and interim periods thereafter. Early adoption is permitted. The Company does not believe that the adoption of this guidance will have a material impact on its consolidated financial statements. In April 2015, the FASB issued ASU No. 2015-03, " Simplifying the Presentation of Debt Issuance Costs (ASU 2015-03) ." To simplify presentation of debt issuance costs, ASU 2015-03 requires that debt issuance costs be presented in the balance sheet as a direct deduction from the carrying amount of the debt liability, consistent with debt discounts. ASU 2015-03 is effective for public entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted. The Company is in the process of assessing the effects of adoption of this new guidance.

Recent Accounting Pronounceme22

Recent Accounting Pronouncements (Policies)	6 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
Recent Accounting Pronouncements	In April 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-08: Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360) - Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. ASU 2014-08 changes the threshold for a disposal to qualify as a discontinued operation and requires new disclosures of both discontinued operations and certain other material disposal transactions that do not meet the revised definition of a discontinued operation. Under the updated standard, a disposal of a component or group of components of an entity is required to be reported as discontinued operations if the disposal represents a strategic shift that has (or will have) a major effect on an entity’s operations and financial results when the component or group of components of the entity (1) has been disposed of by a sale, (2) has been disposed of other than by sale or (3) is classified as held for sale. The ASU is effective for annual and interim periods beginning after December 15, 2014, however, early adoption is permitted. The Company early adopted this ASU on a prospective basis beginning with the second quarter of 2014. The adoption did not have a material impact on the Company’s consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers , which supersedes the revenue recognition requirements in Topic 605, Revenue Recognition , and most industry-specific guidance. The core principle of the new standard is for the recognition of revenue to depict the transfer of goods or services to customers in amounts that reflect the payment to which the company expects to be entitled in exchange for those goods or services. The new standard will also result in enhanced revenue disclosures, provide guidance for transactions that were not previously addressed comprehensively and improve guidance for multiple-element arrangements. The ASU is effective for annual periods beginning after December 15, 2016, and interim periods within those years, using either a full or a modified retrospective application approach. In July 2015, the FASB decided to defer the effective date by one year (until 2018). The Company is in the process of evaluating the impact on its consolidated financial statements. In August 2014, the FASB issued ASU No. 2014-15, " Presentation of Financial Statements - Going Concern (Subtopic 205-40). " The new guidance addresses management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern and in certain circumstances to provide related footnote disclosures. The standard is effective for the annual period ending after December 15, 2016 and for annual and interim periods thereafter. Early adoption is permitted. The Company does not believe that the adoption of this guidance will have a material impact on its consolidated financial statements. In April 2015, the FASB issued ASU No. 2015-03, " Simplifying the Presentation of Debt Issuance Costs (ASU 2015-03) ." To simplify presentation of debt issuance costs, ASU 2015-03 requires that debt issuance costs be presented in the balance sheet as a direct deduction from the carrying amount of the debt liability, consistent with debt discounts. ASU 2015-03 is effective for public entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted. The Company is in the process of assessing the effects of adoption of this new guidance.

Acquisitions (Tables)

Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2015
Rhino Exploration, LLC, Utica Shale Properties [Member]
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the consideration paid in the Rhino Acquisition to acquire the properties and the fair value amount of the assets acquired as of March 20, 2014. (In thousands) Consideration paid Cash, net of purchase price adjustments $ 179,527 Fair value of identifiable assets acquired Oil and natural gas properties Proved $ 31,961 Unproved 6,263 Unevaluated 141,303 Fair value of net identifiable assets acquired $ 179,527
American Energy - Utica, LLC [Member]
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the consideration paid in the AEU Acquisition to acquire the properties and the fair value amount of the assets acquired as of June 12, 2015. Both the consideration paid and the fair value assigned to the assets is preliminary and subject to adjustment upon final closing. (In thousands) Consideration paid Cash, net of purchase price adjustments $ 405,029 Fair value of identifiable assets acquired Oil and natural gas properties Proved $ 70,804 Unevaluated 334,225 Fair value of net identifiable assets acquired $ 405,029

Property And Equipment (Tables)

Property And Equipment (Tables)	6 Months Ended
	Jun. 30, 2015
Property, Plant and Equipment [Abstract]
Schedule Of Property And Equipment	The major categories of property and equipment and related accumulated depletion, depreciation, amortization and impairment as of June 30, 2015 and December 31, 2014 are as follows: June 30, 2015 December 31, 2014 (In thousands) Oil and natural gas properties $ 4,798,835 $ 3,923,154 Office furniture and fixtures 11,430 10,752 Building 7,833 5,398 Land 3,667 2,194 Total property and equipment 4,821,765 3,941,498 Accumulated depletion, depreciation, amortization and impairment (1,211,308 ) (1,050,879 ) Property and equipment, net $ 3,610,457 $ 2,890,619
Summary Of Oil And Gas Properties Not Subject To Amortization	The following table summarizes the Company’s non-producing properties excluded from amortization by area at June 30, 2015 : June 30, 2015 (In thousands) Colorado $ 5,083 Bakken 96 Southern Louisiana 263 Ohio 1,791,538 Other 45 $ 1,797,025
Schedule Of Asset Retirement Obligation	A reconciliation of the Company's asset retirement obligation for the six months ended June 30, 2015 and 2014 is as follows: June 30, 2015 June 30, 2014 (In thousands) Asset retirement obligation, beginning of period $ 17,938 $ 15,083 Liabilities incurred 4,077 3,613 Liabilities settled (1,120 ) (3,097 ) Accretion expense 382 377 Asset retirement obligation as of end of period 21,277 15,976 Less current portion 75 795 Asset retirement obligation, long-term $ 21,202 $ 15,181

Equity Investments (Tables)

Equity Investments (Tables)	6 Months Ended
	Jun. 30, 2015
Equity Method Investments and Joint Ventures [Abstract]
Investments Accounted For By The Equity Method	Investments accounted for by the equity method consist of the following as of June 30, 2015 and December 31, 2014 : Carrying Value (Income) loss from equity method investments Approximate Ownership % June 30, 2015 December 31, 2014 Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 (In thousands) Investment in Tatex Thailand II, LLC 23.5 % $ — $ — $ — $ — $ — $ — Investment in Tatex Thailand III, LLC 17.9 % — — 189 121 189 170 Investment in Grizzly Oil Sands ULC 24.9999 % 164,113 180,218 8,494 2,228 12,636 4,229 Investment in Bison Drilling and Field Services LLC — % — — — (329 ) — 1,604 Investment in Muskie Proppant LLC — % — — — (101 ) — 433 Investment in Timber Wolf Terminals LLC 50.0 % 1,000 1,013 7 — 13 — Investment in Windsor Midstream LLC 22.5 % 27,766 13,505 881 (35 ) (17,906 ) (203 ) Investment in Stingray Pressure Pumping LLC — % — — — 1,630 — 2,143 Investment in Stingray Cementing LLC 50.0 % 2,002 2,647 105 106 172 201 Investment in Blackhawk Midstream LLC 48.5 % — — — — (7,217 ) (84,787 ) Investment in Stingray Logistics LLC — % — — — (238 ) — (157 ) Investment in Diamondback Energy, Inc. — % — — — (72,945 ) — (121,712 ) Investment in Stingray Energy Services LLC 50.0 % 5,905 5,718 311 (6 ) 321 35 Investment in Sturgeon Acquisitions LLC 25.0 % 22,599 22,507 (491 ) — (1,059 ) — Investment in Mammoth Energy Partners LP 30.5 % 139,006 143,973 5,624 — 7,996 — $ 362,391 $ 369,581 $ 15,120 $ (69,569 ) $ (4,855 ) $ (198,044 )
Equity Method Investment Balance Sheet Summary	Summarized balance sheet information: June 30, 2015 December 31, 2014 (In thousands) Current assets $ 170,637 $ 181,060 Noncurrent assets $ 1,414,991 $ 1,306,891 Current liabilities $ 96,004 $ 114,506 Noncurrent liabilities $ 208,319 $ 230,062
Equity Method Investment Income Statement Summary	Summarized results of operations: Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 (In thousands) Gross revenue $ 130,134 $ 220,013 $ 263,690 $ 378,294 Net (loss) income $ (45,246 ) $ 26,099 $ 45,422 $ 207,604

Other Assets (Tables)

Other Assets (Tables)	6 Months Ended
	Jun. 30, 2015
Other Assets, Noncurrent Disclosure [Abstract]
Schedule Of Other Assets	Other assets consist of the following as of June 30, 2015 and December 31, 2014 : June 30, 2015 December 31, 2014 (In thousands) Plugging and abandonment escrow account on the WCBB properties (Note 9) $ 3,089 $ 3,097 Certificates of Deposit securing letter of credit 275 275 Prepaid drilling costs 269 483 Loan commitment fees 21,640 15,390 Deposits 34 34 Other 111 117 $ 25,418 $ 19,396

Long-Term Debt (Tables)

