Gulfport Energy (GPOR) 10-Q 7 Aug 14 2014 Q2 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	6 Months Ended
	Jun. 30, 2014	Aug. 01, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Jun-14	'
Entity Registrant Name	'GULFPORT ENERGY CORP	'
Entity Central Index Key	'0000874499	'
Current Fiscal Year End Date	'--12-31	'
Document Fiscal Year Focus	'2014	'
Entity Filer Category	'Large Accelerated Filer	'
Document Fiscal Period Focus	'Q2	'
Entity Common Stock, Shares Outstanding	'	85,499,465

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$75,293	$458,956
Accounts receivable—oil and gas	107,455	58,824
Accounts receivable—related parties	127	2,617
Prepaid expenses and other current assets	3,575	2,581
Deferred tax asset	7,661	6,927
Short-term derivative instruments	'	324
Note receivable - related party	875	875
Total current assets	194,986	531,104
Property and equipment:	'	'
Oil and natural gas properties, full-cost accounting, $1,187,637 and $950,590 excluded from amortization in 2014 and 2013, respectively	3,201,529	2,477,178
Other property and equipment	12,605	11,131
Accumulated depletion, depreciation, amortization and impairment	-897,553	-784,717
Property and equipment, net	2,316,581	1,703,592
Other assets:	'	'
Equity investments ($211,300 and $178,708 attributable to fair value option in 2014 and 2013, respectively)	501,436	440,068
Derivative instruments	784	521
Other assets	17,985	17,851
Total other assets	520,205	458,440
Total assets	3,031,772	2,693,136
Current liabilities:	'	'
Accounts payable and accrued liabilities	287,458	190,707
Asset retirement obligation—current	795	795
Short-term derivative instruments	24,532	12,280
Current maturities of long-term debt	163	159
Total current liabilities	312,948	203,941
Long-term derivative instrument	5,487	11,366
Asset retirement obligation—long-term	15,181	14,288
Deferred tax liability	170,559	114,275
Long-term debt, net of current maturities	339,098	299,028
Total liabilities	843,273	642,898
Commitments and contingencies (Note 8)	'	'
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, 85,494,966 issued and outstanding in 2014 and 85,177,532 in 2013	854	851
Paid-in capital	1,821,368	1,813,058
Accumulated other comprehensive loss	-10,243	-9,781
Retained earnings	376,520	246,110
Total stockholders’ equity	2,188,499	2,050,238
Total liabilities and stockholders’ equity	$3,031,772	$2,693,136

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	3 Months Ended	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]	'	'
Capitalized costs of oil and natural gas properties excluded from amortization	$1,187,637	$950,590
Equity investments attributable to fair value option	$211,300	$178,708
Preferred stock, par value (usd per share)	$0.01	$0.01
Preferred stock, shares authorized (shares)	5,000,000	5,000,000
Temporary Equity, Shares Authorized (shares)	30,000	30,000
Preferred stock dividend rate	12.00%	12.00%
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)	85,494,966	85,177,532
Common Stock, Shares, Outstanding (shares)	85,494,966	85,177,532

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues:	'	'	'	'
Oil and condensate sales	$68,078	$60,999	$141,455	$114,079
Gas sales	35,522	6,793	53,871	8,259
Natural gas liquid sales	10,897	2,404	37,033	2,728
Other income	239	238	406	368
Total revenues	114,736	70,434	232,765	125,434
Costs and expenses:	'	'	'	'
Lease operating expenses	12,680	5,878	24,309	11,050
Production taxes	6,601	6,440	13,558	13,310
Midstream processing and marketing	10,780	1,901	18,549	2,318
Depreciation, depletion and amortization	55,994	28,540	112,871	51,123
General and administrative	10,382	4,900	19,893	9,312
Accretion expense	189	174	377	349
(Gain) loss on sale of assets	0	145	-11	572
Total costs and expenses	96,626	47,978	189,546	88,034
INCOME FROM OPERATIONS	18,110	22,456	43,219	37,400
OTHER (INCOME) EXPENSE:	'	'	'	'
Interest expense	2,402	3,284	6,287	6,763
Interest income	-36	-62	-142	-141
Litigation settlement	6,000	0	24,000	0
Income from equity method investments	-69,569	-50,108	-198,044	-111,318
Total Other (Income) Expense	-61,203	-46,886	-167,899	-104,696
INCOME BEFORE INCOME TAXES	79,313	69,342	211,118	142,096
INCOME TAX EXPENSE	31,461	25,514	80,708	53,709
NET INCOME	$47,852	$43,828	$130,410	$88,387
NET INCOME PER COMMON SHARE:	'	'	'	'
Basic net income per share	$0.56	$0.57	$1.53	$1.18
Diluted net income per share	$0.56	$0.56	$1.52	$1.17
Weighted average common shares outstanding - Basic (shares)	85,448,678	77,428,605	85,354,566	75,142,113
Weighted average common shares outstanding-Diluted (shares)	85,805,896	77,906,787	85,766,679	75,599,608

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Statement of Comprehensive Income [Abstract]	'		'		'		'
Net income	$47,852		$43,828		$130,410		$88,387
Foreign currency translation adjustment	6,816		-6,113		-462		-9,680
Change in fair value of derivative instruments	0	[1]	356	[1]	0	[1]	-1,074	[1]
Reclassification of settled contracts	0	[2]	1,404	[2]	0	[2]	3,201	[2]
Other comprehensive income (loss)	6,816		-4,353		-462		-7,553
Comprehensive income	$54,668		$39,475		$129,948		$80,834
[1]	Net of $0.0 million and $0.0 million in taxes for the three and six months ended June 30, 2014, respectively, and net of $0.2 million and $(0.7) million in taxes for the three and six months ended June 30, 2013, respectively.
[2]	Net of $0.0 million and $0.0 million in taxes for the three and six months ended June 30, 2014, respectively, and net of $0.9 million and $2.0 million in taxes for the three and six months ended June 30, 2013, respectively.

Consolidated_Statements_of_Com1

Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]	'	'	'	'
Change in fair value of derivative instruments, tax	$0	$0.20	$0	($0.70)
Reclassification of settled contracts, tax	$0	$0.90	$0	$2

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]
In Thousands, except Share data, unless otherwise specified
Balance, value at Dec. 31, 2012	$1,126,408	$674	$1,036,245	($3,429)	$92,918
Balance, shares at Dec. 31, 2012	'	67,527,386	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'
Net income	88,387	'	'	'	88,387
Other Comprehensive Loss	-7,553	'	'	-7,553	'
Stock Compensation	3,004	'	3,004	'	'
Issuance of Common Stock in public offering, net of related expenses, shares	'	9,812,500	'	'	'
Issuance of Common Stock in public offering, net of related expenses, value	357,640	99	357,541	'	'
Issuance of Restricted Stock, shares	'	82,720	'	'	'
Issuance of Restricted Stock, value	0	1	-1	'	'
Issuance of Common Stock through exercise of options, shares	'	125,000	'	'	'
Issuance of Common Stock through exercise of options, value	1,400	1	1,399	'	'
Balance, value at Jun. 30, 2013	1,569,286	775	1,398,188	-10,982	181,305
Balance, shares at Jun. 30, 2013	'	77,547,606	'	'	'
Balance, value at Dec. 31, 2013	2,050,238	851	1,813,058	-9,781	246,110
Balance, shares at Dec. 31, 2013	85,177,532	85,177,532	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'
Net income	130,410	'	'	'	130,410
Other Comprehensive Loss	-462	'	'	-462	'
Stock Compensation	7,665	'	7,665	'	'
Issuance of Restricted Stock, shares	'	124,526	'	'	'
Issuance of Restricted Stock, value	0	1	-1	'	'
Issuance of Common Stock through exercise of options, shares	192,908	192,908	'	'	'
Issuance of Common Stock through exercise of options, value	648	2	646	'	'
Balance, value at Jun. 30, 2014	$2,188,499	$854	$1,821,368	($10,243)	$376,520
Balance, shares at Jun. 30, 2014	85,494,966	85,494,966	'	'	'

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:	'	'
Net income	$130,410	$88,387
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Accretion of discount—Asset Retirement Obligation	377	349
Depletion, depreciation and amortization	112,871	51,123
Stock-based compensation expense	4,599	1,803
Gain from equity investments	-113,257	-111,113
Interest income - note receivable	-25	'
Unrealized loss (gain) on derivative instruments	6,433	-5,354
Deferred income tax expense	55,550	53,709
Amortization of loan commitment fees	637	505
Amortization of note discount and premium	158	145
Changes in operating assets and liabilities:	'	'
Increase in accounts receivable	-48,631	-5,183
Decrease (increase) in accounts receivable—related party	2,490	-1,975
Increase in prepaid expenses	-994	-1,133
Increase in accounts payable and accrued liabilities	53,988	3,089
Settlement of asset retirement obligation	-3,097	-807
Net cash provided by operating activities	201,509	73,545
Cash flows from investing activities:	'	'
Deductions to cash held in escrow	8	8
Additions to other property and equipment	-1,759	-355
Additions to oil and gas properties	-672,967	-428,234
Proceeds from sale of investments	89,120	65,111
Contributions to equity method investments	-39,162	-21,960
Distributions from equity method investments	0	901
Net cash used in investing activities	-624,760	-384,529
Cash flows from financing activities:	'	'
Principal payments on borrowings	-85	-73
Borrowings on line of credit	40,000	0
Debt issuance costs and loan commitment fees	-975	-686
Proceeds from issuance of common stock, net of offering costs and exercise of stock options	648	359,040
Net cash provided by financing activities	39,588	358,281
Net (decrease) increase in cash and cash equivalents	-383,663	47,297
Cash and cash equivalents at beginning of period	458,956	167,088
Cash and cash equivalents at end of period	75,293	214,385
Supplemental disclosure of cash flow information:	'	'
Interest payments	11,738	12,594
Income tax payments	16,700	750
Supplemental disclosure of non-cash transactions:	'	'
Capitalized stock based compensation	3,066	1,201
Asset retirement obligation capitalized	3,613	1,194
Interest capitalized	6,245	5,497
Foreign currency translation loss on investment in Grizzly Oil Sands ULC	($462)	($9,680)

Acquisitions

Acquisitions	6 Months Ended
	Jun. 30, 2014
Business Combinations [Abstract]	'
Acquisitions	'
	ACQUISITIONS
	On February 15, 2013, the Company completed an acquisition of approximately 22,000 net acres in the Utica Shale in Eastern Ohio. The purchase price was approximately $220.0 million, subject to certain adjustments. At closing, approximately $33.6 million of the purchase price was placed in escrow pending completion of title review after the closing. Gulfport funded this acquisition with a portion of the net proceeds from its common stock offering that closed on February 15, 2013. The Company received aggregate net proceeds of approximately $325.8 million from this equity offering. All of the acreage included in these transactions was nonproducing at the time of the applicable transaction and the Company is the operator of all of this acreage, subject to existing development and operating agreements between the parties. These acquisitions excluded the seller's interest in 14 existing wells and 16 proposed future wells together with certain acreage surrounding these wells.
	In February 2014, the Company agreed to acquire additional oil and natural gas properties consisting of approximately 8,000 net acres from Rhino Exploration LLC ("Rhino"), as well as its interest in all of the producing wells, in the Utica Shale of Eastern Ohio from Rhino, for a gross purchase price of approximately $184.0 million (the "Rhino Acquisition"), of which the Company closed on approximately $179.0 million ($177.4 million net of purchase price adjustments) on March 20, 2014. The remainder of the acquisition remains pending. The Company recognized $3.1 million of net revenues and $0.4 million of lease operating expenses as a result of the Rhino Acquisition from the closing date of March 20, 2014 through June 30, 2014, which is included in the accompanying consolidated statements of operations.
	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 amounts of the assets acquired as of March 20, 2014. 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	$	177,444
	Fair value of identifiable assets acquired
	Oil and natural gas properties
	Proved	$	32,005
	Unproved	6,263
	Unevaluated	139,176
	Fair value of net identifiable assets acquired	$	177,444

Property_And_Equipment

Property And Equipment	6 Months Ended
	Jun. 30, 2014
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, 2014 and December 31, 2013 are as follows:
		June 30, 2014			December 31, 2013
		(In thousands)
	Oil and natural gas properties	$	3,201,529		$	2,477,178
	Office furniture and fixtures	7,317			6,093
	Building	4,876			4,626
	Land	412			412
	Total property and equipment	3,214,134			2,488,309
	Accumulated depletion, depreciation, amortization and impairment	(897,553		)	(784,717		)
	Property and equipment, net	$	2,316,581		$	1,703,592
	Included in oil and natural gas properties at June 30, 2014 is the cumulative capitalization of $60.7 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 $6.9 million and $13.2 million for the three and six months ended June 30, 2014, respectively, and $3.2 million and $6.1 million for the three and six months ended June 30, 2013, respectively.
	The following table summarizes the Company’s non-producing properties excluded from amortization by area at June 30, 2014:
		June 30, 2014
		(In thousands)
	Colorado	$	5,933
	Bakken	295
	Southern Louisiana	636
	Ohio	1,180,728
	Other	45
		$	1,187,637
	At December 31, 2013, approximately $950.6 million 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.
	A reconciliation of the Company's asset retirement obligation for the six months ended June 30, 2014 and 2013 is as follows:
		June 30, 2014			June 30, 2013
		(In thousands)
	Asset retirement obligation, beginning of period	$	15,083		$	13,275
	Liabilities incurred	3,613			1,194
	Liabilities settled	(3,097		)	(807		)
	Accretion expense	377			349
	Asset retirement obligation as of end of period	15,976			14,011
	Less current portion	795			780
	Asset retirement obligation, long-term	$	15,181		$	13,231
	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. As of June 30, 2014, Gulfport owned 2,379,500 shares representing approximately 4.7% of Diamondback's outstanding common stock. Following the Contribution, the Company has accounted for its interest in Diamondback as an equity investment. See Note 3, "Equity Investments - Diamondback Energy, Inc."

