10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934.

For the quarterly period ended June 30, 2018

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934.

Commission file number 1-10447

CABOT OIL & GAS CORPORATION

(Exact name of registrant as specified in its charter)

DELAWARE	04-3072771
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification Number)

Three Memorial City Plaza

840 Gessner Road, Suite 1400, Houston, Texas 77024

(Address of principal executive offices including ZIP code)

(281) 589-4600

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months and (2) has been subject to such filing requirements for the past 90 days. Yes ý No o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ý No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and "emerging growth company" in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer ý	Accelerated filer o
Non-accelerated filer o	Smaller reporting company o
	Emerging growth company o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o No ý

As of July 25, 2018, there were 441,177,384 shares of Common Stock, Par Value $0.10 Per Share, outstanding.

CABOT OIL & GAS CORPORATION

INDEX TO FINANCIAL STATEMENTS

		Page
Part I. Financial Information
Item 1.	Financial Statements
Condensed Consolidated Balance Sheet (Unaudited) at June 30, 2018 and December 31, 2017		3
Condensed Consolidated Statement of Operations (Unaudited) for the Three and Six Months Ended June 30, 2018 and 2017		4
Condensed Consolidated Statement of Cash Flows (Unaudited) for the Six Months Ended June 30, 2018 and 2017		5
Notes to the Condensed Consolidated Financial Statements		6
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	18
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	27
Item 4.	Controls and Procedures	29
Part II. Other Information
Item 1.	Legal Proceedings	29
Item 1A.	Risk Factors	29
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	30
Item 6.	Exhibits	30
Signatures		31

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PART I. FINANCIAL INFORMATION

ITEM 1.Financial Statements

CABOT OIL & GAS CORPORATION

CONDENSED CONSOLIDATED BALANCE SHEET (Unaudited)

(In thousands, except share amounts)	June 30, 2018			December 31, 2017
ASSETS
Current assets
Cash and cash equivalents	$	740,994		$	480,047
Accounts receivable, net	180,545			216,004
Income taxes receivable	41,512			56,666
Inventories	20,470			8,006
Current assets held for sale	—			1,440
Other current assets	3,892			2,794
Total current assets	987,413			764,957
Properties and equipment, net (Successful efforts method)	3,225,493			3,072,204
Equity method investments	147,984			86,077
Assets held for sale	6,828			778,855
Derivative instruments	3,412			2,239
Other assets	25,580			23,012
	$	4,396,710		$	4,727,344
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities
Accounts payable	$	235,978		$	238,045
Current portion of long-term debt	304,000			304,000
Accrued liabilities	13,817			27,441
Interest payable	27,360			27,575
Derivative instruments	9,589			30,637
Current liabilities held for sale	—			2,352
Total current liabilities	590,744			630,050
Long-term debt, net	1,218,572			1,217,891
Deferred income taxes	293,927			227,030
Asset retirement obligations	46,527			43,601
Liabilities held for sale	1,867			15,748
Postretirement benefits	30,351			29,396
Other liabilities	60,548			39,723
Total liabilities	2,242,536			2,203,439
Commitments and contingencies
Stockholders' equity
Common stock:
Authorized — 960,000,000 shares of $0.10 par value in 2018 and 2017, respectively
Issued — 476,086,079 shares and 475,547,419 shares in 2018 and 2017, respectively	47,609			47,555
Additional paid-in capital	1,749,437			1,742,419
Retained earnings	1,266,928			1,162,430
Accumulated other comprehensive income (loss)	2,248			2,077
Less treasury stock, at cost:
34,909,705 shares and 14,935,926 shares in 2018 and 2017, respectively	(912,048		)	(430,576		)
Total stockholders' equity	2,154,174			2,523,905
	$	4,396,710		$	4,727,344

The accompanying notes are an integral part of these condensed consolidated financial statements.

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CABOT OIL & GAS CORPORATION

CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS (Unaudited)

	Three Months Ended   June 30,						Six Months Ended   June 30,
(In thousands, except per share amounts)	2018			2017			2018			2017
OPERATING REVENUES
Natural gas	$	364,660		$	395,328		$	776,768		$	828,770
Crude oil and condensate	—			44,625			48,722			87,616
Gain (loss) on derivative instruments	(3,668		)	13,805			1,909			47,190
Brokered natural gas	92,576			4,037			97,526			8,732
Other	(121		)	2,662			1,749			5,994
	453,447			460,457			926,674			978,302
OPERATING EXPENSES
Direct operations	15,657			27,262			35,727			51,903
Transportation and gathering	114,189			120,544			226,314			244,018
Brokered natural gas	80,082			3,419			85,032			7,465
Taxes other than income	5,392			8,310			12,582			17,368
Exploration	54,500			3,959			58,117			10,157
Depreciation, depletion and amortization	84,910			144,322			167,038			279,422
Impairment of oil and gas properties and other assets	—			68,555			—			68,555
General and administrative	21,228			23,957			45,288			47,659
	375,958			400,328			630,098			726,547
Loss on equity method investments	(4		)	(1,286		)	(998		)	(2,569		)
Gain (loss) on sale of assets	544			(1,403		)	(40,505		)	(1,626		)
INCOME FROM OPERATIONS	78,029			57,440			255,073			247,560
Interest expense, net	23,328			20,619			43,386			41,390
Other (income) expense	118			(315		)	232			109
Income before income taxes	54,583			37,136			211,455			206,061
Income tax expense	12,152			15,609			51,793			78,814
NET INCOME	$	42,431		$	21,527		$	159,662		$	127,247
Earnings per share
Basic	$	0.09		$	0.05		$	0.35		$	0.27
Diluted	$	0.09		$	0.05		$	0.35		$	0.27
Weighted-average common shares outstanding
Basic	451,055			464,768			455,361			465,057
Diluted	453,114			466,745			457,142			466,752
Dividends per common share	$	0.06		$	0.05		$	0.12		$	0.07

The accompanying notes are an integral part of these condensed consolidated financial statements.

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CABOT OIL & GAS CORPORATION

CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited)

	Six Months Ended   June 30,
(In thousands)	2018			2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$	159,662		$	127,247
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation, depletion and amortization	167,038			279,422
Impairment of oil and gas properties and other assets	—			68,555
Deferred income tax expense	66,976			73,394
Loss on sale of assets	40,505			1,626
Exploratory dry hole cost	51,085			2,842
Gain on derivative instruments	(1,909		)	(47,190		)
Net cash paid in settlement of derivative instruments	(20,312		)	(319		)
Loss on equity method investments	998			2,569
Amortization of debt issuance costs	2,390			2,384
Stock-based compensation and other	10,364			18,198
Changes in assets and liabilities:
Accounts receivable, net	38,939			13,713
Income taxes	12,107			(6,166		)
Inventories	(12,377		)	(4		)
Other current assets	(1,096		)	(1,776		)
Accounts payable and accrued liabilities	7,168			(4,339		)
Interest payable	(215		)	(311		)
Other assets and liabilities	25,337			101
Net cash provided by operating activities	546,660			529,946
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(387,271		)	(393,333		)
Proceeds from sale of assets	646,868			1,475
Investment in equity method investments	(62,905		)	(13,626		)
Net cash provided by (used in) investing activities	196,692			(405,484		)
CASH FLOWS FROM FINANCING ACTIVITIES
Treasury stock repurchases	(419,654		)	(68,255		)
Dividends paid	(54,718		)	(32,582		)
Tax withholdings on vesting of stock awards	(8,033		)	(5,672		)
Other	—			39
Net cash used in financing activities	(482,405		)	(106,470		)
Net increase in cash and cash equivalents	260,947			17,992
Cash and cash equivalents, beginning of period	480,047			498,542
Cash and cash equivalents, end of period	$	740,994		$	516,534

The accompanying notes are an integral part of these condensed consolidated financial statements.

5

CABOT OIL & GAS CORPORATION

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited)

1. Financial Statement Presentation

During interim periods, Cabot Oil & Gas Corporation (the Company) follows the same accounting policies disclosed in its Annual Report on Form 10-K/A for the year ended December 31, 2017 (Form 10-K/A) filed with the Securities and Exchange Commission (SEC). The interim financial statements should be read in conjunction with the notes to the consolidated financial statements and information presented in the Form 10-K/A. In management’s opinion, the accompanying interim condensed consolidated financial statements contain all material adjustments, consisting only of normal recurring adjustments, necessary for a fair statement. The results for any interim period are not necessarily indicative of the expected results for the entire year.

Certain reclassifications have been made to prior year statements to conform with the current year presentation. These reclassifications had no impact on previously reported stockholders' equity, net income or cash flows.

Recently Adopted Accounting Pronouncements

Revenue Recognition. In May 2014, the Financial Accounting Standards Boards (FASB) issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606) (Accounting Standards Codification (ASC) 606, as subsequently amended). ASC 606 supersedes the revenue recognition requirements in Topic 605 Revenue Recognition (ASC 605), and requires entities to recognize revenue when control of the promised goods or services is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The Company adopted ASC 606 as of January 1, 2018 using the modified retrospective transition method.

The adoption of ASC 606 also included the adoption and modification of other guidance, particularly the creation of ASC 340-40 on costs to obtain or fulfill contracts with customers and ASC 610-20 on gains or losses on derecognition of nonfinancial assets. ASC 340-40 provides additional capitalization, amortization and impairment guidance for certain costs associated with obtaining or fulfilling contracts subject to ASC 606. ASC 610-20 provides guidance on the measurement and recognition of gains and losses for disposals of assets that are not the outputs of ordinary activities, such as sales of fixed assets, when they are not businesses or deconsolidation of subsidiaries. The guidance in ASC 610-20 largely aligns with the guidance in ASC 606. It also supersedes most guidance on real estate sales that was contained in ASC 360-20; however, it does not apply to conveyances of oil and gas interests, which continue to be governed by guidance in ASC 932 for oil and gas extractive activities.

There was no material effect from the adoption of ASC 340-40 or ASC 610-20 separate from those discussed from the adoption of ASC 606.

Financial Instruments. In January 2016, the FASB issued ASU 2016-01, Financial Instruments - Overall, as an amendment to ASC Subtopic 825-10. The amendments in this update address certain aspects of recognition, measurement, presentation and disclosure of financial instruments. Among other items, this update will simplify the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment. When a qualitative assessment indicates that impairment exists, an entity is required to measure the investment at fair value. This impairment assessment reduces the complexity of the other-than-temporary impairment guidance that entities follow currently. The Company adopted ASU 2016-01 as of January 1, 2018. The adoption of this guidance did not have a material effect on the Company's financial position, results of operation or cash flows.

Statement of Cash Flows.In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230), which is intended to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. The guidance addresses eight specific cash flow issues for which current accounting guidance is either unclear or does not include specific guidance. The Company adopted this guidance effective January 1, 2018. In conjunction with the adoption, the Company made an accounting policy election to classify distributions it receives from its equity method investees based on the nature of distributions approach in which distributions received are classified on the basis of the nature of the activity that generated the distribution as either a return on investment (cash inflows from operating activities) or a return of investment (cash inflows from investing activities). The adoption of this guidance did not have a material effect on the Company's financial position, results of operation or cash flows.

Recently Issued Accounting Pronouncements

Leases. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). The new lease guidance supersedes Topic 840. The core principle of the guidance is that entities should recognize the assets and liabilities that arise from leases.

6

This ASU does not apply to leases to explore for or use minerals, oil, natural gas and similar nonregenerative resources, including the intangible right to explore for those natural resources and rights to use the land in which those natural resources are contained. The guidance is effective for interim and annual periods beginning after December 15, 2018. This ASU is to be adopted using a modified retrospective approach. The Company plans to adopt this guidance effective January 1, 2019 and is currently evaluating the effect that adopting this guidance will have on its financial position, results of operations or cash flows.

Additionally, in January 2018, the FASB issued ASU No. 2018-01, Leases (Topic 842): Practical Expedient for Transition. The amendments in this update provide an optional transition to not evaluate existing or expired land easements that were not previously accounted for under current leases guidance in Topic 840. An entity that elects this practical expedient should evaluate new or modified land easements beginning at the date of adoption. An entity that does not elect this practical expedient should evaluate all existing or expired land easements in connection with the adoption of the new lease requirements in Topic 842 to assess whether they meet the definition of a lease. The Company is currently evaluating this guidance to determine whether or not to make use of this practical expedient.

Revenue Recognition

On January 1, 2018, the Company adopted ASC 606, Revenue from Contracts with Customers, and the related guidance in ASC 340-40 (the new revenue standard), and related guidance on gains and losses on derecognition of nonfinancial assets ASC 610-20, using the modified retrospective method applied to those contracts which were not completed as of January 1, 2018. Under the modified retrospective method, the Company recognizes the cumulative effect of initially applying the new revenue standard as an adjustment to the opening balance of retained earnings; however, no significant adjustment was required as a result of adopting the new revenue standard. Results for reporting periods beginning after January 1, 2018 are presented under the new revenue standard. The comparative information has not been restated and continues to be reported under the historic accounting standards in effect for those periods. The impact of the adoption of the new revenue standard is expected to be immaterial to the Company’s net income on an ongoing basis.

The Company’s revenue is typically generated from contracts to sell natural gas, crude oil or NGLs produced from interests in oil and gas properties owned by the Company. These contracts generally require the Company to deliver a specific amount of a commodity per day for a specified number of days at a price that is either fixed or variable. The contracts specify a delivery point which represents the point at which control of the product is transferred to the customer. These contracts frequently meet the definition of a derivative under ASC 815, and are accounted for as derivatives unless the Company elects to treat them as normal sales as permitted under that guidance. The Company typically elects to treat contracts to sell oil and gas production as normal sales, which are then accounted for as contracts with customers. The Company has determined that these contracts represent multiple performance obligations which are satisfied when control of the commodity transfers to the customer, typically through the delivery of the specified commodity to a designated delivery point.

Revenue is measured based on consideration specified in the contract with the customer, and excludes any amounts collected on behalf of third parties. The Company recognizes revenue in the amount that reflects the consideration it expects to be entitled to in exchange for transferring control of those goods to the customer. The contract consideration in the Company’s variable price contracts are typically allocated to specific performance obligations in the contract according to the price stated in the contract. Amounts allocated in the Company’s fixed price contracts are based on the standalone selling price of those products in the context of long-term, fixed price contracts, which generally approximates the contract price. Payment is generally received one or two months after the sale has occurred.

Gain or loss on derivative instruments is outside the scope of ASC 606 and is not considered revenue from contracts with customers subject to ASC 606. The Company may use financial or physical contracts accounted for as derivatives as economic hedges to manage price risk associated with normal sales, or in limited cases may use them for contracts the Company intends to physically settle but do not meet all of the criteria to be treated as normal sales.

Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, and that are collected by the Company from a customer, are excluded from revenue.

Producer Gas Imbalances. The Company applies the sales method of accounting for natural gas revenue. Under this method, revenues are recognized based on the actual volume of natural gas sold to purchasers. Natural gas production operations may include joint owners who take more or less than the production volumes entitled to them on certain properties. Production volume is monitored to minimize these natural gas imbalances. Under this method, a natural gas imbalance liability is recorded if the Company's excess takes of natural gas exceed its estimated remaining proved developed reserves for these properties at the actual price realized upon the gas sale. A receivable is recognized only to the extent an imbalance cannot be recouped from the reserves in the underlying properties. The Company’s aggregate imbalance positions at June 30, 2018 and December 31, 2017 were not material.

7

Brokered Natural Gas. Revenues and expenses related to brokered natural gas are reported gross as part of operating revenues and operating expenses in accordance with applicable accounting standards. The Company buys and sells natural gas utilizing separate purchase and sale transactions whereby the Company or the counterparty obtains control of the natural gas purchased or sold.

Disaggregation of Revenue. The following table presents revenues disaggregated by product:

	Three Months Ended June 30,					Six Months Ended June 30,
(In thousands)	2018			2017(1)		2018		2017(1)
OPERATING REVENUES
Natural gas	$	364,660		$	395,328	$	776,768	$	828,770
Crude oil and condensate	—			44,625		48,722		87,616
Brokered natural gas	92,576			4,037		97,526		8,732
Other	(121		)	2,662		1,749		5,994
Total revenues from contracts with customers	457,115			446,652		924,765		931,112
Gain (loss) on derivative instruments	(3,668		)	13,805		1,909		47,190
Total operating revenues	$	453,447		$	460,457	$	926,674	$	978,302

_______________________________________________________________________________

(1) As noted above, prior period amounts have not been adjusted under the modified retrospective method.

All of the Company’s revenues from contracts with customers represent products transferred at a point in time as control is transferred to the customer and are generated in the United States.

Transaction Price Allocated to Remaining Performance Obligations. A significant number of the Company’s product sales are short-term in nature with a contract term of one year or less. For those contracts, the Company has utilized the practical expedient exempting the Company from disclosure of the transaction price allocated to remaining performance obligations if the performance obligation is part of a contract that has an original expected duration of one year or less.

As of June 30, 2018, the Company has $8.6 billion of unsatisfied performance obligations related to natural gas sales that have a fixed pricing component and a contract term greater than one year. The Company expects to recognize these obligations over the next 20 years.

Contract Balances. Receivables from contracts with customers are recorded when the right to consideration becomes unconditional, generally when control of the product has been transferred to the customer. Receivables from contracts with customers were $175.4 million and $215.5 million as of June 30, 2018 and December 31, 2017, respectively, and are reported in accounts receivable, net on the Condensed Consolidated Balance Sheet. The Company currently has no assets or liabilities related to its revenue contracts, including no upfront or rights to deficiency payments.

Practical Expedients. The Company has made use of certain practical expedients in adopting the new revenue standard, including the value of unsatisfied performance obligations are not disclosed for (i) contracts with an original expected length of one year or less, (ii) contracts for which the Company recognizes revenue at the amount to which the Company has the right to invoice, (iii) variable consideration which is allocated entirely to a wholly unsatisfied performance obligation and meets the variable allocation criteria in the standard and (iv) only contracts that are not completed at transition.

The Company has not adjusted the promised amount of consideration for the effects of a significant financing component if the Company expects, at contract inception, that the period between when the Company transfers a promised good or service to the customer and when the customer pays for that good or service will be one year or less.

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2. Properties and Equipment, Net

Properties and equipment, net are comprised of the following:

(In thousands)	June 30, 2018			December 31, 2017
Proved oil and gas properties	$	5,247,016		$	4,932,512
Unproved oil and gas properties	189,436			190,474
Gathering and pipeline systems	1,569			1,569
Land, building and other equipment	83,293			82,670
	5,521,314			5,207,225
Accumulated depreciation, depletion and amortization	(2,295,821		)	(2,135,021		)
	$	3,225,493		$	3,072,204

At June 30, 2018, the Company did not have any projects that had exploratory well costs capitalized for a period of greater than one year after drilling.

Divestitures

In February 2018, the Company sold its operated and non-operated Eagle Ford Shale assets for $765.0 million. During the fourth quarter of 2017, the Company classified these assets as held for sale and recorded an impairment charge of $414.3 million associated with the proposed sale of these properties. The Company recognized a loss on sale of oil and gas properties of $44.2 million.

Subsequent Event. In July 2018, the Company closed on the sale of its oil and gas properties in the Haynesville Shale for $30.0 million. The sales price included a $5.0 million deposit that was received in the fourth quarter of 2017. Beginning with the fourth quarter of 2017, the Company classified these assets as held for sale.

3. Equity Method Investments

The Company holds a 25% equity interest in Constitution Pipeline Company, LLC (Constitution) and a 20% equity interest in Meade Pipeline Co LLC (Meade). Activity related to these equity method investments is as follows:

	Constitution						Meade						Total
	Six Months Ended June 30,
(In thousands)	2018			2017			2018			2017			2018			2017
Balance at beginning of period	$	732		$	96,850		$	85,345		$	32,674		$	86,077		$	129,524
Contributions	250			3,125			62,655			10,501			62,905			13,626
Loss on equity method investments	(982		)	(2,555		)	(16		)	(14		)	(998		)	(2,569		)
Balance at end of period	$	—		$	97,420		$	147,984		$	43,161		$	147,984		$	140,581

During 2018, the Company expects to contribute approximately $70.0 million to its equity method investments. For further information regarding the Company’s equity method investments, refer to Note 4 of the Notes to the Consolidated Financial Statements in the Form 10-K/A.