Long-Term Debt (Tables)	6 Months Ended
	Jun. 30, 2015
Long-term Debt, Unclassified [Abstract]
Break-Down of Long-Term Debt	Long-term debt consisted of the following items as of June 30, 2015 and December 31, 2014 : June 30, 2015 December 31, 2014 (In thousands) Revolving credit agreement (1) $ — $ 100,000 Building loans (2) 1,738 1,826 7.75% senior unsecured notes due 2020 (3) 600,000 600,000 6.625% senior unsecured notes due 2023 (4) 350,000 — Unamortized original issue (discount) premium, net (5) 13,593 14,658 Construction loan (6) — — Less: current maturities of long term debt (1,738 ) (168 ) Debt reflected as long term $ 963,593 $ 716,316 The Company capitalized approximately $4.7 million and $8.4 million in interest expense to oil and natural gas properties during the three and six months ended June 30, 2015 , respectively. The Company capitalized approximately $3.9 million and $6.2 million in interest expense to oil and natural gas properties during the three and six months ended June 30, 2014 , respectively. (1) On December 27, 2013, the Company entered into an Amended and Restated Credit Agreement with The Bank of Nova Scotia, as administrative agent, sole lead arranger and sole bookrunner, Amegy Bank National Association, as syndication agent, KeyBank National Association, as documentation agent, and other lenders (The "Amended and Restated Credit Agreement") that provides for a maximum facility amount of $1.5 billion . The Amended and Restated Credit Agreement matures on June 6, 2018. The Company’s wholly-owned subsidiaries have guaranteed the obligations of the Company under the Amended and Restated Credit Agreement. On April 23, 2014, the Company entered into a first amendment to the Amended and Restated Credit Agreement. The first amendment increased the letter of credit sublimit from $20.0 million to $70.0 million and provided for an increase in the borrowing base availability from $150.0 million to $275.0 million . The first amendment also made certain changes to the lenders and their respective lending commitments thereunder. On November 26, 2014, the Company entered into a second amendment to the Amended and Restated Credit Agreement. The second amendment changed the definition of EBITDAX to exclude proceeds from the disposition of equity method investments and changed the ratio of funded debt to EBITDAX to be the ratio of net funded debt to EBITDAX. Net funded debt is funded debt less the amount of cash and short-term investments the Company has at the end of the relevant fiscal quarter. The second amendment increases the ratio from 2.00 to 1.00 to 3.50 to 1.00 for the period December 31, 2014 through June 30, 2015 and then decreases the ratio to 3.25 to 1.00 for the periods thereafter. Further, the second amendment increased the letter of credit sublimit from $70.0 million to $125.0 million and provided for an increase in the borrowing base availability from $275.0 million to $450.0 million . On April 10, 2015, the Company entered into a third amendment to the Amended and Restated Credit Agreement. The third amendment increased the borrowing base from $450.0 million to $575.0 million and increased the Company's basket for unsecured debt issuances to $1.2 billion . The third amendment also made certain changes to the lenders and their respective lending commitments thereunder. On May 29, 2015, the Company entered into a fourth amendment to the Amended and Restated Credit Agreement. The fourth amendment increased the letter of credit sublimit from $125.0 million to $150.0 million . Additionally, the Company received consent from its lenders to incur certain new secured indebtedness, limited to $30.0 million , to finance the construction of its new Oklahoma City headquarters. The lenders also agreed to waive certain provisions of the Amended and Restated Credit Agreement that may prohibit the construction loan. As of June 30, 2015 , the Company did not have any outstanding borrowings under the Amended and Restated Credit Agreement. At June 30, 2015 , the total availability for future borrowings under the Amended and Restated Credit Agreement, after giving effect to an aggregate of $92.7 million of letters of credit, was $482.3 million . Advances under the Amended and Restated Credit Agreement may be in the form of either base rate loans or eurodollar loans. The interest rate for base rate loans is equal to (1) the applicable rate, which ranges from 0.50% to 1.50% , plus (2) the highest of: (a) the federal funds rate plus 0.50% , (b) the rate of interest in effect for such day as publicly announced from time to time by agent as its “prime rate,” and (c) the eurodollar rate for an interest period of one month plus 1.00% . The interest rate for eurodollar loans is equal to (1) the applicable rate, which ranges from 1.50% to 2.50% , plus (2) the London interbank offered rate that appears on pages LIBOR01 or LIBOR02 of the Reuters screen that displays such rate for deposits in U.S. dollars, or, if such rate is not available, the rate as administered by ICE Benchmark Administration (or any other person that takes over administration of such rate) per annum equal to the offered rate on such other page or service that displays on average London interbank offered rate as determined by ICE Benchmark Administration (or any other person that takes over administration of such rate) for deposits in U.S. dollars, or, if such rate is not available, the average quotations for three major New York money center banks of whom the agent shall inquire as the “London Interbank Offered Rate” for deposits in U.S. dollars. The Amended and Restated Credit Agreement contains customary negative covenants including, but not limited to, restrictions on the Company’s and its subsidiaries’ ability to: • incur indebtedness; • grant liens; • pay dividends and make other restricted payments; • make investments; • make fundamental changes; • enter into swap contracts and forward sales contracts; • dispose of assets; • change the nature of their business; and • enter into transactions with affiliates. The negative covenants are subject to certain exceptions as specified in the Amended and Restated Credit Agreement. The Amended and Restated Credit Agreement also contains certain affirmative covenants, including, but not limited to the following financial covenants: (i) the ratio of net funded debt to EBITDAX (net income, excluding (i) any non-cash revenue or expense associated with swap contracts resulting from ASC 815 and (ii) any cash or noncash revenue or expense attributable to minority investments plus without duplication and, in the case of expenses, to the extent deducted from revenues in determining net income, the sum of (a) the aggregate amount of consolidated interest expense for such period, (b) the aggregate amount of income, franchise, capital or similar tax expense (other than ad valorem taxes) for such period, (c) all amounts attributable to depletion, depreciation, amortization and asset or goodwill impairment or writedown for such period, (d) all other non-cash charges, (e) exploration costs deducted in determining net income under successful efforts accounting, (f) actual cash distributions received from minority investments, (g) to the extent actually reimbursed by insurance, expenses with respect to liability on casualty events or business interruption, and (h) all reasonable transaction expenses related to dispositions and acquisitions of assets, investments and debt and equity offerings (provided that expenses related to any unsuccessful disposition will be limited to $3.0 million in the aggregate) for a twelve-month period may not be greater than 3.50 to 1.00 ; for the period December 31, 2014 through June 30, 2015 and 3.25 to 1.00 for the twelve-month period ending September 30, 2015 and periods thereafter; and (ii) the ratio of EBITDAX to interest expense for a twelve-month period may not be less than 3.00 to 1.00 . The Company was in compliance with all covenants at June 30, 2015 . (2) In March 2011, the Company entered into a new building loan agreement for the office building it occupies in Oklahoma City, Oklahoma. The new loan agreement refinanced the $2.4 million outstanding under the previous building loan agreement. The new agreement matures in February 2016 and bears interest at the rate of 5.82% per annum. The new building loan requires monthly interest and principal payments of approximately $22,000 and is collateralized by the Oklahoma City office building and associated land. (3) On October 17, 2012, the Company issued $250.0 million in aggregate principal amount of senior unsecured notes due 2020 (the "October Notes") to qualified institutional buyers pursuant to Rule 144A under the Securities Act and to certain non-U.S. persons in accordance with Regulation S under the Securities Act (the "October Notes Offering") under an indenture among the Company, its subsidiary guarantors and Wells Fargo Bank, National Association, as the trustee (the "senior note indenture"). On December 21, 2012, the Company issued an additional $50.0 million in aggregate principal amount of senior unsecured notes due 2020 (the "December Notes") to qualified institutional buyers pursuant to Rule 144A under the Securities Act and to certain non-U.S. persons in accordance with Regulation S under the Securities Act ("the December Notes Offering"). The December Notes were issued as additional securities under the senior note indenture. The Company used a portion of the net proceeds from the October Notes Offering to repay all amounts outstanding at such time under its revolving credit facility. The Company used the remaining net proceeds of the October Notes Offering and the net proceeds of the December Notes Offering for general corporate purposes, which included funding a portion of its 2013 capital development plan. The October Notes and the December Notes were exchanged for substantially identical notes in the same aggregate principal amount that were registered under the Securities Act in October 2013 (the "Exchange Notes"). On August 18, 2014, the Company issued an additional $300.0 million in aggregate principal amount of senior unsecured notes due 2020 (the "August Notes") to qualified institutional buyers pursuant to Rule 144A under the Securities Act and to certain non-U.S. persons in accordance with Regulation S under the Securities Act ("the August Notes Offering"). The August Notes were issued as additional securities under the senior note indenture. The Company used a portion of the net proceeds from the August Notes Offering to repay all amounts outstanding at such time under its revolving credit facility. The Company intends to use the remaining net proceeds of the August Notes Offering for general corporate purposes, including funding a portion of its 2014 and 2015 capital development plans. The October Notes Offering, December Notes Offering and the August Notes Offering are collectively referred to as the "Notes Offerings" and the Exchange Notes, and the August Notes are collectively referred to as the "Old Notes". In connection with the issuance of the August Notes, the Company and the subsidiary guarantors entered into a registration rights agreement with the initial purchasers on August 18, 2014, pursuant to which the Company and the subsidiary guarantors have agreed to file a registration statement with respect to an offer to exchange the August Notes for a new issue of substantially identical debt securities registered under the Securities Act. The registration statement relating to the exchange offer for the August Notes was filed on November 6, 2014, as amended on February 3, 2015, and declared effective by the SEC on February 4, 2015. The exchange offer for the August Notes was completed in March 2015. Under the senior note indenture relating to the Old Notes, interest on the Old Notes accrues at a rate of 7.75% per annum on the outstanding principal amount from October 17, 2012, payable semi-annually on May 1 and November 1 of each year, commencing on May 1, 2013. The Old Notes are the Company's senior unsecured obligations and rank equally in the right of payment with all of the Company's other senior indebtedness and senior in right of payment to any future subordinated indebtedness. All of the Company's existing and future restricted subsidiaries that guarantee the Company's secured revolving credit facility or certain other debt guarantee the Old Notes; provided, however, that the Old Notes are not guaranteed by Grizzly Holdings, Inc. and will not be guaranteed by any of the Company's future unrestricted subsidiaries. The Company may redeem some or all of the Old Notes at any time on or after November 1, 2016, at the redemption prices listed in the senior note indenture. Prior to November 1, 2016, the Company may redeem the Old Notes at a price equal to 100% of the principal amount plus a “make-whole” premium. In addition, prior to November 1, 2015, the Company may redeem up to 35% of the aggregate principal amount of the Old Notes with the net proceeds of certain equity offerings, provided that at least 65% of the aggregate principal amount of the Old Notes initially issued remains outstanding immediately after such redemption. (4) On April 21, 2015, the Company issued $350.0 million in aggregate principal amount of 6.625% Senior Notes due 2023 (the "April Notes" and, together with the "Old Notes," the "Notes") to qualified institutional buyers pursuant to Rule 144A under the Securities Act and to certain non-U.S. persons in accordance with Regulation S under the Securities Act (the "April Notes Offering"). The Company received net proceeds of approximately $343.6 million after initial purchaser discounts and commissions and estimated offering expenses. The April notes were issued under an indenture, dated as of April 21, 2015, among the Company, the subsidiary guarantors party thereto and Wells Fargo Bank, N.A., as trustee. Pursuant to the indenture relating to the April Notes, interest on the April Notes will accrue at a rate of 6.625% per annum on the outstanding principal amount thereof from April 21, 2015, payable semi-annually on May 1 and November 1 of each year, commencing on November 1, 2015. The April Notes are not guaranteed by Grizzly Holdings, Inc. and will not be guaranteed by any of the Company's future unrestricted subsidiaries. In connection with the April Notes Offering, the Company and its subsidiary guarantors entered into a registration rights agreement, dated as of April 21, 2015, pursuant to which the Company agreed to file a registration statement with respect to an offer to exchange the April Notes for a new issue of substantially identical debt securities registered under the Securities Act. The Company may be required to file a shelf registration statement to cover resales of the April Notes under certain circumstances. If the Company fails to satisfy certain obligations under the registration rights agreement, it agreed to pay additional interest to the holders of the April Notes as specified in the registration rights agreement. (5) The October Notes were issued at a price of 98.534% resulting in a gross discount of $3.7 million and an effective rate of 8.000% . The December Notes were issued at a price of 101.000% resulting in a gross premium of $0.5 million and an effective rate of 7.531% . The August Notes were issued at a price of 106.000% resulting in a gross premium of $18.0 million and an effective rate of 6.561% . The April Notes were issued at par. The premium and discount are being amortized using the effective interest method. (6) On June 4, 2015, the Company entered into a construction loan agreement (the "Construction Loan") with InterBank for the construction of a new corporate headquarters in Oklahoma City. The Construction Loan allows for a maximum principal amount of $24.5 million to be drawn. Interest accrues daily on the outstanding principal balance at a fixed rate of 4.50 % per annum and is payable on the last day of the month beginning June 30, 2015 through May 31, 2017. Monthly interest and principal payments are due beginning June 30, 2017, with the final payment due June 4, 2025. As of June 30, 2015 , the Company had not drawn on this loan.

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2015
Share-based Compensation [Abstract]
Summary Of Stock Option Activity	A summary of the status of stock options and related activity for the six months ended June 30, 2015 is presented below: Shares Weighted Average Exercise Price per Share Weighted Average Remaining Contractual Term Aggregate Intrinsic Value (In thousands) Options outstanding at December 31, 2014 5,000 $ 9.07 0.69 $ 163 Granted — — Exercised — — — Forfeited/expired — — Options outstanding at June 30, 2015 5,000 $ 9.07 0.19 $ 156 Options exercisable at June 30, 2015 5,000 $ 9.07 0.19 $ 156
Summary Of Stock Option Plans By Exercise Price	The following table summarizes information about the stock options outstanding at June 30, 2015 : Exercise Price Number Outstanding Weighted Average Remaining Life (in years) Number Exercisable $ 9.07 5,000 0.19 5,000 5,000 5,000
Summary Of Restricted Stock Award And Unit Activity	The following table summarizes restricted stock activity for the six months ended June 30, 2015 : Number of Unvested Restricted Shares Weighted Average Grant Date Fair Value Unvested shares as of December 31, 2014 387,245 $ 55.87 Granted 100,226 44.04 Vested (123,543 ) 51.02 Forfeited (4,000 ) 57.91 Unvested shares as of June 30, 2015 359,928 $ 54.22

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Schedule of Earnings Per Share Reconciliation	Reconciliations of the components of basic and diluted net income per common share are presented in the tables below: Three months ended June 30, 2015 2014 Income Shares Per Share Income Shares Per Share (In thousands, except share data) Basic: Net (loss) income $ (31,325 ) 96,663,358 $ (0.32 ) $ 47,852 85,448,678 $ 0.56 Effect of dilutive securities: Stock options and awards — — — 357,218 Diluted: Net (loss) income $ (31,325 ) 96,663,358 $ (0.32 ) $ 47,852 85,805,896 $ 0.56 Six months ended June 30, 2015 2014 Income Shares Per Share Income Shares Per Share (In thousands, except share data) Basic: Net (loss) income $ (5,806 ) 91,201,824 $ (0.06 ) $ 130,410 85,354,566 $ 1.53 Effect of dilutive securities: Stock options and awards — — — 412,113 Diluted: Net (loss) income $ (5,806 ) 91,201,824 $ (0.06 ) $ 130,410 85,766,679 $ 1.52

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Lease Commitments	Future minimum lease commitments under these leases at June 30, 2015 were as follows: (In thousands) Remaining 2015 $ 332 2016 617 2017 513 2018 20 2019 — Total $ 1,482
Schedule of Future Commitment Payments	Future minimum commitments under these agreements at June 30, 2015 are as follows: (In thousands) Remaining 2015 $ 26,220 2016 52,440 2017 52,440 2018 39,330 Total $ 170,430

Hedging Activities (Tables)