Equity_Investments

Equity Investments	6 Months Ended
	Jun. 30, 2014
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, 2014 and December 31, 2013:
				Carrying Value							(Income) loss from equity method investments
		Approximate Ownership %		June 30, 2014				December 31, 2013			Three months ended June 30,						Six months ended June 30,
											2014			2013			2014			2013
				(In thousands)
	Investment in Tatex Thailand II, LLC	23.5	%	$	—			$	—		$	—		$	(205	)	$	—		$	(205	)
	Investment in Tatex Thailand III, LLC	17.9	%	12,238				10,774			121			75			170			93
	Investment in Grizzly Oil Sands ULC	24.9999	%	203,351				191,473			2,228			731			4,229			1,263
	Investment in Bison Drilling and Field Services LLC	40	%	25,777				12,318			(329		)	171			1,604			23
	Investment in Muskie Proppant LLC	25	%	8,111				7,544			(101		)	375			433			816
	Investment in Timber Wolf Terminals LLC	50	%	1,001				1,001			—			—			—			8
	Investment in Windsor Midstream LLC	22.5	%	13,230				10,632			(35		)	(474		)	(203		)	(858		)
	Investment in Stingray Pressure Pumping LLC	50	%	17,769				19,624			1,630			319			2,143			(384		)
	Investment in Stingray Cementing LLC	50	%	2,842				3,291			106			47			201			69
	Investment in Blackhawk Midstream LLC	50	%	—				—			—			83			(84,787		)	122
	Investment in Stingray Logistics LLC	50	%	1,060				903			(238		)	28			(157		)	54
	Investment in Diamondback Energy, Inc.	4.7	%	211,300				178,708			(72,945		)	(51,361		)	(121,712		)	(112,457		)
	Investment in Stingray Energy Services LLC	50	%	4,757				3,800			(6		)	103			35			138
				$	501,436			$	440,068		$	(69,569	)	$	(50,108	)	$	(198,044	)	$	(111,318	)
	The tables below summarize financial information for the Company's equity investments as of June 30, 2014 and December 31, 2013.
	Summarized balance sheet information:
		June 30, 2014			December 31, 2013
		(In thousands)
	Current assets	$	222,766		$	146,075
	Noncurrent assets	$	3,136,770		$	2,567,225
	Current liabilities	$	310,689		$	233,726
	Noncurrent liabilities	$	741,267		$	664,848
	Summarized results of operations:
		Three months ended June 30,							Six months ended June 30,
		2014			2013				2014			2013
		(In thousands)
	Gross revenue	$	220,013		$	81,496			$	378,294		$	138,434
	Net income (loss)	$	26,099		$	(5,119	)		$	207,604		$	15,508
	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 owns a concession covering approximately 245,000 acres in Southeast Asia. During the six months ended June 30, 2014, the Company paid $1.6 million in cash calls related to Tatex III.
	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, 2014, Grizzly had approximately 830,000 acres under lease in the Athabasca and Peace River oil sands regions of Alberta, Canada. During the six months ended June 30, 2014, Gulfport paid $16.6 million in cash calls. Grizzly’s functional currency is the Canadian dollar. The Company's investment in Grizzly was increased by $6.8 million for the three months ended June 30, 2014 as a result of a foreign currency translation gain and decreased by $0.5 million for the six months ended June 30, 2014 as a result of a foreign currency translation loss. The Company's investment in Grizzly was decreased by $6.1 million and $9.7 million as a result of a foreign currency translation loss for the three and six months ended June 30, 2013, 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. During the six months ended June 30, 2014, Gulfport paid $15.1 million in cash calls to Bison.
	Muskie Proppant LLC
	During 2011, the Company invested in Muskie Proppant LLC (“Muskie”), formerly known as Muskie Holdings LLC. 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. During the six months ended June 30, 2014, Gulfport paid $1.0 million in cash calls to Muskie.
	The Company entered into a loan agreement with Muskie effective July 1, 2013, under which it loaned Muskie $0.9 million. Interest accrues at the prime rate plus 2.5% and the loan had a maturity date of July 31, 2014. Subsequent to June 30, 2014, an amendment was made to the loan agreement which changed the maturity date of the loan to July, 31 2015. At June 30, 2014, the outstanding balance on the loan is included in notes receivable-related party on the accompanying consolidated balance sheets.
	Timber Wolf Terminals LLC
	During 2012, the Company invested in Timber Wolf Terminals LLC (“Timber Wolf”). The Company's initial investment during 2012 was $1.0 million. Timber Wolf will operate a crude/condensate terminal and a sand transloading facility in Ohio. During the six months ended June 30, 2014, 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 owns a 28.4% interest in Coronado Midstream LLC, a gas processing plant in West Texas, formerly known as MidMar Gas LLC. During the six months ended June 30, 2014, Gulfport paid $2.4 million in cash calls to Midstream.
	Stingray Pressure Pumping LLC
	During 2012, the Company invested in Stingray Pressure Pumping LLC ("Stingray Pressure"). Stingray Pressure provides well completion services. During the six months ended June 30, 2014, the Company paid $2.5 million in cash calls related to Stingray Pressure. The income from equity method investments presented in the table above reflects any intercompany profit eliminations.
	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, 2014, the Company did not pay any cash calls related to Stingray Cementing. The income 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, which is included in income from equity method investments in the accompanying consolidated statements of operations.
	Stingray Logistics LLC
	During 2012, the Company invested in Stingray Logistics LLC ("Stingray Logistics"). Stingray Logistics provides well services. During the six months ended June 30, 2014, the Company did not pay any cash calls.
	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 June 2014, the Company sold 1,000,000 shares of its Diamondback common stock and received net proceeds of approximately $89.1 million. In June and November of 2013, the Company sold 2,234,536 and 2,300,000 shares of its Diamondback common stock, respectively, and received aggregate net proceeds of approximately $192.7 million. As of June 30, 2014, the Company owned 2,379,500 shares representing approximately 4.7% of Diamondback's outstanding common stock.
	The Company accounts for its interest in Diamondback as an equity method investment and has elected the fair value option of accounting for this investment. Although the Company's ownership in Diamondback was below 20% at June 30, 2014, and it no longer has the right to designate a director nominee to serve on Diamondback's Board, the Company's initial nominee still serves as a member of Diamondback's Board. As the Company continues to have influence through this board seat, the Company continues to account for its investment in Diamondback as an equity method investment. The Company valued its investment in Diamondback using the quoted closing market price of Diamondback's stock on June 30, 2014 of $88.80 per share multiplied by the number of outstanding shares of Diamondback's stock held by the Company. 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, and $51.4 million and $112.5 million on its investment in Diamondback for three and six months ended June 30, 2013, respectively, which is included in 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") at a cost of $2.9 million. 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, 2014, the Company did not pay any cash calls to Stingray Energy. The income from equity method investments presented in the table above reflects any intercompany profit eliminations.

Other_Assets

Other Assets	6 Months Ended
	Jun. 30, 2014
Other Assets, Noncurrent Disclosure [Abstract]	'
Other Assets	'
	OTHER ASSETS
	Other assets consist of the following as of June 30, 2014 and December 31, 2013:
		June 30, 2014		December 31, 2013
		(In thousands)
	Plugging and abandonment escrow account on the WCBB properties (Note 8)	$	3,097	$	3,105
	Certificates of Deposit securing letter of credit	275		275
	Prepaid drilling costs	510		526
	Loan commitment fees	9,513		9,341
	Derivative receivable	4,493		4,493
	Deposits	34		34
	Other	63		77
		$	17,985	$	17,851

LongTerm_Debt

Long-Term Debt	6 Months Ended
	Jun. 30, 2014
Long-term Debt, Unclassified [Abstract]	'
Long-Term Debt	'
	LONG-TERM DEBT
	Long-term debt consisted of the following items as of June 30, 2014 and December 31, 2013:
		June 30, 2014			December 31, 2013
		(In thousands)
	Revolving credit agreement (1)	$	40,000		$	—
	Building loans (2)	1,910			1,995
	7.75% senior unsecured notes due 2020 (3)	300,000			300,000
	Unamortized original issue (discount) premium, net (4)	(2,649		)	(2,808		)
	Less: current maturities of long term debt	(163		)	(159		)
	Debt reflected as long term	$	339,098		$	299,028
	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. The Company capitalized approximately $2.9 million and $5.5 million in interest expense to oil and natural gas properties during the three and six months ended June 30, 2013, 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. As of June 30, 2014, the Company had $40.0 million of borrowings outstanding under the Amended and Restated Credit Agreement. At June 30, 2014, the total availability for future borrowings under the Amended and Restated Credit Agreement, after giving effect to an aggregate of $36.7 million of letters of credit, was $198.3 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 Reuters Screen LIBOR01 Page for deposits in U.S. dollars, or, if such rate is not available, the offered rate on such other page or service that displays the average British Bankers Association Interest Settlement 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. At June 30, 2014, amounts borrowed under the revolving credit facility bore interest at the eurodollar rate of 1.66%.
	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 funded debt to EBITDAX (net income, excluding any non-cash revenue or expense associated with swap contracts resulting from ASC 815, plus without duplication and 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) non-cash losses from minority investments, (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, and less non-cash income attributable to equity income from minority investments) for a twelve-month period may not be greater than 2.00 to 1.00; 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, 2014.
	(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 October Notes Offering and the December Notes Offering are collectively referred to as the "Notes Offerings". 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 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.
	Under the senior note indenture, interest on the 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 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 Notes; provided, however, that the 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 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 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 Notes with the net proceeds of certain equity offerings, provided that at least 65% of the aggregate principal amount of the 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 premium and discount are being amortized using the effective interest method.

StockBased_Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2014
Share-based Compensation [Abstract]	'
Stock-Based Compensation	'
	STOCK-BASED COMPENSATION
	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. During the three and six months ended June 30, 2013, the Company's stock-based compensation cost was $1.5 million and $3.0 million, respectively, of which the Company capitalized $0.6 million and $1.2 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, 2014 and 2013.
	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, 2014 is presented below:
		Shares		Weighted			Weighted		Aggregate
				Average			Average		Intrinsic
				Exercise Price			Remaining		Value (In thousands)
				per Share			Contractual Term
	Options outstanding at December 31, 2013	210,241		$	3.5		1.07		$	12,538
	Granted	—		—
	Exercised	(192,908	)	3.36					12,310
	Forfeited/expired	—		—
	Options outstanding at June 30, 2014	17,333		$	5.01		0.74		$	1,002
	Options exercisable at June 30, 2014	17,333		$	5.01		0.74		$	1,002
	The following table summarizes information about the stock options outstanding at June 30, 2014:
	Exercise			Number		Weighted Average		Number
	Price			Outstanding		Remaining Life		Exercisable
						(in years)
	$	3.36		12,333		0.56		12,333
	$	9.07		5,000		1.19		5,000
				17,333				17,333
	The following table summarizes restricted stock activity for the six months ended June 30, 2014:
		Number of		Weighted
		Unvested		Average
		Restricted Shares		Grant Date
				Fair Value
	Unvested shares as of December 31, 2013	463,637		$	44.8
	Granted	198,293		67.75
	Vested	(124,526	)	46.07
	Forfeited	(30,469	)	63.08
	Unvested shares as of June 30, 2014	506,935		$	53.36
	Unrecognized compensation expense as of June 30, 2014 related to outstanding stock options and restricted shares was $23.2 million. The expense is expected to be recognized over a weighted average period of 1.66 years.

Earnings_Per_Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2014
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,
		2014					2013
		Income		Shares	Per		Income		Shares	Per
					Share					Share
		(In thousands, except share data)
	Basic:
	Net income	$	47,852	85,448,678	$	0.56	$	43,828	77,428,605	$	0.57
	Effect of dilutive securities:
	Stock options and awards	—		357,218			—		478,182
	Diluted:
	Net income	$	47,852	85,805,896	$	0.56	$	43,828	77,906,787	$	0.56
		Six months ended June 30,
		2014					2013
		Income		Shares	Per Share		Income		Shares	Per Share
		(In thousands, except share data)
	Basic:
	Net income	$	130,410	85,354,566	$	1.53	$	88,387	75,142,113	$	1.18
	Effect of dilutive securities
	Stock options and awards	—		412,113			—		457,495
	Diluted:
	Net income	$	130,410	85,766,679	$	1.52	$	88,387	75,599,608	$	1.17
	There were no potential shares of common stock that were considered anti-dilutive for the three and six months ended June 30, 2014 and 2013.

Commitments

Commitments	6 Months Ended
	Jun. 30, 2014
Commitments [Abstract]	'
Commitments	'
	COMMITMENTS
	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, 2014, the plugging and abandonment trust totaled approximately $3.1 million. At June 30, 2014, the Company had plugged 378 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 each of its three executive officers, 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. Gulfport's former Chairman, Mr. Liddell, resigned effective June 2013 at which date his employment agreement with Gulfport terminated. At that same date, the Company entered into a consulting agreement with Mr. Liddell. The minimum commitment under Mr. Liddell's consulting agreement at June 30, 2014 was approximately $0.7 million and the minimum commitment under Mr. Palm's separation agreement at June 30, 2014 was approximately $0.6 million.
	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. The aggregate minimum commitment for future salary at June 30, 2014 under the April 22, 2014 amended and restated employment agreement was approximately $1.1 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, 2014 are as follows:
		(In thousands)
	Remaining 2014	$	268
	2015	494
	2016	426
	2017	398
	2018	—
	Total	$	1,586
	Litigation
	Gulfport has previously provided disclosure regarding three separate lawsuits filed by the Louisiana Department of Revenue (“LDR”) disputing Gulfport’s severance tax payments to the State of Louisiana from the sale of oil under fixed price contracts during the years 2005 through 2010. In June 2014, Gulfport and LDR entered into a settlement agreement under which Gulfport paid $6.0 million, which is included in litigation settlement in the accompanying consolidated statements of operations, and LDR released all claims for severance taxes for tax years 2005 to 2010 and dismissed all three lawsuits with prejudice.
	Gulfport has previously provided disclosure regarding a lawsuit filed entitled Reeds et al. v. BP American Production Company et al., in the 38th Judicial District Court of Louisiana, Case No. 10-18714, filed against 15 oil and gas defendants on July 30, 2010 by six individuals and one limited liability company in Cameron Parish Louisiana for surface contamination in areas where Gulfport and other defendants operated. In 2014, Gulfport and the plaintiffs have had settlement discussions focused on Gulfport's payment of approximately $18.0 million plus the cost of a plan of remediation to be approved by the Court and the Louisiana Department of Natural Resources. The settlement has not yet been finalized and there can be no assurance that a settlement will be reached on these or any other terms. The Company has accrued the $18.0 million proposed settlement as of June 30, 2014, which is included in litigation settlement in the accompanying consolidated statements of operations. The case was set for trial in July 2014, but plaintiffs’ counsel filed a motion to continue the trial, which was granted, so the parties could work on settlement of the matter. There is no new trial date set at this time, and the lawsuit is not being actively litigated.
	Due to the current stage of the Reeds lawsuit and settlement discussions, the outcome is uncertain and management cannot determine the amount of loss that may result. An adverse decision in the matter could have a material adverse effect on the Company's financial condition or results of operations.
	The Company has been named as a defendant in various other lawsuits related to its business. The resolution of these matters is not expected to have a material adverse effect on the Company's financial condition or results of operations in future periods.