Constitution

As of June 30, 2018, the Company’s carrying value of its investment in Constitution is less than its proportionate share of Constitution’s net assets by $95.9 million. This basis difference is due to the Company’s impairment recorded in the fourth quarter of 2017 and relates entirely to the pipeline assets of Constitution. The Company expects to amortize this basis difference once the related assets of Constitution are placed in service, which may or may not occur, depending on the outcome of the legal and regulatory process related to certain permitting matters.

The Company remains committed to funding the project in an amount proportionate to its ownership interest for the development and construction of the new pipeline.

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4. Debt and Credit Agreements

The Company’s debt and credit agreements consisted of the following:

(In thousands)	June 30, 2018			December 31, 2017
Total debt
6.51% weighted-average senior notes (1)	$	361,000		$	361,000
9.78% senior notes (2)	67,000			67,000
5.58% weighted-average senior notes	175,000			175,000
3.65% weighted-average senior notes	925,000			925,000
Revolving credit facility	—			—
Unamortized debt issuance costs	(5,428		)	(6,109		)
	$	1,522,572		$	1,521,891

_______________________________________________________________________________

(1) Includes $237.0 million of current portion of long-term debt at June 30, 2018 and December 31, 2017, respectively.

(2) Includes $67.0 million of current portion of long-term debt at June 30, 2018 and December 31, 2017, respectively.

The borrowing base under the terms of the Company's revolving credit facility is redetermined annually in April. In addition, either the Company or the banks may request an interim redetermination twice a year or in connection with certain acquisitions or divestitures of oil and gas properties. Effective April 18, 2018, the borrowing base and available commitments were reaffirmed at $3.2 billion and $1.7 billion, respectively. At June 30, 2018, the Company had no borrowings outstanding under its revolving credit facility and had unused commitments of $1.7 billion.

At June 30, 2018, the Company was in compliance with all restrictive financial covenants for both its revolving credit facility and senior notes.

Subsequent Event. In July 2018, the Company repaid $237.0 million of maturities associated with its 6.51% weighted-average senior notes.

5. Derivative Instruments and Hedging Activities

As of June 30, 2018, the Company had the following outstanding financial commodity derivatives:

						Basis Swaps
				Swaps
Type of Contract	Volume		Contract Period	Weighted-Average		Weighted-Average
Natural gas (Leidy)	17.9	Bcf	Jul. 2018 - Dec. 2018			$	(0.69	)
Natural gas (Transco)	16.0	Bcf	Jul. 2018 - Dec. 2019			$	0.42
Natural gas (NYMEX)	46.5	Bcf	Jul. 2018 - Dec. 2018	$	2.93
Natural gas (NYMEX)	6.0	Bcf	Jul. 2018 - Oct. 2018	$	3.10

As of June 30, 2018, the Company had the following outstanding physical commodity derivatives:

Type of Contract	Volume		Contract Period	Weighted-Average Fixed Price
Natural gas purchase	6.0	Bcf	Jul. 2018 - Oct. 2018	$	3.67

In the tables above, natural gas prices are stated per Mcf.

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Effect of Derivative Instruments on the Condensed Consolidated Balance Sheet

		Derivative Assets				Derivative Liabilities
(In thousands)	Balance Sheet Location	June 30, 2018		December 31, 2017		June 30, 2018		December 31, 2017
Commodity contracts	Derivative instruments (current)	$	—	$	—	$	9,589	$	30,637
Commodity contracts	Derivative instruments (non-current)	3,412		2,239		—		—
		$	3,412	$	2,239	$	9,589	$	30,637

Offsetting of Derivative Assets and Liabilities in the Condensed Consolidated Balance Sheet

(In thousands)	June 30, 2018			December 31, 2017
Derivative assets
Gross amounts of recognized assets	$	4,474		$	2,239
Gross amounts offset in the statement of financial position	(1,062		)	—
Net amounts of assets presented in the statement of financial position	3,412			2,239
Gross amounts of financial instruments not offset in the statement of financial position	—			—
Net amount	$	3,412		$	2,239
Derivative liabilities
Gross amounts of recognized liabilities	$	10,651		$	30,637
Gross amounts offset in the statement of financial position	(1,062		)	—
Net amounts of liabilities presented in the statement of financial position	9,589			30,637
Gross amounts of financial instruments not offset in the statement of financial position	—			241
Net amount	$	9,589		$	30,878

Effect of Derivative Instruments on the Condensed Consolidated Statement of Operations

	Three Months Ended   June 30,					Six Months Ended   June 30,
(In thousands)	2018			2017		2018			2017
Cash received (paid) on settlement of derivative instruments
Gain (loss) on derivative instruments	$	5,819		$	1,204	$	(20,312	)	$	(319	)
Non-cash gain (loss) on derivative instruments
Gain (loss) on derivative instruments	(9,487		)	12,601		22,221			47,509
	$	(3,668	)	$	13,805	$	1,909		$	47,190

6. Fair Value Measurements

The Company follows the authoritative guidance for measuring fair value of assets and liabilities in its financial statements. For further information regarding the fair value hierarchy, refer to Note 1 of the Notes to the Consolidated Financial Statements in the Form 10-K/A.

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Financial Assets and Liabilities

The following fair value hierarchy table presents information about the Company’s financial assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at    June 30, 2018
Assets
Deferred compensation plan	$	16,050	$	—	$	—	$	16,050
Derivative instruments	—		577		3,897		4,474
Total assets	$	16,050	$	577	$	3,897	$	20,524
Liabilities
Deferred compensation plan	$	27,849	$	—	$	—	$	27,849
Derivative instruments	—		5,415		5,236		10,651
Total liabilities	$	27,849	$	5,415	$	5,236	$	38,500

(In thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at    December 31, 2017
Assets
Deferred compensation plan	$	14,966	$	—	$	—	$	14,966
Derivative instruments	—		—		2,239		2,239
Total assets	$	14,966	$	—	$	2,239	$	17,205
Liabilities
Deferred compensation plan	$	29,145	$	—	$	—	$	29,145
Derivative instruments	—		—		30,637		30,637
Total liabilities	$	29,145	$	—	$	30,637	$	59,782

The Company’s investments associated with its deferred compensation plan consist of mutual funds and deferred shares of the Company’s common stock that are publicly traded and for which market prices are readily available.

The derivative instruments were measured based on quotes from the Company’s counterparties or internal models. Such quotes and models have been derived using an income approach that considers various inputs including current market and contractual prices for the underlying instruments, quoted forward prices for natural gas and crude oil, basis differentials and interest rates, such as a LIBOR curve for a similar length of time as the derivative contract term as applicable. Estimates are verified using relevant NYMEX futures contracts and/or are compared to multiple quotes obtained from counterparties for reasonableness. The determination of the fair values presented above also incorporates a credit adjustment for non-performance risk. The Company measured the non-performance risk of its counterparties by reviewing credit default swap spreads for the various financial institutions with which it has derivative transactions, while non-performance risk of the Company is evaluated using a market credit spread provided by the Company’s bank. The Company has not incurred any losses related to non-performance risk of its counterparties and does not anticipate any material impact on its financial results due to non-performance by third parties.

The most significant unobservable inputs relative to the Company’s Level 3 derivative contracts are basis differentials. An increase (decrease) in these unobservable inputs would result in an increase (decrease) in fair value, respectively. The Company does not have access to the specific assumptions used in its counterparties’ valuation models. Consequently, additional disclosures regarding significant Level 3 unobservable inputs were not provided.

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The following table sets forth a reconciliation of changes in the fair value of financial assets and liabilities classified as Level 3 in the fair value hierarchy:

	Six Months Ended   June 30,
(In thousands)	2018			2017
Balance at beginning of period	$	(28,398	)	$	(15,868	)
Total gain (loss) included in earnings	9,019			30,758
Settlement (gain) loss	18,040			(3,537		)
Transfers in and/or out of level 3	—			—
Balance at end of period	$	(1,339	)	$	11,353
Change in unrealized gains (losses) relating to assets and liabilities still held at the end of the period	$	(1,276	)	$	17,915

There were no transfers between Level 1 and Level 2 fair value measurements for the six months ended June 30, 2018 and 2017.

Non-Financial Assets and Liabilities

The Company discloses or recognizes its non-financial assets and liabilities, such as impairments, at fair value on a nonrecurring basis. As none of the Company’s other non-financial assets and liabilities were measured at fair value as of June 30, 2018, additional disclosures were not required.

The estimated fair value of the Company’s asset retirement obligations at inception is determined by utilizing the income approach by applying a credit-adjusted risk-free rate, which takes into account the Company’s credit risk, the time value of money, and the current economic state to the undiscounted expected abandonment cash flows. Given the unobservable nature of the inputs, the measurement of the asset retirement obligations was classified as Level 3 in the fair value hierarchy.

Fair Value of Other Financial Instruments

The estimated fair value of other financial instruments is the amount at which the instrument could be exchanged currently between willing parties. The carrying amount reported in the Condensed Consolidated Balance Sheet for cash and cash equivalents approximates fair value due to the short-term maturities of these instruments. Cash and cash equivalents are classified as Level 1 in the fair value hierarchy and the remaining financial instruments are classified as Level 2.

The Company uses available market data and valuation methodologies to estimate the fair value of debt. The fair value of debt is the estimated amount the Company would have to pay a third party to assume the debt, including a credit spread for the difference between the issue rate and the period end market rate. The credit spread is the Company’s default or repayment risk. The credit spread (premium or discount) is determined by comparing the Company’s senior notes and revolving credit facility to new issuances (secured and unsecured) and secondary trades of similar size and credit statistics for both public and private debt. The fair value of all senior notes and the revolving credit facility is based on interest rates currently available to the Company. The Company’s debt is valued using an income approach and classified as Level 3 in the fair value hierarchy.

The carrying amount and fair value of debt is as follows:

	June 30, 2018						December 31, 2017
(In thousands)	Carrying Amount			Estimated Fair Value			Carrying Amount			Estimated Fair Value
Long-term debt	$	1,522,572		$	1,486,210		$	1,521,891		$	1,527,624
Current maturities	(304,000		)	(305,966		)	(304,000		)	(312,055		)
Long-term debt, excluding current maturities	$	1,218,572		$	1,180,244		$	1,217,891		$	1,215,569

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7. Asset Retirement Obligations

Activity related to the Company’s asset retirement obligations is as follows:

(In thousands)	Six Months Ended   June 30, 2018
Balance at beginning of period(1)	$	48,553
Liabilities incurred	2,322
Liabilities settled	(789		)
Liabilities divested	(3,782		)
Accretion expense	1,223
Balance at end of period(2)	$	47,527

_______________________________________________________________________________

(1) Includes $5.0 million of current asset retirement obligations included in accrued liabilities at December 31, 2017.

(2) Includes $1.0 million of current asset retirement obligations included in accrued liabilities at June 30, 2018.

8. Commitments and Contingencies

Contractual Obligations

The Company has various contractual obligations in the normal course of its operations. There have been no material changes to the Company’s contractual obligations described under “Transportation and Gathering Agreements” and "Lease Commitments” as disclosed in Note 9 of the Notes to Consolidated Financial Statements in the Form 10-K/A.

Legal Matters

The Company is a defendant in various legal proceedings arising in the normal course of business. All known liabilities are accrued when management determines they are probable based on its best estimate of the potential loss. While the outcome and impact of these legal proceedings on the Company cannot be predicted with certainty, management believes that the resolution of these proceedings will not have a material effect on the Company’s financial position, results of operations or cash flows.

Contingency Reserves. When deemed necessary, the Company establishes reserves for certain legal proceedings. The establishment of a reserve is based on an estimation process that includes the advice of legal counsel and subjective judgment of management. While management believes these reserves to be adequate, it is reasonably possible that the Company could incur additional losses with respect to those matters in which reserves have been established. The Company believes that any such amount above the amounts accrued would not be material to the Condensed Consolidated Financial Statements. Future changes in facts and circumstances not currently foreseeable could result in the actual liability exceeding the estimated ranges of loss and amounts accrued.

9. Capital Stock

Treasury Stock

In February 2018, the Board of Directors authorized an increase of 25.0 million shares to the Company’s share repurchase program. After this authorization, the total number of shares available for repurchase was 30.1 million shares. Under the share repurchase program, the Company may purchase shares of common stock in the open market or in negotiated transactions. The timing and amount of any stock purchases are determined at the discretion of management. The Company may use the repurchased shares to fund stock compensation programs currently in existence, or for other corporate purposes. All purchases executed to date have been through open market transactions. There is no expiration date associated with the authorization to repurchase common stock of the Company.

During the first six months of 2018, the Company repurchased 20.0 million shares for a total cost of $481.5 million. As of June 30, 2018, 10.1 million shares are available for repurchase under the share repurchase program.

No treasury shares have been delivered or sold by the Company subsequent to the repurchase. As of June 30, 2018, 34.9 million shares were held as treasury stock, which includes 2.6 million shares that were repurchased prior to June 30, 2018 and settled in July 2018.

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Subsequent Event. In July 2018, the Board of Directors authorized an increase of 20.0 million shares to the Company’s share repurchase program. After this authorization, the total number of shares available for repurchase is 30.1 million shares.

10. Stock-based Compensation

General

From time to time the Company grants certain stock-based compensation awards, including restricted stock awards, restricted stock units and performance share awards. Stock-based compensation expense associated with these awards was $5.7 million and $10.1 million in the second quarter of 2018 and 2017, respectively, and $11.1 million and $18.3 million during the first six months of 2018 and 2017, respectively. Stock-based compensation expense is included in general and administrative expense in the Condensed Consolidated Statement of Operations.

Refer to Note 13 of the Notes to the Consolidated Financial Statements in the Form 10-K/A for further description of the various types of stock-based compensation awards and the applicable award terms.

Restricted Stock Units

During the first six months of 2018, 74,148 restricted stock units were granted to non-employee directors of the Company with a weighted-average grant date value of $23.43 per unit. The fair value of these units is measured based on the closing stock price on grant date and compensation expense is recorded immediately. These units immediately vest and are issued when the director ceases to be a director of the Company.

Performance Share Awards

The performance period for the awards granted during the first six months of 2018 commenced on January 1, 2018 and ends on December 31, 2020. The Company used an annual forfeiture rate assumption ranging from 0% to 5% for purposes of recognizing stock-based compensation expense for its performance share awards.

Performance Share Awards Based on Internal Performance Metrics

The fair value of performance share award grants based on internal performance metrics is based on the closing stock price on the grant date. Each performance share award represents the right to receive up to 100% of the award in shares of common stock. Based on the Company’s probability assessment at June 30, 2018, it is considered probable that the criteria for all performance awards based on internal metrics awards will be met.

Employee Performance Share Awards.During the first six months of 2018, 531,670 Employee Performance Share Awards were granted at a grant date value of $23.25 per share. The performance metrics are set by the Company’s compensation committee and are based on the Company’s average production, average finding costs and average reserve replacement over a three-year performance period.

Hybrid Performance Share Awards.During the first six months of 2018, 321,720 Hybrid Performance Share Awards were granted at a grant date value of $23.25 per share. The 2018 awards vest 25% on each of the first and second anniversary dates and 50% on the third anniversary, provided that the Company has $100 million or more of operating cash flow for the year preceding the vesting date, as set by the Company’s compensation committee. If the Company does not meet the performance metric for the applicable period, then the portion of the performance shares that would have been issued on that anniversary date will be forfeited.

Performance Share Awards Based on Market Conditions

These awards have both an equity and liability component, with the right to receive up to the first 100% of the award in shares of common stock and the right to receive up to an additional 100% of the value of the award in excess of the equity component in cash. The equity portion of these awards is valued on the grant date and is not marked to market, while the liability portion of the awards is valued as of the end of each reporting period on a mark-to-market basis. The Company calculates the fair value of the equity and liability portions of the awards using a Monte Carlo simulation model.

TSR Performance Share Awards. During the first six months of 2018, 482,581 TSR Performance Share Awards were granted and are earned, or not earned, based on the comparative performance of the Company’s common stock measured against a predetermined group of companies in the Company’s peer group over a three-year performance period.

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The following assumptions were used to determine the grant date fair value of the equity component (February 21, 2018) and the period-end fair value of the liability component of the TSR Performance Share Awards:

	Grant Date			June 30, 2018
Fair value per performance share award	$	19.92		$3.50-$13.45
Assumptions:
Stock price volatility	37.3		%	27.1% - 35.1%
Risk free rate of return	2.40		%	2.10% - 2.56%

11. Earnings per Common Share

Basic earnings per share (EPS) is computed by dividing net income by the weighted-average number of common shares outstanding for the period. Diluted EPS is similarly calculated except that the common shares outstanding for the period is increased using the treasury stock method to reflect the potential dilution that could occur if outstanding stock appreciation rights were exercised and stock awards were vested at the end of the applicable period. Anti-dilutive shares represent potentially dilutive securities that are excluded from the computation of diluted income or loss per share as their impact would be anti-dilutive.

The following is a calculation of basic and diluted weighted-average shares outstanding:

	Three Months Ended   June 30,		Six Months Ended   June 30,
(In thousands)	2018	2017	2018	2017
Weighted-average shares - basic	451,055	464,768	455,361	465,057
Dilution effect of stock appreciation rights and stock awards at end of period	2,059	1,977	1,781	1,695
Weighted-average shares - diluted	453,114	466,745	457,142	466,752

The following is a calculation of weighted-average shares excluded from diluted EPS due to the anti-dilutive effect:

	Three Months Ended   June 30,		Six Months Ended   June 30,
(In thousands)	2018	2017	2018	2017
Weighted-average stock appreciation rights and stock awards excluded from diluted EPS due to the anti-dilutive effect calculated using the treasury stock method	—	—	956	774

12. Income Taxes

On December 22, 2017, the U.S. enacted tax legislation referred to as the Tax Cuts and Jobs Act (the Tax Act) which significantly changes U.S. corporate income tax laws beginning, generally, in 2018. These changes include, among others, (i) a permanent reduction of the U.S. corporate income tax rate from a top marginal rate of 35% to a flat rate of 21%, (ii) elimination of the corporate alternative minimum tax, (iii) immediate deductions for certain new investments instead of deductions for depreciation expense over time, (iv) limitation on the tax deduction for interest expense to 30% of adjusted taxable income, (v) limitation of the deduction for net operating losses to 80% of current year taxable income and elimination of net operating loss carrybacks, and (vi) elimination of many business deductions and credits, including the domestic production activities deduction, the deduction for entertainment expenditures, and the deduction for certain executive compensation in excess of $1 million. The Company included the impacts of the Tax Act in the fourth quarter 2017 consolidated financial statements, and no changes were made to those provisional amounts during the first half of 2018. The Company will continue to examine the impact of this legislation and future regulations. Additional impacts from the enactment of the Tax Act will be recorded as they are identified during the measurement period as provided for in SAB No. 118, which extends up to one year from the enactment date. The 2018 tax provision reflects the law changes noted above, including the new corporate tax rate of 21%.

Income tax expense for the first six months of 2018 decreased $27.0 million compared to the first six months of 2017 due to a lower effective tax rate, partially offset by higher pre-tax income. The effective tax rates for the first six months of 2018 and 2017 were 24.5% and 38.2%, respectively. The decrease in the effective tax rate is primarily due to the impact of the Tax Act law changes that were effective January 1, 2018, partially offset by an increase in the blended state statutory tax rate as a result of changes in the Company's state apportionment factors due to the Eagle Ford Shale asset divestiture in February 2018.

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During the second quarter of 2018, the Company recorded an $18.4 million net reserve for unrecognized tax benefits related to alternative minimum tax (AMT) associated with uncertain tax positions and a $5.5 million liability for accrued interest associated with the uncertain tax positions. Any additional AMT payments could be utilized as credits against future regular tax liabilities and would be fully refunded from 2018 through 2021 under the new Tax Act. Accordingly, the uncertain tax positions identified would not have a material impact on the Company's effective tax rate.