Hedging Activities (Tables)	6 Months Ended
	Jun. 30, 2015
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
Schedule Of Derivative Instruments	At June 30, 2015 , the Company had the following fixed price swaps and swaptions in place: Daily Volume (Bbls/day) Weighted Average Price July 2015 - June 2016 2,500 $ 62.38 Daily Volume (MMBtu/day) Weighted Average Price July 2015 - August 2015 256,875 $ 3.87 September 2015 286,875 $ 3.82 October 2015 322,500 $ 3.79 November 2015 - December 2015 282,500 $ 3.91 January 2016 - March 2016 312,500 $ 3.73 April 2016 302,500 $ 3.72 May 2016 - December 2016 232,500 $ 3.63 January 2017 - June 2017 182,500 $ 3.59 July 2017 - December 2017 120,000 $ 3.40 January 2018 - December 2018 70,000 $ 3.35 January 2019 - March 2019 20,000 $ 3.37 In addition, the Company has entered into natural gas basis swap positions, which settle on the pricing index to basis differential of MichCon to the NYMEX Henry Hub natural gas price. As of June 30, 2015 , the Company's natural gas basis swap positions were as follows: Daily Volume (MMBtu/day) Hedged Differential July 2015 - December 2016 40,000 $ 0.02
Schedule Of Derivative Instruments In Statement Of Financial Position	At June 30, 2015 the fair value of derivative assets and liabilities related to the fixed price swaps, swaptions and basis swaps was as follows: (In thousands) Short-term derivative instruments - asset $ 77,350 Long-term derivative instruments - asset $ 25,871 Short-term derivative instruments - liability $ 937 Long-term derivative instruments - liability $ 2,753

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	The following tables summarize the Company’s financial and non-financial liabilities by FASB ASC 820 valuation level as of June 30, 2015 : June 30, 2015 Level 1 Level 2 Level 3 (In thousands) Assets: Derivative Instruments $ 103,221 $ — $ — Liabilities: Derivative Instruments $ 3,690 $ — $ —

Condensed Consolidating Finan33

Condensed Consolidating Financial Information (Tables)	6 Months Ended
	Jun. 30, 2015
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Consolidating Balance Sheets	CONDENSED CONSOLIDATING BALANCE SHEETS (Amounts in thousands) June 30, 2015 Parent Guarantors Non-Guarantor Eliminations Consolidated Assets Current assets: Cash and cash equivalents $ 524,240 $ 1,247 $ 1 $ — $ 525,488 Restricted cash 75,005 — — — 75,005 Accounts receivable - oil and gas 86,558 63 — — 86,621 Accounts receivable - related parties 90 — — — 90 Accounts receivable - intercompany 48,401 55 — (48,456 ) — Prepaid expenses and other current assets 15,168 — — — 15,168 Short-term derivative instruments 77,350 — — — 77,350 Total current assets 826,812 1,365 1 (48,456 ) 779,722 Property and equipment: Oil and natural gas properties, full-cost accounting 4,760,793 38,771 — (729 ) 4,798,835 Other property and equipment 22,887 43 — — 22,930 Accumulated depletion, depreciation, amortization and impairment (1,211,281 ) (27 ) — — (1,211,308 ) Property and equipment, net 3,572,399 38,787 — (729 ) 3,610,457 Other assets: Equity investments and investments in subsidiaries 353,243 — 164,112 (154,964 ) 362,391 Derivative instruments 25,871 — — — 25,871 Other assets 25,418 — — — 25,418 Total other assets 404,532 — 164,112 (154,964 ) 413,680 Total assets $ 4,803,743 $ 40,152 $ 164,113 $ (204,149 ) $ 4,803,859 Liabilities and Stockholders' Equity Current liabilities: Accounts payable and accrued liabilities $ 318,609 $ 116 $ — $ — $ 318,725 Accounts payable - intercompany — 48,326 130 (48,456 ) — Asset retirement obligation - current 75 — — — 75 Short-term derivative instruments 937 — — — 937 Deferred tax liability - current 26,508 — — — 26,508 Current maturities of long-term debt 1,738 — — — 1,738 Total current liabilities 347,867 48,442 130 (48,456 ) 347,983 Long-term derivative instrument 2,753 — — — 2,753 Asset retirement obligation - long-term 21,202 — — — 21,202 Deferred tax liability 201,022 — — — 201,022 Long-term debt, net of current maturities 963,593 — — — 963,593 Total liabilities 1,536,437 48,442 130 (48,456 ) 1,536,553 Stockholders' equity: Common stock 1,081 — — — 1,081 Paid-in capital 2,816,930 322 235,347 (235,669 ) 2,816,930 Accumulated other comprehensive income (loss) (38,412 ) — (38,412 ) 38,412 (38,412 ) Retained earnings (accumulated deficit) 487,707 (8,612 ) (32,952 ) 41,564 487,707 Total stockholders' equity 3,267,306 (8,290 ) 163,983 (155,693 ) 3,267,306 Total liabilities and stockholders' equity $ 4,803,743 $ 40,152 $ 164,113 $ (204,149 ) $ 4,803,859 CONDENSED CONSOLIDATING BALANCE SHEETS (Amounts in thousands) December 31, 2014 Parent Guarantors Non-Guarantor Eliminations Consolidated Assets Current assets: Cash and cash equivalents $ 141,535 $ 804 $ 1 $ — $ 142,340 Accounts receivable - oil and gas 103,762 96 — — 103,858 Accounts receivable - related parties 46 — — — 46 Accounts receivable - intercompany 45,222 27 — (45,249 ) — Prepaid expenses and other current assets 3,714 — — — 3,714 Short-term derivative instruments 78,391 — — — 78,391 Total current assets 372,670 927 1 (45,249 ) 328,349 Property and equipment: Oil and natural gas properties, full-cost accounting, 3,887,874 35,990 — (710 ) 3,923,154 Other property and equipment 18,301 43 — — 18,344 Accumulated depletion, depreciation, amortization and impairment (1,050,855 ) (24 ) — — (1,050,879 ) Property and equipment, net 2,855,320 36,009 — (710 ) 2,890,619 Other assets: Equity investments and investments in subsidiaries 360,238 — 180,217 (170,874 ) 369,581 Derivative instruments 24,448 — — — 24,448 Other assets 19,396 — — — 19,396 Total other assets 404,082 — 180,217 (170,874 ) 413,425 Total assets $ 3,632,072 $ 36,936 $ 180,218 $ (216,833 ) $ 3,632,393 Liabilities and Stockholders' Equity Current liabilities: Accounts payable and accrued liabilities $ 371,089 $ 321 $ — $ — $ 371,410 Accounts payable - intercompany — 45,143 106 (45,249 ) — Asset retirement obligation - current 75 — — — 75 Deferred tax liability 27,070 — — — 27,070 Current maturities of long-term debt 168 — — — 168 Total current liabilities 398,402 45,464 106 (45,249 ) 398,723 Asset retirement obligation - long-term 17,863 — — — 17,863 Deferred tax liability 203,195 — — — 203,195 Long-term debt, net of current maturities 716,316 — — — 716,316 Total liabilities 1,335,776 45,464 106 (45,249 ) 1,336,097 Stockholders' equity: Common stock 856 — — — 856 Paid-in capital 1,828,602 322 227,079 (227,401 ) 1,828,602 Accumulated other comprehensive income (loss) (26,675 ) — (26,675 ) 26,675 (26,675 ) Retained earnings (accumulated deficit) 493,513 (8,850 ) (20,292 ) 29,142 493,513 Total stockholders' equity 2,296,296 (8,528 ) 180,112 (171,584 ) 2,296,296 Total liabilities and stockholders' equity $ 3,632,072 $ 36,936 $ 180,218 $ (216,833 ) $ 3,632,393
Condensed Consolidating Statements of Operations	CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Amounts in thousands) Three months ended June 30, 2015 Parent Guarantors Non-Guarantor Eliminations Consolidated Total revenues $ 112,027 $ 243 $ — $ — $ 112,270 Costs and expenses: Lease operating expenses 16,685 178 — — 16,863 Production taxes 3,260 25 — — 3,285 Midstream gathering and processing 32,892 12 — — 32,904 Depreciation, depletion, and amortization 71,154 1 — — 71,155 General and administrative 9,488 5 22 — 9,515 Accretion expense 192 — — — 192 133,671 221 22 — 133,914 (LOSS) INCOME FROM OPERATIONS (21,644 ) 22 (22 ) — (21,644 ) OTHER (INCOME) EXPENSE: Interest expense 12,023 — — — 12,023 Interest income (248 ) — — — (248 ) Loss (income) from equity method investments and investments in subsidiaries 15,120 — 8,494 (8,494 ) 15,120 26,895 — 8,494 (8,494 ) 26,895 (LOSS) INCOME BEFORE INCOME TAXES (48,539 ) 22 (8,516 ) 8,494 (48,539 ) INCOME TAX BENEFIT (17,214 ) — — — (17,214 ) NET (LOSS) INCOME $ (31,325 ) $ 22 $ (8,516 ) $ 8,494 $ (31,325 ) CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Amounts in thousands) Three months ended June 30, 2014 Parent Guarantors Non-Guarantor Eliminations Consolidated Total revenues $ 114,014 $ 722 $ — $ — $ 114,736 Costs and expenses: Lease operating expenses 12,457 223 — — 12,680 Production taxes 6,529 72 — — 6,601 Midstream gathering and processing 10,758 22 — — 10,780 Depreciation, depletion, and amortization 55,993 1 — — 55,994 General and administrative 10,346 35 1 — 10,382 Accretion expense 189 — — — 189 96,272 353 1 — 96,626 INCOME (LOSS) FROM OPERATIONS 17,742 369 (1 ) — 18,110 OTHER (INCOME) EXPENSE: Interest expense 2,402 — — — 2,402 Interest income (36 ) — — — (36 ) Litigation settlement 6,000 — — — 6,000 (Income) loss from equity method investments and investments in subsidiaries (69,937 ) — 2,228 (1,860 ) (69,569 ) (61,571 ) — 2,228 (1,860 ) (61,203 ) INCOME (LOSS) BEFORE INCOME TAXES 79,313 369 (2,229 ) 1,860 79,313 INCOME TAX EXPENSE 31,461 — — — 31,461 NET INCOME (LOSS) $ 47,852 $ 369 $ (2,229 ) $ 1,860 $ 47,852 CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Amounts in thousands) Six months ended June 30, 2015 Parent Guarantors Non-Guarantor Eliminations Consolidated Total revenues $ 287,859 $ 728 $ — $ — $ 288,587 Costs and expenses: Lease operating expenses 33,472 371 — — 33,843 Production taxes 7,513 57 — — 7,570 Midstream gathering and processing 58,266 19 — — 58,285 Depreciation, depletion, and amortization 161,062 2 — — 161,064 General and administrative 20,249 41 24 — 20,314 Accretion expense 382 — — — 382 280,944 490 24 — 281,458 INCOME (LOSS) FROM OPERATIONS 6,915 238 (24 ) — 7,129 OTHER (INCOME) EXPENSE: Interest expense 20,782 — — — 20,782 Interest income (257 ) — — — (257 ) (Income) loss from equity method investments and investments in subsidiaries (5,069 ) — 12,636 (12,422 ) (4,855 ) 15,456 — 12,636 (12,422 ) 15,670 (LOSS) INCOME BEFORE INCOME TAXES (8,541 ) 238 (12,660 ) 12,422 (8,541 ) INCOME TAX BENEFIT (2,735 ) — — — (2,735 ) NET (LOSS) INCOME $ (5,806 ) $ 238 $ (12,660 ) $ 12,422 $ (5,806 ) CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Amounts in thousands) Six months ended June 30, 2014 Parent Guarantors Non-Guarantor Eliminations Consolidated Total revenues $ 231,864 $ 901 $ — $ — $ 232,765 Costs and expenses: Lease operating expenses 23,838 471 — — 24,309 Production taxes 13,466 92 — — 13,558 Midstream gathering and processing 18,515 34 — — 18,549 Depreciation, depletion, and amortization 112,870 1 — — 112,871 General and administrative 19,834 62 (3 ) — 19,893 Accretion expense 377 — — — 377 Gain on sale of assets (11 ) — — — (11 ) 188,889 660 (3 ) — 189,546 INCOME FROM OPERATIONS 42,975 241 3 — 43,219 OTHER (INCOME) EXPENSE: Interest expense 6,287 — — — 6,287 Interest income (142 ) — — — (142 ) Litigation settlement 24,000 — — — 24,000 (Income) loss from equity method investments and investments in subsidiaries (198,288 ) — 4,229 (3,985 ) (198,044 ) (168,143 ) — 4,229 (3,985 ) (167,899 ) INCOME (LOSS) BEFORE INCOME TAXES 211,118 241 (4,226 ) 3,985 211,118 INCOME TAX EXPENSE 80,708 — — — 80,708 NET INCOME (LOSS) $ 130,410 $ 241 $ (4,226 ) $ 3,985 $ 130,410
Condensed Consolidating Statements of Comprehensive Income (Loss)	CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Amounts in thousands) Three months ended June 30, 2015 Parent Guarantors Non-Guarantor Eliminations Consolidated Net (loss) income $ (31,325 ) $ 22 $ (8,516 ) $ 8,494 $ (31,325 ) Foreign currency translation adjustment 3,247 — 3,247 (3,247 ) 3,247 Other comprehensive income (loss) 3,247 — 3,247 (3,247 ) 3,247 Comprehensive (loss) income $ (28,078 ) $ 22 $ (5,269 ) $ 5,247 $ (28,078 ) Three months ended June 30, 2014 Parent Guarantors Non-Guarantor Eliminations Consolidated Net income (loss) $ 47,852 $ 369 $ (2,229 ) $ 1,860 $ 47,852 Foreign currency translation adjustment 6,816 — 6,816 (6,816 ) 6,816 Other comprehensive income (loss) 6,816 — 6,816 (6,816 ) 6,816 Comprehensive income (loss) $ 54,668 $ 369 $ 4,587 $ (4,956 ) $ 54,668 Six months ended June 30, 2015 Parent Guarantors Non-Guarantor Eliminations Consolidated Net (loss) income $ (5,806 ) $ 238 $ (12,660 ) $ 12,422 $ (5,806 ) Foreign currency translation adjustment (11,737 ) — (11,737 ) 11,737 (11,737 ) Other comprehensive (loss) income (11,737 ) — (11,737 ) 11,737 (11,737 ) Comprehensive (loss) income $ (17,543 ) $ 238 $ (24,397 ) $ 24,159 $ (17,543 ) Six months ended June 30, 2014 Parent Guarantors Non-Guarantor Eliminations Consolidated Net income (loss) $ 130,410 $ 241 $ (4,226 ) $ 3,985 $ 130,410 Foreign currency translation adjustment (462 ) — (462 ) 462 (462 ) Other comprehensive (loss) income (462 ) — (462 ) 462 (462 ) Comprehensive income (loss) $ 129,948 $ 241 $ (4,688 ) $ 4,447 $ 129,948
Condensed Consolidating Statements of Cash Flows	Six months ended June 30, 2015 Parent Guarantors Non-Guarantor Eliminations Consolidated Net cash provided by (used in) operating activities $ 135,485 $ 3,389 $ (1 ) $ 1 $ 138,874 Net cash (used in) provided by investing activities (976,820 ) (2,946 ) (8,267 ) 8,267 (979,766 ) Net cash provided by (used in) financing activities 1,224,040 — 8,268 (8,268 ) 1,224,040 Net increase in cash and cash equivalents 382,705 443 — — 383,148 Cash and cash equivalents at beginning of period 141,535 804 1 — 142,340 Cash and cash equivalents at end of period $ 524,240 $ 1,247 $ 1 $ — $ 525,488 Six months ended June 30, 2014 Parent Guarantors Non-Guarantor Eliminations Consolidated Net cash provided by (used in) operating activities $ 203,057 $ (1,546 ) $ (2 ) $ — $ 201,509 Net cash provided by (used in) investing activities (621,155 ) (3,608 ) (16,569 ) 16,572 (624,760 ) Net cash provided by (used in) financing activities 39,588 — 16,572 (16,572 ) 39,588 Net increase (decrease) in cash and cash equivalents (378,510 ) (5,154 ) 1 — (383,663 ) Cash and cash equivalents at beginning of period 451,431 7,525 — — 458,956 Cash and cash equivalents at end of period $ 72,921 $ 2,371 $ 1 $ — $ 75,293