Hedging_Activities

Hedging Activities	6 Months Ended
	Jun. 30, 2014
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. 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 accounts for its oil and natural gas derivative instruments as cash flow hedges for accounting purposes under FASB ASC 815 and related pronouncements. 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 2013 and 2014, the Company entered into fixed price swap and swaption contracts for 2013 through 2016 with four financial institutions. The Company’s fixed price swap contracts are tied to the commodity prices on the International Petroleum Exchange (“IPE”) 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 the IPE for Brent Crude for oil and on the NYMEX Henry Hub for natural gas. At June 30, 2014, the Company had the following fixed price swaps in place:
		Daily Volume		Weighted
		(Bbls/day)		Average Price
	July - December 2014	2,000		$	101.5
		Daily Volume (MMBtu/day)		Weighted
				Average Price
	July - December 2014	155,000		$	4.07
	January - December 2015	175,000		$	4.08
	January - March 2016	105,000		$	4.04
	Apr-16	95,000		$	4.04
	At June 30, 2014 the fair value of derivative assets and liabilities related to the fixed price swaps and swaptions was as follows:
		(In thousands)
	Long-term derivative instruments - asset	$	784
	Short-term derivative instruments - liability	$	24,532
	Long-term derivative instruments - liability	$	5,487
	All fixed price swaps and swaptions have been executed in connection with the Company’s oil and natural gas price hedging program. For fixed price 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 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 six months ending June 30, 2014, as all fixed price swaps and swaptions were deemed ineffective at their inception. Amounts reclassified out of accumulated other comprehensive income (loss) into earnings as a component of oil and condensate sales for the three and six months ended June 30, 2014 and 2013 are presented below.
		Three months ended June 30,						Six months ended June 30,
		2014			2013			2014		2013
		(In thousands)						(In thousands)
	Reduction to oil and condensate sales	$	—		$	(1,404	)	$	—	$	(3,201	)
	At June 30, 2014, no amounts related to fixed price swaps remain in accumulated other comprehensive income (loss).
	Hedge effectiveness is measured at least quarterly based on the relative changes in fair value between the derivative contract and the hedged item over time. Any change in fair value resulting from ineffectiveness is recognized immediately in earnings. The Company recognized a gain of $2.2 million and a loss of $6.4 million related to hedge ineffectiveness 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. The Company recognized a gain of $5.5 million and $5.4 million related to hedge ineffectiveness for the three and six months ended June 30, 2013, respectively, which is included in oil and condensate sales in the consolidated statements of operations.

Fair_Value_Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2014
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. 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, 2014:
		June 30, 2014
		Level 1		Level 2		Level 3
		(In thousands)
	Assets:
	Fixed price swaps	$	—	$	784	$	—
	Equity investment in Diamondback	211,300		—		—
	Liabilities:
	Fixed price swaps and swaptions	$	—	$	30,019	$	—
	The estimated fair value of the Company’s fixed price swap contracts and swaptions were based upon forward commodity prices based on quoted market prices, adjusted for differentials, and for the Company's swaptions, market implied volatilities of the underlying commodity were also evaluated. See Note 9 for further discussion of the Company's hedging activities. The estimated fair value of the Company's equity investment in Diamondback was based upon the public closing share price of Diamondback's common stock as of June 30, 2014.
	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, 2014 were approximately $3.6 million.

Fair_Value_Of_Financial_Instru

Fair Value Of Financial Instruments	6 Months Ended
	Jun. 30, 2014
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, 2014, the carrying value of the outstanding debt represented by the Notes was $297.4 million, including the remaining unamortized discount of approximately $3.0 million related to the October Notes and the remaining unamortized premium of approximately $0.4 million related to the December Notes. Based on the quoted market price, the fair value of the Notes was determined to be approximately $325.7 million at June 30, 2014.
	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_Financ

Condensed Consolidating Financial Information	6 Months Ended
	Jun. 30, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Condensed Consolidating Financial Information	'
	CONDENSED CONSOLIDATING FINANCIAL INFORMATION
	On October 17, 2012 and December 21, 2012, the Company issued an aggregate of $300.0 million of its 7.75% Senior Notes (the "Notes"). The 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 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.
	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, 2014
		Parent			Guarantors			Non-Guarantor			Eliminations			Consolidated
	Assets
	Current assets:
	Cash and cash equivalents	$	72,921		$	2,371		$	1		$	—		$	75,293
	Accounts receivable - oil and gas	102,136			5,319			—			—			107,455
	Accounts receivable - related parties	127			—			—			—			127
	Accounts receivable - intercompany	24,774			27			—			(24,801		)	—
	Prepaid expenses and other current assets	3,575			—			—			—			3,575
	Deferred tax asset	7,661			—			—			—			7,661
	Note receivable - related party	875			—			—			—			875
	Total current assets	212,069			7,717			1			(24,801		)	194,986
	Property and equipment:
	Oil and natural gas properties, full-cost accounting	3,191,073			11,029			—			(573		)	3,201,529
	Other property and equipment	12,575			30			—			—			12,605
	Accumulated depletion, depreciation, amortization and impairment	(897,530		)	(23		)	—			—			(897,553		)
	Property and equipment, net	2,306,118			11,036			—			(573		)	2,316,581
	Other assets:
	Equity investments and investments in subsidiaries	494,342			—			203,351			(196,257		)	501,436
	Derivative instruments	784			—			—			—			784
	Other assets	17,985			—			—			—			17,985
	Total other assets	513,111			—			203,351			(196,257		)	520,205
	Total assets	$	3,031,298		$	18,753		$	203,352		$	(221,631	)	$	3,031,772
	Liabilities and Stockholders' Equity
	Current liabilities:
	Accounts payable and accrued liabilities	$	286,984		$	474		$	—		$	—		$	287,458
	Accounts payable - intercompany	—			24,696			105			(24,801		)	—
	Asset retirement obligation - current	795			—			—			—			795
	Short-term derivative instruments	24,532			—			—			—			24,532
	Current maturities of long-term debt	163			—			—			—			163
	Total current liabilities	312,474			25,170			105			(24,801		)	312,948
	Long-term derivative instrument	5,487			—			—			—			5,487
	Asset retirement obligation - long-term	15,181			—			—			—			15,181
	Deferred tax liability	170,559			—			—			—			170,559
	Long-term debt, net of current maturities	339,098			—			—			—			339,098
	Total liabilities	842,799			25,170			105			(24,801		)	843,273
	Stockholders' equity:
	Common stock	854			—			—			—			854
	Paid-in capital	1,821,368			322			224,849			(225,171		)	1,821,368
	Accumulated other comprehensive income (loss)	(10,243		)	—			(10,243		)	10,243			(10,243		)
	Retained earnings (accumulated deficit)	376,520			(6,739		)	(11,359		)	18,098			376,520
	Total stockholders' equity	2,188,499			(6,417		)	203,247			(196,830		)	2,188,499
	Total liabilities and stockholders' equity	$	3,031,298		$	18,753		$	203,352		$	(221,631	)	$	3,031,772
	CONDENSED CONSOLIDATING BALANCE SHEETS
	(Amounts in thousands)
		December 31, 2013
		Parent			Guarantors			Non-Guarantor			Eliminations			Consolidated
	Assets
	Current assets:
	Cash and cash equivalents	$	451,431		$	7,525		$	—		$	—		$	458,956
	Accounts receivable - oil and gas	58,662			162			—			—			58,824
	Accounts receivable - related parties	2,617			—			—			—			2,617
	Accounts receivable - intercompany	21,379			27			—			(21,406		)	—
	Prepaid expenses and other current assets	2,581			—			—			—			2,581
	Deferred tax asset	6,927			—			—			—			6,927
	Short-term derivative instruments	324			—			—			—			324
	Note receivable - related party	875			—			—			—			875
	Total current assets	544,796			7,714			—			(21,406		)	531,104
Property and equipment:
Oil and natural gas properties, full-cost accounting,	2,470,411			7,340			—			(573		)	2,477,178
Other property and equipment	11,102			29			—			—			11,131
Accumulated depletion, depreciation, amortization and impairment	(784,695		)	(22		)	—			—			(784,717		)
Property and equipment, net	1,696,818			7,347			—			(573		)	1,703,592
Other assets:
Equity investments and investments in subsidiaries	432,727			—			191,473			(184,132		)	440,068
Derivative instruments	521			—			—			—			521
Other assets	17,851			—			—			—			17,851
Total other assets	451,099			—			191,473			(184,132		)	458,440
Total assets	$	2,692,713		$	15,061		$	191,473		$	(206,111	)	$	2,693,136
Liabilities and Stockholders' Equity
Current liabilities:
Accounts payable and accrued liabilities	$	190,284		$	423		$	—		$	—		$	190,707
Accounts payable - intercompany	—			21,296			110			(21,406		)	—
Asset retirement obligation - current	795			—			—			—			795
Short-term derivative instruments	12,280			—			—			—			12,280
Current maturities of long-term debt	159			—			—			—			159
Total current liabilities	203,518			21,719			110			(21,406		)	203,941
Long-term derivative instrument	11,366			—			—			—			11,366
Asset retirement obligation - long-term	14,288			—			—			—			14,288
Deferred tax liability	114,275			—			—			—			114,275
Long-term debt, net of current maturities	299,028			—			—			—			299,028
Total liabilities	642,475			21,719			110			(21,406		)	642,898
Stockholders' equity:
Common stock	851			—			—			—			851
Paid-in capital	1,813,058			322			208,277			(208,599		)	1,813,058
Accumulated other comprehensive income (loss)	(9,781		)	—			(9,781		)	9,781			(9,781		)
Retained earnings (accumulated deficit)	246,110			(6,980		)	(7,133		)	14,113			246,110
Total stockholders' equity	2,050,238			(6,658		)	191,363			(184,705		)	2,050,238
Total liabilities and stockholders' equity	$	2,692,713		$	15,061		$	191,473		$	(206,111	)	$	2,693,136
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 processing and marketing	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 OPERATIONS
(Amounts in thousands)
	Six months ended June 30, 2013
	Parent			Guarantors			Non-Guarantor			Eliminations			Consolidated
Total revenues	$	124,695		$	739		$	—		$	—		$	125,434
Costs and expenses:
Lease operating expenses	10,712			338			—			—			11,050
Production taxes	13,267			43			—			—			13,310
Midstream processing and marketing	2,310			8			—			—			2,318
Depreciation, depletion, and amortization	51,122			1			—			—			51,123
General and administrative	9,237			72			3			—			9,312
Accretion expense	349			—			—			—			349
Loss on sale of assets	572			—			—			—			572
	87,569			462			3			—			88,034
INCOME (LOSS) FROM OPERATIONS	37,126			277			(3		)	—			37,400
OTHER (INCOME) EXPENSE:
Interest expense	6,763			—			—			—			6,763
Interest income	(141		)	—			—			—			(141		)
(Income) loss from equity method investments and investments in subsidiaries	(111,592		)	—			1,262			(988		)	(111,318		)
	(104,970		)	—			1,262			(988		)	(104,696		)
INCOME (LOSS) BEFORE INCOME TAXES	142,096			277			(1,265		)	988			142,096
INCOME TAX EXPENSE	53,709			—			—			—			53,709
NET INCOME (LOSS)	$	88,387		$	277		$	(1,265	)	$	988		$	88,387
	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 income (loss)	(462		)	—			(462		)	462			(462		)
Comprehensive income (loss)	$	129,948		$	241		$	(4,688	)	$	4,447		$	129,948
	Six months ended June 30, 2013
	Parent			Guarantors			Non-Guarantor			Eliminations			Consolidated
Net income (loss)	$	88,387		$	277		$	(1,265	)	$	988		$	88,387
Foreign currency translation adjustment	(9,680		)	—			(9,680		)	9,680			(9,680		)
Change in fair value of derivative instruments, net of taxes	(1,074		)	—			—			—			(1,074		)
Reclassification of settled contracts, net of taxes	3,201			—			—			—			3,201
Other comprehensive income (loss)	(7,553		)	—			(9,680		)	9,680			(7,553		)
Comprehensive income (loss)	$	80,834		$	277		$	(10,945	)	$	10,668		$	80,834
CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS
(Amounts in thousands)
	Six months ended June 30, 2014
	Parent			Guarantors			Non-Guarantor			Eliminations			Consolidated
Net cash provided by 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 iecrease 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
	Six months ended June 30, 2013
	Parent			Guarantors			Non-Guarantor			Eliminations			Consolidated
Net cash provided by (used in) operating activities	$	73,633		$	(88	)	$	—		$	—		$	73,545
Net cash provided by (used in) investing activities	(383,817		)	(712		)	(15,055		)	15,055			(384,529		)
Net cash provided by (used in) financing activities	358,281			—			15,055			(15,055		)	358,281
Net increase (decrease) in cash and cash equivalents	48,097			(800		)	—			—			47,297
Cash and cash equivalents at beginning of period	165,293			1,795			—			—			167,088
Cash and cash equivalents at end of period	$	213,390		$	995		$	—		$	—		$	214,385

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	6 Months Ended
	Jun. 30, 2014
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. The Company is in the process of evaluating the impact on its consolidated financial statements.

Recent_Accounting_Pronouncemen1

Recent Accounting Pronouncements (Policies)	6 Months Ended
	Jun. 30, 2014
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. The Company is in the process of evaluating the impact on its consolidated financial statements.