13. Additional Balance Sheet Information

Certain balance sheet amounts are comprised of the following:

(In thousands)	June 30, 2018			December 31, 2017
Accounts receivable, net
Trade accounts	$	175,384		$	215,511
Joint interest accounts	1,551			467
Other accounts	4,896			1,312
	181,831			217,290
Allowance for doubtful accounts	(1,286		)	(1,286		)
	$	180,545		$	216,004
Other assets
Deferred compensation plan	$	16,050		$	14,966
Debt issuance costs	6,281			7,990
Income taxes receivable	3,047			—
Other accounts	202			56
	$	25,580		$	23,012
Accounts payable
Trade accounts	$	33,900		$	7,815
Natural gas purchases	27,852			4,299
Royalty and other owners	28,743			39,207
Accrued transportation	40,031			51,433
Accrued capital costs	24,854			31,130
Taxes other than income	9,426			16,801
Deposits received for asset sales	5,000			81,500
Other accounts	66,172			5,860
	$	235,978		$	238,045
Accrued liabilities
Employee benefits	$	11,113		$	20,645
Taxes other than income	1,562			550
Asset retirement obligations	1,000			4,952
Other accounts	142			1,294
	$	13,817		$	27,441
Other liabilities
Deferred compensation plan	$	27,849		$	29,145
Other accounts	32,699			10,578
	$	60,548		$	39,723

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ITEM 2.     Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following review of operations for the three and six month periods ended June 30, 2018 and 2017 should be read in conjunction with our Condensed Consolidated Financial Statements and the Notes included in this Form 10-Q and with the Consolidated Financial Statements, Notes and Management’s Discussion and Analysis included in the Cabot Oil & Gas Corporation Annual Report on Form 10-K/A for the year ended December 31, 2017 (Form 10-K/A).

OVERVIEW

Financial and Operating Overview

Financial and operating results for the six months ended June 30, 2018 compared to the six months ended June 30, 2017 are as follows:

• Natural gas production increased 7.0 Bcf, or 2.1%, from 330.0 Bcf in 2017 to 337.0 Bcf in 2018, as a result of drilling and completion activities in Pennsylvania.

• Crude oil/condensate/NGL production decreased 1.4 Mmbbls, or 62%, from 2.2 Mmbbls in 2017 to 0.8 Mmbbls in 2018, as result of the sale of our Eagle Ford Shale assets in February 2018.

• Equivalent production decreased 1.1 Bcfe, or 0.3%, from 343.1 Bcfe, or 1,895.8 Mmcfe per day, in 2017 to 342.0 Bcfe, or 1,889.5 Mmcfe per day, in 2018. The decrease is primarily due to the sale of our Eagle Ford Shale assets in south Texas.

• Average realized natural gas price was $2.29 per Mcf, 9%lower than the $2.51 per Mcf realized in the comparable period of the prior year.

• Average realized crude oil price was $63.68 per Bbl, 39%higher than the $45.80 per Bbl realized in the comparable period of the prior year.

• Total capital expenditures were $329.9 million compared to $407.3 million in the comparable period of the prior year.

• Drilled 39 gross wells (39.0 net) with a success rate of 87.2% compared to 48 gross wells (42.1 net) with a success rate of 97.9% for the comparable period of the prior year.

• Completed 34 gross wells (34.0 net) in 2018 compared to 51 gross wells (48.0 net) in 2017.

• Average rig count during 2018 was approximately 3.0 rigs in the Marcellus Shale and approximately 1.0 rig in other areas, compared to an average rig count in the Marcellus Shale of approximately 2.0 rigs and approximately 1.0 rig in the Eagle Ford Shale during 2017.

• Received net proceeds of $646.9 million primarily related to the divestiture of our Eagle Ford Shale assets in south Texas in February 2018.

• Repurchased 20.0 million shares of our common stock for $481.5 million in 2018.

Market Conditions and Commodity Prices

Our financial results depend on many factors, particularly commodity prices and our ability to market our production on economically attractive terms. Commodity prices are affected by many factors outside of our control, including changes in market supply and demand, which are impacted by pipeline capacity constraints, inventory storage levels, basis differentials, weather conditions and other factors. In addition, our realized prices are further impacted by our hedging activities. As a result, we cannot accurately predict future commodity prices and, therefore, cannot determine with any degree of certainty what effect increases or decreases in these prices will have on our capital program, production volumes or revenues. We expect commodity prices to remain volatile. In addition to production volumes and commodity prices, finding and developing sufficient amounts of oil and gas reserves at economical costs are critical to our long-term success. For information about the impact of realized commodity prices on our revenues, refer to “Results of Operations” below.

We account for our derivative instruments on a mark-to-market basis with changes in fair value recognized in operating revenues in the Condensed Consolidated Statement of Operations. As a result of these mark-to-market adjustments, we will likely experience volatility in our earnings due to commodity price volatility. Refer to “Impact of Derivative Instruments on Operating Revenues” below and Note 5 of the Notes to the Condensed Consolidated Financial Statements for more information.

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Commodity prices have remained volatile but have improved during 2018 compared to the fourth quarter of 2017. In the event that commodity prices significantly decline, management would test the recoverability of the carrying value of its oil and gas properties and, if necessary, record an impairment charge.

We believe that we are well-positioned to manage the challenges presented in a depressed commodity pricing environment, and that we can endure the continued volatility in current and future commodity prices by:

• Continuing to exercise discipline in our capital program with the expectation of funding our capital expenditures with cash on hand, operating cash flows, and if required, borrowings under our revolving credit facility.

• Continuing to optimize our drilling, completion and operational efficiencies, resulting in lower operating costs per unit of production.

• Continuing to manage our balance sheet, which we believe provides sufficient availability under our revolving credit facility and existing cash balances to meet our capital requirements and maintain compliance with our debt covenants.

• Continuing to manage price risk by strategically hedging our natural gas and crude oil production.

Outlook

Our full year 2018 capital spending program, the majority of which is allocated to the Marcellus Shale, includes approximately $890.0 million in capital expenditures related to our drilling and completion program, leasehold acquisitions and contributions of approximately $70.0 million to our equity method investments. All such expenditures are expected to be funded by existing cash, operating cash flow and if required, borrowings under our revolving credit facility.

In 2017, we drilled 91 gross wells (82.5 net) and completed 105 gross wells (94.2 net), of which 50 gross wells (44.3 net) were drilled but uncompleted in prior years. For the full year of 2018, we plan to drill approximately 85 gross wells (85.0 net) and complete 95 gross wells (95.0 net). We will continue to assess the natural gas environment along with our liquidity position and may increase or decrease our capital expenditures accordingly.

Financial Condition

Capital Resources and Liquidity

Our primary sources of cash for the six months ended June 30, 2018 were from the sale of natural gas and crude oil production and proceeds from the sale of assets. These cash flows were primarily used to fund our capital expenditures, contributions to our equity method investments, interest payments on debt, repurchase of shares of our common stock and payment of dividends. See below for additional discussion and analysis of cash flow.

The borrowing base under the terms of our revolving credit facility is redetermined annually in April. In addition, either we or the banks may request an interim redetermination twice a year or in connection with certain acquisitions or divestitures of oil and gas properties. Effective April 18, 2018, the borrowing base and available commitments were reaffirmed at $3.2 billion and $1.7 billion, respectively. There were no borrowings outstanding under our revolving credit facility as of June 30, 2018.

On July 2, 2018, we closed on the sale of our oil and gas properties in the Haynesville Shale for $30.0 million. We do not expect this divestiture to have an impact on our borrowing base or available commitments.

A decline in commodity prices could result in the future reduction of our borrowing base and related commitments under the revolving credit facility. Unless commodity prices decline significantly from current levels, we do not believe that any such reductions would have a significant impact on our ability to service our debt and fund our drilling program and related operations.

We strive to manage our debt at a level below the available credit line in order to maintain borrowing capacity. Our revolving credit facility includes a covenant limiting our total debt. We believe that, with the existing cash on hand, operating cash flow and availability under our revolving credit facility, we have the capacity to fund our spending plans.

At June 30, 2018, we were in compliance with all restrictive financial covenants for both the revolving credit facility and senior notes. See our Form 10-K/A for further discussion of our restrictive financial covenants.

In July 2018, we repaid $237.0 million of maturities associated with our 6.51% weighted-average senior notes.

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Cash Flows

Our cash flows from operating activities, investing activities and financing activities are as follows:

	Six Months Ended   June 30,
(In thousands)	2018			2017
Cash flows provided by operating activities	$	546,660		$	529,946
Cash flows provided by (used in) investing activities	196,692			(405,484		)
Cash flows used in financing activities	(482,405		)	(106,470		)
Net increase in cash and cash equivalents	$	260,947		$	17,992

Operating Activities.Operating cash flow fluctuations are substantially driven by commodity prices, changes in our production volumes and operating expenses. Prices for natural gas and crude oil have historically been volatile, primarily as a result of supply and demand for natural gas and crude oil, pipeline infrastructure constraints, basis differentials, inventory storage levels and seasonal influences. In addition, fluctuations in cash flow may result in an increase or decrease in our capital expenditures. We are unable to predict future commodity prices and, as a result, cannot provide any assurance about future levels of net cash provided by operating activities.

Our working capital is substantially influenced by the variables discussed above and fluctuates based on the timing and amount of borrowings and repayments under our revolving credit facility, repayments of debt, the timing of cash collections and payments on our trade accounts receivable and payable, respectively, repurchases of our securities and changes in the fair value of our commodity derivative activity. From time to time, our working capital will reflect a deficit, while at other times it will reflect a surplus. This fluctuation is not unusual. At June 30, 2018 and December 31, 2017, we had a working capital surplus of $396.7 million and $134.9 million, respectively.

Net cash provided by operating activities in the first six months of 2018increased by $16.7 million compared to the first six months of 2017. This increase was primarily due to favorable changes in working capital and other assets and liabilities and lower cash operating expenses, partially offset by lower operating revenues and cash payments on derivative settlements. The decrease in operating revenues was primarily due to a decrease in realized natural gas prices and lower equivalent production, partially offset by higher crude oil prices. Average realized natural gas prices decreased by 9% and crude oil prices increased 39%, respectively, for the first six months of 2018 compared to the first six months of 2017. Equivalent production was flat for the first six months of 2018 compared to the first six months of 2017 due to higher natural gas production in the Marcellus Shale, offset by lower crude oil production due to the Eagle Ford Shale divestiture in February 2018.

See “Results of Operations” for additional information relative to commodity price, production and operating expense fluctuations.

Investing Activities.Cash flows provided by investing activities increased by $602.2 million for the first six months of 2018 compared to the first six months of 2017. The increase was due to $645.4 millionhigher proceeds from the sale of assets primarily due to the divestiture of our Eagle Ford Shale assets in February 2018 and$6.1 millionlower capital expenditures. These increases were partially offset by $49.3 millionhigher capital contributions associated with our equity method investments.

Financing Activities.Cash flows used in financing activities increased by $375.9 million for the first six months of 2018 compared to the first six months of 2017. This increase was primarily due to $419.7 million of repurchases of our common stock in 2018 as compared to $68.3 million in 2017 and $22.1 million of higher dividend payments related to an increase in our dividend rate from $0.07 per share for the first six months of 2017 to $0.12 per share in the first six months of 2018.

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Capitalization

Information about our capitalization is as follows:

(In thousands)	June 30, 2018			December 31, 2017
Debt(1)	$	1,522,572		$	1,521,891
Stockholders' equity	2,154,174			2,523,905
Total capitalization	$	3,676,746		$	4,045,796
Debt to total capitalization	41		%	38		%
Cash and cash equivalents	$	740,994		$	480,047

(1) Includes $304.0 million of current portion of long-term debt at June 30, 2018 and December 31, 2017, respectively.

During the first six months of 2018, we repurchased 20.0 million shares of our common stock for $481.5 million. During the first six months of 2018 and 2017, we paid dividends of $54.7 million ($0.12 per share) and $32.6 million ($0.07 per share), respectively, on our common stock.

In January 2018, the Board of Directors approved an increase in the quarterly dividend on our common stock from $0.05 per share to $0.06 per share.

Capital and Exploration Expenditures

On an annual basis, we generally fund most of our capital expenditures, excluding any significant property acquisitions, with cash generated from operations, and if required, borrowings under our revolving credit facility. We budget these expenditures based on our projected cash flows for the year.

The following table presents major components of our capital and exploration expenditures:

	Six Months Ended   June 30,
(In thousands)	2018		2017
Capital expenditures
Drilling and facilities	$	313,900	$	310,308
Leasehold acquisitions	11,344		91,497
Pipeline and gathering	—		462
Other	4,667		5,022
	329,911		407,289
Exploration expenditures(1)	58,117		10,157
Total	$	388,028	$	417,446

(1) Exploration expenditures include $51.1 million and $2.8 million of exploratory dry hole expenditures for the first six months of 2018 and 2017, respectively.

For the full year of 2018, we plan to drill approximately 85 gross wells (85.0 net) and complete 95 gross wells (95.0 net). In 2018, our drilling program includes approximately $890.0 million in total capital expenditures compared to $757.2 million in 2017. See “Outlook” for additional information regarding the current year drilling program. We will continue to assess the natural gas and crude oil price environment along with our liquidity position and may increase or decrease our capital expenditures accordingly. 

Contractual Obligations

We have various contractual obligations in the normal course of our operations. There have been no material changes to our contractual obligations described under “Transportation and Gathering Agreements” and “Lease Commitments” as disclosed in Note 9 of the Notes to the Consolidated Financial Statements and the obligations described under “Contractual

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Obligations” in Item 7 “Management’s Discussion and Analysis of Financial Condition and Results of Operations” included in our Form 10-K/A.

Critical Accounting Policies and Estimates

Our discussion and analysis of our financial condition and results of operations are based upon our Condensed Consolidated Financial Statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses. See our Form 10-K/A for further discussion of our critical accounting policies.

Recently Adopted and Recently Issued Accounting Pronouncements

Refer to Note 1 of the Notes to the Condensed Consolidated Financial Statements, “Financial Statement Presentation,” for a discussion of new accounting pronouncements that affect us.

Results of Operations

Second Quarters of 2018 and 2017 Compared

We reported net income in the second quarter of 2018 of $42.4 million, or $0.09 per share, compared to net income of $21.5 million, or $0.05 per share, in the second quarter of 2017. The increase in net income was primarily due to lower operating expenses, partially offset by lower operating revenues.

Revenue, Price and Volume Variances

Our revenues vary from year to year as a result of changes in commodity prices and production volumes. Below is a discussion of revenue, price and volume variances.

	Three Months Ended June 30,					Variance
Revenue Variances (In thousands)	2018			2017		Amount			Percent
Natural gas	$	364,660		$	395,328	$	(30,668	)	(8	)%
Crude oil and condensate	—			44,625		(44,625		)	(100	)%
Gain (loss) on derivative instruments	(3,668		)	13,805		(17,473		)	(127	)%
Brokered natural gas	92,576			4,037		88,539			2,193	%
Other	(121		)	2,662		(2,783		)	(105	)%
	$	453,447		$	460,457	$	(7,010	)	(2	)%

	Three Months Ended June 30,				Variance					Increase (Decrease) (In thousands)
	2018		2017		Amount			Percent
Price Variances
Natural gas	$	2.11	$	2.38	$	(0.27	)	(11	)%	$	(45,424	)
Volume Variances
Natural gas (Bcf)	172.4		166.2		6.2			4	%	$	14,756
Total										$	(30,668	)

Natural Gas Revenues

The decrease in natural gas revenues of $30.7 million was due to lower natural gas prices partially offset by higher production. The increase in production was a result of an increase in our drilling and completion activities in Pennsylvania.

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Crude Oil and Condensate Revenues

The decrease in crude oil and condensate revenues of $44.6 million was due to lower crude oil production as a result of the sale of our Eagle Ford Shale assets in February 2018.

Impact of Derivative Instruments on Operating Revenues

	Three Months Ended   June 30,
(In thousands)	2018			2017
Cash received (paid) on settlement of derivative instruments
Gain (loss) on derivative instruments	$	5,819		$	1,204
Non-cash gain (loss) on derivative instruments
Gain (loss) on derivative instruments	(9,487		)	12,601
	$	(3,668	)	$	13,805

Brokered Natural Gas

	Three Months Ended June 30,				Variance
(In thousands)	2018		2017		Amount		Percent
Brokered natural gas sales	$	92,576	$	4,037
Brokered natural gas purchases		80,082		3,419
Brokered natural gas margin	$	12,494	$	618	$	11,876	1,922	%

The $11.9 millionincrease in brokered natural gas margin is a result of an increase in brokered activity. This increase was due to higher volumes associated with natural gas purchases that were required to satisfy certain sales obligations.

Operating and Other Expenses

	Three Months Ended June 30,						Variance
(In thousands)	2018			2017			Amount			Percent
Operating and Other Expenses
Direct operations	$	15,657		$	27,262		$	(11,605	)	(43	)%
Transportation and gathering	114,189			120,544			(6,355		)	(5	)%
Brokered natural gas	80,082			3,419			76,663			2,242	%
Taxes other than income	5,392			8,310			(2,918		)	(35	)%
Exploration	54,500			3,959			50,541			1,277	%
Depreciation, depletion and amortization	84,910			144,322			(59,412		)	(41	)%
Impairment of oil and gas properties and other assets	—			68,555			(68,555		)	(100	)%
General and administrative	21,228			23,957			(2,729		)	(11	)%
	$	375,958		$	400,328		$	(24,370	)	(6	)%
Loss on equity method investments	$	(4	)	$	(1,286	)	$	(1,282	)	(100	)%
Gain (loss) on sale of assets	544			(1,403		)	(1,947		)	(139	)%
Interest expense, net	23,328			20,619			2,709			13	%
Other (income) expense	118			(315		)	433			(137	)%
Income tax expense	12,152			15,609			(3,457		)	(22	)%

Total costs and expenses from operations decreased by $24.4 million, or 6%, in the second quarter of 2018 compared to the same period of 2017. The primary reasons for this fluctuation are as follows:

• Direct operations decreased $11.6 million largely due to the sale of our oil and gas properties in West Virginia in the third quarter of 2017 and Eagle Ford Shale assets in the first quarter of 2018.

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• Transportation and gathering decreased $6.4 million due to the sale of our oil and gas properties in West Virginia in the third quarter of 2017 and Eagle Ford Shale assets in the first quarter of 2018.

• Brokered natural gas increased $76.7 million. See the preceding table titled “Brokered Natural Gas” for further analysis.

• Taxes other than income decreased $2.9 million primarily due to $2.8 million lower production taxes and $1.8 million lower ad valorem taxes both resulting from the sale of our oil and gas properties in West Virginia in the third quarter of 2017 and Eagle Ford Shale assets in the first quarter of 2018. These decreases were partially offset by a $1.4 million increase in drilling impact fees as a result of an increase in drilling activity in Pennsylvania.

• Exploration increased $50.5 million due to an increase in exploratory dry hole costs of $51.1 million. The exploratory dry hole costs in 2018 relate to our activities in one of our exploratory areas and our decision to cease further activity in that area based on the results of those activities.

• Depreciation, depletion and amortization decreased $59.4 million, primarily due to lower DD&A of $52.2 million, lower amortization of unproved properties of $6.0 million and lower accretion of $1.2 million in the second quarter of 2018. DD&A decreased $49.9 million due to a lower DD&A rate of $0.45 per Mcfe for the second quarter of 2018 compared to $0.73 per Mcfe for the second quarter of 2017, primarily due to the sale of higher rate fields in Eagle Ford Shale and West Virginia and positive reserve revisions related to our year end reserve estimation process.

• Impairment of oil and gas properties decreased $68.6 million due to the impairment of oil and gas properties and related pipeline assets in West Virginia, Virginia and Ohio associated with the proposed sale of these properties in the second quarter of 2017.