Acquisitions (Details)

Acquisitions (Details) $ in Thousands	Jun. 29, 2015USD ($)a	Jun. 12, 2015USD ($)awellmiMMcf	Jun. 09, 2015USD ($)a	Mar. 20, 2014USD ($)	Jun. 29, 2015USD ($)a	Apr. 30, 2015USD ($)a	Dec. 31, 2014USD ($)	Jun. 30, 2015USD ($)	Feb. 28, 2014a
Rhino Exploration, LLC, Utica Shale Properties [Member]
Business Acquisition [Line Items]
Purchase price							$ 182,000
Gas and oil acreage, net | a									8,000
Cash, net of purchase price adjustments				$ 179,527			$ 179,500
Fair value of net identifiable assets acquired				179,527
Rhino Exploration, LLC, Utica Shale Properties [Member] | Proved Properties [Member]
Business Acquisition [Line Items]
Fair value of net identifiable assets acquired				31,961
Rhino Exploration, LLC, Utica Shale Properties [Member] | Unproved Properties [Member]
Business Acquisition [Line Items]
Fair value of net identifiable assets acquired				6,263
Rhino Exploration, LLC, Utica Shale Properties [Member] | Unevaluated Properties [Member]
Business Acquisition [Line Items]
Fair value of net identifiable assets acquired				$ 141,303
Paloma Partners III, LLC [Member]
Business Acquisition [Line Items]
Purchase price						$ 301,300
Gas and oil acreage, net | a						24,000
Amount put in escrow								$ 75,000
American Energy - Utica, LLC [Member]
Business Acquisition [Line Items]
Purchase price					$ 405,400
Cash, net of purchase price adjustments		$ 405,029			$ 405,000
Fair value of net identifiable assets acquired		405,029
American Energy - Utica, LLC [Member] | Proved Properties [Member]
Business Acquisition [Line Items]
Fair value of net identifiable assets acquired		70,804
American Energy - Utica, LLC [Member] | Unevaluated Properties [Member]
Business Acquisition [Line Items]
Fair value of net identifiable assets acquired		334,225
Belmont And Jefferson Counties, Ohio [Member] | American Energy - Utica, LLC [Member]
Business Acquisition [Line Items]
Purchase price			$ 68,200
Gross and net acres acquired | a			6,198
Monroe County, Ohio [Member] | American Energy - Utica, LLC [Member]
Business Acquisition [Line Items]
Purchase price	$ 18,200	$ 319,000
Gas and oil acreage, gross | a	4,950	38,965			4,950
Gas and oil acreage, net | a	1,900	27,228			1,900
Daily production of well acquired | MMcf		14.6
Gross wells acquired | well		18
Net wells acquired | well		11.3
Gas gathering system (in miles) | mi		11
Number of well pad locations acquired | well		4

Property And Equipment (Schedul

Property And Equipment (Schedule Of Property And Equipment) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Oil and natural gas properties	$ 4,798,835	$ 3,923,154
Office furniture and fixtures	11,430	10,752
Building	7,833	5,398
Land	3,667	2,194
Total property and equipment	4,821,765	3,941,498
Accumulated depletion, depreciation, amortization and impairment	(1,211,308)	(1,050,879)
Property and equipment, net	$ 3,610,457	$ 2,890,619

Property And Equipment (Narrati

Property And Equipment (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jan. 31, 2013	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Oct. 31, 2012	Oct. 11, 2012	May. 07, 2012
Property, Plant and Equipment [Line Items]
Cumulative capitalization of general and administrative costs incurred and capitalized to the full cost pool		$ 86,200		$ 86,200
Capitalized general and administrative costs		6,300	$ 6,900	13,500	$ 13,200
Capitalized costs of oil and natural gas properties excluded from amortization		$ 1,797,025		1,797,025		$ 1,465,538
Payment received from Diamondback				$ (17,237)	$ 48,631
Diamondback [Member]
Property, Plant and Equipment [Line Items]
Investment (shares)								7,914,036
Promissory note receivable								$ 63,600
Ownership interest							21.40%		35.00%
Diamondback [Member] | Accounts Receivable - Related Party [Member]
Property, Plant and Equipment [Line Items]
Payment received from Diamondback	$ 18,600
Minimum [Member]
Property, Plant and Equipment [Line Items]
Expected number of years amortization will commence				3 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Expected number of years amortization will commence				5 years

Property And Equipment (Summary

Property And Equipment (Summary Of Oil And Gas Properties Not Subject To Amortization) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items]
Total oil and gas properties not subject to amortization, total	$ 1,797,025	$ 1,465,538
Colorado [Member]
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items]
Total oil and gas properties not subject to amortization, total	5,083
Bakken [Member]
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items]
Total oil and gas properties not subject to amortization, total	96
Southern Louisiana [Member]
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items]
Total oil and gas properties not subject to amortization, total	263
Ohio [Member]
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items]
Total oil and gas properties not subject to amortization, total	1,791,538
Other [Member]
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items]
Total oil and gas properties not subject to amortization, total	$ 45

Property And Equipment (Sched38

Property And Equipment (Schedule Of Asset Retirement Obligation) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Asset retirement obligation, beginning of period			$ 17,938	$ 15,083
Liabilities incurred			4,077	3,613
Liabilities settled			(1,120)	(3,097)
Accretion expense	$ 192	$ 189	382	377
Asset retirement obligation as of end of period	21,277	15,976	21,277	15,976
Less current portion	75	795	75	795	$ 75
Asset retirement obligation, long-term	$ 21,202	$ 15,181	$ 21,202	$ 15,181	$ 17,863

Equity Investments (Investments

Equity Investments (Investments Accounted For By The Equity Method) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Oct. 11, 2012
Schedule of Equity Method Investments [Line Items]
Equity investments and investments in subsidiaries	$ 362,391		$ 362,391		$ 369,581
(Income) loss from equity method investments	$ 15,120	$ (69,569)	$ (4,855)	$ (198,044)
Tatex Thailand II, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Approximate Ownership %	23.50%		23.50%
(Income) loss from equity method investments	$ 0	0	$ 0	0
Tatex Thailand III, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Approximate Ownership %	17.90%		17.90%
Equity investments and investments in subsidiaries	$ 0		$ 0
(Income) loss from equity method investments	$ 189	121	$ 189	170
Grizzly Oil Sands ULC [Member]
Schedule of Equity Method Investments [Line Items]
Approximate Ownership %	24.9999%		24.9999%
Equity investments and investments in subsidiaries	$ 164,113		$ 164,113		180,218
(Income) loss from equity method investments	$ 8,494	2,228	$ 12,636	4,229
Bison Drilling And Field Services LLC [Member]
Schedule of Equity Method Investments [Line Items]
Approximate Ownership %	0.00%		0.00%
(Income) loss from equity method investments	$ 0	(329)	$ 0	1,604
Muskie Proppant LLC [Member]
Schedule of Equity Method Investments [Line Items]
Approximate Ownership %	0.00%		0.00%
(Income) loss from equity method investments	$ 0	(101)	$ 0	433
Timber Wolf Terminals LLC [Member]
Schedule of Equity Method Investments [Line Items]
Approximate Ownership %	50.00%		50.00%
Equity investments and investments in subsidiaries	$ 1,000		$ 1,000		1,013
(Income) loss from equity method investments	$ 7	0	$ 13	0
Windsor Midstream LLC [Member]
Schedule of Equity Method Investments [Line Items]
Approximate Ownership %	22.50%		22.50%
Equity investments and investments in subsidiaries	$ 27,766		$ 27,766		13,505
(Income) loss from equity method investments	$ 881	(35)	$ (17,906)	(203)
Stingray Pressure Pumping LLC [Member]
Schedule of Equity Method Investments [Line Items]
Approximate Ownership %	0.00%		0.00%
(Income) loss from equity method investments	$ 0	1,630	$ 0	2,143
Stingray Cementing LLC [Member]
Schedule of Equity Method Investments [Line Items]
Approximate Ownership %	50.00%		50.00%
Equity investments and investments in subsidiaries	$ 2,002		$ 2,002		2,647
(Income) loss from equity method investments	$ 105	106	$ 172	201
Blackhawk Midstream LLC [Member]
Schedule of Equity Method Investments [Line Items]
Approximate Ownership %	48.50%		48.50%
Equity investments and investments in subsidiaries	$ 0		$ 0		0
(Income) loss from equity method investments	$ 0	0	$ (7,217)	(84,787)
Stingray Logistics LLC [Member]
Schedule of Equity Method Investments [Line Items]
Approximate Ownership %	0.00%		0.00%
Equity investments and investments in subsidiaries	$ 0		$ 0		0
(Income) loss from equity method investments	$ 0	(238)	$ 0	(157)
Diamondback Energy, Inc [Member]
Schedule of Equity Method Investments [Line Items]
Approximate Ownership %	0.00%		0.00%
Equity investments and investments in subsidiaries	$ 0		$ 0		0	$ 138,500
(Income) loss from equity method investments	$ 0	(72,945)	$ 0	(121,712)
Stingray Energy Services LLC [Member]
Schedule of Equity Method Investments [Line Items]
Approximate Ownership %	50.00%		50.00%
Equity investments and investments in subsidiaries	$ 5,905		$ 5,905		$ 5,718
(Income) loss from equity method investments	$ 311	(6)	$ 321	35
Sturgeon Acquisitions LLC [Member]
Schedule of Equity Method Investments [Line Items]
Approximate Ownership %	25.00%		25.00%		25.00%
Equity investments and investments in subsidiaries	$ 22,599		$ 22,599		$ 22,507
(Income) loss from equity method investments	$ (491)	0	$ (1,059)	0
Mammoth Energy Partners LP [Member]
Schedule of Equity Method Investments [Line Items]
Approximate Ownership %	30.50%		30.50%		30.50%
Equity investments and investments in subsidiaries	$ 139,006		$ 139,006		$ 143,973
(Income) loss from equity method investments	$ 5,624	$ 0	$ 7,996	$ 0