Acquisitions_Tables

Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2014
Business Combinations [Abstract]	'
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 amounts of the assets acquired as of March 20, 2014. 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	$	177,444
	Fair value of identifiable assets acquired
	Oil and natural gas properties
	Proved	$	32,005
	Unproved	6,263
	Unevaluated	139,176
	Fair value of net identifiable assets acquired	$	177,444

Property_And_Equipment_Tables

Property And Equipment (Tables)	6 Months Ended
	Jun. 30, 2014
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, 2014 and December 31, 2013 are as follows:
		June 30, 2014			December 31, 2013
		(In thousands)
	Oil and natural gas properties	$	3,201,529		$	2,477,178
	Office furniture and fixtures	7,317			6,093
	Building	4,876			4,626
	Land	412			412
	Total property and equipment	3,214,134			2,488,309
	Accumulated depletion, depreciation, amortization and impairment	(897,553		)	(784,717		)
	Property and equipment, net	$	2,316,581		$	1,703,592
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, 2014:
		June 30, 2014
		(In thousands)
	Colorado	$	5,933
	Bakken	295
	Southern Louisiana	636
	Ohio	1,180,728
	Other	45
		$	1,187,637
Schedule Of Asset Retirement Obligation	'
	A reconciliation of the Company's asset retirement obligation for the six months ended June 30, 2014 and 2013 is as follows:
		June 30, 2014			June 30, 2013
		(In thousands)
	Asset retirement obligation, beginning of period	$	15,083		$	13,275
	Liabilities incurred	3,613			1,194
	Liabilities settled	(3,097		)	(807		)
	Accretion expense	377			349
	Asset retirement obligation as of end of period	15,976			14,011
	Less current portion	795			780
	Asset retirement obligation, long-term	$	15,181		$	13,231

Equity_Investments_Tables

Equity Investments (Tables)	6 Months Ended
	Jun. 30, 2014
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, 2014 and December 31, 2013:
				Carrying Value							(Income) loss from equity method investments
		Approximate Ownership %		June 30, 2014				December 31, 2013			Three months ended June 30,						Six months ended June 30,
											2014			2013			2014			2013
				(In thousands)
	Investment in Tatex Thailand II, LLC	23.5	%	$	—			$	—		$	—		$	(205	)	$	—		$	(205	)
	Investment in Tatex Thailand III, LLC	17.9	%	12,238				10,774			121			75			170			93
	Investment in Grizzly Oil Sands ULC	24.9999	%	203,351				191,473			2,228			731			4,229			1,263
	Investment in Bison Drilling and Field Services LLC	40	%	25,777				12,318			(329		)	171			1,604			23
	Investment in Muskie Proppant LLC	25	%	8,111				7,544			(101		)	375			433			816
	Investment in Timber Wolf Terminals LLC	50	%	1,001				1,001			—			—			—			8
	Investment in Windsor Midstream LLC	22.5	%	13,230				10,632			(35		)	(474		)	(203		)	(858		)
	Investment in Stingray Pressure Pumping LLC	50	%	17,769				19,624			1,630			319			2,143			(384		)
	Investment in Stingray Cementing LLC	50	%	2,842				3,291			106			47			201			69
	Investment in Blackhawk Midstream LLC	50	%	—				—			—			83			(84,787		)	122
	Investment in Stingray Logistics LLC	50	%	1,060				903			(238		)	28			(157		)	54
	Investment in Diamondback Energy, Inc.	4.7	%	211,300				178,708			(72,945		)	(51,361		)	(121,712		)	(112,457		)
	Investment in Stingray Energy Services LLC	50	%	4,757				3,800			(6		)	103			35			138
				$	501,436			$	440,068		$	(69,569	)	$	(50,108	)	$	(198,044	)	$	(111,318	)
Equity Method Investment Balance Sheet Summary	'
	Summarized balance sheet information:
		June 30, 2014			December 31, 2013
		(In thousands)
	Current assets	$	222,766		$	146,075
	Noncurrent assets	$	3,136,770		$	2,567,225
	Current liabilities	$	310,689		$	233,726
	Noncurrent liabilities	$	741,267		$	664,848
Equity Method Investment Income Statement Summary	'
	Summarized results of operations:
		Three months ended June 30,							Six months ended June 30,
		2014			2013				2014			2013
		(In thousands)
	Gross revenue	$	220,013		$	81,496			$	378,294		$	138,434
	Net income (loss)	$	26,099		$	(5,119	)		$	207,604		$	15,508

Other_Assets_Tables

Other Assets (Tables)	6 Months Ended
	Jun. 30, 2014
Other Assets, Noncurrent Disclosure [Abstract]	'
Schedule Of Other Assets	'
	Other assets consist of the following as of June 30, 2014 and December 31, 2013:
		June 30, 2014		December 31, 2013
		(In thousands)
	Plugging and abandonment escrow account on the WCBB properties (Note 8)	$	3,097	$	3,105
	Certificates of Deposit securing letter of credit	275		275
	Prepaid drilling costs	510		526
	Loan commitment fees	9,513		9,341
	Derivative receivable	4,493		4,493
	Deposits	34		34
	Other	63		77
		$	17,985	$	17,851

LongTerm_Debt_Tables

Long-Term Debt (Tables)	6 Months Ended
	Jun. 30, 2014
Long-term Debt, Unclassified [Abstract]	'
Break-Down of Long-Term Debt	'
	Long-term debt consisted of the following items as of June 30, 2014 and December 31, 2013:
		June 30, 2014			December 31, 2013
		(In thousands)
	Revolving credit agreement (1)	$	40,000		$	—
	Building loans (2)	1,910			1,995
	7.75% senior unsecured notes due 2020 (3)	300,000			300,000
	Unamortized original issue (discount) premium, net (4)	(2,649		)	(2,808		)
	Less: current maturities of long term debt	(163		)	(159		)
	Debt reflected as long term	$	339,098		$	299,028

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2014
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, 2014 is presented below:
		Shares		Weighted			Weighted		Aggregate
				Average			Average		Intrinsic
				Exercise Price			Remaining		Value (In thousands)
				per Share			Contractual Term
	Options outstanding at December 31, 2013	210,241		$	3.5		1.07		$	12,538
	Granted	—		—
	Exercised	(192,908	)	3.36					12,310
	Forfeited/expired	—		—
	Options outstanding at June 30, 2014	17,333		$	5.01		0.74		$	1,002
	Options exercisable at June 30, 2014	17,333		$	5.01		0.74		$	1,002
Summary Of Stock Option Plans By Exercise Price	'
	The following table summarizes information about the stock options outstanding at June 30, 2014:
	Exercise			Number		Weighted Average		Number
	Price			Outstanding		Remaining Life		Exercisable
						(in years)
	$	3.36		12,333		0.56		12,333
	$	9.07		5,000		1.19		5,000
				17,333				17,333
Summary Of Restricted Stock Award And Unit Activity	'
	The following table summarizes restricted stock activity for the six months ended June 30, 2014:
		Number of		Weighted
		Unvested		Average
		Restricted Shares		Grant Date
				Fair Value
	Unvested shares as of December 31, 2013	463,637		$	44.8
	Granted	198,293		67.75
	Vested	(124,526	)	46.07
	Forfeited	(30,469	)	63.08
	Unvested shares as of June 30, 2014	506,935		$	53.36

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2014
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,
		2014					2013
		Income		Shares	Per		Income		Shares	Per
					Share					Share
		(In thousands, except share data)
	Basic:
	Net income	$	47,852	85,448,678	$	0.56	$	43,828	77,428,605	$	0.57
	Effect of dilutive securities:
	Stock options and awards	—		357,218			—		478,182
	Diluted:
	Net income	$	47,852	85,805,896	$	0.56	$	43,828	77,906,787	$	0.56

Commitments_Tables

Commitments (Tables)	6 Months Ended
	Jun. 30, 2014
Commitments [Abstract]	'
Schedule of Future Minimum Lease Commitments	'
	Future minimum lease commitments under these leases at June 30, 2014 are as follows:
		(In thousands)
	Remaining 2014	$	268
	2015	494
	2016	426
	2017	398
	2018	—
	Total	$	1,586

Hedging_Activities_Tables

Hedging Activities (Tables)	6 Months Ended
	Jun. 30, 2014
General Discussion of Derivative Instruments and Hedging Activities [Abstract]	'
Schedule Of Derivative Instruments	'
	At June 30, 2014, the Company had the following fixed price swaps in place:
		Daily Volume		Weighted
		(Bbls/day)		Average Price
	July - December 2014	2,000		$	101.5
		Daily Volume (MMBtu/day)		Weighted
				Average Price
	July - December 2014	155,000		$	4.07
	January - December 2015	175,000		$	4.08
	January - March 2016	105,000		$	4.04
	Apr-16	95,000		$	4.04
Schedule Of Derivative Instruments In Statement Of Financial Position	'
	At June 30, 2014 the fair value of derivative assets and liabilities related to the fixed price swaps and swaptions was as follows:
		(In thousands)
	Long-term derivative instruments - asset	$	784
	Short-term derivative instruments - liability	$	24,532
	Long-term derivative instruments - liability	$	5,487
Schedule Of Cash Flow Hedges	'
	Amounts reclassified out of accumulated other comprehensive income (loss) into earnings as a component of oil and condensate sales for the three and six months ended June 30, 2014 and 2013 are presented below.
		Three months ended June 30,						Six months ended June 30,
		2014			2013			2014		2013
		(In thousands)						(In thousands)
	Reduction to oil and condensate sales	$	—		$	(1,404	)	$	—	$	(3,201	)

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2014
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, 2014:
		June 30, 2014
		Level 1		Level 2		Level 3
		(In thousands)
	Assets:
	Fixed price swaps	$	—	$	784	$	—
	Equity investment in Diamondback	211,300		—		—
	Liabilities:
	Fixed price swaps and swaptions	$	—	$	30,019	$	—

Condensed_Consolidating_Financ1

Condensed Consolidating Financial Information (Tables)	6 Months Ended
	Jun. 30, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Condensed Consolidating Balance Sheets	'
	CONDENSED CONSOLIDATING BALANCE SHEETS
	(Amounts in thousands)
		June 30, 2014
		Parent			Guarantors			Non-Guarantor			Eliminations			Consolidated
	Assets
	Current assets:
	Cash and cash equivalents	$	72,921		$	2,371		$	1		$	—		$	75,293
	Accounts receivable - oil and gas	102,136			5,319			—			—			107,455
	Accounts receivable - related parties	127			—			—			—			127
	Accounts receivable - intercompany	24,774			27			—			(24,801		)	—
	Prepaid expenses and other current assets	3,575			—			—			—			3,575
	Deferred tax asset	7,661			—			—			—			7,661
	Note receivable - related party	875			—			—			—			875
	Total current assets	212,069			7,717			1			(24,801		)	194,986
	Property and equipment:
	Oil and natural gas properties, full-cost accounting	3,191,073			11,029			—			(573		)	3,201,529
	Other property and equipment	12,575			30			—			—			12,605
	Accumulated depletion, depreciation, amortization and impairment	(897,530		)	(23		)	—			—			(897,553		)
	Property and equipment, net	2,306,118			11,036			—			(573		)	2,316,581
	Other assets:
	Equity investments and investments in subsidiaries	494,342			—			203,351			(196,257		)	501,436
	Derivative instruments	784			—			—			—			784
	Other assets	17,985			—			—			—			17,985
	Total other assets	513,111			—			203,351			(196,257		)	520,205
	Total assets	$	3,031,298		$	18,753		$	203,352		$	(221,631	)	$	3,031,772
	Liabilities and Stockholders' Equity
	Current liabilities:
	Accounts payable and accrued liabilities	$	286,984		$	474		$	—		$	—		$	287,458
	Accounts payable - intercompany	—			24,696			105			(24,801		)	—
	Asset retirement obligation - current	795			—			—			—			795
	Short-term derivative instruments	24,532			—			—			—			24,532
	Current maturities of long-term debt	163			—			—			—			163
	Total current liabilities	312,474			25,170			105			(24,801		)	312,948
	Long-term derivative instrument	5,487			—			—			—			5,487
	Asset retirement obligation - long-term	15,181			—			—			—			15,181
	Deferred tax liability	170,559			—			—			—			170,559
	Long-term debt, net of current maturities	339,098			—			—			—			339,098
	Total liabilities	842,799			25,170			105			(24,801		)	843,273
	Stockholders' equity:
	Common stock	854			—			—			—			854
	Paid-in capital	1,821,368			322			224,849			(225,171		)	1,821,368
	Accumulated other comprehensive income (loss)	(10,243		)	—			(10,243		)	10,243			(10,243		)
	Retained earnings (accumulated deficit)	376,520			(6,739		)	(11,359		)	18,098			376,520
	Total stockholders' equity	2,188,499			(6,417		)	203,247			(196,830		)	2,188,499
	Total liabilities and stockholders' equity	$	3,031,298		$	18,753		$	203,352		$	(221,631	)	$	3,031,772
	CONDENSED CONSOLIDATING BALANCE SHEETS
	(Amounts in thousands)
		December 31, 2013
		Parent			Guarantors			Non-Guarantor			Eliminations			Consolidated
	Assets
	Current assets:
	Cash and cash equivalents	$	451,431		$	7,525		$	—		$	—		$	458,956
	Accounts receivable - oil and gas	58,662			162			—			—			58,824
	Accounts receivable - related parties	2,617			—			—			—			2,617
	Accounts receivable - intercompany	21,379			27			—			(21,406		)	—
	Prepaid expenses and other current assets	2,581			—			—			—			2,581
	Deferred tax asset	6,927			—			—			—			6,927
	Short-term derivative instruments	324			—			—			—			324
	Note receivable - related party	875			—			—			—			875
	Total current assets	544,796			7,714			—			(21,406		)	531,104
	Property and equipment:
	Oil and natural gas properties, full-cost accounting,	2,470,411			7,340			—			(573		)	2,477,178
	Other property and equipment	11,102			29			—			—			11,131
Accumulated depletion, depreciation, amortization and impairment	(784,695		)	(22		)	—			—			(784,717		)
Property and equipment, net	1,696,818			7,347			—			(573		)	1,703,592
Other assets:
Equity investments and investments in subsidiaries	432,727			—			191,473			(184,132		)	440,068
Derivative instruments	521			—			—			—			521
Other assets	17,851			—			—			—			17,851
Total other assets	451,099			—			191,473			(184,132		)	458,440
Total assets	$	2,692,713		$	15,061		$	191,473		$	(206,111	)	$	2,693,136
Liabilities and Stockholders' Equity
Current liabilities:
Accounts payable and accrued liabilities	$	190,284		$	423		$	—		$	—		$	190,707
Accounts payable - intercompany	—			21,296			110			(21,406		)	—
Asset retirement obligation - current	795			—			—			—			795
Short-term derivative instruments	12,280			—			—			—			12,280
Current maturities of long-term debt	159			—			—			—			159
Total current liabilities	203,518			21,719			110			(21,406		)	203,941
Long-term derivative instrument	11,366			—			—			—			11,366
Asset retirement obligation - long-term	14,288			—			—			—			14,288
Deferred tax liability	114,275			—			—			—			114,275
Long-term debt, net of current maturities	299,028			—			—			—			299,028
Total liabilities	642,475			21,719			110			(21,406		)	642,898
Stockholders' equity:
Common stock	851			—			—			—			851
Paid-in capital	1,813,058			322			208,277			(208,599		)	1,813,058
Accumulated other comprehensive income (loss)	(9,781		)	—			(9,781		)	9,781			(9,781		)
Retained earnings (accumulated deficit)	246,110			(6,980		)	(7,133		)	14,113			246,110
Total stockholders' equity	2,050,238			(6,658		)	191,363			(184,705		)	2,050,238
Total liabilities and stockholders' equity	$	2,692,713		$	15,061		$	191,473		$	(206,111	)	$	2,693,136
Condensed Consolidating Statements of Operations	'
	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 processing and marketing	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 OPERATIONS
	(Amounts in thousands)
		Six months ended June 30, 2013
		Parent			Guarantors			Non-Guarantor			Eliminations			Consolidated
	Total revenues	$	124,695		$	739		$	—		$	—		$	125,434
	Costs and expenses:
	Lease operating expenses	10,712			338			—			—			11,050
	Production taxes	13,267			43			—			—			13,310
	Midstream processing and marketing	2,310			8			—			—			2,318
	Depreciation, depletion, and amortization	51,122			1			—			—			51,123
	General and administrative	9,237			72			3			—			9,312
	Accretion expense	349			—			—			—			349
	Loss on sale of assets	572			—			—			—			572
		87,569			462			3			—			88,034
	INCOME (LOSS) FROM OPERATIONS	37,126			277			(3		)	—			37,400
	OTHER (INCOME) EXPENSE:
	Interest expense	6,763			—			—			—			6,763
	Interest income	(141		)	—			—			—			(141		)
	(Income) loss from equity method investments and investments in subsidiaries	(111,592		)	—			1,262			(988		)	(111,318		)
		(104,970		)	—			1,262			(988		)	(104,696		)
	INCOME (LOSS) BEFORE INCOME TAXES	142,096			277			(1,265		)	988			142,096
	INCOME TAX EXPENSE	53,709			—			—			—			53,709
	NET INCOME (LOSS)	$	88,387		$	277		$	(1,265	)	$	988		$	88,387
Condensed Consolidating Statements of Comprehensive Income (Loss)	'
		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 income (loss)	(462		)	—			(462		)	462			(462		)
	Comprehensive income (loss)	$	129,948		$	241		$	(4,688	)	$	4,447		$	129,948
		Six months ended June 30, 2013
		Parent			Guarantors			Non-Guarantor			Eliminations			Consolidated
	Net income (loss)	$	88,387		$	277		$	(1,265	)	$	988		$	88,387
	Foreign currency translation adjustment	(9,680		)	—			(9,680		)	9,680			(9,680		)
	Change in fair value of derivative instruments, net of taxes	(1,074		)	—			—			—			(1,074		)
	Reclassification of settled contracts, net of taxes	3,201			—			—			—			3,201
	Other comprehensive income (loss)	(7,553		)	—			(9,680		)	9,680			(7,553		)
	Comprehensive income (loss)	$	80,834		$	277		$	(10,945	)	$	10,668		$	80,834
Condensed Consolidating Statements of Cash Flows	'
		Six months ended June 30, 2014
		Parent			Guarantors			Non-Guarantor			Eliminations			Consolidated
	Net cash provided by 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 iecrease 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
		Six months ended June 30, 2013
		Parent			Guarantors			Non-Guarantor			Eliminations			Consolidated
	Net cash provided by (used in) operating activities	$	73,633		$	(88	)	$	—		$	—		$	73,545
	Net cash provided by (used in) investing activities	(383,817		)	(712		)	(15,055		)	15,055			(384,529		)
	Net cash provided by (used in) financing activities	358,281			—			15,055			(15,055		)	358,281
	Net increase (decrease) in cash and cash equivalents	48,097			(800		)	—			—			47,297
	Cash and cash equivalents at beginning of period	165,293			1,795			—			—			167,088
	Cash and cash equivalents at end of period	$	213,390		$	995		$	—		$	—		$	214,385