• General and administrative decreased $2.7 million due to $4.4 million of lower stock-based compensation expense associated with certain of our market-based performance awards. The remaining changes in other general and administrative expenses were not individually significant.

Interest Expense, net

Interest expense, net increased $2.7 million due to $5.5 million higher interest expense related to uncertain tax positions partially offset by $2.2 million higher interest income.

Income Tax Expense

Income tax expense decreased $3.5 million due to a lower effective tax rate, partially offset by higher pre-tax income. The effective tax rates for the second quarter of 2018 and 2017 were 22.3% and 42.0%, respectively. The decrease in the effective tax rate is primarily due to the impact of the Tax Cuts and Jobs Act law changes that were effective January 1, 2018, as well as the impact of non-recurring discrete items recorded during the second quarter of 2018 as compared to the second quarter of 2017.

First Six Months of 2018 and 2017 Compared

We reported net income in the first six months of 2018 of $159.7 million, or $0.35 per share, compared to net income of $127.2 million, or $0.27 per share, in the first six months of 2017. The increase in net income was primarily due to lower operating expenses and income tax expense, partially offset by lower operating revenues and higher loss on sale of assets.

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Revenue, Price and Volume Variances

Our revenues vary from year to year as a result of changes in commodity prices and production volumes. Below is a discussion of revenue, price and volume variances.

	Six Months Ended June 30,				Variance
Revenue Variances (In thousands)	2018		2017		Amount			Percent
Natural gas	$	776,768	$	828,770	$	(52,002	)	(6	)%
Crude oil and condensate	48,722		87,616		(38,894		)	(44	)%
Gain (loss) on derivative instruments	1,909		47,190		(45,281		)	(96	)%
Brokered natural gas	97,526		8,732		88,794			1,017	%
Other	1,749		5,994		(4,245		)	(71	)%
	$	926,674	$	978,302	$	(51,628	)	(5	)%

	Six Months Ended June 30,				Variance					Increase (Decrease) (In thousands)
	2018		2017		Amount			Percent
Price Variances
Natural gas	$	2.30	$	2.51	$	(0.21	)	(8	)%	$	(69,572	)
Crude oil and condensate	$	64.68	$	45.29	$	19.39		43	%	14,593
Total										$	(54,979	)
Volume Variances
Natural gas (Bcf)	337.0		330.0		7.0			2	%	$	17,570
Crude oil and condensate (Mbbl)	754		1,935		(1,181		)	(61	)%	(53,487		)
Total										$	(35,917	)

Natural Gas Revenues

The decrease in natural gas revenues of $52.0 million was due to lower natural gas prices partially offset by an increase in production. The increase in production was a result of an increase in our drilling and completion activities in Pennsylvania.

Crude Oil and Condensate Revenues

The decrease in crude oil and condensate revenues of $38.9 million was primarily due to lower production partially offset by higher crude oil prices. The decrease in production was the result of the sale of our Eagle Ford Shale assets in February 2018.

Impact of Derivative Instruments on Operating Revenues

	Six Months Ended   June 30,
(In thousands)	2018			2017
Cash received (paid) on settlement of derivative instruments
Gain (loss) on derivative instruments	$	(20,312	)	$	(319	)
Non-cash gain (loss) on derivative instruments
Gain (loss) on derivative instruments	22,221			47,509
	$	1,909		$	47,190

Brokered Natural Gas

	Six Months Ended June 30,				Variance
(In thousands)	2018		2017		Amount		Percent
Brokered natural gas sales	$	97,526	$	8,732
Brokered natural gas purchases	$	85,032	$	7,465
Brokered natural gas margin	$	12,494	$	1,267	$	11,227	886	%

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The $11.2 millionincrease in brokered natural gas margin is a result of an increase in brokered activity. This increase was due to higher volumes associated with natural gas purchases that were required to satisfy certain sales obligations.

Operating and Other Expenses

	Six Months Ended June 30,						Variance
(In thousands)	2018			2017			Amount			Percent
Operating and Other Expenses
Direct operations	$	35,727		$	51,903		$	(16,176	)	(31	)%
Transportation and gathering	226,314			244,018			(17,704		)	(7	)%
Brokered natural gas	85,032			7,465			77,567			1,039	%
Taxes other than income	12,582			17,368			(4,786		)	(28	)%
Exploration	58,117			10,157			47,960			472	%
Depreciation, depletion and amortization	167,038			279,422			(112,384		)	(40	)%
Impairment of oil and gas properties and other assets	—			68,555			(68,555		)	100	%
General and administrative	45,288			47,659			(2,371		)	(5	)%
	$	630,098		$	726,547		$	(96,449	)	(13	)%
Loss on equity method investments	$	(998	)	$	(2,569	)	$	(1,571	)	(61	)%
Gain (loss) on sale of assets	(40,505		)	(1,626		)	38,879			2,391	%
Interest expense, net	43,386			41,390			1,996			5	%
Other (income) expense	232			109			123			113	%
Income tax expense	51,793			78,814			(27,021		)	(34	)%

Total costs and expenses from operations decreased by $96.4 million, or 13%, in the first six months of 2018 compared to the same period of 2017. The primary reasons for this fluctuation are as follows:

• Direct operations decreased $16.2 million largely due to the sale of our oil and gas properties in West Virginia in the third quarter of 2017 and the Eagle Ford Shale assets in the first quarter of 2018.

• Transportation and gathering decreased $17.7 million largely due to the sale of our oil and gas properties in West Virginia in the third quarter of 2017 and the Eagle Ford Shale assets in the first quarter of 2018.

• Brokered natural gas increased $77.6 million. See the preceding table titled “Brokered Natural Gas” for further analysis.

• Taxes other than income decreased $4.8 million primarily due to $2.8 million lower production taxes and $4.4 million lower ad valorem taxes both resulting from the sale of our oil and gas properties in West Virginia in the third quarter of 2017 and Eagle Ford Shale assets in the first quarter of 2018. These decreases were partially offset by a $2.2 million increase in drilling impact fees as a result of an increase in drilling activity in Pennsylvania.

• Exploration increased $48.0 million due to an increase in exploratory dry hole costs of $51.1 million. The exploratory dry hole costs in 2018 relate to our activities in one of our exploratory areas and our decision to cease further activity in that area based on the results of those activities.

• Depreciation, depletion and amortization decreased $112.4 million primarily due to lower DD&A of $101.3 million, lower amortization of unproved properties of $8.7 million and lower accretion of $2.4 million. The decrease in DD&A was primarily due to a decrease of $98.0 million related to a lower DD&A rate of $0.44 per Mcfe for the first six months of 2018 compared to $0.73 per Mcfe for the first six months of 2017. The lower DD&A rate was due to the cessation of DD&A related to the sale of our higher rate Eagle Ford Shale assets that were classified as held for sale in the fourth quarter of 2017 and positive reserve revisions related to our year end reserve estimation process.

• Impairment of oil and gas properties decreased $68.6 million due to the impairment of oil and gas properties and related pipeline assets in West Virginia, Virginia and Ohio associated with the proposed sale of these properties in the second quarter of 2017.

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• General and administrative decreased $2.4 million primarily due to lower stock-based compensation cost of $7.2 million associated with certain of our market-based performance awards offset by $3.0 million higher employee costs and professional services. The remaining differences were not individually significant.

Loss on Sale of Assets

Loss on sale of assets increased $38.9 million due to the sale of our Eagle Ford Shale assets in the first quarter of 2018.

Interest Expense, net

Interest expense, net increased$2.0 million due to $5.5 million higher interest expense related to uncertain tax positions partially offset by $3.1 million higher interest income.

Income Tax Expense

Income tax expense decreased $27.0 million due to a lower effective tax rate, partially offset by slightly higher pre-tax income. The effective tax rates for the first six months of 2018 and 2017 were 24.5% and 38.2%, respectively. The decrease in the effective tax rate is primarily due to the impact of the Tax Cuts and Jobs Act law changes that were effective January 1, 2018, partially offset by an increase in the blended state statutory tax rate as a result of changes in our state apportionment factors due to the Eagle Ford Shale asset divestiture in February 2018.

Forward-Looking Information

The statements regarding future financial and operating performance and results, strategic pursuits and goals, market prices, future hedging and risk management activities, and other statements that are not historical facts contained in this report are forward-looking statements. The words “expect,” “project,” “estimate,” “believe,” “anticipate,” “intend,” “budget,” “plan,” “forecast,” “target,” “predict,” “may,” “should,” “could,” “will” and similar expressions are also intended to identify forward-looking statements. Such statements involve risks and uncertainties, including, but not limited to, market factors, market prices (including geographic basis differentials) of natural gas and crude oil, results of future drilling and marketing activity, future production and costs, legislative and regulatory initiatives, electronic, cyber or physical security breaches and other factors detailed herein and in our other Securities and Exchange Commission filings. See “Risk Factors” in Item 1A of the        Form 10-K/A for additional information about these risks and uncertainties. Should one or more of these risks or uncertainties materialize, or should underlying assumptions prove incorrect, actual outcomes may vary materially from those indicated.

ITEM 3.    Quantitative and Qualitative Disclosures about Market Risk

Market Risk

Our primary market risk is exposure to natural gas and crude oil prices. Realized prices are mainly driven by worldwide prices for crude oil and spot market prices for North American natural gas production. Commodity prices can be volatile and unpredictable.

Derivative Instruments and Risk Management Activities

Our risk management strategy is designed to reduce the risk of price volatility for our production in the natural gas and crude oil markets through the use of commodity derivatives. A committee that consists of members of senior management oversees our risk management activities. Our commodity derivatives generally cover a portion of our production and provide only partial price protection by limiting the benefit to us of increases in prices, while protecting us in the event of price declines. Further, if any of our counterparties defaulted, this protection might be limited as we might not receive the full benefit of our commodity derivatives. Please read the discussion below as well as Note 6 of the Notes to the Consolidated Financial Statements in our Form 10-K/A for a more detailed discussion of our derivative and risk management activities.

Periodically, we enter into commodity derivatives including collar, swap and basis swap agreements, to protect against exposure to price declines related to our natural gas and crude oil production. Our credit agreement restricts our ability to enter into commodity derivatives other than to hedge or mitigate risks to which we have actual or projected exposure or as permitted under our risk management policies and not subjecting us to material speculative risks. All of our derivatives are used for risk management purposes and are not held for trading purposes. Under the collar agreements, if the index price rises above the ceiling price, we pay the counterparty. If the index price falls below the floor price, the counterparty pays us. Under the swap agreements, we receive a fixed price on a notional quantity of natural gas or crude oil in exchange for paying a variable price based on a market-based index, such as the NYMEX gas and crude oil futures.

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As of June 30, 2018, we had the following outstanding financial commodity derivatives:

				Swaps		Basis Swaps			Estimated  Fair Value  Asset (Liability) (In thousands)
Type of Contract	Volume		Contract Period	Weighted-Average		Weighted- Average
Natural gas (Leidy)	17.9	Bcf	Jul. 2018 - Dec. 2018			$	(0.69	)	$	(408	)
Natural gas (Transco)	16.0	Bcf	Jul. 2018 - Dec. 2019			$	0.42		3,904
Natural gas (NYMEX)	46.5	Bcf	Jul. 2018 - Dec. 2018	$	2.93				(5,365		)
Natural gas (NYMEX)	6.0	Bcf	Jul. 2018 - Oct. 2018	$	3.10				496
									$	(1,373	)

As of June 30, 2018, we had the following outstanding physical commodity derivatives:

Type of Contract	Volume		Contract Period	Weighted-Average Fixed Price		Estimated  Fair Value  Asset (Liability) (In thousands)
Natural gas purchase	6.0	Bcf	Jul. 2018 - Oct. 2018	$	3.67	$	(4,827	)
						$	(4,827	)

In the above tables, natural gas prices are stated per Mcf.

The amounts set forth in the tables above represent our total unrealized derivative position at June 30, 2018 and exclude the impact of non-performance risk. Non-performance risk is considered in the fair value of our derivative instruments that are recorded in our Condensed Consolidated Financial Statements and is primarily evaluated by reviewing credit default swap spreads for the various financial institutions with which we have derivative contracts, while our non-performance risk is evaluated using a market credit spread provided by one of our banks.

During the first six months of 2018, natural gas basis swaps covered 21.4 Bcf, or 6%, of natural gas production at an average price of $2.56 per Mcf. Natural gas swaps covered 45.2 Bcf, or 13%, of natural gas production at an average price of$2.95 per Mcf. Crude oil collars with floor prices of $55.00 per Bbl and ceiling prices ranging from $63.35 to $63.80 per Bbl covered 0.2 Mmbbl, or 33%, of crude oil production at an average price of $63.62 per Bbl.

In January 2018, as a result of the pending sale of our Eagle Ford Shale assets, we terminated all of our outstanding crude oil financial derivatives for $0.3 million.

We are exposed to market risk on commodity derivative instruments to the extent of changes in market prices of natural gas and crude oil. However, the market risk exposure on these derivative contracts is generally offset by the gain or loss recognized upon the ultimate sale of the commodity. Although notional contract amounts are used to express the volume of natural gas agreements, the amounts that can be subject to credit risk in the event of non-performance by third parties are substantially smaller. Our counterparties are primarily commercial banks and financial service institutions that management believes present minimal credit risk and our derivative contracts are with multiple counterparties to minimize our exposure to any individual counterparty. We perform both quantitative and qualitative assessments of these counterparties based on their credit ratings and credit default swap rates where applicable. We have not incurred any losses related to non-performance risk of our counterparties and we do not anticipate any material impact on our financial results due to non-performance by third parties. However, we cannot be certain that we will not experience such losses in the future.

The preceding paragraphs contain forward-looking information concerning future production and projected gains and losses, which may be impacted both by production and by changes in the future commodity prices. See “Forward-Looking Information” for further details.

Fair Value of Other Financial Instruments

The estimated fair value of other financial instruments is the amount at which the instrument could be exchanged currently between willing parties. The carrying amount reported in the Condensed Consolidated Balance Sheet for cash and cash equivalents approximates fair value due to the short-term maturities of these instruments.

We use available market data and valuation methodologies to estimate the fair value of debt. The fair value of debt is the estimated amount we would have to pay a third party to assume the debt, including a credit spread for the difference between the issue rate and the period end market rate. The credit spread is our default or repayment risk. The credit spread (premium or

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discount) is determined by comparing our senior notes and revolving credit facility to new issuances (secured and unsecured) and secondary trades of similar size and credit statistics for both public and private debt. The fair value of all senior notes and the revolving credit facility is based on interest rates currently available to us.

The carrying amount and fair value of debt is as follows:

	June 30, 2018						December 31, 2017
(In thousands)	Carrying Amount			Estimated Fair Value			Carrying Amount			Estimated Fair Value
Long-term debt	$	1,522,572		$	1,486,210		$	1,521,891		$	1,527,624
Current maturities	(304,000		)	(305,966		)	(304,000		)	(312,055		)
Long-term debt, excluding current maturities	$	1,218,572		$	1,180,244		$	1,217,891		$	1,215,569

ITEM 4.    Controls and Procedures

As of June 30, 2018, the Company carried out an evaluation, under the supervision and with the participation of the Company's management, including the Company's Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of the Company's disclosure controls and procedures pursuant to Rules 13a-15 and 15d-15 of the Securities Exchange Act of 1934 (the “Exchange Act”). Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that the Company's disclosure controls and procedures are effective, in all material respects, with respect to the recording, processing, summarizing and reporting, within the time periods specified in the Commission’s rules and forms, of information required to be disclosed by the Company in the reports that it files or submits under the Exchange Act.

On January 1, 2018, the Company implemented a new Enterprise Resource Planning (ERP) system designed to upgrade our technology and improve our financial and operational information. The Company has modified its existing internal controls related to the ERP system implementation. While the Company believes that this new system and related changes to internal controls will ultimately strengthen its internal control over financial reporting, there are inherent risks in implementing a new ERP system and the Company will continue to evaluate and test these control changes in order to provide certification as of its fiscal year ending December 31, 2018 on the effectiveness, in all material respects, of its internal control over financial reporting.

With the exception of the ERP implementation described above, there were no changes in the Company's internal control over financial reporting that occurred during the second quarter of 2018 that have materially affected, or are reasonably likely to materially effect, the Company's internal control over financial reporting.

PART II. OTHER INFORMATION

ITEM 1.      Legal Proceedings

Legal Matters

The information set forth under the heading “Legal Matters” in Note 8 of the Notes to Condensed Consolidated Financial Statements included in Item 1 of Part I of this quarterly report is incorporated by reference in response to this item.

Environmental Matters

From time to time we receive notices of violation from governmental and regulatory authorities in areas in which we operate relating to alleged violations of environmental statutes or the rules and regulations promulgated thereunder. While we cannot predict with certainty whether these notices of violation will result in fines and/or penalties, if fines and/or penalties are imposed, they may result in monetary sanctions, individually or in the aggregate, in excess of $100,000.

ITEM 1A.    Risk Factors

For additional information about the risk factors that affect us, see Item 1A of Part I of our Annual Report on Form 10-K/A for the year ended December 31, 2017.

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ITEM 2.     Unregistered Sales of Equity Securities and Use of Proceeds

Issuer Purchases of Equity Securities

Our Board of Directors has authorized a share repurchase program under which we may purchase shares of common stock in the open market or in negotiated transactions. In February 2018, the Board of Directors authorized an increase of 25.0 million shares to our share repurchase program. There is no expiration date associated with the authorization. The shares included in the table below were purchased on the open market and were held as treasury stock as of June 30, 2018.

Period	Total Number of Shares Purchased	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Maximum Number of Shares That May Yet Be Purchased Under the Plans or Programs
April 2018 (1)	1,645,998	$	23.40	1,645,998	20,080,295
May 2018	—	—		—	20,080,295
June 2018 (2)	10,000,000	$	23.56	10,000,000	10,080,295
Total	11,645,998			11,645,998

⁽¹⁾ Shares were repurchased under a Rule 10b5-1 Plan that was in effect from April 1, 2018 to April 26, 2018.

⁽²⁾ Includes 2.6 million shares that were repurchased prior to June 30, 2018 and settled in July 2018.

ITEM 6.    Exhibits

Exhibit Number	Description
31.1	302 Certification — Chairman, President and Chief Executive Officer.
31.2	302 Certification — Executive Vice President and Chief Financial Officer.
32.1	906 Certification.
101.INS	XBRL Instance Document.
101.SCH	XBRL Taxonomy Extension Schema Document.
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document.
101.LAB	XBRL Taxonomy Extension Label Linkbase Document.
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document.