Equity Investments (Equity Inve

Equity Investments (Equity Investments Balance Sheet Disclosure) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]
Current assets	$ 170,637	$ 181,060
Noncurrent assets	1,414,991	1,306,891
Current liabilities	96,004	114,506
Noncurrent liabilities	$ 208,319	$ 230,062

Equity Investments (Equity In41

Equity Investments (Equity Investment Income Statement Disclosure) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Equity Method Investments and Joint Ventures [Abstract]
Gross revenue	$ 130,134	$ 220,013	$ 263,690	$ 378,294
Net (loss) income	$ (45,246)	$ 26,099	$ 45,422	$ 207,604

Equity Investments (Narrative)

Equity Investments (Narrative) (Details) a in Thousands, $ in Thousands	Nov. 12, 2014USD ($)shares	Jan. 28, 2014USD ($)	Mar. 31, 2015USD ($)	Sep. 30, 2014USD ($)shares	Jun. 30, 2014shares	Jun. 30, 2015USD ($)	Mar. 31, 2015USD ($)	Jun. 30, 2014USD ($)	Jun. 30, 2015USD ($)ashares	Jun. 30, 2014USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)shares	Dec. 31, 2012	Oct. 11, 2012USD ($)shares
Schedule of Equity Method Investments [Line Items]
Distributions received									$ 4,612	$ 0
Equity investments and investments in subsidiaries						$ 362,391			362,391		$ 369,581
(Income) loss from equity method investments						$ 15,120		$ (69,569)	(4,855)	(198,044)
Payments for equity method investments									$ 8,267	39,162
Apico Llc [Member]
Schedule of Equity Method Investments [Line Items]
Equity shares owned by affiliate (shares) | shares									85,122
Total shares owned of subaffiliate (shares) | shares									1,000,000
Gas and oil area, reserve (acres) | a									243
Tatex Thailand III, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Gas and oil area, reserve (acres) | a									245
Recorded expense during period									$ 200
Ownership interest						17.90%			17.90%
Equity investments and investments in subsidiaries						$ 0			$ 0
(Income) loss from equity method investments						189		121	$ 189	170
Grizzly Oil Sands ULC [Member]
Schedule of Equity Method Investments [Line Items]
Gas and oil area, reserve (acres) | a									830
Cash calls paid									$ 8,300
Increase (decrease) due to foreign currency translation adjustment						$ (3,200)		(6,800)	$ 11,700	500
Ownership interest						24.9999%			24.9999%
Equity investments and investments in subsidiaries						$ 164,113			$ 164,113		180,218
(Income) loss from equity method investments						$ 8,494		2,228	$ 12,636	4,229
Windsor Midstream LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest						22.50%			22.50%
Distributions received									$ 3,600
Equity investments and investments in subsidiaries						$ 27,766			27,766		13,505
(Income) loss from equity method investments						$ 881		(35)	$ (17,906)	(203)
Windsor Midstream LLC [Member] | MidMar Gas LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest													28.40%
Coronado Midstream [Member] | Windsor Midstream LLC [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from sale of interest in partnership unit			$ 600,000
Gain on sale on investment			$ 81,600
Blackhawk Midstream LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest						48.50%			48.50%
Equity investments and investments in subsidiaries						$ 0			$ 0		0
(Income) loss from equity method investments						$ 0		0	$ (7,217)	(84,787)
Blackhawk Midstream LLC [Member] | Ohio Gathering Company, LLC and Ohio Condensate Company, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Purchase price of sold equity interests		$ 190,000
Amount put in escrow		$ 14,300
Distributions received								84,800
Proceeds from release of escrow deposits							$ 7,200
Diamondback Energy, Inc [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest						0.00%			0.00%
Investment (shares) | shares														7,914,036
Equity investments and investments in subsidiaries						$ 0			$ 0		$ 0			$ 138,500
Number of shares issued in transaction (shares) | shares	942,000			1,437,500	1,000,000							4,534,536
Proceeds received from sale of stock	$ 60,800			$ 197,600								$ 192,700
(Income) loss from equity method investments						$ 0		(72,945)	$ 0	(121,712)
Sturgeon Acquisitions LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest						25.00%			25.00%		25.00%
Distributions received									$ 1,000
Equity investments and investments in subsidiaries						$ 22,599			22,599		$ 22,507
(Income) loss from equity method investments						$ (491)		0	$ (1,059)	0
Payments for equity method investments											$ 20,700
Mammoth Energy Partners LP [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest						30.50%			30.50%		30.50%
Equity investments and investments in subsidiaries						$ 139,006			$ 139,006		$ 143,973
(Income) loss from equity method investments						$ 5,624		$ 0	$ 7,996	$ 0
Equity investment in Mammoth Energy Partners											$ 143,500

Other Assets (Schedule Of Other

Other Assets (Schedule Of Other Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Schedule of Prepaid Expenses [Line Items]
Plugging and abandonment escrow account on the WCBB properties (Note 9)	$ 3,089	$ 3,097
Certificates of Deposit securing letter of credit	275	275
Prepaid drilling costs	269	483
Loan commitment fees	21,640	15,390
Deposits	34	34
Other	111	117
Other assets	25,418	$ 19,396
Prepaid Expenses and Other Current Assets [Member]
Schedule of Prepaid Expenses [Line Items]
Prepaid taxes	12,100
Prepaid insurance	1,700
Prepaid other expenses	$ 1,400

Long-Term Debt (Break-Down Of L

Long-Term Debt (Break-Down Of Long-Term Debt) (Details) - USD ($) $ in Thousands		Jun. 30, 2015		Dec. 31, 2014		Mar. 31, 2011
Debt Instrument [Line Items]
Unamortized original issue (discount) premium, net (5)	[1]	$ 13,593		$ 14,658
Less: current maturities of long term debt		(1,738)		(168)
Long-term debt, net of current maturities		963,593		716,316
Line of Credit [Member]
Debt Instrument [Line Items]
Long-term debt		0		100,000
Building loans [Member]
Debt Instrument [Line Items]
Long-term debt		1,738	[2]	1,826	[2]	$ 2,400
7.75% Senior Notes [Member]
Debt Instrument [Line Items]
Long-term debt	[3]	600,000		600,000
6.625% Senior Notes [Member]
Debt Instrument [Line Items]
Long-term debt	[4]	350,000		0
Construction Loans [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	$ 0		$ 0
[1]	On June 4, 2015, the Company entered into a construction loan agreement (the "Construction Loan") with InterBank for the construction of a new corporate headquarters in Oklahoma City. The Construction Loan allows for a maximum principal amount of $24.5 million to be drawn. Interest accrues daily on the outstanding principal balance at a fixed rate of 4.50% per annum and is payable on the last day of the month beginning June 30, 2015 through May 31, 2017. Monthly interest and principal payments are due beginning June 30, 2017, with the final payment due June 4, 2025. As of June 30, 2015, the Company had not drawn on this loan.
[2]	In March 2011, the Company entered into a new building loan agreement for the office building it occupies in Oklahoma City, Oklahoma. The new loan agreement refinanced the $2.4 million outstanding under the previous building loan agreement. The new agreement matures in February 2016 and bears interest at the rate of 5.82% per annum. The new building loan requires monthly interest and principal payments of approximately $22,000 and is collateralized by the Oklahoma City office building and associated land.
[3]	On October 17, 2012, the Company issued $250.0 million in aggregate principal amount of senior unsecured notes due 2020 (the "October Notes") to qualified institutional buyers pursuant to Rule 144A under the Securities Act and to certain non-U.S. persons in accordance with Regulation S under the Securities Act (the "October Notes Offering") under an indenture among the Company, its subsidiary guarantors and Wells Fargo Bank, National Association, as the trustee (the "senior note indenture"). On December 21, 2012, the Company issued an additional $50.0 million in aggregate principal amount of senior unsecured notes due 2020 (the "December Notes") to qualified institutional buyers pursuant to Rule 144A under the Securities Act and to certain non-U.S. persons in accordance with Regulation S under the Securities Act ("the December Notes Offering"). The December Notes were issued as additional securities under the senior note indenture. The Company used a portion of the net proceeds from the October Notes Offering to repay all amounts outstanding at such time under its revolving credit facility. The Company used the remaining net proceeds of the October Notes Offering and the net proceeds of the December Notes Offering for general corporate purposes, which included funding a portion of its 2013 capital development plan. The October Notes and the December Notes were exchanged for substantially identical notes in the same aggregate principal amount that were registered under the Securities Act in October 2013 (the "Exchange Notes").On August 18, 2014, the Company issued an additional $300.0 million in aggregate principal amount of senior unsecured notes due 2020 (the "August Notes") to qualified institutional buyers pursuant to Rule 144A under the Securities Act and to certain non-U.S. persons in accordance with Regulation S under the Securities Act ("the August Notes Offering"). The August Notes were issued as additional securities under the senior note indenture. The Company used a portion of the net proceeds from the August Notes Offering to repay all amounts outstanding at such time under its revolving credit facility. The Company intends to use the remaining net proceeds of the August Notes Offering for general corporate purposes, including funding a portion of its 2014 and 2015 capital development plans. The October Notes Offering, December Notes Offering and the August Notes Offering are collectively referred to as the "Notes Offerings" and the Exchange Notes, and the August Notes are collectively referred to as the "Old Notes".In connection with the issuance of the August Notes, the Company and the subsidiary guarantors entered into a registration rights agreement with the initial purchasers on August 18, 2014, pursuant to which the Company and the subsidiary guarantors have agreed to file a registration statement with respect to an offer to exchange the August Notes for a new issue of substantially identical debt securities registered under the Securities Act. The registration statement relating to the exchange offer for the August Notes was filed on November 6, 2014, as amended on February 3, 2015, and declared effective by the SEC on February 4, 2015. The exchange offer for the August Notes was completed in March 2015.Under the senior note indenture relating to the Old Notes, interest on the Old Notes accrues at a rate of 7.75% per annum on the outstanding principal amount from October 17, 2012, payable semi-annually on May 1 and November 1 of each year, commencing on May 1, 2013. The Old Notes are the Company's senior unsecured obligations and rank equally in the right of payment with all of the Company's other senior indebtedness and senior in right of payment to any future subordinated indebtedness. All of the Company's existing and future restricted subsidiaries that guarantee the Company's secured revolving credit facility or certain other debt guarantee the Old Notes; provided, however, that the Old Notes are not guaranteed by Grizzly Holdings, Inc. and will not be guaranteed by any of the Company's future unrestricted subsidiaries. The Company may redeem some or all of the Old Notes at any time on or after November 1, 2016, at the redemption prices listed in the senior note indenture. Prior to November 1, 2016, the Company may redeem the Old Notes at a price equal to 100% of the principal amount plus a “make-whole” premium. In addition, prior to November 1, 2015, the Company may redeem up to 35% of the aggregate principal amount of the Old Notes with the net proceeds of certain equity offerings, provided that at least 65% of the aggregate principal amount of the Old Notes initially issued remains outstanding immediately after such redemption.
[4]	The October Notes were issued at a price of 98.534% resulting in a gross discount of $3.7 million and an effective rate of 8.000%. The December Notes were issued at a price of 101.000% resulting in a gross premium of $0.5 million and an effective rate of 7.531%. The August Notes were issued at a price of 106.000% resulting in a gross premium of $18.0 million and an effective rate of 6.561%. The April Notes were issued at par. The premium and discount are being amortized using the effective interest method.