Acquisitions_Details

Acquisitions (Details) (USD $)	3 Months Ended		6 Months Ended		0 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Mar. 20, 2014	Feb. 15, 2013	Mar. 20, 2014	Mar. 20, 2014	Mar. 20, 2014	Mar. 20, 2014
					Utica Shale [Member]	Utica Shale [Member]	Utica Shale [Member]	Utica Shale [Member]	Utica Shale [Member]	Utica Shale [Member]
						well	acre	Proved Properties [Member]	Unproved Properties [Member]	Unevaluated Properties [Member]
						acre
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'	'	'
Gas and oil acreage, undeveloped, net	'	'	'	'	'	22,000	8,000	'	'	'
Cash price of ownership interest	'	'	'	'	$184,000,000	$220,000,000	'	'	'	'
Amount put in escrow	'	'	'	'	'	33,600,000	'	'	'	'
Proceeds from issuance of common stock, net of offering costs and exercise of stock options	'	'	648,000	359,040,000	'	325,800,000	'	'	'	'
Existing wells excluded	'	'	'	'	'	14	'	'	'	'
Future wells excluded	'	'	'	'	'	16	'	'	'	'
Purchase price	'	'	'	'	179,000,000	'	'	'	'	'
Cash, net of purchase price adjustments	'	'	'	'	177,444,000	'	'	'	'	'
Fair value of oil and natural gas properties	'	'	'	'	'	'	177,444,000	32,005,000	6,263,000	139,176,000
Net revenues	114,736,000	70,434,000	232,765,000	125,434,000	3,100,000	'	'	'	'	'
Lease operating expenses	$12,680,000	$5,878,000	$24,309,000	$11,050,000	$400,000	'	'	'	'	'

Property_And_Equipment_Schedul

Property And Equipment (Schedule Of Property And Equipment) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Abstract]	'	'
Oil and natural gas properties, full-cost accounting	$3,201,529	$2,477,178
Office furniture and fixtures	7,317	6,093
Building	4,876	4,626
Land	412	412
Total property and equipment	3,214,134	2,488,309
Accumulated depletion, depreciation, amortization and impairment	-897,553	-784,717
Property and equipment, net	$2,316,581	$1,703,592

Property_And_Equipment_Narrati

Property And Equipment (Narrative) (Details) (USD $)

3 Months Ended

6 Months Ended

1 Months Ended

6 Months Ended

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Jun. 30, 2014

Oct. 31, 2012

Oct. 11, 2012

7-May-12

Jan. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Oct. 11, 2012

Diamondback [Member]

Diamondback [Member]

Diamondback [Member]

Diamondback [Member]

Diamondback [Member]

Minimum [Member]

Maximum [Member]

Diamondback Energy, Inc [Member]

Diamondback Energy, Inc [Member]

Accounts Receivable - Related Party [Member]

Property, Plant and Equipment [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cumulative capitalization of general and administrative costs incurred and capitalized to the full cost pool

$60,700,000

'

$60,700,000

'

'

'

'

'

'

'

'

'

'

'

Capitalized general and administrative costs

6,900,000

3,200,000

13,200,000

6,100,000

'

'

'

'

'

'

'

'

'

'

Capitalized costs of oil and natural gas properties excluded from amortization

1,187,637,000

'

1,187,637,000

'

950,590,000

'

'

'

'

'

'

'

'

'

Expected number of years amortization will commence

'

'

'

'

'

'

'

'

'

'

'3 years

'5 years

'

'

Investment (shares)

'

'

'

'

'

2,379,500

'

7,914,036

'

'

'

'

2,379,500

7,914,036

Promissory note receivable

'

'

'

'

'

'

'

63,600,000

'

'

'

'

'

'

Payment received from Diamondback

'

'

$48,631,000

$5,183,000

'

'

'

'

'

$18,600,000

'

'

'

'

Ownership interest

'

'

'

'

'

'

21.40%

'

35.00%

'

'

'

4.70%

'

Property_And_Equipment_Summary

Property And Equipment (Summary Of Oil And Gas Properties Not Subject To Amortization) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items]	'	'
Total oil and gas properties not subject to amortization, total	$1,187,637	$950,590
Colorado [Member]	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items]	'	'
Total oil and gas properties not subject to amortization, total	5,933	'
Bakken [Member]	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items]	'	'
Total oil and gas properties not subject to amortization, total	295	'
Southern Louisiana [Member]	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items]	'	'
Total oil and gas properties not subject to amortization, total	636	'
Ohio [Member]	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items]	'	'
Total oil and gas properties not subject to amortization, total	1,180,728	'
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_Schedul1

Property And Equipment (Schedule Of Asset Retirement Obligation) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'	'	'	'	'
Asset retirement obligation, beginning of period	'	'	$15,083	$13,275	'
Liabilities incurred	'	'	3,613	1,194	'
Liabilities settled	'	'	-3,097	-807	'
Accretion expense	189	174	377	349	'
Asset retirement obligation as of end of period	15,976	14,011	15,976	14,011	'
Less current portion	795	780	795	780	795
Asset retirement obligation, long-term	$15,181	$13,231	$15,181	$13,231	$14,288

Equity_Investments_Investments

Equity Investments (Investments Accounted For By The Equity Method) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Oct. 11, 2012
Schedule of Equity Method Investments [Line Items]	'	'	'	'	'	'
Equity investments	$501,436	'	$501,436	'	$440,068	'
Loss (income) from equity method investments	-69,569	-50,108	-198,044	-111,318	'	'
Tatex Thailand II, LLC [Member]	'	'	'	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'	'	'	'
Approximate Ownership percentage	23.50%	'	23.50%	'	'	'
Equity investments	'	'	'	'	'	'
Loss (income) from equity method investments	0	-205	0	-205	'	'
Tatex Thailand III, LLC [Member]	'	'	'	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'	'	'	'
Approximate Ownership percentage	17.90%	'	17.90%	'	'	'
Equity investments	12,238	'	12,238	'	10,774	'
Loss (income) from equity method investments	121	75	170	93	'	'
Grizzly Oil Sands ULC [Member]	'	'	'	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'	'	'	'
Approximate Ownership percentage	25.00%	'	25.00%	'	'	'
Equity investments	203,351	'	203,351	'	191,473	'
Loss (income) from equity method investments	2,228	731	4,229	1,263	'	'
Bison Drilling And Field Services LLC [Member]	'	'	'	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'	'	'	'
Approximate Ownership percentage	40.00%	'	40.00%	'	'	'
Equity investments	25,777	'	25,777	'	12,318	'
Loss (income) from equity method investments	-329	171	1,604	23	'	'
Muskie Holdings LLC [Member]	'	'	'	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'	'	'	'
Approximate Ownership percentage	25.00%	'	25.00%	'	'	'
Equity investments	8,111	'	8,111	'	7,544	'
Loss (income) from equity method investments	-101	375	433	816	'	'
Timber Wolf Terminals LLC [Member]	'	'	'	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'	'	'	'
Approximate Ownership percentage	50.00%	'	50.00%	'	'	'
Equity investments	1,001	'	1,001	'	1,001	'
Loss (income) from equity method investments	0	0	0	8	'	'
Windsor Midstream LLC [Member]	'	'	'	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'	'	'	'
Approximate Ownership percentage	22.50%	'	22.50%	'	'	'
Equity investments	13,230	'	13,230	'	10,632	'
Loss (income) from equity method investments	-35	-474	-203	-858	'	'
Stingray Pressure Pumping LLC [Member]	'	'	'	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'	'	'	'
Approximate Ownership percentage	50.00%	'	50.00%	'	'	'
Equity investments	17,769	'	17,769	'	19,624	'
Loss (income) from equity method investments	1,630	319	2,143	-384	'	'
Stingray Cementing LLC [Member]	'	'	'	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'	'	'	'
Approximate Ownership percentage	50.00%	'	50.00%	'	'	'
Equity investments	2,842	'	2,842	'	3,291	'
Loss (income) from equity method investments	106	47	201	69	'	'
Blackhawk Midstream LLC [Member]	'	'	'	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'	'	'	'
Approximate Ownership percentage	50.00%	'	50.00%	'	'	'
Equity investments	0	'	0	'	0	'
Loss (income) from equity method investments	0	83	-84,787	122	'	'
Stingray Logistics LLC [Member]	'	'	'	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'	'	'	'
Approximate Ownership percentage	50.00%	'	50.00%	'	'	'
Equity investments	1,060	'	1,060	'	903	'
Loss (income) from equity method investments	-238	28	-157	54	'	'
Diamondback Energy, Inc [Member]	'	'	'	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'	'	'	'
Approximate Ownership percentage	4.70%	'	4.70%	'	'	'
Equity investments	211,300	'	211,300	'	178,708	138,500
Loss (income) from equity method investments	-72,945	-51,361	-121,712	-112,457	'	'
Stingray Energy Services LLC [Member]	'	'	'	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'	'	'	'
Approximate Ownership percentage	50.00%	'	50.00%	'	'	'
Equity investments	4,757	'	4,757	'	3,800	'
Loss (income) from equity method investments	($6)	$103	$35	$138	'	'

Equity_Investments_Equity_Inve

Equity Investments (Equity Investments Balance Sheet Disclosure) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Equity Method Investments and Joint Ventures [Abstract]	'	'
Current assets	$222,766	$146,075
Noncurrent assets	3,136,770	2,567,225
Current liabilities	310,689	233,726
Noncurrent liabilities	$741,267	$664,848

Equity_Investments_Equity_Inve1

Equity Investments (Equity Investment Income Statement Disclosure) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Equity Method Investments and Joint Ventures [Abstract]	'	'	'	'
Gross revenue	$220,013	$81,496	$378,294	$138,434
Net income (loss)	$26,099	($5,119)	$207,604	$15,508

Equity_Investments_Narrative_D

Equity Investments (Narrative) (Details) (USD $)

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

12 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

0 Months Ended

3 Months Ended

6 Months Ended

1 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

12 Months Ended

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Jul. 01, 2013

Jul. 01, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2012

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Jan. 28, 2014

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Jun. 30, 2014

Nov. 30, 2013

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Nov. 30, 2013

Jun. 30, 2013

Dec. 31, 2013

Oct. 11, 2012

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

acre

Tatex Thailand II, LLC [Member]

Tatex Thailand II, LLC [Member]

Tatex Thailand II, LLC [Member]

Tatex Thailand II, LLC [Member]

Tatex Thailand II, LLC [Member]

Apico Llc [Member]

Tatex Thailand III, LLC [Member]

Tatex Thailand III, LLC [Member]

Tatex Thailand III, LLC [Member]

Tatex Thailand III, LLC [Member]

Tatex Thailand III, LLC [Member]

Grizzly Oil Sands ULC [Member]

Grizzly Oil Sands ULC [Member]

Grizzly Oil Sands ULC [Member]

Grizzly Oil Sands ULC [Member]

Grizzly Oil Sands ULC [Member]

Bison Drilling And Field Services LLC [Member]

Bison Drilling And Field Services LLC [Member]

Bison Drilling And Field Services LLC [Member]

Bison Drilling And Field Services LLC [Member]

Bison Drilling And Field Services LLC [Member]

Muskie Holdings LLC [Member]

Muskie Holdings LLC [Member]

Muskie Holdings LLC [Member]

Muskie Holdings LLC [Member]

Muskie Holdings LLC [Member]

Muskie Holdings LLC [Member]

Muskie Holdings LLC [Member]

Timber Wolf Terminals LLC [Member]

Timber Wolf Terminals LLC [Member]

Timber Wolf Terminals LLC [Member]

Timber Wolf Terminals LLC [Member]

Timber Wolf Terminals LLC [Member]

Timber Wolf Terminals LLC [Member]

Windsor Midstream LLC [Member]

Windsor Midstream LLC [Member]

Windsor Midstream LLC [Member]

Windsor Midstream LLC [Member]

Windsor Midstream LLC [Member]

Windsor Midstream LLC [Member]

Stingray Pressure Pumping LLC [Member]

Stingray Pressure Pumping LLC [Member]

Stingray Pressure Pumping LLC [Member]

Stingray Pressure Pumping LLC [Member]

Stingray Pressure Pumping LLC [Member]

Stingray Cementing LLC [Member]