30

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	CABOT OIL & GAS CORPORATION
	(Registrant)
July 27, 2018	By:	/s/ DAN O. DINGES
		Dan O. Dinges
		Chairman, President and Chief Executive Officer
		(Principal Executive Officer)
July 27, 2018	By:	/s/ SCOTT C. SCHROEDER
		Scott C. Schroeder
		Executive Vice President and Chief Financial Officer
		(Principal Financial Officer)
July 27, 2018	By:	/s/ TODD M. ROEMER
		Todd M. Roemer
		Vice President and Controller
		(Principal Accounting Officer)

31

EX-31.1

EXHIBIT 31.1

I, Dan O. Dinges, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Cabot Oil & Gas Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: July 27, 2018

/s/ DAN O. DINGES

Dan O. Dinges

Chairman, President and Chief Executive Officer

EX-31.2

EXHIBIT 31.2

I, Scott C. Schroeder, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Cabot Oil & Gas Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: July 27, 2018

/s/ SCOTT C. SCHROEDER

Scott C. Schroeder

Executive Vice President and Chief Financial Officer

EX-32.1

EXHIBIT 32.1

Certification Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

(Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code)

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code) (the “Act”), each of the undersigned, Dan O. Dinges, Chief Executive Officer of Cabot Oil & Gas Corporation, a Delaware corporation (the “Company”), and Scott C. Schroeder, Chief Financial Officer of the Company, hereby certify that, to his knowledge:

(1) the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2018 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: July 27, 2018

/s/ DAN O. DINGES

Dan O. Dinges

Chief Executive Officer

/s/ SCOTT C. SCHROEDER

Scott C. Schroeder

Chief Financial Officer

XML

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Jul. 25, 2018
Document and Entity Information
Entity Registrant Name	CABOT OIL & GAS CORP
Entity Central Index Key	0000858470
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		441,177,384
Entity Current Reporting Status	Yes

XML

CONDENSED CONSOLIDATED BALANCE SHEET (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 740,994	$ 480,047
Accounts receivable, net	180,545	216,004
Income taxes receivable	41,512	56,666
Inventories	20,470	8,006
Current assets held for sale	0	1,440
Other current assets	3,892	2,794
Total current assets	987,413	764,957
Properties and equipment, net (Successful efforts method)	3,225,493	3,072,204
Equity method investments	147,984	86,077
Assets held for sale	6,828	778,855
Derivative instruments	3,412	2,239
Other assets	25,580	23,012
TOTAL ASSETS	4,396,710	4,727,344
Current liabilities
Accounts payable	235,978	238,045
Current portion of long-term debt	304,000	304,000
Accrued liabilities	13,817	27,441
Interest payable	27,360	27,575
Derivative instruments	9,589	30,637
Current liabilities held for sale	0	2,352
Total current liabilities	590,744	630,050
Long-term debt, net	1,218,572	1,217,891
Deferred income taxes	293,927	227,030
Asset retirement obligations	46,527	43,601
Liabilities held for sale	1,867	15,748
Postretirement benefits	30,351	29,396
Other liabilities	60,548	39,723
Total liabilities	2,242,536	2,203,439
Commitments and contingencies
Stockholders' equity
Common stock: Authorized - 960,000,000 shares of $0.10 par value in 2017 and 2016 Issued - 475,443,335 shares and 475,042,692 shares in 2017 and 2016, respectively	47,609	47,555
Additional paid-in capital	1,749,437	1,742,419
Retained earnings	1,266,928	1,162,430
Accumulated other comprehensive income (loss)	2,248	2,077
Less treasury stock, at cost: 12,935,926 and 9,892,680 shares in 2017 and 2016, respectively	(912,048)	(430,576)
Total stockholders' equity	2,154,174	2,523,905
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 4,396,710	$ 4,727,344

XML

CONDENSED CONSOLIDATED BALANCE SHEET (Unaudited) (Parenthetical) - $ / shares	Jun. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Common stock, authorized (shares)	960,000,000	960,000,000
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, issued (shares)	476,086,079	475,547,419
Treasury stock (shares)	34,909,705	14,935,926

XML

CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
OPERATING REVENUES
Operating revenues	$ 457,115	$ 446,652	$ 924,765	$ 931,112
Gain (loss) on derivative instruments	(3,668)	13,805	1,909	47,190
TOTAL OPERATING REVENUES	453,447	460,457	926,674	978,302
OPERATING EXPENSES
Direct operations	15,657	27,262	35,727	51,903
Taxes other than income	5,392	8,310	12,582	17,368
Exploration	54,500	3,959	58,117	10,157
Depreciation, depletion and amortization	84,910	144,322	167,038	279,422
Impairment of oil and gas properties and other assets	0	68,555	0	68,555
General and administrative	21,228	23,957	45,288	47,659
TOTAL OPERATING EXPENSES	375,958	400,328	630,098	726,547
Loss on equity method investments	(4)	(1,286)	(998)	(2,569)
Gain (loss) on sale of assets	544	(1,403)	(40,505)	(1,626)
INCOME FROM OPERATIONS	78,029	57,440	255,073	247,560
Interest expense, net	23,328	20,619	43,386	41,390
Other (income) expense	118	(315)	232	109
Income before income taxes	54,583	37,136	211,455	206,061
Income tax expense	12,152	15,609	51,793	78,814
NET INCOME	$ 42,431	$ 21,527	$ 159,662	$ 127,247
Earnings per share
Basic (in dollars per share)	$ 0.09	$ 0.05	$ 0.35	$ 0.27
Diluted (in dollars per share)	$ 0.09	$ 0.05	$ 0.35	$ 0.27
Weighted-average common shares outstanding
Basic (in shares)	451,055	464,768	455,361	465,057
Diluted (in shares)	453,114	466,745	457,142	466,752
Dividends per common share (in dollars per share)	$ 0.06	$ 0.05	$ 0.12	$ 0.07
Natural gas
OPERATING REVENUES
Operating revenues	$ 364,660	$ 395,328	$ 776,768	$ 828,770
Crude oil and condensate
OPERATING REVENUES
Operating revenues	0	44,625	48,722	87,616
Brokered natural gas
OPERATING REVENUES
Operating revenues	92,576	4,037	97,526	8,732
OPERATING EXPENSES
Operating expenses	80,082	3,419	85,032	7,465
Other
OPERATING REVENUES
Operating revenues	(121)	2,662	1,749	5,994
Transportation and gathering
OPERATING EXPENSES
Operating expenses	$ 114,189	$ 120,544	$ 226,314	$ 244,018

XML

CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 159,662	$ 127,247
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation, depletion and amortization	167,038	279,422
Impairment of oil and gas properties and other assets	0	68,555
Deferred income tax expense	66,976	73,394
Loss on sale of assets	40,505	1,626
Exploratory dry hole cost	51,085	2,842
Gain on derivative instruments	(1,909)	(47,190)
Net cash paid in settlement of derivative instruments	(20,312)	(319)
Loss on equity method investments	998	2,569
Amortization of debt issuance costs	2,390	2,384
Stock-based compensation and other	10,364	18,198
Changes in assets and liabilities:
Accounts receivable, net	38,939	13,713
Income taxes	12,107	(6,166)
Inventories	(12,377)	(4)
Other current assets	(1,096)	(1,776)
Accounts payable and accrued liabilities	7,168	(4,339)
Interest payable	(215)	(311)
Other assets and liabilities	25,337	101
Net cash provided by operating activities	546,660	529,946
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(387,271)	(393,333)
Proceeds from sale of assets	646,868	1,475
Investment in equity method investments	(62,905)	(13,626)
Net cash provided by (used in) investing activities	196,692	(405,484)
CASH FLOWS FROM FINANCING ACTIVITIES
Treasury stock repurchases	(419,654)	(68,255)
Dividends paid	(54,718)	(32,582)
Tax withholdings on vesting of stock awards	(8,033)	(5,672)
Other	0	39
Net cash used in financing activities	(482,405)	(106,470)
Net increase in cash and cash equivalents	260,947	17,992
Cash and cash equivalents, beginning of period	480,047	498,542
Cash and cash equivalents, end of period	$ 740,994	$ 516,534

XML

Financial Statement Presentation

6 Months Ended

Jun. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Financial Statement Presentation

Financial Statement Presentation

During interim periods, Cabot Oil & Gas Corporation (the Company) follows the same accounting policies disclosed in its Annual Report on Form 10-K/A for the year ended December 31, 2017 (Form 10-K/A) filed with the Securities and Exchange Commission (SEC). The interim financial statements should be read in conjunction with the notes to the consolidated financial statements and information presented in the Form 10-K/A. In management’s opinion, the accompanying interim condensed consolidated financial statements contain all material adjustments, consisting only of normal recurring adjustments, necessary for a fair statement. The results for any interim period are not necessarily indicative of the expected results for the entire year.

Certain reclassifications have been made to prior year statements to conform with the current year presentation. These reclassifications had no impact on previously reported stockholders' equity, net income or cash flows.

Recently Adopted Accounting Pronouncements

Revenue Recognition. In May 2014, the Financial Accounting Standards Boards (FASB) issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606) (Accounting Standards Codification (ASC) 606, as subsequently amended). ASC 606 supersedes the revenue recognition requirements in Topic 605 Revenue Recognition (ASC 605), and requires entities to recognize revenue when control of the promised goods or services is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The Company adopted ASC 606 as of January 1, 2018 using the modified retrospective transition method.

The adoption of ASC 606 also included the adoption and modification of other guidance, particularly the creation of ASC 340-40 on costs to obtain or fulfill contracts with customers and ASC 610-20 on gains or losses on derecognition of nonfinancial assets. ASC 340-40 provides additional capitalization, amortization and impairment guidance for certain costs associated with obtaining or fulfilling contracts subject to ASC 606. ASC 610-20 provides guidance on the measurement and recognition of gains and losses for disposals of assets that are not the outputs of ordinary activities, such as sales of fixed assets, when they are not businesses or deconsolidation of subsidiaries. The guidance in ASC 610-20 largely aligns with the guidance in ASC 606. It also supersedes most guidance on real estate sales that was contained in ASC 360-20; however, it does not apply to conveyances of oil and gas interests, which continue to be governed by guidance in ASC 932 for oil and gas extractive activities.

There was no material effect from the adoption of ASC 340-40 or ASC 610-20 separate from those discussed from the adoption of ASC 606.

Financial Instruments. In January 2016, the FASB issued ASU 2016-01, Financial Instruments - Overall, as an amendment to ASC Subtopic 825-10. The amendments in this update address certain aspects of recognition, measurement, presentation and disclosure of financial instruments. Among other items, this update will simplify the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment. When a qualitative assessment indicates that impairment exists, an entity is required to measure the investment at fair value. This impairment assessment reduces the complexity of the other-than-temporary impairment guidance that entities follow currently. The Company adopted ASU 2016-01 as of January 1, 2018. The adoption of this guidance did not have a material effect on the Company's financial position, results of operation or cash flows.

Statement of Cash Flows.In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230), which is intended to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. The guidance addresses eight specific cash flow issues for which current accounting guidance is either unclear or does not include specific guidance. The Company adopted this guidance effective January 1, 2018. In conjunction with the adoption, the Company made an accounting policy election to classify distributions it receives from its equity method investees based on the nature of distributions approach in which distributions received are classified on the basis of the nature of the activity that generated the distribution as either a return on investment (cash inflows from operating activities) or a return of investment (cash inflows from investing activities). The adoption of this guidance did not have a material effect on the Company's financial position, results of operation or cash flows.

Recently Issued Accounting Pronouncements

Leases. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). The new lease guidance supersedes Topic 840. The core principle of the guidance is that entities should recognize the assets and liabilities that arise from leases. This ASU does not apply to leases to explore for or use minerals, oil, natural gas and similar nonregenerative resources, including the intangible right to explore for those natural resources and rights to use the land in which those natural resources are contained. The guidance is effective for interim and annual periods beginning after December 15, 2018. This ASU is to be adopted using a modified retrospective approach. The Company plans to adopt this guidance effective January 1, 2019 and is currently evaluating the effect that adopting this guidance will have on its financial position, results of operations or cash flows.

Additionally, in January 2018, the FASB issued ASU No. 2018-01, Leases (Topic 842): Practical Expedient for Transition. The amendments in this update provide an optional transition to not evaluate existing or expired land easements that were not previously accounted for under current leases guidance in Topic 840. An entity that elects this practical expedient should evaluate new or modified land easements beginning at the date of adoption. An entity that does not elect this practical expedient should evaluate all existing or expired land easements in connection with the adoption of the new lease requirements in Topic 842 to assess whether they meet the definition of a lease. The Company is currently evaluating this guidance to determine whether or not to make use of this practical expedient.

Revenue Recognition

On January 1, 2018, the Company adopted ASC 606, Revenue from Contracts with Customers, and the related guidance in ASC 340-40 (the new revenue standard), and related guidance on gains and losses on derecognition of nonfinancial assets ASC 610-20, using the modified retrospective method applied to those contracts which were not completed as of January 1, 2018. Under the modified retrospective method, the Company recognizes the cumulative effect of initially applying the new revenue standard as an adjustment to the opening balance of retained earnings; however, no significant adjustment was required as a result of adopting the new revenue standard. Results for reporting periods beginning after January 1, 2018 are presented under the new revenue standard. The comparative information has not been restated and continues to be reported under the historic accounting standards in effect for those periods. The impact of the adoption of the new revenue standard is expected to be immaterial to the Company’s net income on an ongoing basis.

The Company’s revenue is typically generated from contracts to sell natural gas, crude oil or NGLs produced from interests in oil and gas properties owned by the Company. These contracts generally require the Company to deliver a specific amount of a commodity per day for a specified number of days at a price that is either fixed or variable. The contracts specify a delivery point which represents the point at which control of the product is transferred to the customer. These contracts frequently meet the definition of a derivative under ASC 815, and are accounted for as derivatives unless the Company elects to treat them as normal sales as permitted under that guidance. The Company typically elects to treat contracts to sell oil and gas production as normal sales, which are then accounted for as contracts with customers. The Company has determined that these contracts represent multiple performance obligations which are satisfied when control of the commodity transfers to the customer, typically through the delivery of the specified commodity to a designated delivery point.

Revenue is measured based on consideration specified in the contract with the customer, and excludes any amounts collected on behalf of third parties. The Company recognizes revenue in the amount that reflects the consideration it expects to be entitled to in exchange for transferring control of those goods to the customer. The contract consideration in the Company’s variable price contracts are typically allocated to specific performance obligations in the contract according to the price stated in the contract. Amounts allocated in the Company’s fixed price contracts are based on the standalone selling price of those products in the context of long-term, fixed price contracts, which generally approximates the contract price. Payment is generally received one or two months after the sale has occurred.

Gain or loss on derivative instruments is outside the scope of ASC 606 and is not considered revenue from contracts with customers subject to ASC 606. The Company may use financial or physical contracts accounted for as derivatives as economic hedges to manage price risk associated with normal sales, or in limited cases may use them for contracts the Company intends to physically settle but do not meet all of the criteria to be treated as normal sales.

Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, and that are collected by the Company from a customer, are excluded from revenue.

Producer Gas Imbalances. The Company applies the sales method of accounting for natural gas revenue. Under this method, revenues are recognized based on the actual volume of natural gas sold to purchasers. Natural gas production operations may include joint owners who take more or less than the production volumes entitled to them on certain properties. Production volume is monitored to minimize these natural gas imbalances. Under this method, a natural gas imbalance liability is recorded if the Company's excess takes of natural gas exceed its estimated remaining proved developed reserves for these properties at the actual price realized upon the gas sale. A receivable is recognized only to the extent an imbalance cannot be recouped from the reserves in the underlying properties. The Company’s aggregate imbalance positions at June 30, 2018 and December 31, 2017 were not material.

Brokered Natural Gas. Revenues and expenses related to brokered natural gas are reported gross as part of operating revenues and operating expenses in accordance with applicable accounting standards. The Company buys and sells natural gas utilizing separate purchase and sale transactions whereby the Company or the counterparty obtains control of the natural gas purchased or sold.

Disaggregation of Revenue. The following table presents revenues disaggregated by product:

	Three Months Ended June 30,					Six Months Ended June 30,
(In thousands)	2018			2017(1)		2018		2017(1)
OPERATING REVENUES
Natural gas	$	364,660		$	395,328	$	776,768	$	828,770
Crude oil and condensate	—			44,625		48,722		87,616
Brokered natural gas	92,576			4,037		97,526		8,732
Other	(121		)	2,662		1,749		5,994
Total revenues from contracts with customers	457,115			446,652		924,765		931,112
Gain (loss) on derivative instruments	(3,668		)	13,805		1,909		47,190
Total operating revenues	$	453,447		$	460,457	$	926,674	$	978,302

_______________________________________________________________________________

(1) As noted above, prior period amounts have not been adjusted under the modified retrospective method.

All of the Company’s revenues from contracts with customers represent products transferred at a point in time as control is transferred to the customer and are generated in the United States.

Transaction Price Allocated to Remaining Performance Obligations. A significant number of the Company’s product sales are short-term in nature with a contract term of one year or less. For those contracts, the Company has utilized the practical expedient exempting the Company from disclosure of the transaction price allocated to remaining performance obligations if the performance obligation is part of a contract that has an original expected duration of one year or less.

As of June 30, 2018, the Company has $8.6 billion of unsatisfied performance obligations related to natural gas sales that have a fixed pricing component and a contract term greater than one year. The Company expects to recognize these obligations over the next 20 years.

Contract Balances. Receivables from contracts with customers are recorded when the right to consideration becomes unconditional, generally when control of the product has been transferred to the customer. Receivables from contracts with customers were $175.4 million and $215.5 million as of June 30, 2018 and December 31, 2017, respectively, and are reported in accounts receivable, net on the Condensed Consolidated Balance Sheet. The Company currently has no assets or liabilities related to its revenue contracts, including no upfront or rights to deficiency payments.

Practical Expedients. The Company has made use of certain practical expedients in adopting the new revenue standard, including the value of unsatisfied performance obligations are not disclosed for (i) contracts with an original expected length of one year or less, (ii) contracts for which the Company recognizes revenue at the amount to which the Company has the right to invoice, (iii) variable consideration which is allocated entirely to a wholly unsatisfied performance obligation and meets the variable allocation criteria in the standard and (iv) only contracts that are not completed at transition.

The Company has not adjusted the promised amount of consideration for the effects of a significant financing component if the Company expects, at contract inception, that the period between when the Company transfers a promised good or service to the customer and when the customer pays for that good or service will be one year or less.

XML

Properties and Equipment, Net

6 Months Ended

Jun. 30, 2018

Property, Plant and Equipment [Abstract]

Properties and Equipment, Net

Properties and Equipment, Net

Properties and equipment, net are comprised of the following:

(In thousands)	June 30, 2018			December 31, 2017
Proved oil and gas properties	$	5,247,016		$	4,932,512
Unproved oil and gas properties	189,436			190,474
Gathering and pipeline systems	1,569			1,569
Land, building and other equipment	83,293			82,670
	5,521,314			5,207,225
Accumulated depreciation, depletion and amortization	(2,295,821		)	(2,135,021		)
	$	3,225,493		$	3,072,204

At June 30, 2018, the Company did not have any projects that had exploratory well costs capitalized for a period of greater than one year after drilling.

Divestitures

In February 2018, the Company sold its operated and non-operated Eagle Ford Shale assets for $765.0 million. During the fourth quarter of 2017, the Company classified these assets as held for sale and recorded an impairment charge of $414.3 million associated with the proposed sale of these properties. The Company recognized a loss on sale of oil and gas properties of $44.2 million.

Subsequent Event. In July 2018, the Company closed on the sale of its oil and gas properties in the Haynesville Shale for $30.0 million. The sales price included a $5.0 million deposit that was received in the fourth quarter of 2017. Beginning with the fourth quarter of 2017, the Company classified these assets as held for sale.

XML

Equity Method Investments

6 Months Ended

Jun. 30, 2018

Equity Method Investments and Joint Ventures [Abstract]

Equity Method Investments

Equity Method Investments

The Company holds a 25% equity interest in Constitution Pipeline Company, LLC (Constitution) and a 20% equity interest in Meade Pipeline Co LLC (Meade). Activity related to these equity method investments is as follows:

	Constitution						Meade						Total
	Six Months Ended June 30,
(In thousands)	2018			2017			2018			2017			2018			2017
Balance at beginning of period	$	732		$	96,850		$	85,345		$	32,674		$	86,077		$	129,524
Contributions	250			3,125			62,655			10,501			62,905			13,626
Loss on equity method investments	(982		)	(2,555		)	(16		)	(14		)	(998		)	(2,569		)
Balance at end of period	$	—		$	97,420		$	147,984		$	43,161		$	147,984		$	140,581

During 2018, the Company expects to contribute approximately $70.0 million to its equity method investments. For further information regarding the Company’s equity method investments, refer to Note 4 of the Notes to the Consolidated Financial Statements in the Form 10-K/A.

Constitution

As of June 30, 2018, the Company’s carrying value of its investment in Constitution is less than its proportionate share of Constitution’s net assets by $95.9 million. This basis difference is due to the Company’s impairment recorded in the fourth quarter of 2017 and relates entirely to the pipeline assets of Constitution. The Company expects to amortize this basis difference once the related assets of Constitution are placed in service, which may or may not occur, depending on the outcome of the legal and regulatory process related to certain permitting matters.

The Company remains committed to funding the project in an amount proportionate to its ownership interest for the development and construction of the new pipeline.