Long-Term Debt (Narrative) (Det

Long-Term Debt (Narrative) (Details)

Apr. 23, 2014USD ($)

Mar. 31, 2011USD ($)

Jun. 30, 2015USD ($)

Jun. 30, 2014USD ($)

Jun. 30, 2015USD ($)

Jun. 30, 2014USD ($)

Jun. 04, 2015USD ($)

May. 29, 2015USD ($)

Apr. 21, 2015USD ($)

Apr. 10, 2015USD ($)

Dec. 31, 2014USD ($)

Nov. 26, 2014USD ($)

Aug. 18, 2014USD ($)

Apr. 22, 2014USD ($)

Dec. 27, 2013USD ($)

Dec. 21, 2012USD ($)

Oct. 17, 2012USD ($)

Debt Instrument [Line Items]

Interest cost capitalized, undeveloped properties

$ 4,700,000

$ 3,900,000

$ 8,400,000

$ 6,200,000

Minimum [Member]

Debt Instrument [Line Items]

Debt covenant ratio for EBITDAX

3

3

Maximum [Member]

Debt Instrument [Line Items]

Debt covenant ratio for future EBITDAX

3.25

3.25

Debt covenant ratio for reasonable transactions

3.50

3.50

Building Loans [Member]

Debt Instrument [Line Items]

Building loan outstanding amount of building loan refinanced

$ 2,400,000

$ 1,738,000

[1]

$ 1,738,000

[1]

$ 1,826,000

[1]

Stated interest rate

5.82%

Loan, periodic payment

$ 22,000

Senior Notes [Member]

Debt Instrument [Line Items]

Building loan outstanding amount of building loan refinanced

$ 600,000,000

$ 600,000,000

$ 600,000,000

Effective interest rate

6.561%

7.531%

8.00%

Stated interest rate

7.75%

7.75%

7.75%

Discount issue price, price

98.534%

Unamortized discount

$ 3,700,000

Premium issue price, percent

106.00%

101.00%

Unamortized premium

$ 18,000,000

$ 500,000

Construction Loans [Member]

Debt Instrument [Line Items]

Building loan outstanding amount of building loan refinanced

[2]

0

0

0

7.75% Senior Notes [Member]

Debt Instrument [Line Items]

Building loan outstanding amount of building loan refinanced

[3]

600,000,000

600,000,000

$ 600,000,000

Stated interest rate

7.75%

Debt issued

$ 300,000,000

$ 50,000,000

$ 250,000,000

Redemption of principal amount plus aggregate net proceeds

100.00%

7.75% Senior Notes [Member] | Minimum [Member]

Debt Instrument [Line Items]

Percentage of notes required to be outstanding for redemption

65.00%

7.75% Senior Notes [Member] | Maximum [Member]

Debt Instrument [Line Items]

Redemption of principal amount plus aggregate net proceeds

35.00%

Amended And Restated Credit Agreement [Member] | Construction Loans [Member]

Debt Instrument [Line Items]

Debt instrument, amount

$ 30,000,000

6.625% Senior Notes [Member] | Senior Notes [Member]

Debt Instrument [Line Items]

Building loan outstanding amount of building loan refinanced

$ 343,600,000

Stated interest rate

6.625%

Letter of Credit [Member]

Debt Instrument [Line Items]

Revolving credit facility

125,000,000

Letter of Credit [Member] | Amended And Restated Credit Agreement [Member]

Debt Instrument [Line Items]

Revolving credit facility

$ 150,000,000

Credit facility outstanding

92,700,000

92,700,000

Remaining borrowing capacity

$ 482,300,000

482,300,000

Nova Scotia, Amegy, KeyBank [Member]

Debt Instrument [Line Items]

Revolving credit facility

$ 1,500,000,000

Borrowing capacity

$ 275,000,000

$ 575,000,000

$ 450,000,000

$ 150,000,000

Line of credit, unsecured debt issuance restriction

$ 1,200,000,000

Nova Scotia, Amegy, KeyBank [Member] | Base Rate Loans [Member]

Debt Instrument [Line Items]

Applicable rate, minimum

0.50%

Applicable rate, maximum

1.50%

Nova Scotia, Amegy, KeyBank [Member] | Base Rate Loans [Member] | Federal Funds Rate [Member]

Debt Instrument [Line Items]

Basis spread

0.50%

Nova Scotia, Amegy, KeyBank [Member] | Base Rate Loans [Member] | Eurodollar [Member]

Debt Instrument [Line Items]

Basis spread

1.00%

Nova Scotia, Amegy, KeyBank [Member] | Euro Dollar Loans [Member]

Debt Instrument [Line Items]

Applicable rate, minimum

1.50%

Applicable rate, maximum

2.50%

Nova Scotia, Amegy, KeyBank [Member] | Letter of Credit [Member]

Debt Instrument [Line Items]

Borrowing capacity

$ 70,000,000

$ 125,000,000

$ 20,000,000

Debt covenant ratio for EBITDAX

2

Nova Scotia, Amegy, KeyBank [Member] | Letter of Credit [Member] | Second Amendment of Restated Credit Agreement [Member]

Debt Instrument [Line Items]

Debt covenant ratio for EBITDAX

3.50

Debt covenant ratio for future EBITDAX

3.25

Disposition costs, maximum expenses allowed

$ 3,000,000

InterBank [Member] | Line of Credit [Member] | Construction Loans [Member]

Debt Instrument [Line Items]

Revolving credit facility

$ 24,500,000

Stated interest rate

450.00%

[1]

In March 2011, the Company entered into a new building loan agreement for the office building it occupies in Oklahoma City, Oklahoma. The new loan agreement refinanced the $2.4 million outstanding under the previous building loan agreement. The new agreement matures in February 2016 and bears interest at the rate of 5.82% per annum. The new building loan requires monthly interest and principal payments of approximately $22,000 and is collateralized by the Oklahoma City office building and associated land.

[2]

On June 4, 2015, the Company entered into a construction loan agreement (the "Construction Loan") with InterBank for the construction of a new corporate headquarters in Oklahoma City. The Construction Loan allows for a maximum principal amount of $24.5 million to be drawn. Interest accrues daily on the outstanding principal balance at a fixed rate of 4.50% per annum and is payable on the last day of the month beginning June 30, 2015 through May 31, 2017. Monthly interest and principal payments are due beginning June 30, 2017, with the final payment due June 4, 2025. As of June 30, 2015, the Company had not drawn on this loan.

[3]

On October 17, 2012, the Company issued $250.0 million in aggregate principal amount of senior unsecured notes due 2020 (the "October Notes") to qualified institutional buyers pursuant to Rule 144A under the Securities Act and to certain non-U.S. persons in accordance with Regulation S under the Securities Act (the "October Notes Offering") under an indenture among the Company, its subsidiary guarantors and Wells Fargo Bank, National Association, as the trustee (the "senior note indenture"). On December 21, 2012, the Company issued an additional $50.0 million in aggregate principal amount of senior unsecured notes due 2020 (the "December Notes") to qualified institutional buyers pursuant to Rule 144A under the Securities Act and to certain non-U.S. persons in accordance with Regulation S under the Securities Act ("the December Notes Offering"). The December Notes were issued as additional securities under the senior note indenture. The Company used a portion of the net proceeds from the October Notes Offering to repay all amounts outstanding at such time under its revolving credit facility. The Company used the remaining net proceeds of the October Notes Offering and the net proceeds of the December Notes Offering for general corporate purposes, which included funding a portion of its 2013 capital development plan. The October Notes and the December Notes were exchanged for substantially identical notes in the same aggregate principal amount that were registered under the Securities Act in October 2013 (the "Exchange Notes").On August 18, 2014, the Company issued an additional $300.0 million in aggregate principal amount of senior unsecured notes due 2020 (the "August Notes") to qualified institutional buyers pursuant to Rule 144A under the Securities Act and to certain non-U.S. persons in accordance with Regulation S under the Securities Act ("the August Notes Offering"). The August Notes were issued as additional securities under the senior note indenture. The Company used a portion of the net proceeds from the August Notes Offering to repay all amounts outstanding at such time under its revolving credit facility. The Company intends to use the remaining net proceeds of the August Notes Offering for general corporate purposes, including funding a portion of its 2014 and 2015 capital development plans. The October Notes Offering, December Notes Offering and the August Notes Offering are collectively referred to as the "Notes Offerings" and the Exchange Notes, and the August Notes are collectively referred to as the "Old Notes".In connection with the issuance of the August Notes, the Company and the subsidiary guarantors entered into a registration rights agreement with the initial purchasers on August 18, 2014, pursuant to which the Company and the subsidiary guarantors have agreed to file a registration statement with respect to an offer to exchange the August Notes for a new issue of substantially identical debt securities registered under the Securities Act. The registration statement relating to the exchange offer for the August Notes was filed on November 6, 2014, as amended on February 3, 2015, and declared effective by the SEC on February 4, 2015. The exchange offer for the August Notes was completed in March 2015.Under the senior note indenture relating to the Old Notes, interest on the Old Notes accrues at a rate of 7.75% per annum on the outstanding principal amount from October 17, 2012, payable semi-annually on May 1 and November 1 of each year, commencing on May 1, 2013. The Old Notes are the Company's senior unsecured obligations and rank equally in the right of payment with all of the Company's other senior indebtedness and senior in right of payment to any future subordinated indebtedness. All of the Company's existing and future restricted subsidiaries that guarantee the Company's secured revolving credit facility or certain other debt guarantee the Old Notes; provided, however, that the Old Notes are not guaranteed by Grizzly Holdings, Inc. and will not be guaranteed by any of the Company's future unrestricted subsidiaries. The Company may redeem some or all of the Old Notes at any time on or after November 1, 2016, at the redemption prices listed in the senior note indenture. Prior to November 1, 2016, the Company may redeem the Old Notes at a price equal to 100% of the principal amount plus a “make-whole” premium. In addition, prior to November 1, 2015, the Company may redeem up to 35% of the aggregate principal amount of the Old Notes with the net proceeds of certain equity offerings, provided that at least 65% of the aggregate principal amount of the Old Notes initially issued remains outstanding immediately after such redemption.

Common Stock And Changes In C46

Common Stock And Changes In Capitalization (Details) - USD ($) $ in Thousands	Jun. 12, 2015	Apr. 21, 2015	Jun. 30, 2015	Jun. 30, 2014
Class of Stock [Line Items]
Proceeds from issuance of common stock, net of offering costs and exercise of stock options	$ 479,800	$ 501,900	$ 981,866	$ 648
Common Stock [Member]
Class of Stock [Line Items]
Stock issued in underwritten public offering (in shares)	11,500,000	10,925,000	22,425,000
Common Stock [Member] | Underwritten Public Offering [Member]
Class of Stock [Line Items]
Stock issued in underwritten public offering (in shares)	1,500,000	1,425,000

Stock-Based Compensation (Narra

Stock-Based Compensation (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Share-based Compensation [Abstract]
Stock-based compensation expense	$ 3,200	$ 3,400	$ 6,700	$ 7,700
Capitalized stock-based compensation	1,300	$ 1,300	2,694	$ 3,066
Unrecognized compensation expense	$ 15,400		$ 15,400
Weighted average period			1 year 6 months 7 days

Stock-Based Compensation (Summa

Stock-Based Compensation (Summary Of Stock Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding at beginning of period, Shares	5,000
Granted, Shares	0
Exercised, Shares	0
Forfeited/expired, Shares	0
Options Outstanding end of period, Shares	5,000	5,000
Options exercisable at end of period, Shares	5,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Options outstanding at beginning of period, Weighted Average Exercise Price per Share (usd per share)	$ 9.07
Granted, Weighted Average Exercise Price per Share (usd per share)	0
Exercised, Weighted Average Exercise Price per Share (usd per share)	0
Forfeited/expired, Weighted Average Exercise Price per Share (usd per share)	0
Options outstanding end of period, Weighted Average Exercise Price per Share (usd per share)	9.07	$ 9.07
Options exercisable at end of period, Weighted Average Exercise Price per Share (usd per share)	$ 9.07
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	2 months 8 days	8 months 8 days
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	2 months 8 days	8 months 8 days
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	2 months 8 days
Options outstanding, Aggregate Intrinsic Value at beginning of period	$ 163
Options outstanding, Aggregate Intrinsic Value at end of period	156	$ 163
Options exercisable at end of period, Aggregate Intrinsic Value	$ 156

Stock-Based Compensation (Sum49

Stock-Based Compensation (Summary Of Stock Option Plans By Exercise Price) (Details) - Jun. 30, 2015 - $ / shares	Total
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number Outstanding (shares)	5,000
Number Exercisable (shares)	5,000
Exercise Price $9.07 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price (usd per share)	$ 9.07
Number Outstanding (shares)	5,000
Weighted Average Remaining Life (in years)	2 months 8 days
Number Exercisable (shares)	5,000