Stingray Cementing LLC [Member]

Stingray Cementing LLC [Member]

Stingray Cementing LLC [Member]

Stingray Cementing LLC [Member]

Blackhawk Midstream LLC [Member]

Blackhawk Midstream LLC [Member]

Blackhawk Midstream LLC [Member]

Blackhawk Midstream LLC [Member]

Blackhawk Midstream LLC [Member]

Blackhawk Midstream LLC [Member]

Stingray Logistics LLC [Member]

Stingray Logistics LLC [Member]

Stingray Logistics LLC [Member]

Stingray Logistics LLC [Member]

Stingray Logistics LLC [Member]

Diamondback Energy, Inc [Member]

Diamondback Energy, Inc [Member]

Diamondback Energy, Inc [Member]

Diamondback Energy, Inc [Member]

Diamondback Energy, Inc [Member]

Diamondback Energy, Inc [Member]

Diamondback Energy, Inc [Member]

Diamondback Energy, Inc [Member]

Diamondback Energy, Inc [Member]

Diamondback Energy, Inc [Member]

Stingray Energy Services LLC [Member]

Stingray Energy Services LLC [Member]

Stingray Energy Services LLC [Member]

Stingray Energy Services LLC [Member]

Stingray Energy Services LLC [Member]

acre

acre

Prime Rate [Member]

MidMar Gas LLC [Member]

Ohio Gathering Company, LLC and Ohio Condensate Company, LLC [Member]

Schedule of Equity Method Investments [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity shares owned by affiliate (shares)

'

'

'

'

'

'

'

'

'

'

85,122

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total shares owned of subaffiliate (shares)

'

'

'

'

'

'

'

'

'

'

1,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gas and oil area, reserve (acres)

'

'

243,000

'

'

'

'

'

'

'

'

'

'

245,000

'

'

'

'

830,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Distributions received

'

'

$0

$901,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$84,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

(Income) loss from equity method investments

69,569,000

50,108,000

198,044,000

111,318,000

'

0

205,000

0

205,000

'

'

-121,000

-75,000

-170,000

-93,000

'

-2,228,000

-731,000

-4,229,000

-1,263,000

'

329,000

-171,000

-1,604,000

-23,000

'

101,000

-375,000

-433,000

-816,000

'

'

'

0

0

0

-8,000

'

'

35,000

474,000

203,000

858,000

'

'

-1,630,000

-319,000

-2,143,000

384,000

'

-106,000

-47,000

-201,000

-69,000

'

0

-83,000

84,787,000

-122,000

'

'

238,000

-28,000

157,000

-54,000

'

'

'

'

72,945,000

51,361,000

121,712,000

'

112,457,000

'

'

6,000

-103,000

-35,000

-138,000

'

Cash calls paid

'

'

'

'

'

'

'

'

'

'

'

'

'

1,600,000

'

'

'

'

16,600,000

'

'

'

'

15,100,000

'

'

'

'

1,000,000

'

'

'

'

'

'

'

'

'

'

'

'

2,400,000

'

'

'

'

'

2,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Purchase price

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

190,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount put in escrow

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

14,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Ownership interest

'

'

'

'

'

23.50%

'

23.50%

'

'

'

17.90%

'

17.90%

'

'

25.00%

'

25.00%

'

'

40.00%

'

40.00%

'

'

25.00%

'

25.00%

'

'

'

'

50.00%

'

50.00%

'

'

'

22.50%

'

22.50%

'

'

28.40%

50.00%

'

50.00%

'

'

50.00%

'

50.00%

'

'

50.00%

'

50.00%

'

'

'

50.00%

'

50.00%

'

'

4.70%

'

'

4.70%

'

4.70%

'

'

'

'

50.00%

'

50.00%

'

'

Equity investments

501,436,000

'

501,436,000

'

440,068,000

'

'

'

'

'

'

12,238,000

'

12,238,000

'

10,774,000

203,351,000

'

203,351,000

'

191,473,000

25,777,000

'

25,777,000

'

12,318,000

8,111,000

'

8,111,000

'

7,544,000

'

'

1,001,000

'

1,001,000

'

'

1,001,000

13,230,000

'

13,230,000

'

10,632,000

'

17,769,000

'

17,769,000

'

19,624,000

2,842,000

'

2,842,000

'

3,291,000

0

'

0

'

0

'

1,060,000

'

1,060,000

'

903,000

211,300,000

'

'

211,300,000

'

211,300,000

'

'

178,708,000

138,500,000

4,757,000

'

4,757,000

'

3,800,000

Sale of Stock, Number of Shares Issued in Transaction

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,000,000

2,300,000

2,234,536

'

'

'

'

'

'

'

'

'

'

'

'

Sale of Stock, Consideration Received on Transaction

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

89,100,000

'

'

'

'

'

192,700,000

'

'

'

'

'

'

'

'

Increase (decrease) due to foreign currency translation adjustment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

6,800,000

-6,100,000

-500,000

-9,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loans receivable, basis spread on variable rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loan receivable

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Payments for equity method investments

'

'

$39,162,000

$21,960,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$1,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$2,900,000

Investment (shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,379,500

'

'

2,379,500

'

2,379,500

'

'

'

7,914,036

'

'

'

'

'

Share price (usd per share)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$88.80

'

'

$88.80

'

$88.80

'

'

'

'

'

'

'

'

'

Other_Assets_Schedule_Of_Other

Other Assets (Schedule Of Other Assets) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Other Assets, Noncurrent Disclosure [Abstract]	'	'
Plugging and abandonment escrow account on the WCBB properties	$3,097	$3,105
Certificates of Deposit securing letter of credit	275	275
Prepaid drilling costs	510	526
Loan commitment fees	9,513	9,341
Derivative receivable	4,493	4,493
Deposits	34	34
Other	63	77
Other assets	$17,985	$17,851

LongTerm_Debt_BreakDown_Of_Lon

Long-Term Debt (Break-Down Of Long-Term Debt) (Details) (USD $)

Jun. 30, 2014

Dec. 31, 2013

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Mar. 31, 2011

Jun. 30, 2014

Dec. 31, 2013

Dec. 21, 2012

Oct. 17, 2012

Line of Credit [Member]

Building loans [Member]

Building loans [Member]

Building loans [Member]

7.75% senior unsecured notes due 2020 [Member]

7.75% senior unsecured notes due 2020 [Member]

7.75% senior unsecured notes due 2020 [Member]

7.75% senior unsecured notes due 2020 [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

Long-tern debt

'

'

$0

[1]

$1,910,000

[2]

$1,995,000

[2]

$2,400,000

$300,000,000

[3]

$300,000,000

[3]

$300,000,000

$300,000,000

Unamortized original issue (discount) premium, net

-2,649,000

[4]

-2,808,000

[4]

'

'

'

'

'

'

'

'

Current maturities of long-term debt

-163,000

-159,000

'

'

'

'

'

'

'

'

Long-term debt, net of current maturities

$339,098,000

$299,028,000

'

'

'

'

'

'

'

'

[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. As of June 30, 2014, the Company had $40.0 million of borrowings outstanding under the Amended and Restated Credit Agreement. At June 30, 2014, the total availability for future borrowings under the Amended and Restated Credit Agreement, after giving effect to an aggregate of $36.7 million of letters of credit, was $198.3 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 Reuters Screen LIBOR01 Page for deposits in U.S. dollars, or, if such rate is not available, the offered rate on such other page or service that displays the average British Bankers Association Interest Settlement 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. At June 30, 2014, amounts borrowed under the revolving credit facility bore interest at the eurodollar rate of 1.66%.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 funded debt to EBITDAX (net income, excluding any non-cash revenue or expense associated with swap contracts resulting from ASC 815, plus without duplication and 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) non-cash losses from minority investments, (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, and less non-cash income attributable to equity income from minority investments) for a twelve-month period may not be greater than 2.00 to 1.00; 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, 2014.

[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 October Notes Offering and the December Notes Offering are collectively referred to as the "Notes Offerings". 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 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. Under the senior note indenture, interest on the 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 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 Notes; provided, however, that the 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 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 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 Notes with the net proceeds of certain equity offerings, provided that at least 65% of the aggregate principal amount of the 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 premium and discount are being amortized using the effective interest method.

LongTerm_Debt_Narrative_Detail

Long-Term Debt (Narrative) (Details) (USD $)

3 Months Ended

6 Months Ended

1 Months Ended

0 Months Ended

0 Months Ended

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Dec. 31, 2013

Dec. 21, 2012

Oct. 17, 2012

Mar. 31, 2011

Jun. 30, 2014

Dec. 31, 2013

Dec. 21, 2012

Dec. 21, 2012

Jun. 30, 2014

Apr. 23, 2014

Jun. 30, 2014

Apr. 23, 2014

Apr. 22, 2014

Dec. 27, 2013

Apr. 23, 2014

Apr. 23, 2014

Apr. 23, 2014

Apr. 23, 2014

Jun. 30, 2014

Apr. 23, 2014

Apr. 22, 2014

Jun. 30, 2014

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Building Loans [Member]

Building Loans [Member]

Building Loans [Member]

Minimum [Member]

Maximum [Member]

Letter of Credit [Member]

Nova Scotia, Amegy, KeyBank [Member]

Nova Scotia, Amegy, KeyBank [Member]

Nova Scotia, Amegy, KeyBank [Member]

Nova Scotia, Amegy, KeyBank [Member]

Nova Scotia, Amegy, KeyBank [Member]

Nova Scotia, Amegy, KeyBank [Member]

Nova Scotia, Amegy, KeyBank [Member]

Nova Scotia, Amegy, KeyBank [Member]

Nova Scotia, Amegy, KeyBank [Member]

Nova Scotia, Amegy, KeyBank [Member]

Nova Scotia, Amegy, KeyBank [Member]

Nova Scotia, Amegy, KeyBank [Member]

Nova Scotia, Amegy, KeyBank [Member]

Senior Notes [Member]

Senior Notes [Member]

Base Rate Loans [Member]

Base Rate Loans [Member]

Base Rate Loans [Member]

Euro Dollar Loans [Member]

Letter of Credit [Member]

Letter of Credit [Member]

Letter of Credit [Member]

Revolving Credit Facility [Member]

Federal Funds Rate [Member]

Eurodollar [Member]

Eurodollar [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest cost capitalized, undeveloped properties

$3,900,000

$2,900,000

$6,200,000

$5,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Revolving credit facility

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,500,000,000

'

'

'

'

'

'

'

'

Borrowing capacity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

275,000,000

150,000,000

'

'

'

'

'

'

70,000,000

20,000,000

'

Applicable rate, minimum

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.50%

'

'

1.50%

'

'

'

'

Applicable rate, maximum

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.50%

'

'

2.50%

'

'

'

'

Stated interest rate

'

'

'

'

'

'

7.75%

7.75%

5.82%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit facility outstanding

'

'

'

'

'

'

'

'

'

'

'

'

'

40,000,000

[1]

'

'

'

'

'

'

'

'

'

36,700,000

[1]

'

'

'

Remaining borrowing capacity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

198,300,000

'

'

'

'

'

'

'

'

'

'

'

Basis spread

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.50%

1.00%

'

'

'

'

'

Debt instrument, description of rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'LIBOR01

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Interest Rate at Period End

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.66%

Debt covenant ratio for reasonable transactions

2

'

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt covenant ratio for EBITDAX

3

'

3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Building Loan Outstanding Amount Of Building Loan Refinanced

'

'

'

'

300,000,000

[2]

300,000,000

[2]

300,000,000

300,000,000

2,400,000

1,910,000

[3]

1,995,000

[3]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loan, periodic payment

'

'

'

'

'

'

'

'

22,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt issued

'

'

'

'

'

'

50,000,000

250,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Redemption of principal amount plus aggregate net proceeds

'

'

'

'

'

'

100.00%

'

'

'

'

'

35.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of notes required to be outstanding for redemption

'

'

'

'

'

'

'

'

'

'

'

65.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Discount issue price, price

'

'

'

'

'

'

'

98.53%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Premium issue price, percent

'

'

'

'

'

'

101.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unamortized discount

3,000,000

'

3,000,000

'

'

'

'

3,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Effective interest rate

'

'

'

'

'

'

7.53%

8.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unamortized premium

$400,000

'

$400,000

'

'

'

$500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

[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. As of June 30, 2014, the Company had $40.0 million of borrowings outstanding under the Amended and Restated Credit Agreement. At June 30, 2014, the total availability for future borrowings under the Amended and Restated Credit Agreement, after giving effect to an aggregate of $36.7 million of letters of credit, was $198.3 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 Reuters Screen LIBOR01 Page for deposits in U.S. dollars, or, if such rate is not available, the offered rate on such other page or service that displays the average British Bankers Association Interest Settlement 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. At June 30, 2014, amounts borrowed under the revolving credit facility bore interest at the eurodollar rate of 1.66%.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 funded debt to EBITDAX (net income, excluding any non-cash revenue or expense associated with swap contracts resulting from ASC 815, plus without duplication and 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) non-cash losses from minority investments, (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, and less non-cash income attributable to equity income from minority investments) for a twelve-month period may not be greater than 2.00 to 1.00; 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, 2014.

[2]

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 October Notes Offering and the December Notes Offering are collectively referred to as the "Notes Offerings". 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 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. Under the senior note indenture, interest on the 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 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 Notes; provided, however, that the 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 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 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 Notes with the net proceeds of certain equity offerings, provided that at least 65% of the aggregate principal amount of the Notes initially issued remains outstanding immediately after such redemption.

[3]

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.