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Debt and Credit Agreements

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Debt and Credit Agreements

Debt and Credit Agreements

The Company’s debt and credit agreements consisted of the following:

(In thousands)	June 30, 2018			December 31, 2017
Total debt
6.51% weighted-average senior notes (1)	$	361,000		$	361,000
9.78% senior notes (2)	67,000			67,000
5.58% weighted-average senior notes	175,000			175,000
3.65% weighted-average senior notes	925,000			925,000
Revolving credit facility	—			—
Unamortized debt issuance costs	(5,428		)	(6,109		)
	$	1,522,572		$	1,521,891

_______________________________________________________________________________

(1) Includes $237.0 million of current portion of long-term debt at June 30, 2018 and December 31, 2017, respectively.

(2) Includes $67.0 million of current portion of long-term debt at June 30, 2018 and December 31, 2017, respectively.

The borrowing base under the terms of the Company's revolving credit facility is redetermined annually in April. In addition, either the Company or the banks may request an interim redetermination twice a year or in connection with certain acquisitions or divestitures of oil and gas properties. Effective April 18, 2018, the borrowing base and available commitments were reaffirmed at $3.2 billion and $1.7 billion, respectively. At June 30, 2018, the Company had no borrowings outstanding under its revolving credit facility and had unused commitments of $1.7 billion.

At June 30, 2018, the Company was in compliance with all restrictive financial covenants for both its revolving credit facility and senior notes.

Subsequent Event. In July 2018, the Company repaid $237.0 million of maturities associated with its 6.51% weighted-average senior notes.

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Derivative Instruments and Hedging Activities

6 Months Ended

Jun. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments and Hedging Activities

Derivative Instruments and Hedging Activities

As of June 30, 2018, the Company had the following outstanding financial commodity derivatives:

						Basis Swaps
				Swaps
Type of Contract	Volume		Contract Period	Weighted-Average		Weighted-Average
Natural gas (Leidy)	17.9	Bcf	Jul. 2018 - Dec. 2018			$	(0.69	)
Natural gas (Transco)	16.0	Bcf	Jul. 2018 - Dec. 2019			$	0.42
Natural gas (NYMEX)	46.5	Bcf	Jul. 2018 - Dec. 2018	$	2.93
Natural gas (NYMEX)	6.0	Bcf	Jul. 2018 - Oct. 2018	$	3.10

As of June 30, 2018, the Company had the following outstanding physical commodity derivatives:

Type of Contract	Volume		Contract Period	Weighted-Average Fixed Price
Natural gas purchase	6.0	Bcf	Jul. 2018 - Oct. 2018	$	3.67

In the tables above, natural gas prices are stated per Mcf.

Effect of Derivative Instruments on the Condensed Consolidated Balance Sheet

		Derivative Assets				Derivative Liabilities
(In thousands)	Balance Sheet Location	June 30, 2018		December 31, 2017		June 30, 2018		December 31, 2017
Commodity contracts	Derivative instruments (current)	$	—	$	—	$	9,589	$	30,637
Commodity contracts	Derivative instruments (non-current)	3,412		2,239		—		—
		$	3,412	$	2,239	$	9,589	$	30,637

Offsetting of Derivative Assets and Liabilities in the Condensed Consolidated Balance Sheet

(In thousands)	June 30, 2018			December 31, 2017
Derivative assets
Gross amounts of recognized assets	$	4,474		$	2,239
Gross amounts offset in the statement of financial position	(1,062		)	—
Net amounts of assets presented in the statement of financial position	3,412			2,239
Gross amounts of financial instruments not offset in the statement of financial position	—			—
Net amount	$	3,412		$	2,239
Derivative liabilities
Gross amounts of recognized liabilities	$	10,651		$	30,637
Gross amounts offset in the statement of financial position	(1,062		)	—
Net amounts of liabilities presented in the statement of financial position	9,589			30,637
Gross amounts of financial instruments not offset in the statement of financial position	—			241
Net amount	$	9,589		$	30,878

Effect of Derivative Instruments on the Condensed Consolidated Statement of Operations

	Three Months Ended   June 30,					Six Months Ended   June 30,
(In thousands)	2018			2017		2018			2017
Cash received (paid) on settlement of derivative instruments
Gain (loss) on derivative instruments	$	5,819		$	1,204	$	(20,312	)	$	(319	)
Non-cash gain (loss) on derivative instruments
Gain (loss) on derivative instruments	(9,487		)	12,601		22,221			47,509
	$	(3,668	)	$	13,805	$	1,909		$	47,190

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Fair Value Measurements

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

The Company follows the authoritative guidance for measuring fair value of assets and liabilities in its financial statements. For further information regarding the fair value hierarchy, refer to Note 1 of the Notes to the Consolidated Financial Statements in the Form 10-K/A.

Financial Assets and Liabilities

The following fair value hierarchy table presents information about the Company’s financial assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at    June 30, 2018
Assets
Deferred compensation plan	$	16,050	$	—	$	—	$	16,050
Derivative instruments	—		577		3,897		4,474
Total assets	$	16,050	$	577	$	3,897	$	20,524
Liabilities
Deferred compensation plan	$	27,849	$	—	$	—	$	27,849
Derivative instruments	—		5,415		5,236		10,651
Total liabilities	$	27,849	$	5,415	$	5,236	$	38,500

(In thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at    December 31, 2017
Assets
Deferred compensation plan	$	14,966	$	—	$	—	$	14,966
Derivative instruments	—		—		2,239		2,239
Total assets	$	14,966	$	—	$	2,239	$	17,205
Liabilities
Deferred compensation plan	$	29,145	$	—	$	—	$	29,145
Derivative instruments	—		—		30,637		30,637
Total liabilities	$	29,145	$	—	$	30,637	$	59,782

The Company’s investments associated with its deferred compensation plan consist of mutual funds and deferred shares of the Company’s common stock that are publicly traded and for which market prices are readily available.

The derivative instruments were measured based on quotes from the Company’s counterparties or internal models. Such quotes and models have been derived using an income approach that considers various inputs including current market and contractual prices for the underlying instruments, quoted forward prices for natural gas and crude oil, basis differentials and interest rates, such as a LIBOR curve for a similar length of time as the derivative contract term as applicable. Estimates are verified using relevant NYMEX futures contracts and/or are compared to multiple quotes obtained from counterparties for reasonableness. The determination of the fair values presented above also incorporates a credit adjustment for non-performance risk. The Company measured the non-performance risk of its counterparties by reviewing credit default swap spreads for the various financial institutions with which it has derivative transactions, while non-performance risk of the Company is evaluated using a market credit spread provided by the Company’s bank. The Company has not incurred any losses related to non-performance risk of its counterparties and does not anticipate any material impact on its financial results due to non-performance by third parties.

The most significant unobservable inputs relative to the Company’s Level 3 derivative contracts are basis differentials. An increase (decrease) in these unobservable inputs would result in an increase (decrease) in fair value, respectively. The Company does not have access to the specific assumptions used in its counterparties’ valuation models. Consequently, additional disclosures regarding significant Level 3 unobservable inputs were not provided.

The following table sets forth a reconciliation of changes in the fair value of financial assets and liabilities classified as Level 3 in the fair value hierarchy:

	Six Months Ended   June 30,
(In thousands)	2018			2017
Balance at beginning of period	$	(28,398	)	$	(15,868	)
Total gain (loss) included in earnings	9,019			30,758
Settlement (gain) loss	18,040			(3,537		)
Transfers in and/or out of level 3	—			—
Balance at end of period	$	(1,339	)	$	11,353
Change in unrealized gains (losses) relating to assets and liabilities still held at the end of the period	$	(1,276	)	$	17,915

There were no transfers between Level 1 and Level 2 fair value measurements for the six months ended June 30, 2018 and 2017.

Non-Financial Assets and Liabilities

The Company discloses or recognizes its non-financial assets and liabilities, such as impairments, at fair value on a nonrecurring basis. As none of the Company’s other non-financial assets and liabilities were measured at fair value as of June 30, 2018, additional disclosures were not required.

The estimated fair value of the Company’s asset retirement obligations at inception is determined by utilizing the income approach by applying a credit-adjusted risk-free rate, which takes into account the Company’s credit risk, the time value of money, and the current economic state to the undiscounted expected abandonment cash flows. Given the unobservable nature of the inputs, the measurement of the asset retirement obligations was classified as Level 3 in the fair value hierarchy.

Fair Value of Other Financial Instruments

The estimated fair value of other financial instruments is the amount at which the instrument could be exchanged currently between willing parties. The carrying amount reported in the Condensed Consolidated Balance Sheet for cash and cash equivalents approximates fair value due to the short-term maturities of these instruments. Cash and cash equivalents are classified as Level 1 in the fair value hierarchy and the remaining financial instruments are classified as Level 2.

The Company uses available market data and valuation methodologies to estimate the fair value of debt. The fair value of debt is the estimated amount the Company would have to pay a third party to assume the debt, including a credit spread for the difference between the issue rate and the period end market rate. The credit spread is the Company’s default or repayment risk. The credit spread (premium or discount) is determined by comparing the Company’s senior notes and revolving credit facility to new issuances (secured and unsecured) and secondary trades of similar size and credit statistics for both public and private debt. The fair value of all senior notes and the revolving credit facility is based on interest rates currently available to the Company. The Company’s debt is valued using an income approach and classified as Level 3 in the fair value hierarchy.

The carrying amount and fair value of debt is as follows:

	June 30, 2018						December 31, 2017
(In thousands)	Carrying Amount			Estimated Fair Value			Carrying Amount			Estimated Fair Value
Long-term debt	$	1,522,572		$	1,486,210		$	1,521,891		$	1,527,624
Current maturities	(304,000		)	(305,966		)	(304,000		)	(312,055		)
Long-term debt, excluding current maturities	$	1,218,572		$	1,180,244		$	1,217,891		$	1,215,569

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Asset Retirement Obligations

6 Months Ended

Jun. 30, 2018

Asset Retirement Obligation Disclosure [Abstract]

Asset Retirement Obligations

Asset Retirement Obligations

Activity related to the Company’s asset retirement obligations is as follows:

(In thousands)	Six Months Ended   June 30, 2018
Balance at beginning of period(1)	$	48,553
Liabilities incurred	2,322
Liabilities settled	(789		)
Liabilities divested	(3,782		)
Accretion expense	1,223
Balance at end of period(2)	$	47,527

_______________________________________________________________________________

(1) Includes $5.0 million of current asset retirement obligations included in accrued liabilities at December 31, 2017.

(2) Includes $1.0 million of current asset retirement obligations included in accrued liabilities at June 30, 2018.

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Contractual Obligations

The Company has various contractual obligations in the normal course of its operations. There have been no material changes to the Company’s contractual obligations described under “Transportation and Gathering Agreements” and "Lease Commitments” as disclosed in Note 9 of the Notes to Consolidated Financial Statements in the Form 10-K/A.

Legal Matters

The Company is a defendant in various legal proceedings arising in the normal course of business. All known liabilities are accrued when management determines they are probable based on its best estimate of the potential loss. While the outcome and impact of these legal proceedings on the Company cannot be predicted with certainty, management believes that the resolution of these proceedings will not have a material effect on the Company’s financial position, results of operations or cash flows.

Contingency Reserves. When deemed necessary, the Company establishes reserves for certain legal proceedings. The establishment of a reserve is based on an estimation process that includes the advice of legal counsel and subjective judgment of management. While management believes these reserves to be adequate, it is reasonably possible that the Company could incur additional losses with respect to those matters in which reserves have been established. The Company believes that any such amount above the amounts accrued would not be material to the Condensed Consolidated Financial Statements. Future changes in facts and circumstances not currently foreseeable could result in the actual liability exceeding the estimated ranges of loss and amounts accrued.

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Capital Stock

6 Months Ended

Jun. 30, 2018

Equity [Abstract]

Capital Stock

Capital Stock

Treasury Stock

In February 2018, the Board of Directors authorized an increase of 25.0 million shares to the Company’s share repurchase program. After this authorization, the total number of shares available for repurchase was 30.1 million shares. Under the share repurchase program, the Company may purchase shares of common stock in the open market or in negotiated transactions. The timing and amount of any stock purchases are determined at the discretion of management. The Company may use the repurchased shares to fund stock compensation programs currently in existence, or for other corporate purposes. All purchases executed to date have been through open market transactions. There is no expiration date associated with the authorization to repurchase common stock of the Company.

During the first six months of 2018, the Company repurchased 20.0 million shares for a total cost of $481.5 million. As of June 30, 2018, 10.1 million shares are available for repurchase under the share repurchase program.

No treasury shares have been delivered or sold by the Company subsequent to the repurchase. As of June 30, 2018, 34.9 million shares were held as treasury stock, which includes 2.6 million shares that were repurchased prior to June 30, 2018 and settled in July 2018.

Subsequent Event. In July 2018, the Board of Directors authorized an increase of 20.0 million shares to the Company’s share repurchase program. After this authorization, the total number of shares available for repurchase is 30.1 million shares.

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Stock-based Compensation

6 Months Ended

Jun. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-based Compensation

Stock-based Compensation

General

From time to time the Company grants certain stock-based compensation awards, including restricted stock awards, restricted stock units and performance share awards. Stock-based compensation expense associated with these awards was $5.7 million and $10.1 million in the second quarter of 2018 and 2017, respectively, and $11.1 million and $18.3 million during the first six months of 2018 and 2017, respectively. Stock-based compensation expense is included in general and administrative expense in the Condensed Consolidated Statement of Operations.

Refer to Note 13 of the Notes to the Consolidated Financial Statements in the Form 10-K/A for further description of the various types of stock-based compensation awards and the applicable award terms.

Restricted Stock Units

During the first six months of 2018, 74,148 restricted stock units were granted to non-employee directors of the Company with a weighted-average grant date value of $23.43 per unit. The fair value of these units is measured based on the closing stock price on grant date and compensation expense is recorded immediately. These units immediately vest and are issued when the director ceases to be a director of the Company.

Performance Share Awards

The performance period for the awards granted during the first six months of 2018 commenced on January 1, 2018 and ends on December 31, 2020. The Company used an annual forfeiture rate assumption ranging from 0% to 5% for purposes of recognizing stock-based compensation expense for its performance share awards.

Performance Share Awards Based on Internal Performance Metrics

The fair value of performance share award grants based on internal performance metrics is based on the closing stock price on the grant date. Each performance share award represents the right to receive up to 100% of the award in shares of common stock. Based on the Company’s probability assessment at June 30, 2018, it is considered probable that the criteria for all performance awards based on internal metrics awards will be met.

Employee Performance Share Awards.During the first six months of 2018, 531,670 Employee Performance Share Awards were granted at a grant date value of $23.25 per share. The performance metrics are set by the Company’s compensation committee and are based on the Company’s average production, average finding costs and average reserve replacement over a three-year performance period.

Hybrid Performance Share Awards.During the first six months of 2018, 321,720 Hybrid Performance Share Awards were granted at a grant date value of $23.25 per share. The 2018 awards vest 25% on each of the first and second anniversary dates and 50% on the third anniversary, provided that the Company has $100 million or more of operating cash flow for the year preceding the vesting date, as set by the Company’s compensation committee. If the Company does not meet the performance metric for the applicable period, then the portion of the performance shares that would have been issued on that anniversary date will be forfeited.

Performance Share Awards Based on Market Conditions

These awards have both an equity and liability component, with the right to receive up to the first 100% of the award in shares of common stock and the right to receive up to an additional 100% of the value of the award in excess of the equity component in cash. The equity portion of these awards is valued on the grant date and is not marked to market, while the liability portion of the awards is valued as of the end of each reporting period on a mark-to-market basis. The Company calculates the fair value of the equity and liability portions of the awards using a Monte Carlo simulation model.

TSR Performance Share Awards. During the first six months of 2018, 482,581 TSR Performance Share Awards were granted and are earned, or not earned, based on the comparative performance of the Company’s common stock measured against a predetermined group of companies in the Company’s peer group over a three-year performance period.

The following assumptions were used to determine the grant date fair value of the equity component (February 21, 2018) and the period-end fair value of the liability component of the TSR Performance Share Awards:

	Grant Date			June 30, 2018
Fair value per performance share award	$	19.92		$3.50-$13.45
Assumptions:
Stock price volatility	37.3		%	27.1% - 35.1%
Risk free rate of return	2.40		%	2.10% - 2.56%

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Earnings per Common Share

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Earnings per Common Share

Earnings per Common Share

Basic earnings per share (EPS) is computed by dividing net income by the weighted-average number of common shares outstanding for the period. Diluted EPS is similarly calculated except that the common shares outstanding for the period is increased using the treasury stock method to reflect the potential dilution that could occur if outstanding stock appreciation rights were exercised and stock awards were vested at the end of the applicable period. Anti-dilutive shares represent potentially dilutive securities that are excluded from the computation of diluted income or loss per share as their impact would be anti-dilutive.

The following is a calculation of basic and diluted weighted-average shares outstanding:

	Three Months Ended   June 30,		Six Months Ended   June 30,
(In thousands)	2018	2017	2018	2017
Weighted-average shares - basic	451,055	464,768	455,361	465,057
Dilution effect of stock appreciation rights and stock awards at end of period	2,059	1,977	1,781	1,695
Weighted-average shares - diluted	453,114	466,745	457,142	466,752

The following is a calculation of weighted-average shares excluded from diluted EPS due to the anti-dilutive effect:

	Three Months Ended   June 30,		Six Months Ended   June 30,
(In thousands)	2018	2017	2018	2017
Weighted-average stock appreciation rights and stock awards excluded from diluted EPS due to the anti-dilutive effect calculated using the treasury stock method	—	—	956	774

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Income Taxes

6 Months Ended

Jun. 30, 2018

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

On December 22, 2017, the U.S. enacted tax legislation referred to as the Tax Cuts and Jobs Act (the Tax Act) which significantly changes U.S. corporate income tax laws beginning, generally, in 2018. These changes include, among others, (i) a permanent reduction of the U.S. corporate income tax rate from a top marginal rate of 35% to a flat rate of 21%, (ii) elimination of the corporate alternative minimum tax, (iii) immediate deductions for certain new investments instead of deductions for depreciation expense over time, (iv) limitation on the tax deduction for interest expense to 30% of adjusted taxable income, (v) limitation of the deduction for net operating losses to 80% of current year taxable income and elimination of net operating loss carrybacks, and (vi) elimination of many business deductions and credits, including the domestic production activities deduction, the deduction for entertainment expenditures, and the deduction for certain executive compensation in excess of $1 million. The Company included the impacts of the Tax Act in the fourth quarter 2017 consolidated financial statements, and no changes were made to those provisional amounts during the first half of 2018. The Company will continue to examine the impact of this legislation and future regulations. Additional impacts from the enactment of the Tax Act will be recorded as they are identified during the measurement period as provided for in SAB No. 118, which extends up to one year from the enactment date. The 2018 tax provision reflects the law changes noted above, including the new corporate tax rate of 21%.

Income tax expense for the first six months of 2018 decreased $27.0 million compared to the first six months of 2017 due to a lower effective tax rate, partially offset by higher pre-tax income. The effective tax rates for the first six months of 2018 and 2017 were 24.5% and 38.2%, respectively. The decrease in the effective tax rate is primarily due to the impact of the Tax Act law changes that were effective January 1, 2018, partially offset by an increase in the blended state statutory tax rate as a result of changes in the Company's state apportionment factors due to the Eagle Ford Shale asset divestiture in February 2018.

During the second quarter of 2018, the Company recorded an $18.4 million net reserve for unrecognized tax benefits related to alternative minimum tax (AMT) associated with uncertain tax positions and a $5.5 million liability for accrued interest associated with the uncertain tax positions. Any additional AMT payments could be utilized as credits against future regular tax liabilities and would be fully refunded from 2018 through 2021 under the new Tax Act. Accordingly, the uncertain tax positions identified would not have a material impact on the Company's effective tax rate.