Stock-Based Compensation (Sum50

Stock-Based Compensation (Summary Of Restricted Stock Award And Unit Activity) (Details) - 6 months ended Jun. 30, 2015 - Restricted Stock [Member] - $ / shares	Total
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of Unvested Restricted Shares, beginning of period (shares)	387,245
Granted, Number of Unvested Restricted Shares (shares)	100,226
Vested, Number of Unvested Restricted Shares (shares)	(123,543)
Forfeited, Number of Unvested Restricted Shares (shares)	(4,000)
Number of Unvested Restricted Shares, end of period (shares)	359,928
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Unvested Restricted Shares, Weighted Average Grant Date Fair Value, beginning of period (usd per share)	$ 55.87
Granted, Weighted Average Grant Date Fair Value (usd per share)	44.04
Vested, Weighted Average Grant Date Fair Value (usd per share)	51.02
Forfeited, Weighted Average Grant Date Fair Value (usd per share)	57.91
Unvested Restricted stock, Weighted Average Grant Date Fair Value, end of period (usd per share)	$ 54.22

Earnings Per Share (Schedule Of

Earnings Per Share (Schedule Of Earnings Per Share Reconciliation) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Basic, Net (loss) income	$ (31,325)	$ 47,852	$ (5,806)	$ 130,410
Effect of dilutive securities, Stock options and awards	0	0	0	0
Diluted, Net (loss) income	$ (31,325)	$ 47,852	$ (5,806)	$ 130,410
Weighted average common shares outstanding - Basic (shares)	96,663,358	85,448,678	91,201,824	85,354,566
Effect of dilutive securities, Stock options and awards (shares)		357,218		412,113
Weighted average common shares outstanding-Diluted (shares)	96,663,358	85,805,896	91,201,824	85,766,679
Basic net (loss) income from continuing operations per share (usd per share)	$ (0.32)	$ 0.56	$ (0.06)	$ 1.53
Diluted net (loss) income from continuing operations per share (usd per share)	$ (0.32)	$ 0.56	$ (0.06)	$ 1.52
Common stock considered anti-dilutive (in shares)	378,550	0	382,494	0

Commitments and Contingencies52

Commitments and Contingencies (Details)	Apr. 29, 2015USD ($)shares	Mar. 13, 2015	Nov. 01, 2012	Mar. 11, 1997USD ($)well	Jun. 30, 2015USD ($)well	Dec. 31, 2014USD ($)
Commitments [Line Items]
Plugging And Abandonment Escrow Account					$ 3,089,000	$ 3,097,000
Employment Agreement, Term			3 years
Employment Agreement, Subsequent Extension			1 year
Employment Agreement, Notice Period Allowed For Termination			90 days
Other Commitment					170,430,000
Chief Executive Officer [Member]
Commitments [Line Items]
Other Commitment					400,000
Employment agreement, annual salary	$ 460,000
Chief Operating Officer [Member]
Commitments [Line Items]
Employment Agreement, Term		2 years
Chief Financial Officer [Member]
Commitments [Line Items]
Employment Agreement, Term		3 years
Management [Member]
Commitments [Line Items]
Other Commitment					$ 1,800,000
WCBB [Member]
Commitments [Line Items]
Purchasing Remaining Percent Interest In Oil And Gas Property				50.00%
Payments Held For Restricted Cash				$ 18,000
Significant Plugging Commitment Minimum Number Of Wells To Be Plugged | well				20
Tenure Of Minimum Wells To Be Plugged				20 years
Number Of Wells Plugged | well					463
Restricted Stock [Member] | Chief Executive Officer [Member]
Commitments [Line Items]
Employment agreement, annual grant (in shares) | shares	40,000
Employment agreement, percent of salary awarded in shares	500.00%

Commitments and Contingencies53

Commitments and Contingencies (Future Minimum Lease Commitments) (Details) $ in Thousands	Jun. 30, 2015USD ($)
Commitments and Contingencies Disclosure [Abstract]
Remaining 2,015	$ 332
2,016	617
2,017	513
2,018	20
2,019	0
Total	$ 1,482

Commitments and Contingencies54

Commitments and Contingencies (Other Commitment Payments) (Details) $ in Thousands	Jun. 30, 2015USD ($)
Commitments and Contingencies Disclosure [Abstract]
Remaining 2,015	$ 26,220
2,016	52,440
2,017	52,440
2,018	39,330
Total other commitment	$ 170,430

Hedging Activities (Narrative)

Hedging Activities (Narrative) (Details) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)	Dec. 31, 2014financial_institution
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
Number of financial institutions | financial_institution					4
Gain (loss) on fair value hedges recognized in earnings	$ 34.6	$ 2.2	$ (3.3)	$ (6.4)

Hedging Activities (Schedule Of

Hedging Activities (Schedule Of Derivative Instruments) (Details) - Jun. 30, 2015	MMBTU / dbbl / d$ / bbl$ / MMBTU
Fixed Price Swap, July 2015 Through December 2016 [Member]
Derivative [Line Items]
Daily Volume | MMBTU / d	40,000
Weighted Average Price	0.02
Fixed Price Swap, July 2015 through June 2016 [Member]
Derivative [Line Items]
Daily Volume | bbl / d	2,500
Weighted Average Price | $ / bbl	62.38
Fixed Price Swap, July through August 2015 [Member]
Derivative [Line Items]
Daily Volume | MMBTU / d	256,875
Weighted Average Price	3.87
Fixed Price Swap, September 2015 [Member]
Derivative [Line Items]
Daily Volume | MMBTU / d	286,875
Weighted Average Price	3.82
Fixed Price Swap, October through December 2015 [Member]
Derivative [Line Items]
Daily Volume | MMBTU / d	322,500
Weighted Average Price	3.79
Fixed Price Swap, November through December 2015 [Member]
Derivative [Line Items]
Daily Volume | MMBTU / d	282,500
Weighted Average Price	3.91
Fixed Price Swap, January through March 2016 [Member]
Derivative [Line Items]
Daily Volume | MMBTU / d	312,500
Weighted Average Price	3.73
Fixed Price Swap, April 2016 [Member]
Derivative [Line Items]
Daily Volume | MMBTU / d	302,500
Weighted Average Price	3.72
Fixed Price Swap, May through December 2016 [Member]
Derivative [Line Items]
Daily Volume | MMBTU / d	232,500
Weighted Average Price	3.63
Fixed Price Swap, January through June 2017 [Member]
Derivative [Line Items]
Daily Volume | MMBTU / d	182,500
Weighted Average Price	3.59
Fixed Price Swap, July through December 2017 [Member]
Derivative [Line Items]
Daily Volume | MMBTU / d	120,000
Weighted Average Price	3.40
Fixed Price Swap, January through December 2018 [Member]
Derivative [Line Items]
Daily Volume | MMBTU / d	70,000
Weighted Average Price	3.35
Fixed Price Swap, January Through March 2019 [Member]
Derivative [Line Items]
Daily Volume | MMBTU / d	20,000
Weighted Average Price	3.37

Hedging Activities (Schedule 57

Hedging Activities (Schedule Of Derivative Instruments In Statement Of Financial Position) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
Short-term derivative instruments - asset	$ 77,350	$ 78,391
Long-term derivative instruments - asset	25,871	24,448
Short-term derivative instruments - liability	937
Long-term derivative instrument	$ 2,753	$ 0

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset retirement obligation capitalized	$ 4,077	$ 3,613
Mammoth Energy Partners LP [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investment			$ 143,500
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Instruments	103,221
Derivative Instruments	3,690
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Instruments	0
Derivative Instruments	0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Instruments	0
Derivative Instruments	0
Asset retirement obligation capitalized	$ 4,100
Level 3 [Member] | Mammoth Energy Partners LP [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investment			$ 143,500

Fair Value of Financial Instr59

Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Jun. 30, 2015	Aug. 18, 2014	Dec. 21, 2012	Oct. 17, 2012
Debt Instrument [Line Items]
Fair value of notes	$ 989.8
October Notes [Member]
Debt Instrument [Line Items]
Unamortized discount	2.7
December Notes [Member]
Debt Instrument [Line Items]
Unamortized premium	0.4
August Notes [Member]
Debt Instrument [Line Items]
Unamortized premium	15.9
Senior Notes [Member]
Debt Instrument [Line Items]
Carrying value of debt	$ 963.6
Unamortized discount				$ 3.7
Unamortized premium		$ 18	$ 0.5

Condensed Consolidating Finan60

Condensed Consolidating Financial Information - (Details) - Senior Notes [Member] - USD ($)	Aug. 18, 2014	Dec. 21, 2012	Oct. 17, 2012
Condensed Financial Statements, Captions [Line Items]
Long-term debt	$ 600,000,000	$ 600,000,000	$ 600,000,000
Stated interest rate	7.75%	7.75%	7.75%

Condensed Consolidating Finan61

Condensed Consolidating Financial Information - Condensed Consolidating Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 525,488	$ 142,340	$ 75,293	$ 458,956
Restricted cash	75,005	0
Accounts receivable—oil and gas	86,621	103,858
Accounts receivable - related parties	90	46
Accounts receivable - intercompany		0
Prepaid expenses and other current assets	15,168	3,714
Short-term derivative instruments	77,350	78,391
Total current assets	779,722	328,349
Property and equipment:
Oil and natural gas properties	4,798,835	3,923,154
Other property and equipment	22,930	18,344
Accumulated depletion, depreciation, amortization and impairment	(1,211,308)	(1,050,879)
Property and equipment, net	3,610,457	2,890,619
Other assets:
Equity investments and investments in subsidiaries	362,391	369,581
Derivative instruments	25,871	24,448
Other assets	25,418	19,396
Total other assets	413,680	413,425
Total assets	4,803,859	3,632,393
Current liabilities:
Accounts payable and accrued liabilities	318,725	371,410
Accounts payable - intercompany	0	0
Asset retirement obligation—current	75	75	795
Short-term derivative instruments	937
Deferred tax liability - current	26,508	27,070
Current maturities of long-term debt	1,738	168
Total current liabilities	347,983	398,723
Long-term derivative instrument	2,753	0
Asset retirement obligation—long-term	21,202	17,863	15,181
Deferred tax liability	201,022	203,195
Long-term debt, net of current maturities	963,593	716,316
Total liabilities	1,536,553	1,336,097
Stockholders’ equity:
Common stock	1,081	856
Paid-in capital	2,816,930	1,828,602
Accumulated other comprehensive income (loss)	(38,412)	(26,675)
Retained earnings (accumulated deficit)	487,707	493,513
Total stockholders’ equity	3,267,306	2,296,296	2,188,499	2,050,238
Total liabilities and stockholders’ equity	4,803,859	3,632,393
Parent [Member]
Current assets:
Cash and cash equivalents	524,240	141,535	72,921	451,431
Restricted cash	75,005
Accounts receivable—oil and gas	86,558	103,762
Accounts receivable - related parties	90	46
Accounts receivable - intercompany	48,401	45,222
Prepaid expenses and other current assets	15,168	3,714
Short-term derivative instruments	77,350	78,391
Total current assets	826,812	372,670
Property and equipment:
Oil and natural gas properties	4,760,793	3,887,874
Other property and equipment	22,887	18,301
Accumulated depletion, depreciation, amortization and impairment	(1,211,281)	(1,050,855)
Property and equipment, net	3,572,399	2,855,320
Other assets:
Equity investments and investments in subsidiaries	353,243	360,238
Derivative instruments	25,871	24,448
Other assets	25,418	19,396
Total other assets	404,532	404,082
Total assets	4,803,743	3,632,072
Current liabilities:
Accounts payable and accrued liabilities	318,609	371,089
Accounts payable - intercompany	0	0
Asset retirement obligation—current	75	75
Short-term derivative instruments	937
Deferred tax liability - current	26,508	27,070
Current maturities of long-term debt	1,738	168
Total current liabilities	347,867	398,402
Long-term derivative instrument	2,753
Asset retirement obligation—long-term	21,202	17,863
Deferred tax liability	201,022	203,195
Long-term debt, net of current maturities	963,593	716,316
Total liabilities	1,536,437	1,335,776
Stockholders’ equity:
Common stock	1,081	856
Paid-in capital	2,816,930	1,828,602
Accumulated other comprehensive income (loss)	(38,412)	(26,675)
Retained earnings (accumulated deficit)	487,707	493,513
Total stockholders’ equity	3,267,306	2,296,296
Total liabilities and stockholders’ equity	4,803,743	3,632,072
Guarantors [Member]
Current assets:
Cash and cash equivalents	1,247	804	2,371	7,525
Accounts receivable—oil and gas	63	96
Accounts receivable - related parties	0	0
Accounts receivable - intercompany	55	27
Prepaid expenses and other current assets		0
Short-term derivative instruments	0	0
Total current assets	1,365	927
Property and equipment:
Oil and natural gas properties	38,771	35,990
Other property and equipment	43	43
Accumulated depletion, depreciation, amortization and impairment	(27)	(24)
Property and equipment, net	38,787	36,009
Other assets:
Equity investments and investments in subsidiaries		0
Derivative instruments	0	0
Other assets		0
Total assets	40,152	36,936
Current liabilities:
Accounts payable and accrued liabilities	116	321
Accounts payable - intercompany	48,326	45,143
Asset retirement obligation—current		0
Deferred tax liability - current		0
Current maturities of long-term debt		0
Total current liabilities	48,442	45,464
Long-term derivative instrument	0
Asset retirement obligation—long-term	0	0
Deferred tax liability		0
Long-term debt, net of current maturities	0	0
Total liabilities	48,442	45,464
Stockholders’ equity:
Common stock		0
Paid-in capital	322	322
Accumulated other comprehensive income (loss)		0
Retained earnings (accumulated deficit)	(8,612)	(8,850)
Total stockholders’ equity	(8,290)	(8,528)
Total liabilities and stockholders’ equity	40,152	36,936
Non-Guarantor [Member]
Current assets:
Cash and cash equivalents	1	1	1	0
Restricted cash	0
Accounts receivable—oil and gas	0	0
Accounts receivable - related parties	0	0
Accounts receivable - intercompany	0	0
Prepaid expenses and other current assets	0	0
Short-term derivative instruments	0	0
Total current assets	1	1
Property and equipment:
Oil and natural gas properties		0
Other property and equipment		0
Accumulated depletion, depreciation, amortization and impairment		0
Property and equipment, net		0
Other assets:
Equity investments and investments in subsidiaries	164,112	180,217
Derivative instruments	0	0
Other assets		0
Total other assets	164,112	180,217
Total assets	164,113	180,218
Current liabilities:
Accounts payable and accrued liabilities		0
Accounts payable - intercompany	130	106
Asset retirement obligation—current		0
Deferred tax liability - current		0
Current maturities of long-term debt		0
Total current liabilities	130	106
Long-term derivative instrument	0
Asset retirement obligation—long-term	0	0
Deferred tax liability		0
Long-term debt, net of current maturities	0	0
Total liabilities	130	106
Stockholders’ equity:
Common stock		0
Paid-in capital	235,347	227,079
Accumulated other comprehensive income (loss)	(38,412)	(26,675)
Retained earnings (accumulated deficit)	(32,952)	(20,292)
Total stockholders’ equity	163,983	180,112
Total liabilities and stockholders’ equity	164,113	180,218
Eliminations [Member]
Current assets:
Cash and cash equivalents	0	0	$ 0	$ 0
Restricted cash	0
Accounts receivable—oil and gas		0
Accounts receivable - related parties	0	0
Accounts receivable - intercompany	(48,456)	(45,249)
Prepaid expenses and other current assets		0
Short-term derivative instruments	0	0
Total current assets	(48,456)	(45,249)
Property and equipment:
Oil and natural gas properties	(729)	(710)
Other property and equipment		0
Accumulated depletion, depreciation, amortization and impairment		0
Property and equipment, net	(729)	(710)
Other assets:
Equity investments and investments in subsidiaries	(154,964)	(170,874)
Derivative instruments	0	0
Other assets		0
Total other assets	(154,964)	(170,874)
Total assets	(204,149)	(216,833)
Current liabilities:
Accounts payable and accrued liabilities		0
Accounts payable - intercompany	(48,456)	(45,249)
Asset retirement obligation—current		0
Deferred tax liability - current		0
Current maturities of long-term debt		0
Total current liabilities	(48,456)	(45,249)
Long-term derivative instrument	0
Asset retirement obligation—long-term	0	0
Deferred tax liability		0
Long-term debt, net of current maturities	0	0
Total liabilities	(48,456)	(45,249)
Stockholders’ equity:
Common stock		0
Paid-in capital	(235,669)	(227,401)
Accumulated other comprehensive income (loss)	38,412	26,675
Retained earnings (accumulated deficit)	41,564	29,142
Total stockholders’ equity	(155,693)	(171,584)
Total liabilities and stockholders’ equity	$ (204,149)	$ (216,833)