StockBased_Compensation_Narrat

Stock-Based Compensation (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Share-based Compensation [Abstract]	'	'	'	'
Stock issued	'	'	0	'
Stock-based compensation expense	$3,400,000	$1,500,000	$7,700,000	$3,000,000
Capitalized stock-based compensation	1,343,000	600,000	3,066,000	1,201,000
Unrecognized compensation expense	$23,200,000	'	$23,200,000	'
Weighted average period	'	'	'19 months 27 days	'

StockBased_Compensation_Summar

Stock-Based Compensation (Summary Of Stock Option Activity) (Details) (USD $)	6 Months Ended	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]	'	'
Options outstanding at beginning of period, Shares	210,241	'
Granted, Shares	0	'
Exercised, Shares	-192,908	'
Forfeited/expired, Shares	0	'
Options Outstanding end of period, Shares	17,333	210,241
Options exercisable at end of period, Shares	17,333	'
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)	$3.50	'
Granted, Weighted Average Exercise Price (usd per share)	$0	'
Exercised, Weighted Average Exercise Price per Share (usd per share)	$3.36	'
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)	$5.01	$3.50
Options exercisable at end of period, Weighted Average Exercise Price per Share (usd per share)	$5.01	'
Options outstanding, Weighted Average Remaining Contractual Term at beginning of period	'8 months 25 days	'1 year 26 days
Options outstanding, Weighted Average Remaining Contractual Term at end of period	'8 months 25 days	'1 year 26 days
Options exercisable at end of period, Weighted Average Remaining Contractual Term	'8 months 25 days	'
Options outstanding, Aggregate Intrinsic Value at beginning of period	$12,538	'
Exercised, Aggregate Intrinsic Value	12,310	'
Options outstanding, Aggregate Intrinsic Value at end of period	1,002	12,538
Options exercisable at end of period, Aggregate Intrinsic Value	$1,002	'

StockBased_Compensation_Summar1

Stock-Based Compensation (Summary Of Stock Option Plans By Exercise Price) (Details) (USD $)	6 Months Ended
	Jun. 30, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Number Outstanding (shares)	17,333
Number Exercisable (shares)	17,333
Exercise Price $3.36 [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Price (usd per share)	$3.36
Number Outstanding (shares)	12,333
Weighted Average Remaining Life (in years)	'6 months 23 days
Number Exercisable (shares)	12,333
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)	'14 months 8 days
Number Exercisable (shares)	5,000

StockBased_Compensation_Summar2

Stock-Based Compensation (Summary Of Restricted Stock Award And Unit Activity) (Details) (Restricted Stock [Member], USD $)	6 Months Ended
	Jun. 30, 2014
Restricted Stock [Member]	'
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)	463,637
Granted, Number of Unvested Restricted Shares (shares)	198,293
Vested, Number of Unvested Restricted Shares (shares)	-124,526
Forfeited, Number of Unvested Restricted Shares (shares)	-30,469
Number of Unvested Restricted Shares, end of period (shares)	506,935
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)	$44.80
Granted, Weighted Average Grant Date Fair Value (usd per share)	$67.75
Vested, Weighted Average Grant Date Fair Value (usd per share)	$46.07
Forfeited, Weighted Average Grant Date Fair Value (usd per share)	$63.08
Unvested Restricted stock, Weighted Average Grant Date Fair Value, end of period (usd per share)	$53.36

Earnings_Per_Share_Schedule_Of

Earnings Per Share (Schedule Of Earnings Per Share Reconciliation) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]	'	'	'	'
Basic, Net income	$47,852	$43,828	$130,410	$88,387
Effect of dilutive securities, Stock options and awards	0	0	0	0
Diluted, Net income	$47,852	$43,828	$130,410	$88,387
Weighted average common shares outstanding - Basic (shares)	85,448,678	77,428,605	85,354,566	75,142,113
Effect of dilutive securities, Stock options and awards (shares)	357,218	478,182	412,113	457,495
Weighted average common shares outstanding-Diluted (shares)	85,805,896	77,906,787	85,766,679	75,599,608
Basic net income from continuing operations per share (usd per share)	$0.56	$0.57	$1.53	$1.18
Diluted net income from continuing operations per share (usd per share)	$0.56	$0.56	$1.52	$1.17

Commitments_Details

Commitments (Details) (USD $)

0 Months Ended

0 Months Ended

1 Months Ended

0 Months Ended

0 Months Ended

Nov. 01, 2012

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Mar. 11, 1997

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2010

Jul. 30, 2010

Jun. 30, 2014

Jul. 30, 2010

Jul. 30, 2010

Chairman [Member]

Chief Executive Officer [Member]

Executive Officer [Member]

WCBB [Member]

WCBB [Member]

Louisiana Department of Revenue Tax Litigation [Member]

Louisiana Department of Revenue Tax Litigation [Member]

Reed Litigation [Member]

Reed Litigation [Member]

Individual Counterparty [Member]

Limited Liability Company [Member]

well

well

lawsuit

lawsuit

defendant

Reed Litigation [Member]

Reed Litigation [Member]

plaintiff

plaintiff

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

'

'

'

'

'

'

20

'

'

'

'

'

'

'

Tenure Of Minimum Wells To Be Plugged

'

'

'

'

'

'

'20 years

'

'

'

'

'

'

'

Plugging And Abandonment Escrow Account

'

3,097,000

3,105,000

'

'

'

'

'

'

'

'

'

'

'

Number Of Wells Plugged

'

'

'

'

'

'

'

378

'

'

'

'

'

'

Employment Agreement, Term

'3 years

'

'

'

'

'

'

'

'

'

'

'

'

'

Employment Agreement, Subsequent Extension

'1 year

'

'

'

'

'

'

'

'

'

'

'

'

'

Employment Agreement, Notice Period Allowed For Termination

'90 days

'

'

'

'

'

'

'

'

'

'

'

'

'

Other Commitment

'

'

'

700,000

600,000

1,100,000

'

'

'

'

'

'

'

'

Number of pending claims

'

'

'

'

'

'

'

'

'

3

'

'

'

'

Payment of litigation settlement

'

'

'

'

'

'

'

'

6,000,000

'

'

'

'

'

Number of claims dismissed

'

'

'

'

'

'

'

'

3

'

'

'

'

'

Number of plaintiffs

'

'

'

'

'

'

'

'

'

'

'

'

6

1

Number of defendants

'

'

'

'

'

'

'

'

'

'

15

'

'

'

Accrual for legal settlements

'

'

'

'

'

'

'

'

'

'

'

$18,000,000

'

'

Commitments_Future_Minimum_Lea

Commitments (Future Minimum Lease Commitments) (Details) (USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified
Commitments [Abstract]	'
Remaining 2014	$268
2015	494
2016	426
2017	398
2018	0
Total	$1,586

Hedging_Activities_Narrative_D

Hedging Activities (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
			financial_institution		financial_institution
General Discussion of Derivative Instruments and Hedging Activities [Abstract]	'	'	'	'	'
Number of financial institutions	'	'	4	'	4
Gain on fair value hedge ineffectiveness, net	$2.20	$5.50	($6.40)	$5.40	'

Hedging_Activities_Schedule_Of

Hedging Activities (Schedule Of Derivative Instruments) (Details)	Jun. 30, 2014
Fixed Price Swap, April through December 2014 [Member]	'
Derivative [Line Items]	'
Daily Volume	2,000
Weighted Average Price	101.5
Fixed Price Swap, June through December 2014 [Member]	'
Derivative [Line Items]	'
Daily Volume	155,000
Weighted Average Price	4.07
Fixed Price Swap, January through December 2015 [Member]	'
Derivative [Line Items]	'
Daily Volume	175,000
Weighted Average Price	4.08
Fixed Price Swap, January through March 2016 [Member]	'
Derivative [Line Items]	'
Daily Volume	105,000
Weighted Average Price	4.04
Fixed Price Swap, April 2016 [Member]	'
Derivative [Line Items]	'
Daily Volume	95,000
Weighted Average Price	4.04

Hedging_Activities_Schedule_Of1

Hedging Activities (Schedule Of Derivative Instruments In Statement Of Financial Position) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
General Discussion of Derivative Instruments and Hedging Activities [Abstract]	'	'
Long-term derivative instruments - asset	$784	$521
Short-term derivative instruments - liabilities	24,532	12,280
Long-term derivative instruments - liability	$5,487	$11,366

Hedging_Activities_Schedule_Of2

Hedging Activities (Schedule Of Cash Flow Hedges) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
General Discussion of Derivative Instruments and Hedging Activities [Abstract]	'	'	'	'
Reduction to oil and condensate sales	$0	$1,404	$0	$3,201

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Assets	'	'	$324
Asset retirement obligation capitalized	3,613	1,194	'
Level 1 [Member] | Diamondback Energy LLC [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Equity investment in Diamondback	211,300	'	'
Level 1 [Member] | Fixed Price Swaps [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Assets	0	'	'
Liabilities	0	'	'
Level 2 [Member] | Diamondback Energy LLC [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Equity investment in Diamondback	0	'	'
Level 2 [Member] | Fixed Price Swaps [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Assets	784	'	'
Liabilities	30,019	'	'
Level 3 [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Asset retirement obligation capitalized	3,600	'	'
Level 3 [Member] | Diamondback Energy LLC [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Equity investment in Diamondback	0	'	'
Level 3 [Member] | Fixed Price Swaps [Member]	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Assets	0	'	'
Liabilities	$0	'	'

Recovered_Sheet1

Fair Value of Financial Instruments (Details) (USD $)	Jun. 30, 2014	Dec. 21, 2012	Oct. 17, 2012
In Millions, unless otherwise specified
Debt Instrument [Line Items]	'	'	'
Unamortized discount	$3	'	'
Unamortized premium	0.4	'	'
Fair value of notes	325.7	'	'
Senior Notes [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Carrying value of debt	297.4	'	'
Unamortized discount	'	'	3.7
Unamortized premium	'	$0.50	'

Condensed_Consolidating_Financ2

Condensed Consolidating Financial Information - (Details) (Senior Notes [Member], USD $)	Jun. 30, 2014		Dec. 31, 2013		Dec. 21, 2012	Oct. 17, 2012
Senior Notes [Member]	'		'		'	'
Condensed Financial Statements, Captions [Line Items]	'		'		'	'
Long-tern debt	$300,000,000	[1]	$300,000,000	[1]	$300,000,000	$300,000,000
Stated interest rate	'		'		7.75%	7.75%
[1]	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 October Notes Offering and the December Notes Offering are collectively referred to as the "Notes Offerings". 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 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. Under the senior note indenture, interest on the 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 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 Notes; provided, however, that the 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 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 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 Notes with the net proceeds of certain equity offerings, provided that at least 65% of the aggregate principal amount of the Notes initially issued remains outstanding immediately after such redemption.

Condensed_Consolidating_Financ3

Condensed Consolidating Financial Information - Condensed Consolidating Balance Sheets (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Current assets:	'	'	'	'
Cash and cash equivalents	$75,293	$458,956	$214,385	$167,088
Accounts receivable—oil and gas	107,455	58,824	'	'
Accounts receivable-related parties	127	2,617	'	'
Accounts receivable - intercompany	'	0	'	'
Prepaid expenses and other current assets	3,575	2,581	'	'
Deferred tax asset	7,661	6,927	'	'
Short-term derivative instruments	'	324	'	'
Note receivable - related party	875	875	'	'
Total current assets	194,986	531,104	'	'
Property and equipment:	'	'	'	'
Oil and natural gas properties, full-cost accounting	3,201,529	2,477,178	'	'
Other property and equipment	12,605	11,131	'	'
Accumulated depletion, depreciation, amortization and impairment	-897,553	-784,717	'	'
Property and equipment, net	2,316,581	1,703,592	'	'
Other assets:	'	'	'	'
Equity investments	501,436	440,068	'	'
Derivative instruments	784	521	'	'
Other assets	17,985	17,851	'	'
Total other assets	520,205	458,440	'	'
Total assets	3,031,772	2,693,136	'	'
Current liabilities:	'	'	'	'
Accounts payable and accrued liabilities	287,458	190,707	'	'
Accounts payable - intercompany	0	0	'	'
Asset retirement obligation—current	795	795	780	'
Short-term derivative instruments	24,532	12,280	'	'
Current maturities of long-term debt	163	159	'	'
Total current liabilities	312,948	203,941	'	'
Long-term derivative instrument	5,487	11,366	'	'
Asset retirement obligation—long-term	15,181	14,288	13,231	'
Deferred tax liability	170,559	114,275	'	'
Long-term debt, net of current maturities	339,098	299,028	'	'
Total liabilities	843,273	642,898	'	'
Stockholders’ equity:	'	'	'	'
Common stock	854	851	'	'
Paid-in capital	1,821,368	1,813,058	'	'
Accumulated other comprehensive loss	-10,243	-9,781	'	'
Retained earnings (accumulated deficit)	376,520	246,110	'	'
Total stockholders’ equity	2,188,499	2,050,238	1,569,286	1,126,408
Total liabilities and stockholders’ equity	3,031,772	2,693,136	'	'
Parent Company [Member]	'	'	'	'
Current assets:	'	'	'	'
Cash and cash equivalents	72,921	451,431	213,390	165,293
Accounts receivable—oil and gas	102,136	58,662	'	'
Accounts receivable-related parties	127	2,617	'	'
Accounts receivable - intercompany	24,774	21,379	'	'
Prepaid expenses and other current assets	3,575	2,581	'	'
Deferred tax asset	7,661	6,927	'	'
Short-term derivative instruments	'	324	'	'
Note receivable - related party	875	875	'	'
Total current assets	212,069	544,796	'	'
Property and equipment:	'	'	'	'
Oil and natural gas properties, full-cost accounting	3,191,073	2,470,411	'	'
Other property and equipment	12,575	11,102	'	'
Accumulated depletion, depreciation, amortization and impairment	-897,530	-784,695	'	'
Property and equipment, net	2,306,118	1,696,818	'	'
Other assets:	'	'	'	'
Equity investments	494,342	432,727	'	'
Derivative instruments	784	521	'	'
Other assets	17,985	17,851	'	'
Total other assets	513,111	451,099	'	'
Total assets	3,031,298	2,692,713	'	'
Current liabilities:	'	'	'	'
Accounts payable and accrued liabilities	286,984	190,284	'	'
Accounts payable - intercompany	0	0	'	'
Asset retirement obligation—current	795	795	'	'
Short-term derivative instruments	24,532	12,280	'	'
Current maturities of long-term debt	163	159	'	'
Total current liabilities	312,474	203,518	'	'
Long-term derivative instrument	5,487	11,366	'	'
Asset retirement obligation—long-term	15,181	14,288	'	'
Deferred tax liability	170,559	114,275	'	'
Long-term debt, net of current maturities	339,098	299,028	'	'
Total liabilities	842,799	642,475	'	'
Stockholders’ equity:	'	'	'	'
Common stock	854	851	'	'
Paid-in capital	1,821,368	1,813,058	'	'
Accumulated other comprehensive loss	-10,243	-9,781	'	'
Retained earnings (accumulated deficit)	376,520	246,110	'	'
Total stockholders’ equity	2,188,499	2,050,238	'	'
Total liabilities and stockholders’ equity	3,031,298	2,692,713	'	'
Guarantor [Member]	'	'	'	'
Current assets:	'	'	'	'
Cash and cash equivalents	2,371	7,525	995	1,795
Accounts receivable—oil and gas	5,319	162	'	'
Accounts receivable-related parties	0	0	'	'
Accounts receivable - intercompany	27	27	'	'
Prepaid expenses and other current assets	'	0	'	'
Deferred tax asset	0	0	'	'
Short-term derivative instruments	'	0	'	'
Note receivable - related party	0	0	'	'
Total current assets	7,717	7,714	'	'
Property and equipment:	'	'	'	'
Oil and natural gas properties, full-cost accounting	11,029	7,340	'	'
Other property and equipment	30	29	'	'
Accumulated depletion, depreciation, amortization and impairment	-23	-22	'	'
Property and equipment, net	11,036	7,347	'	'
Other assets:	'	'	'	'
Equity investments	'	0	'	'
Derivative instruments	0	0	'	'
Other assets	'	0	'	'
Total other assets	'	'	'	'
Total assets	18,753	15,061	'	'
Current liabilities:	'	'	'	'
Accounts payable and accrued liabilities	474	423	'	'
Accounts payable - intercompany	24,696	21,296	'	'
Asset retirement obligation—current	'	0	'	'
Short-term derivative instruments	'	0	'	'
Current maturities of long-term debt	'	0	'	'
Total current liabilities	25,170	21,719	'	'
Long-term derivative instrument	0	0	'	'
Asset retirement obligation—long-term	0	0	'	'
Deferred tax liability	'	0	'	'
Long-term debt, net of current maturities	0	0	'	'
Total liabilities	25,170	21,719	'	'
Stockholders’ equity:	'	'	'	'
Common stock	'	0	'	'
Paid-in capital	322	322	'	'
Accumulated other comprehensive loss	'	0	'	'
Retained earnings (accumulated deficit)	-6,739	-6,980	'	'
Total stockholders’ equity	-6,417	-6,658	'	'
Total liabilities and stockholders’ equity	18,753	15,061	'	'
Non-Guarantor [Member]	'	'	'	'
Current assets:	'	'	'	'
Cash and cash equivalents	1	0	0	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	'	'
Deferred tax asset	0	0	'	'
Short-term derivative instruments	'	0	'	'
Note receivable - related party	0	0	'	'
Total current assets	1	'	'	'
Property and equipment:	'	'	'	'
Oil and natural gas properties, full-cost accounting	'	0	'	'
Other property and equipment	'	0	'	'
Accumulated depletion, depreciation, amortization and impairment	'	0	'	'
Property and equipment, net	'	0	'	'
Other assets:	'	'	'	'
Equity investments	203,351	191,473	'	'
Derivative instruments	0	0	'	'
Other assets	'	0	'	'
Total other assets	203,351	191,473	'	'
Total assets	203,352	191,473	'	'
Current liabilities:	'	'	'	'
Accounts payable and accrued liabilities	'	0	'	'
Accounts payable - intercompany	105	110	'	'
Asset retirement obligation—current	'	0	'	'
Short-term derivative instruments	'	0	'	'
Current maturities of long-term debt	'	0	'	'
Total current liabilities	105	110	'	'
Long-term derivative instrument	0	0	'	'
Asset retirement obligation—long-term	0	0	'	'
Deferred tax liability	'	0	'	'
Long-term debt, net of current maturities	0	0	'	'
Total liabilities	105	110	'	'
Stockholders’ equity:	'	'	'	'
Common stock	'	0	'	'
Paid-in capital	224,849	208,277	'	'
Accumulated other comprehensive loss	-10,243	-9,781	'	'
Retained earnings (accumulated deficit)	-11,359	-7,133	'	'
Total stockholders’ equity	203,247	191,363	'	'
Total liabilities and stockholders’ equity	203,352	191,473	'	'
Eliminations [Member]	'	'	'	'
Current assets:	'	'	'	'
Cash and cash equivalents	0	0	0	0
Accounts receivable—oil and gas	'	0	'	'
Accounts receivable-related parties	0	0	'	'
Accounts receivable - intercompany	-24,801	-21,406	'	'
Prepaid expenses and other current assets	'	0	'	'
Deferred tax asset	0	0	'	'
Short-term derivative instruments	'	0	'	'
Note receivable - related party	0	0	'	'
Total current assets	-24,801	-21,406	'	'
Property and equipment:	'	'	'	'
Oil and natural gas properties, full-cost accounting	-573	-573	'	'
Other property and equipment	'	0	'	'
Accumulated depletion, depreciation, amortization and impairment	'	0	'	'
Property and equipment, net	-573	-573	'	'
Other assets:	'	'	'	'
Equity investments	-196,257	-184,132	'	'
Derivative instruments	0	0	'	'
Other assets	'	0	'	'
Total other assets	-196,257	-184,132	'	'
Total assets	-221,631	-206,111	'	'
Current liabilities:	'	'	'	'
Accounts payable and accrued liabilities	'	0	'	'
Accounts payable - intercompany	-24,801	-21,406	'	'
Asset retirement obligation—current	'	0	'	'
Short-term derivative instruments	'	0	'	'
Current maturities of long-term debt	'	0	'	'
Total current liabilities	-24,801	-21,406	'	'
Long-term derivative instrument	0	0	'	'
Asset retirement obligation—long-term	0	0	'	'
Deferred tax liability	'	0	'	'
Long-term debt, net of current maturities	0	0	'	'
Total liabilities	-24,801	-21,406	'	'
Stockholders’ equity:	'	'	'	'
Common stock	'	0	'	'
Paid-in capital	-225,171	-208,599	'	'
Accumulated other comprehensive loss	10,243	9,781	'	'
Retained earnings (accumulated deficit)	18,098	14,113	'	'
Total stockholders’ equity	-196,830	-184,705	'	'
Total liabilities and stockholders’ equity	($221,631)	($206,111)	'	'