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Additional Balance Sheet Information

6 Months Ended

Jun. 30, 2018

Balance Sheet Related Disclosures [Abstract]

Additional Balance Sheet Information

Additional Balance Sheet Information

Certain balance sheet amounts are comprised of the following:

(In thousands)	June 30, 2018			December 31, 2017
Accounts receivable, net
Trade accounts	$	175,384		$	215,511
Joint interest accounts	1,551			467
Other accounts	4,896			1,312
	181,831			217,290
Allowance for doubtful accounts	(1,286		)	(1,286		)
	$	180,545		$	216,004
Other assets
Deferred compensation plan	$	16,050		$	14,966
Debt issuance costs	6,281			7,990
Income taxes receivable	3,047			—
Other accounts	202			56
	$	25,580		$	23,012
Accounts payable
Trade accounts	$	33,900		$	7,815
Natural gas purchases	27,852			4,299
Royalty and other owners	28,743			39,207
Accrued transportation	40,031			51,433
Accrued capital costs	24,854			31,130
Taxes other than income	9,426			16,801
Deposits received for asset sales	5,000			81,500
Other accounts	66,172			5,860
	$	235,978		$	238,045
Accrued liabilities
Employee benefits	$	11,113		$	20,645
Taxes other than income	1,562			550
Asset retirement obligations	1,000			4,952
Other accounts	142			1,294
	$	13,817		$	27,441
Other liabilities
Deferred compensation plan	$	27,849		$	29,145
Other accounts	32,699			10,578
	$	60,548		$	39,723

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Financial Statement Presentation (Policies)

6 Months Ended

Jun. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Recent Accounting Pronouncements

Recently Adopted Accounting Pronouncements

Revenue Recognition. In May 2014, the Financial Accounting Standards Boards (FASB) issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606) (Accounting Standards Codification (ASC) 606, as subsequently amended). ASC 606 supersedes the revenue recognition requirements in Topic 605 Revenue Recognition (ASC 605), and requires entities to recognize revenue when control of the promised goods or services is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The Company adopted ASC 606 as of January 1, 2018 using the modified retrospective transition method.

The adoption of ASC 606 also included the adoption and modification of other guidance, particularly the creation of ASC 340-40 on costs to obtain or fulfill contracts with customers and ASC 610-20 on gains or losses on derecognition of nonfinancial assets. ASC 340-40 provides additional capitalization, amortization and impairment guidance for certain costs associated with obtaining or fulfilling contracts subject to ASC 606. ASC 610-20 provides guidance on the measurement and recognition of gains and losses for disposals of assets that are not the outputs of ordinary activities, such as sales of fixed assets, when they are not businesses or deconsolidation of subsidiaries. The guidance in ASC 610-20 largely aligns with the guidance in ASC 606. It also supersedes most guidance on real estate sales that was contained in ASC 360-20; however, it does not apply to conveyances of oil and gas interests, which continue to be governed by guidance in ASC 932 for oil and gas extractive activities.

There was no material effect from the adoption of ASC 340-40 or ASC 610-20 separate from those discussed from the adoption of ASC 606.

Financial Instruments. In January 2016, the FASB issued ASU 2016-01, Financial Instruments - Overall, as an amendment to ASC Subtopic 825-10. The amendments in this update address certain aspects of recognition, measurement, presentation and disclosure of financial instruments. Among other items, this update will simplify the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment. When a qualitative assessment indicates that impairment exists, an entity is required to measure the investment at fair value. This impairment assessment reduces the complexity of the other-than-temporary impairment guidance that entities follow currently. The Company adopted ASU 2016-01 as of January 1, 2018. The adoption of this guidance did not have a material effect on the Company's financial position, results of operation or cash flows.

Statement of Cash Flows.In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230), which is intended to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. The guidance addresses eight specific cash flow issues for which current accounting guidance is either unclear or does not include specific guidance. The Company adopted this guidance effective January 1, 2018. In conjunction with the adoption, the Company made an accounting policy election to classify distributions it receives from its equity method investees based on the nature of distributions approach in which distributions received are classified on the basis of the nature of the activity that generated the distribution as either a return on investment (cash inflows from operating activities) or a return of investment (cash inflows from investing activities). The adoption of this guidance did not have a material effect on the Company's financial position, results of operation or cash flows.

Recently Issued Accounting Pronouncements

Leases. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). The new lease guidance supersedes Topic 840. The core principle of the guidance is that entities should recognize the assets and liabilities that arise from leases. This ASU does not apply to leases to explore for or use minerals, oil, natural gas and similar nonregenerative resources, including the intangible right to explore for those natural resources and rights to use the land in which those natural resources are contained. The guidance is effective for interim and annual periods beginning after December 15, 2018. This ASU is to be adopted using a modified retrospective approach. The Company plans to adopt this guidance effective January 1, 2019 and is currently evaluating the effect that adopting this guidance will have on its financial position, results of operations or cash flows.

Additionally, in January 2018, the FASB issued ASU No. 2018-01, Leases (Topic 842): Practical Expedient for Transition. The amendments in this update provide an optional transition to not evaluate existing or expired land easements that were not previously accounted for under current leases guidance in Topic 840. An entity that elects this practical expedient should evaluate new or modified land easements beginning at the date of adoption. An entity that does not elect this practical expedient should evaluate all existing or expired land easements in connection with the adoption of the new lease requirements in Topic 842 to assess whether they meet the definition of a lease. The Company is currently evaluating this guidance to determine whether or not to make use of this practical expedient.

Revenue Recognition

On January 1, 2018, the Company adopted ASC 606, Revenue from Contracts with Customers, and the related guidance in ASC 340-40 (the new revenue standard), and related guidance on gains and losses on derecognition of nonfinancial assets ASC 610-20, using the modified retrospective method applied to those contracts which were not completed as of January 1, 2018. Under the modified retrospective method, the Company recognizes the cumulative effect of initially applying the new revenue standard as an adjustment to the opening balance of retained earnings; however, no significant adjustment was required as a result of adopting the new revenue standard. Results for reporting periods beginning after January 1, 2018 are presented under the new revenue standard. The comparative information has not been restated and continues to be reported under the historic accounting standards in effect for those periods. The impact of the adoption of the new revenue standard is expected to be immaterial to the Company’s net income on an ongoing basis.

The Company’s revenue is typically generated from contracts to sell natural gas, crude oil or NGLs produced from interests in oil and gas properties owned by the Company. These contracts generally require the Company to deliver a specific amount of a commodity per day for a specified number of days at a price that is either fixed or variable. The contracts specify a delivery point which represents the point at which control of the product is transferred to the customer. These contracts frequently meet the definition of a derivative under ASC 815, and are accounted for as derivatives unless the Company elects to treat them as normal sales as permitted under that guidance. The Company typically elects to treat contracts to sell oil and gas production as normal sales, which are then accounted for as contracts with customers. The Company has determined that these contracts represent multiple performance obligations which are satisfied when control of the commodity transfers to the customer, typically through the delivery of the specified commodity to a designated delivery point.

Revenue is measured based on consideration specified in the contract with the customer, and excludes any amounts collected on behalf of third parties. The Company recognizes revenue in the amount that reflects the consideration it expects to be entitled to in exchange for transferring control of those goods to the customer. The contract consideration in the Company’s variable price contracts are typically allocated to specific performance obligations in the contract according to the price stated in the contract. Amounts allocated in the Company’s fixed price contracts are based on the standalone selling price of those products in the context of long-term, fixed price contracts, which generally approximates the contract price. Payment is generally received one or two months after the sale has occurred.

Gain or loss on derivative instruments is outside the scope of ASC 606 and is not considered revenue from contracts with customers subject to ASC 606. The Company may use financial or physical contracts accounted for as derivatives as economic hedges to manage price risk associated with normal sales, or in limited cases may use them for contracts the Company intends to physically settle but do not meet all of the criteria to be treated as normal sales.

Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, and that are collected by the Company from a customer, are excluded from revenue.

Producer Gas Imbalances. The Company applies the sales method of accounting for natural gas revenue. Under this method, revenues are recognized based on the actual volume of natural gas sold to purchasers. Natural gas production operations may include joint owners who take more or less than the production volumes entitled to them on certain properties. Production volume is monitored to minimize these natural gas imbalances. Under this method, a natural gas imbalance liability is recorded if the Company's excess takes of natural gas exceed its estimated remaining proved developed reserves for these properties at the actual price realized upon the gas sale. A receivable is recognized only to the extent an imbalance cannot be recouped from the reserves in the underlying properties. The Company’s aggregate imbalance positions at June 30, 2018 and December 31, 2017 were not material.

Brokered Natural Gas. Revenues and expenses related to brokered natural gas are reported gross as part of operating revenues and operating expenses in accordance with applicable accounting standards. The Company buys and sells natural gas utilizing separate purchase and sale transactions whereby the Company or the counterparty obtains control of the natural gas purchased or sold.

Disaggregation of Revenue. The following table presents revenues disaggregated by product:

	Three Months Ended June 30,					Six Months Ended June 30,
(In thousands)	2018			2017(1)		2018		2017(1)
OPERATING REVENUES
Natural gas	$	364,660		$	395,328	$	776,768	$	828,770
Crude oil and condensate	—			44,625		48,722		87,616
Brokered natural gas	92,576			4,037		97,526		8,732
Other	(121		)	2,662		1,749		5,994
Total revenues from contracts with customers	457,115			446,652		924,765		931,112
Gain (loss) on derivative instruments	(3,668		)	13,805		1,909		47,190
Total operating revenues	$	453,447		$	460,457	$	926,674	$	978,302

_______________________________________________________________________________

(1) As noted above, prior period amounts have not been adjusted under the modified retrospective method.

All of the Company’s revenues from contracts with customers represent products transferred at a point in time as control is transferred to the customer and are generated in the United States.

Transaction Price Allocated to Remaining Performance Obligations. A significant number of the Company’s product sales are short-term in nature with a contract term of one year or less. For those contracts, the Company has utilized the practical expedient exempting the Company from disclosure of the transaction price allocated to remaining performance obligations if the performance obligation is part of a contract that has an original expected duration of one year or less.

As of June 30, 2018, the Company has $8.6 billion of unsatisfied performance obligations related to natural gas sales that have a fixed pricing component and a contract term greater than one year. The Company expects to recognize these obligations over the next 20 years.

Contract Balances. Receivables from contracts with customers are recorded when the right to consideration becomes unconditional, generally when control of the product has been transferred to the customer. Receivables from contracts with customers were $175.4 million and $215.5 million as of June 30, 2018 and December 31, 2017, respectively, and are reported in accounts receivable, net on the Condensed Consolidated Balance Sheet. The Company currently has no assets or liabilities related to its revenue contracts, including no upfront or rights to deficiency payments.

Practical Expedients. The Company has made use of certain practical expedients in adopting the new revenue standard, including the value of unsatisfied performance obligations are not disclosed for (i) contracts with an original expected length of one year or less, (ii) contracts for which the Company recognizes revenue at the amount to which the Company has the right to invoice, (iii) variable consideration which is allocated entirely to a wholly unsatisfied performance obligation and meets the variable allocation criteria in the standard and (iv) only contracts that are not completed at transition.

The Company has not adjusted the promised amount of consideration for the effects of a significant financing component if the Company expects, at contract inception, that the period between when the Company transfers a promised good or service to the customer and when the customer pays for that good or service will be one year or less.

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Financial Statement Presentation (Tables)

6 Months Ended

Jun. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of New Accounting Pronouncements and Changes in Accounting Principles

The following table presents revenues disaggregated by product:

	Three Months Ended June 30,					Six Months Ended June 30,
(In thousands)	2018			2017(1)		2018		2017(1)
OPERATING REVENUES
Natural gas	$	364,660		$	395,328	$	776,768	$	828,770
Crude oil and condensate	—			44,625		48,722		87,616
Brokered natural gas	92,576			4,037		97,526		8,732
Other	(121		)	2,662		1,749		5,994
Total revenues from contracts with customers	457,115			446,652		924,765		931,112
Gain (loss) on derivative instruments	(3,668		)	13,805		1,909		47,190
Total operating revenues	$	453,447		$	460,457	$	926,674	$	978,302

_______________________________________________________________________________

(1) As noted above, prior period amounts have not been adjusted under the modified retrospective method.

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Properties and Equipment, Net (Tables)

6 Months Ended

Jun. 30, 2018

Property, Plant and Equipment [Abstract]

Schedule of properties and equipment, net

Properties and equipment, net are comprised of the following:

(In thousands)	June 30, 2018			December 31, 2017
Proved oil and gas properties	$	5,247,016		$	4,932,512
Unproved oil and gas properties	189,436			190,474
Gathering and pipeline systems	1,569			1,569
Land, building and other equipment	83,293			82,670
	5,521,314			5,207,225
Accumulated depreciation, depletion and amortization	(2,295,821		)	(2,135,021		)
	$	3,225,493		$	3,072,204

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Equity Method Investments (Tables)

6 Months Ended

Jun. 30, 2018

Equity Method Investments and Joint Ventures [Abstract]

Summary of Information Related to the Company's Equity Method Investments

Activity related to these equity method investments is as follows:

	Constitution						Meade						Total
	Six Months Ended June 30,
(In thousands)	2018			2017			2018			2017			2018			2017
Balance at beginning of period	$	732		$	96,850		$	85,345		$	32,674		$	86,077		$	129,524
Contributions	250			3,125			62,655			10,501			62,905			13,626
Loss on equity method investments	(982		)	(2,555		)	(16		)	(14		)	(998		)	(2,569		)
Balance at end of period	$	—		$	97,420		$	147,984		$	43,161		$	147,984		$	140,581

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Debt and Credit Agreements (Tables)

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Debt and credit agreement components

The Company’s debt and credit agreements consisted of the following:

(In thousands)	June 30, 2018			December 31, 2017
Total debt
6.51% weighted-average senior notes (1)	$	361,000		$	361,000
9.78% senior notes (2)	67,000			67,000
5.58% weighted-average senior notes	175,000			175,000
3.65% weighted-average senior notes	925,000			925,000
Revolving credit facility	—			—
Unamortized debt issuance costs	(5,428		)	(6,109		)
	$	1,522,572		$	1,521,891

_______________________________________________________________________________

(1) Includes $237.0 million of current portion of long-term debt at June 30, 2018 and December 31, 2017, respectively.

(2) Includes $67.0 million of current portion of long-term debt at June 30, 2018 and December 31, 2017, respectively.

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Derivative Instruments and Hedging Activities (Tables)

6 Months Ended

Jun. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Outstanding commodity derivatives

As of June 30, 2018, the Company had the following outstanding financial commodity derivatives:

						Basis Swaps
				Swaps
Type of Contract	Volume		Contract Period	Weighted-Average		Weighted-Average
Natural gas (Leidy)	17.9	Bcf	Jul. 2018 - Dec. 2018			$	(0.69	)
Natural gas (Transco)	16.0	Bcf	Jul. 2018 - Dec. 2019			$	0.42
Natural gas (NYMEX)	46.5	Bcf	Jul. 2018 - Dec. 2018	$	2.93
Natural gas (NYMEX)	6.0	Bcf	Jul. 2018 - Oct. 2018	$	3.10

As of June 30, 2018, the Company had the following outstanding physical commodity derivatives:

Type of Contract	Volume		Contract Period	Weighted-Average Fixed Price
Natural gas purchase	6.0	Bcf	Jul. 2018 - Oct. 2018	$	3.67

Effect of derivative instruments on the condensed consolidated balance sheet

Effect of Derivative Instruments on the Condensed Consolidated Balance Sheet

		Derivative Assets				Derivative Liabilities
(In thousands)	Balance Sheet Location	June 30, 2018		December 31, 2017		June 30, 2018		December 31, 2017
Commodity contracts	Derivative instruments (current)	$	—	$	—	$	9,589	$	30,637
Commodity contracts	Derivative instruments (non-current)	3,412		2,239		—		—
		$	3,412	$	2,239	$	9,589	$	30,637

Schedule of offsetting of derivative liabilities in the condensed consolidated balance sheet

Offsetting of Derivative Assets and Liabilities in the Condensed Consolidated Balance Sheet

(In thousands)	June 30, 2018			December 31, 2017
Derivative assets
Gross amounts of recognized assets	$	4,474		$	2,239
Gross amounts offset in the statement of financial position	(1,062		)	—
Net amounts of assets presented in the statement of financial position	3,412			2,239
Gross amounts of financial instruments not offset in the statement of financial position	—			—
Net amount	$	3,412		$	2,239
Derivative liabilities
Gross amounts of recognized liabilities	$	10,651		$	30,637
Gross amounts offset in the statement of financial position	(1,062		)	—
Net amounts of liabilities presented in the statement of financial position	9,589			30,637
Gross amounts of financial instruments not offset in the statement of financial position	—			241
Net amount	$	9,589		$	30,878

Schedule of offsetting of derivative assets in the condensed consolidated balance sheet

Offsetting of Derivative Assets and Liabilities in the Condensed Consolidated Balance Sheet

(In thousands)	June 30, 2018			December 31, 2017
Derivative assets
Gross amounts of recognized assets	$	4,474		$	2,239
Gross amounts offset in the statement of financial position	(1,062		)	—
Net amounts of assets presented in the statement of financial position	3,412			2,239
Gross amounts of financial instruments not offset in the statement of financial position	—			—
Net amount	$	3,412		$	2,239
Derivative liabilities
Gross amounts of recognized liabilities	$	10,651		$	30,637
Gross amounts offset in the statement of financial position	(1,062		)	—
Net amounts of liabilities presented in the statement of financial position	9,589			30,637
Gross amounts of financial instruments not offset in the statement of financial position	—			241
Net amount	$	9,589		$	30,878

Effect of derivatives on the condensed consolidated statement of operations

Effect of Derivative Instruments on the Condensed Consolidated Statement of Operations

	Three Months Ended   June 30,					Six Months Ended   June 30,
(In thousands)	2018			2017		2018			2017
Cash received (paid) on settlement of derivative instruments
Gain (loss) on derivative instruments	$	5,819		$	1,204	$	(20,312	)	$	(319	)
Non-cash gain (loss) on derivative instruments
Gain (loss) on derivative instruments	(9,487		)	12,601		22,221			47,509
	$	(3,668	)	$	13,805	$	1,909		$	47,190

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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Financial assets and liabilities measured at fair value on a recurring basis

The following fair value hierarchy table presents information about the Company’s financial assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at    June 30, 2018
Assets
Deferred compensation plan	$	16,050	$	—	$	—	$	16,050
Derivative instruments	—		577		3,897		4,474
Total assets	$	16,050	$	577	$	3,897	$	20,524
Liabilities
Deferred compensation plan	$	27,849	$	—	$	—	$	27,849
Derivative instruments	—		5,415		5,236		10,651
Total liabilities	$	27,849	$	5,415	$	5,236	$	38,500

(In thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at    December 31, 2017
Assets
Deferred compensation plan	$	14,966	$	—	$	—	$	14,966
Derivative instruments	—		—		2,239		2,239
Total assets	$	14,966	$	—	$	2,239	$	17,205
Liabilities
Deferred compensation plan	$	29,145	$	—	$	—	$	29,145
Derivative instruments	—		—		30,637		30,637
Total liabilities	$	29,145	$	—	$	30,637	$	59,782

Reconciliation of changes in the fair value of financial assets and liabilities classified as level 3

The following table sets forth a reconciliation of changes in the fair value of financial assets and liabilities classified as Level 3 in the fair value hierarchy:

	Six Months Ended   June 30,
(In thousands)	2018			2017
Balance at beginning of period	$	(28,398	)	$	(15,868	)
Total gain (loss) included in earnings	9,019			30,758
Settlement (gain) loss	18,040			(3,537		)
Transfers in and/or out of level 3	—			—
Balance at end of period	$	(1,339	)	$	11,353
Change in unrealized gains (losses) relating to assets and liabilities still held at the end of the period	$	(1,276	)	$	17,915

Carrying amounts and fair values of debt

The carrying amount and fair value of debt is as follows:

	June 30, 2018						December 31, 2017
(In thousands)	Carrying Amount			Estimated Fair Value			Carrying Amount			Estimated Fair Value
Long-term debt	$	1,522,572		$	1,486,210		$	1,521,891		$	1,527,624
Current maturities	(304,000		)	(305,966		)	(304,000		)	(312,055		)
Long-term debt, excluding current maturities	$	1,218,572		$	1,180,244		$	1,217,891		$	1,215,569

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Asset Retirement Obligations (Tables)

6 Months Ended

Jun. 30, 2018

Asset Retirement Obligation Disclosure [Abstract]

Activity Related to Asset Retirement Obligations

Activity related to the Company’s asset retirement obligations is as follows:

(In thousands)	Six Months Ended   June 30, 2018
Balance at beginning of period(1)	$	48,553
Liabilities incurred	2,322
Liabilities settled	(789		)
Liabilities divested	(3,782		)
Accretion expense	1,223
Balance at end of period(2)	$	47,527

_______________________________________________________________________________

(1) Includes $5.0 million of current asset retirement obligations included in accrued liabilities at December 31, 2017.