Condensed Consolidating Finan62

Condensed Consolidating Financial Information - Condensed Consolidating Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues:
Total revenues	$ 112,270	$ 114,736	$ 288,587	$ 232,765
Costs and expenses:
Lease operating expenses	16,863	12,680	33,843	24,309
Production taxes	3,285	6,601	7,570	13,558
Midstream gathering and processing	32,904	10,780	58,285	18,549
Depreciation, depletion and amortization	71,155	55,994	161,064	112,871
General and administrative	9,515	10,382	20,314	19,893
Accretion expense	192	189	382	377
Gain on sale of assets	0	0	0	(11)
Total costs and expenses	133,914	96,626	281,458	189,546
(LOSS) INCOME FROM OPERATIONS	(21,644)	18,110	7,129	43,219
OTHER (INCOME) EXPENSE:
Interest expense	12,023	2,402	20,782	6,287
Interest income	(248)	(36)	(257)	(142)
Litigation settlement	0	6,000	0	24,000
Loss (income) from equity method investments	15,120	(69,569)	(4,855)	(198,044)
Total Other (Income) Expense	26,895	(61,203)	15,670	(167,899)
(LOSS) INCOME BEFORE INCOME TAXES	(48,539)	79,313	(8,541)	211,118
INCOME TAX (BENEFIT) EXPENSE	(17,214)	31,461	(2,735)	80,708
NET (LOSS) INCOME	(31,325)	47,852	(5,806)	130,410
Parent [Member]
Revenues:
Total revenues	112,027	114,014	287,859	231,864
Costs and expenses:
Lease operating expenses	16,685	12,457	33,472	23,838
Production taxes	3,260	6,529	7,513	13,466
Midstream gathering and processing	32,892	10,758	58,266	18,515
Depreciation, depletion and amortization	71,154	55,993	161,062	112,870
General and administrative	9,488	10,346	20,249	19,834
Accretion expense	192	189	382	377
Gain on sale of assets				(11)
Total costs and expenses	133,671	96,272	280,944	188,889
(LOSS) INCOME FROM OPERATIONS	(21,644)	17,742	6,915	42,975
OTHER (INCOME) EXPENSE:
Interest expense	12,023	2,402	20,782	6,287
Interest income	(248)	(36)	(257)	(142)
Litigation settlement		6,000		24,000
Loss (income) from equity method investments	15,120	(69,937)	(5,069)	(198,288)
Total Other (Income) Expense	26,895	(61,571)	15,456	(168,143)
(LOSS) INCOME BEFORE INCOME TAXES	(48,539)	79,313	(8,541)	211,118
INCOME TAX (BENEFIT) EXPENSE	(17,214)	31,461	(2,735)	80,708
NET (LOSS) INCOME	(31,325)	47,852	(5,806)	130,410
Guarantors [Member]
Revenues:
Total revenues	243	722	728	901
Costs and expenses:
Lease operating expenses	178	223	371	471
Production taxes	25	72	57	92
Midstream gathering and processing	12	22	19	34
Depreciation, depletion and amortization	1	1	2	1
General and administrative	5	35	41	62
Accretion expense	0	0	0	0
Gain on sale of assets				0
Total costs and expenses	221	353	490	660
(LOSS) INCOME FROM OPERATIONS	22	369	238	241
OTHER (INCOME) EXPENSE:
Interest expense	0	0	0	0
Interest income	0	0	0	0
Litigation settlement		0		0
Loss (income) from equity method investments	0	0	0	0
Total Other (Income) Expense	0	0	0	0
(LOSS) INCOME BEFORE INCOME TAXES	22	369	238	241
INCOME TAX (BENEFIT) EXPENSE	0	0	0	0
NET (LOSS) INCOME	22	369	238	241
Non-Guarantor [Member]
Revenues:
Total revenues	0	0	0	0
Costs and expenses:
Lease operating expenses	0	0	0	0
Production taxes	0	0	0	0
Midstream gathering and processing	0	0	0	0
Depreciation, depletion and amortization	0	0	0	0
General and administrative	22	1	24	(3)
Accretion expense	0	0	0	0
Gain on sale of assets				0
Total costs and expenses	22	1	24	(3)
(LOSS) INCOME FROM OPERATIONS	(22)	(1)	(24)	3
OTHER (INCOME) EXPENSE:
Interest expense	0	0	0	0
Interest income	0	0	0	0
Litigation settlement		0		0
Loss (income) from equity method investments	8,494	2,228	12,636	4,229
Total Other (Income) Expense	8,494	2,228	12,636	4,229
(LOSS) INCOME BEFORE INCOME TAXES	(8,516)	(2,229)	(12,660)	(4,226)
INCOME TAX (BENEFIT) EXPENSE	0	0	0	0
NET (LOSS) INCOME	(8,516)	(2,229)	(12,660)	(4,226)
Eliminations [Member]
Revenues:
Total revenues	0	0	0	0
Costs and expenses:
Lease operating expenses	0	0	0	0
Production taxes	0	0	0	0
Midstream gathering and processing	0	0	0	0
Depreciation, depletion and amortization	0	0	0	0
General and administrative	0	0	0	0
Accretion expense	0	0	0	0
Gain on sale of assets				0
Total costs and expenses	0	0	0	0
(LOSS) INCOME FROM OPERATIONS	0	0	0	0
OTHER (INCOME) EXPENSE:
Interest expense	0	0	0	0
Interest income	0	0	0	0
Litigation settlement		0		0
Loss (income) from equity method investments	(8,494)	(1,860)	(12,422)	(3,985)
Total Other (Income) Expense	(8,494)	(1,860)	(12,422)	(3,985)
(LOSS) INCOME BEFORE INCOME TAXES	8,494	1,860	12,422	3,985
INCOME TAX (BENEFIT) EXPENSE	0	0	0	0
NET (LOSS) INCOME	$ 8,494	$ 1,860	$ 12,422	$ 3,985

Condensed Consolidating Finan63

Condensed Consolidating Financial Information - Condensed Consolidating Statements of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	$ (31,325)	$ 47,852	$ (5,806)	$ 130,410
Foreign currency translation adjustment	3,247	6,816	(11,737)	(462)
Other comprehensive income (loss)	3,247	6,816	(11,737)	(462)
Comprehensive (loss) income	(28,078)	54,668	(17,543)	129,948
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	(31,325)	47,852	(5,806)	130,410
Foreign currency translation adjustment	3,247	6,816	(11,737)	(462)
Other comprehensive income (loss)	3,247	6,816	(11,737)	(462)
Comprehensive (loss) income	(28,078)	54,668	(17,543)	129,948
Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	22	369	238	241
Foreign currency translation adjustment	0	0	0	0
Other comprehensive income (loss)	0	0	0	0
Comprehensive (loss) income	22	369	238	241
Non-Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	(8,516)	(2,229)	(12,660)	(4,226)
Foreign currency translation adjustment	3,247	6,816	(11,737)	(462)
Other comprehensive income (loss)	3,247	6,816	(11,737)	(462)
Comprehensive (loss) income	(5,269)	4,587	(24,397)	(4,688)
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	8,494	1,860	12,422	3,985
Foreign currency translation adjustment	(3,247)	(6,816)	11,737	462
Other comprehensive income (loss)	(3,247)	(6,816)	11,737	462
Comprehensive (loss) income	$ 5,247	$ (4,956)	$ 24,159	$ 4,447

Condensed Consolidating Finan64

Condensed Consolidating Financial Information - Condensed Consolidating Statement of Cash Flows (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 138,874	$ 201,509
Net cash (used in) provided by investing activities	(979,766)	(624,760)
Net cash provided by (used in) financing activities	1,224,040	39,588
Net increase (decrease) in cash and cash equivalents	383,148	(383,663)
Cash and cash equivalents at beginning of period	142,340	458,956
Cash and cash equivalents at end of period	525,488	75,293
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	135,485	203,057
Net cash (used in) provided by investing activities	(976,820)	(621,155)
Net cash provided by (used in) financing activities	1,224,040	39,588
Net increase (decrease) in cash and cash equivalents	382,705	(378,510)
Cash and cash equivalents at beginning of period	141,535	451,431
Cash and cash equivalents at end of period	524,240	72,921
Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	3,389	(1,546)
Net cash (used in) provided by investing activities	(2,946)	(3,608)
Net cash provided by (used in) financing activities	0	0
Net increase (decrease) in cash and cash equivalents	443	(5,154)
Cash and cash equivalents at beginning of period	804	7,525
Cash and cash equivalents at end of period	1,247	2,371
Non-Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(1)	(2)
Net cash (used in) provided by investing activities	(8,267)	(16,569)
Net cash provided by (used in) financing activities	8,268	16,572
Net increase (decrease) in cash and cash equivalents	0	1
Cash and cash equivalents at beginning of period	1	0
Cash and cash equivalents at end of period	1	1
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	1	0
Net cash (used in) provided by investing activities	8,267	16,572
Net cash provided by (used in) financing activities	(8,268)	(16,572)
Net increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	$ 0	$ 0