Condensed_Consolidating_Financ4

Condensed Consolidating Financial Information - Condensed Consolidating Statement of Operations (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues:	'	'	'	'
Total revenues	$114,736	$70,434	$232,765	$125,434
Costs and expenses:	'	'	'	'
Lease operating expenses	12,680	5,878	24,309	11,050
Production taxes	6,601	6,440	13,558	13,310
Midstream processing and marketing	10,780	1,901	18,549	2,318
Depreciation, depletion and amortization	55,994	28,540	112,871	51,123
General and administrative	10,382	4,900	19,893	9,312
Accretion expense	189	174	377	349
(Gain) loss on sale of assets	0	145	-11	572
Total costs and expenses	96,626	47,978	189,546	88,034
INCOME FROM OPERATIONS	18,110	22,456	43,219	37,400
OTHER (INCOME) EXPENSE:	'	'	'	'
Interest expense	2,402	3,284	6,287	6,763
Interest income	-36	-62	-142	-141
Litigation settlement	6,000	0	24,000	0
Income from equity method investments	-69,569	-50,108	-198,044	-111,318
Total Other (Income) Expense	-61,203	-46,886	-167,899	-104,696
INCOME BEFORE INCOME TAXES	79,313	69,342	211,118	142,096
INCOME TAX EXPENSE	31,461	25,514	80,708	53,709
NET INCOME	47,852	43,828	130,410	88,387
Parent Company [Member]	'	'	'	'
Revenues:	'	'	'	'
Total revenues	114,014	70,033	231,864	124,695
Costs and expenses:	'	'	'	'
Lease operating expenses	12,457	5,714	23,838	10,712
Production taxes	6,529	6,419	13,466	13,267
Midstream processing and marketing	10,758	1,897	18,515	2,310
Depreciation, depletion and amortization	55,993	28,539	112,870	51,122
General and administrative	10,346	4,859	19,834	9,237
Accretion expense	189	174	377	349
(Gain) loss on sale of assets	'	145	-11	572
Total costs and expenses	96,272	47,747	188,889	87,569
INCOME FROM OPERATIONS	17,742	22,286	42,975	37,126
OTHER (INCOME) EXPENSE:	'	'	'	'
Interest expense	2,402	3,284	6,287	6,763
Interest income	-36	-62	-142	-141
Litigation settlement	6,000	'	24,000	'
Income from equity method investments	-69,937	-50,278	-198,288	-111,592
Total Other (Income) Expense	-61,571	-47,056	-168,143	-104,970
INCOME BEFORE INCOME TAXES	79,313	69,342	211,118	142,096
INCOME TAX EXPENSE	31,461	25,514	80,708	53,709
NET INCOME	47,852	43,828	130,410	88,387
Guarantor [Member]	'	'	'	'
Revenues:	'	'	'	'
Total revenues	722	401	901	739
Costs and expenses:	'	'	'	'
Lease operating expenses	223	164	471	338
Production taxes	72	21	92	43
Midstream processing and marketing	22	4	34	8
Depreciation, depletion and amortization	1	1	1	1
General and administrative	35	38	62	72
Accretion expense	0	0	0	0
(Gain) loss on sale of assets	'	0	0	0
Total costs and expenses	353	228	660	462
INCOME FROM OPERATIONS	369	173	241	277
OTHER (INCOME) EXPENSE:	'	'	'	'
Interest expense	0	0	0	0
Interest income	0	0	0	0
Litigation settlement	0	'	0	'
Income from equity method investments	0	0	0	0
Total Other (Income) Expense	0	0	0	0
INCOME BEFORE INCOME TAXES	369	173	241	277
INCOME TAX EXPENSE	0	0	0	0
NET INCOME	369	173	241	277
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 processing and marketing	0	0	0	0
Depreciation, depletion and amortization	0	0	0	0
General and administrative	1	3	-3	3
Accretion expense	0	0	0	0
(Gain) loss on sale of assets	'	0	0	0
Total costs and expenses	1	3	-3	3
INCOME FROM OPERATIONS	-1	-3	3	-3
OTHER (INCOME) EXPENSE:	'	'	'	'
Interest expense	0	0	0	0
Interest income	0	0	0	0
Litigation settlement	0	'	0	'
Income from equity method investments	2,228	730	4,229	1,262
Total Other (Income) Expense	2,228	730	4,229	1,262
INCOME BEFORE INCOME TAXES	-2,229	-733	-4,226	-1,265
INCOME TAX EXPENSE	0	0	0	0
NET INCOME	-2,229	-733	-4,226	-1,265
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 processing and marketing	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) loss on sale of assets	'	0	0	0
Total costs and expenses	'	0	0	0
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	'
Income from equity method investments	-1,860	-560	-3,985	-988
Total Other (Income) Expense	-1,860	-560	-3,985	-988
INCOME BEFORE INCOME TAXES	1,860	560	3,985	988
INCOME TAX EXPENSE	0	0	0	0
NET INCOME	$1,860	$560	$3,985	$988

Condensed_Consolidating_Financ5

Condensed Consolidating Financial Information - Condensed Consolidating Statements of Comprehensive Income (Loss) (Details) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Condensed Financial Statements, Captions [Line Items]	'		'		'		'
Net income	$47,852		$43,828		$130,410		$88,387
Foreign currency translation adjustment	6,816		-6,113		-462		-9,680
Change in fair value of derivative instruments, net of taxes	0	[1]	356	[1]	0	[1]	-1,074	[1]
Reclassification of settled contracts, net of taxes	0	[2]	1,404	[2]	0	[2]	3,201	[2]
Other comprehensive income (loss)	6,816		-4,353		-462		-7,553
Comprehensive income	54,668		39,475		129,948		80,834
Parent Company [Member]	'		'		'		'
Condensed Financial Statements, Captions [Line Items]	'		'		'		'
Net income	47,852		43,828		130,410		88,387
Foreign currency translation adjustment	6,816		-6,113		-462		-9,680
Change in fair value of derivative instruments, net of taxes	'		356		'		-1,074
Reclassification of settled contracts, net of taxes	'		1,404		'		3,201
Other comprehensive income (loss)	6,816		-4,353		-462		-7,553
Comprehensive income	54,668		39,475		129,948		80,834
Guarantor [Member]	'		'		'		'
Condensed Financial Statements, Captions [Line Items]	'		'		'		'
Net income	369		173		241		277
Foreign currency translation adjustment	0		0		0		0
Change in fair value of derivative instruments, net of taxes	'		0		'		0
Reclassification of settled contracts, net of taxes	'		0		'		0
Other comprehensive income (loss)	0		0		0		0
Comprehensive income	369		173		241		277
Non-Guarantor [Member]	'		'		'		'
Condensed Financial Statements, Captions [Line Items]	'		'		'		'
Net income	-2,229		-733		-4,226		-1,265
Foreign currency translation adjustment	6,816		-6,113		-462		-9,680
Change in fair value of derivative instruments, net of taxes	'		0		'		0
Reclassification of settled contracts, net of taxes	'		0		'		0
Other comprehensive income (loss)	6,816		-6,113		-462		-9,680
Comprehensive income	4,587		-6,846		-4,688		-10,945
Eliminations [Member]	'		'		'		'
Condensed Financial Statements, Captions [Line Items]	'		'		'		'
Net income	1,860		560		3,985		988
Foreign currency translation adjustment	-6,816		6,113		462		9,680
Change in fair value of derivative instruments, net of taxes	'		0		'		0
Reclassification of settled contracts, net of taxes	'		0		'		0
Other comprehensive income (loss)	-6,816		6,113		462		9,680
Comprehensive income	($4,956)		$6,673		$4,447		$10,668
[1]	Net of $0.0 million and $0.0 million in taxes for the three and six months ended June 30, 2014, respectively, and net of $0.2 million and $(0.7) million in taxes for the three and six months ended June 30, 2013, respectively.
[2]	Net of $0.0 million and $0.0 million in taxes for the three and six months ended June 30, 2014, respectively, and net of $0.9 million and $2.0 million in taxes for the three and six months ended June 30, 2013, respectively.

Condensed_Consolidating_Financ6

Condensed Consolidating Financial Information - Condensed Consolidating Statement of Cash Flows (Details) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Condensed Financial Statements, Captions [Line Items]	'	'
Net cash provided by (used in) operating activities	$201,509	$73,545
Net cash provided by (used in) investing activities	-624,760	-384,529
Net cash provided by (used in) financing activities	39,588	358,281
Net (decrease) increase in cash and cash equivalents	-383,663	47,297
Cash and cash equivalents at beginning of period	458,956	167,088
Cash and cash equivalents at end of period	75,293	214,385
Parent Company [Member]	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Net cash provided by (used in) operating activities	203,057	73,633
Net cash provided by (used in) investing activities	-621,155	-383,817
Net cash provided by (used in) financing activities	39,588	358,281
Net (decrease) increase in cash and cash equivalents	-378,510	48,097
Cash and cash equivalents at beginning of period	451,431	165,293
Cash and cash equivalents at end of period	72,921	213,390
Guarantor [Member]	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Net cash provided by (used in) operating activities	-1,546	-88
Net cash provided by (used in) investing activities	-3,608	-712
Net cash provided by (used in) financing activities	0	0
Net (decrease) increase in cash and cash equivalents	-5,154	-800
Cash and cash equivalents at beginning of period	7,525	1,795
Cash and cash equivalents at end of period	2,371	995
Non-Guarantor [Member]	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Net cash provided by (used in) operating activities	-2	0
Net cash provided by (used in) investing activities	-16,569	-15,055
Net cash provided by (used in) financing activities	16,572	15,055
Net (decrease) increase in cash and cash equivalents	1	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	1	0
Eliminations [Member]	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Net cash provided by (used in) operating activities	0	0
Net cash provided by (used in) investing activities	16,572	15,055
Net cash provided by (used in) financing activities	-16,572	-15,055
Net (decrease) increase 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