(2) Includes $1.0 million of current asset retirement obligations included in accrued liabilities at June 30, 2018.

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Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions

The following assumptions were used to determine the grant date fair value of the equity component (February 21, 2018) and the period-end fair value of the liability component of the TSR Performance Share Awards:

	Grant Date			June 30, 2018
Fair value per performance share award	$	19.92		$3.50-$13.45
Assumptions:
Stock price volatility	37.3		%	27.1% - 35.1%
Risk free rate of return	2.40		%	2.10% - 2.56%

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Earnings per Common Share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Calculation of basic and diluted weighted-average shares outstanding

The following is a calculation of basic and diluted weighted-average shares outstanding:

	Three Months Ended   June 30,		Six Months Ended   June 30,
(In thousands)	2018	2017	2018	2017
Weighted-average shares - basic	451,055	464,768	455,361	465,057
Dilution effect of stock appreciation rights and stock awards at end of period	2,059	1,977	1,781	1,695
Weighted-average shares - diluted	453,114	466,745	457,142	466,752

Calculation of weighted-average shares excluded from diluted EPS due to the anti-dilutive effect

The following is a calculation of weighted-average shares excluded from diluted EPS due to the anti-dilutive effect:

	Three Months Ended   June 30,		Six Months Ended   June 30,
(In thousands)	2018	2017	2018	2017
Weighted-average stock appreciation rights and stock awards excluded from diluted EPS due to the anti-dilutive effect calculated using the treasury stock method	—	—	956	774

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Additional Balance Sheet Information (Tables)

6 Months Ended

Jun. 30, 2018

Balance Sheet Related Disclosures [Abstract]

Additional Balance Sheet Information

Certain balance sheet amounts are comprised of the following:

(In thousands)	June 30, 2018			December 31, 2017
Accounts receivable, net
Trade accounts	$	175,384		$	215,511
Joint interest accounts	1,551			467
Other accounts	4,896			1,312
	181,831			217,290
Allowance for doubtful accounts	(1,286		)	(1,286		)
	$	180,545		$	216,004
Other assets
Deferred compensation plan	$	16,050		$	14,966
Debt issuance costs	6,281			7,990
Income taxes receivable	3,047			—
Other accounts	202			56
	$	25,580		$	23,012
Accounts payable
Trade accounts	$	33,900		$	7,815
Natural gas purchases	27,852			4,299
Royalty and other owners	28,743			39,207
Accrued transportation	40,031			51,433
Accrued capital costs	24,854			31,130
Taxes other than income	9,426			16,801
Deposits received for asset sales	5,000			81,500
Other accounts	66,172			5,860
	$	235,978		$	238,045
Accrued liabilities
Employee benefits	$	11,113		$	20,645
Taxes other than income	1,562			550
Asset retirement obligations	1,000			4,952
Other accounts	142			1,294
	$	13,817		$	27,441
Other liabilities
Deferred compensation plan	$	27,849		$	29,145
Other accounts	32,699			10,578
	$	60,548		$	39,723

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Financial Statement Presentation - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Unsatisfied performance obligations	$ 8,600.0
Unsatisfied performance obligations, expected period of satisfaction	20 years
Contracts with customers	$ 175.4	$ 215.5

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Financial Statement Presentation - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	$ 457,115	$ 446,652	$ 924,765	$ 931,112
Gain (loss) on derivative instruments	(3,668)	13,805	1,909	47,190
TOTAL OPERATING REVENUES	453,447	460,457	926,674	978,302
Natural gas
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	364,660	395,328	776,768	828,770
Crude oil and condensate
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	0	44,625	48,722	87,616
Brokered natural gas
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	92,576	4,037	97,526	8,732
Other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	$ (121)	$ 2,662	$ 1,749	$ 5,994

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Properties and Equipment, Net - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Proved oil and gas properties	$ 5,247,016	$ 4,932,512
Unproved oil and gas properties	189,436	190,474
Gathering and pipeline systems	1,569	1,569
Land, building and other equipment	83,293	82,670
Properties and equipment, gross, total	5,521,314	5,207,225
Accumulated depreciation, depletion and amortization	(2,295,821)	(2,135,021)
Properties and equipment, net	$ 3,225,493	$ 3,072,204

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Properties and Equipment, Net - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended			6 Months Ended
	Jul. 31, 2018	Feb. 28, 2018	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Property, Plant and Equipment [Line Items]
Proceeds from sale of assets						$ 646,868	$ 1,475
Impairment of oil and gas properties and other assets			$ 0		$ 68,555	0	68,555
Loss on sale of assets			$ (544)		$ 1,403	40,505	$ 1,626
Haynesville Shale | Oil and Gas Properties, Proved and Unproved
Property, Plant and Equipment [Line Items]
Proceeds from sale of assets				$ 5,000
East Texas | Oil and Gas Properties, Proved and Unproved
Property, Plant and Equipment [Line Items]
Proceeds from sale of assets		$ 765,000
Impairment of oil and gas properties and other assets				$ 414,300
West Virginia, Virginia, and Ohio | Oil and Gas Properties, Proved and Unproved
Property, Plant and Equipment [Line Items]
Loss on sale of assets						$ 44,200
Subsequent Event | Haynesville Shale | Oil and Gas Properties, Proved and Unproved
Property, Plant and Equipment [Line Items]
Proceeds from sale of assets	$ 30,000

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Equity Method Investments - Activity Related to Equity Method Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Equity Method Investments
Balance at beginning of period			$ 86,077	$ 129,524
Contributions			62,905	13,626
Loss on equity method investments	$ (4)	$ (1,286)	(998)	(2,569)
Balance at end of period	$ 147,984	140,581	$ 147,984	140,581
Constitution
Schedule of Equity Method Investments [Line Items]
Ownership percentage	25.00%		25.00%
Equity Method Investments
Balance at beginning of period			$ 732	96,850
Contributions			250	3,125
Loss on equity method investments			(982)	(2,555)
Balance at end of period	$ 0	97,420	0	97,420
Basis difference in investment	$ 95,900		$ 95,900
Meade
Schedule of Equity Method Investments [Line Items]
Ownership percentage	20.00%		20.00%
Equity Method Investments
Balance at beginning of period			$ 85,345	32,674
Contributions			62,655	10,501
Loss on equity method investments			(16)	(14)
Balance at end of period	$ 147,984	$ 43,161	147,984	$ 43,161
Investment Commitment
Equity Method Investments
Expected future contributions	$ 70,000		$ 70,000

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Debt and Credit Agreements - Schedule of Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ (5,428)	$ (6,109)
Long-term debt, net	1,522,572	1,521,891
Current maturities	304,000	304,000
6.51% weighted-average senior notes
Debt Instrument [Line Items]
Total debt	$ 361,000	$ 361,000
Weighted average interest rate	6.51%	6.51%
Current maturities	$ 237,000
9.78% senior notes
Debt Instrument [Line Items]
Total debt	$ 67,000	$ 67,000
Long-term debt, interest rate, stated percentage	9.78%	9.78%
Current maturities	$ 67,000
5.58% weighted-average senior notes
Debt Instrument [Line Items]
Total debt	$ 175,000	$ 175,000
Weighted average interest rate	5.58%	5.58%
3.65% weighted-average senior notes
Debt Instrument [Line Items]
Total debt	$ 925,000	$ 925,000
Weighted average interest rate	3.65%	3.65%
Revolving credit facility
Debt Instrument [Line Items]
Total debt	$ 0	$ 0

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Debt and Credit Agreements - Narrative (Details) - USD ($)	1 Months Ended
	Jul. 31, 2018	Jun. 30, 2018	Apr. 18, 2018	Dec. 31, 2017
Revolving credit facility
Debt Instrument [Line Items]
Borrowing base			$ 3,200,000,000.0
Remaining borrowing capacity		$ 1,700,000,000	$ 1,700,000,000
Line of credit		$ 0
6.51% weighted-average senior notes
Debt Instrument [Line Items]
Weighted average interest rate		6.51%		6.51%
Subsequent Event | 6.51% weighted-average senior notes
Debt Instrument [Line Items]
Repayments of senior notes	$ 237,000,000

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Derivative Instruments and Hedging Activities - Outstanding Commodity Derivatives (Details) Bcf in Millions	6 Months Ended
	Jun. 30, 2018 $ / Mcf Bcf
Natural gas (Leidy)
Derivative [Line Items]
Volume (in Bcf for gas and mmbbls for oil) | Bcf	17.9
Swaps Weighted Average (in usd per Mcf or usd per bbl) | $ / Mcf	(0.69)
Natural gas (Transco)
Derivative [Line Items]
Volume (in Bcf for gas and mmbbls for oil) | Bcf	16.0
Swaps Weighted Average (in usd per Mcf or usd per bbl) | $ / Mcf	0.42
Natural gas (NYMEX)
Derivative [Line Items]
Volume (in Bcf for gas and mmbbls for oil) | Bcf	46.5
Swaps Weighted Average (in usd per Mcf or usd per bbl) | $ / Mcf	2.93
Natural gas (NYMEX)
Derivative [Line Items]
Volume (in Bcf for gas and mmbbls for oil) | Bcf	6.0
Swaps Weighted Average (in usd per Mcf or usd per bbl) | $ / Mcf	3.10
Natural gas purchase
Derivative [Line Items]
Volume (in Bcf for gas and mmbbls for oil) | Bcf	6.0
Swaps Weighted Average (in usd per Mcf or usd per bbl) | $ / Mcf	3.67

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Derivative Instruments and Hedging Activities - Effect of Derivative Instruments on the Condensed Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Effect of derivative instruments on the Consolidated Balance Sheet
Derivative Assets	$ 3,412	$ 2,239
Derivatives Not Designated as Hedges | Commodity contracts
Effect of derivative instruments on the Consolidated Balance Sheet
Derivative Assets	3,412	2,239
Derivative Liabilities	9,589	30,637
Derivative instruments (current) | Derivatives Not Designated as Hedges | Commodity contracts
Effect of derivative instruments on the Consolidated Balance Sheet
Derivative Assets	0	0
Derivative Liabilities	9,589	30,637
Derivative instruments (non-current) | Derivatives Not Designated as Hedges | Commodity contracts
Effect of derivative instruments on the Consolidated Balance Sheet
Derivative Assets	3,412	2,239
Derivative Liabilities	$ 0	$ 0

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Derivative Instruments and Hedging Activities - Offsetting of Derivative Assets and Liabilities in the Condensed Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Derivative assets
Gross amounts of recognized assets	$ 4,474	$ 2,239
Gross amounts offset in the statement of financial position	(1,062)	0
Net amounts of assets presented in the statement of financial position	3,412	2,239
Gross amounts of financial instruments not offset in the statement of financial position	0	0
Net amount	3,412	2,239
Derivative liabilities
Gross amounts of recognized liabilities	10,651	30,637
Gross amounts offset in the statement of financial position	(1,062)	0
Net amounts of liabilities presented in the statement of financial position	9,589	30,637
Gross amounts of financial instruments not offset in the statement of financial position	0	241
Net amount	$ 9,589	$ 30,878

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Derivative Instruments and Hedging Activities - Effect of Derivative Instruments on the Condensed Consolidated Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Cash received (paid) on settlement of derivative instruments, gain (loss) on derivative instruments	$ 5,819	$ 1,204	$ (20,312)	$ (319)
Non-cash gain (loss) on derivative instruments, gain (loss) on derivative instruments	(9,487)	12,601	22,221	47,509
Gain (loss) on derivative instruments	$ (3,668)	$ 13,805	$ 1,909	$ 47,190

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Fair Value Measurements - Financial Assets and Liabilities, Recurring (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Assets
Deferred compensation plan	$ 16,050	$ 14,966
Derivative instruments	4,474	2,239
Liabilities
Deferred compensation plan	27,849	29,145
Recurring basis
Assets
Deferred compensation plan	16,050	14,966
Derivative instruments	4,474	2,239
Total assets	20,524	17,205
Liabilities
Deferred compensation plan	27,849	29,145
Derivative instruments	10,651	30,637
Total liabilities	38,500	59,782
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring basis
Assets
Deferred compensation plan	16,050	14,966
Derivative instruments	0	0
Total assets	16,050	14,966
Liabilities
Deferred compensation plan	27,849	29,145
Derivative instruments	0	0
Total liabilities	27,849	29,145
Significant Other Observable Inputs (Level 2) | Recurring basis
Assets
Deferred compensation plan	0	0
Derivative instruments	577	0
Total assets	577	0
Liabilities
Deferred compensation plan	0	0
Derivative instruments	5,415	0
Total liabilities	5,415	0
Significant Unobservable Inputs (Level 3) | Recurring basis
Assets
Deferred compensation plan	0	0
Derivative instruments	3,897	2,239
Total assets	3,897	2,239
Liabilities
Deferred compensation plan	0	0
Derivative instruments	5,236	30,637
Total liabilities	$ 5,236	$ 30,637

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Fair Value Measurements - Reconciliation of Changes in Fair Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Reconciliation of changes in the fair value of financial assets and liabilities classified as Level 3 in the fair value hierarchy
Balance at beginning of period	$ (28,398)	$ (15,868)
Total gain included in earnings	9,019	30,758
Settlement (gain) loss	18,040	(3,537)
Transfers in and/or out of level 3	0	0
Balance at end of period	(1,339)	11,353
Change in unrealized gains (losses) relating to assets and liabilities still held at the end of the period	$ (1,276)	$ 17,915

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Fair Value Measurements - Narrative (Details)	6 Months Ended
	Jun. 30, 2018 USD ($) impaired_asset_and_liability	Jun. 30, 2017 impaired_asset_and_liability	Dec. 31, 2017 USD ($)
Fair Value Disclosures [Abstract]
Fair value assets, level 1 to level 2	$ 0		$ 0
Fair value liabilities, level 1 to level 2	0		0
Fair value assets, level 2 to level 1	0		0
Fair value liabilities, level 2 to level 1	$ 0		$ 0
Number of non-financial assets and liabilities impaired | impaired_asset_and_liability	0	0

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Fair Value Measurements - Fair Value of Other Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair value disclosures
Long-term debt	$ 1,522,572	$ 1,521,891
Current maturities	(304,000)	(304,000)
Long-term debt, excluding current maturities	1,218,572	1,217,891
Carrying Amount
Fair value disclosures
Long-term debt	1,522,572	1,521,891
Current maturities	(304,000)	(304,000)
Long-term debt, excluding current maturities	1,218,572	1,217,891
Estimated Fair Value
Fair value disclosures
Long-term debt	1,486,210	1,527,624
Current maturities	(305,966)	(312,055)
Long-term debt, excluding current maturities	$ 1,180,244	$ 1,215,569

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Asset Retirement Obligations - Schedule of ARO (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)
Asset Retirement Obligation
Balance at beginning of period	$ 48,553
Liabilities incurred	2,322
Liabilities settled	(789)
Liabilities divested	(3,782)
Accretion expense	1,223
Balance at end of period	$ 47,527

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Asset Retirement Obligations - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Asset retirement obligations	$ 1,000	$ 4,952
Accrued Liabilities
Property, Plant and Equipment [Line Items]
Asset retirement obligations	$ 1,000	$ 5,000

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Capital Stock - Narrative (Details) - USD ($) $ in Millions	1 Months Ended		6 Months Ended
	Jul. 31, 2018	Feb. 28, 2018	Jun. 30, 2018	Dec. 31, 2017
Equity [Abstract]
Treasury stock			34,909,705	14,935,926
Remaining shares available for repurchase (in shares)			10,100,000
Subsequent Event [Line Items]
Incremental shares authorized		25,000,000
Shares authorized for repurchase		30,100,000
Shares repurchased			20,000,000
Treasury stock repurchases (in usd)			$ 481.5
Subsequent Event
Subsequent Event [Line Items]
Incremental shares authorized	20,000,000
Shares authorized for repurchase	30,100,000
Shares repurchased	2,600,000

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Stock-based Compensation - Narrative (Details) - USD ($)		3 Months Ended		6 Months Ended
	Feb. 21, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Stock-based Compensation arrangements
Stock based compensation expense		$ 5,700,000	$ 10,100,000	$ 11,100,000	$ 18,300,000
Restricted Stock Units
Stock-based Compensation arrangements
Granted (in shares)				74,148
Granted (in dollars per share)				$ 23.43
Performance Share Awards | Minimum
Stock-based Compensation arrangements
Annual forfeiture rate assumption (as a percent)				0.00%
Performance Share Awards | Maximum
Stock-based Compensation arrangements
Annual forfeiture rate assumption (as a percent)				5.00%
Performance Share Awards Based on Internal Performance Metrics
Stock-based Compensation arrangements
Right to receive additional shares, maximum (as a percent)				100.00%
Employee Performance Share Awards
Stock-based Compensation arrangements
Granted (in shares)				531,670
Granted (in dollars per share)				$ 23.25
Number of years over which performance criteria is to be met				3 years
Hybrid Performance Share Awards
Stock-based Compensation arrangements
Granted (in shares)				321,720
Granted (in dollars per share)				$ 23.25
Minimum operating cash flow for the year preceding the performance period				$ 100,000,000
Hybrid Performance Share Awards | Hybrid performance share awards, percentage vesting on the first anniversary
Stock-based Compensation arrangements
Award vesting rights (as a percent)		25.00%
Hybrid Performance Share Awards | Hybrid performance share awards, percentage vesting on the second anniversary
Stock-based Compensation arrangements
Award vesting rights (as a percent)		25.00%
Hybrid Performance Share Awards | Hybrid performance share awards, percentage vesting on the third anniversary
Stock-based Compensation arrangements
Award vesting rights (as a percent)		50.00%
Performance Shares Based on Market Conditions
Stock-based Compensation arrangements
Right to receive shares (as a percent)				100.00%
Right to receive an additional award in cash (as a percent)				100.00%
TSR Performance Share Awards
Stock-based Compensation arrangements
Granted (in shares)				482,581
Granted (in dollars per share)	$ 19.92
Performance period				3 years
TSR Performance Share Awards | Minimum
Stock-based Compensation arrangements
Granted (in dollars per share)				$ 3.50
TSR Performance Share Awards | Maximum
Stock-based Compensation arrangements
Granted (in dollars per share)				$ 13.45

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Stock-based Compensation - Assumptions for TSR Shares (Details) - TSR Performance Share Awards - $ / shares		6 Months Ended
	Feb. 21, 2018	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in dollars per share)	$ 19.92
Stock price volatility	37.30%
Risk free rate of return	2.40%
Minimum expected volatility		27.10%
Maximum expected volatility		35.10%
Minimum risk free interest rate		2.10%
Maximum risk free interest rate		2.56%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in dollars per share)		$ 3.50
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in dollars per share)		$ 13.45

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Income Taxes - Narrative (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Tax reserve	$ 18.4
Interest associated with uncertain tax positions	5.5
Decrease in income taxes	$ (27.0)
Effective tax rate	24.50%	38.20%

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Earnings per Common Share - Schedule of EPS (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Weighted-average shares - basic	451,055	464,768	455,361	465,057
Dilution effect of stock appreciation rights and stock awards at end of period	2,059	1,977	1,781	1,695
Weighted-average shares - diluted	453,114	466,745	457,142	466,752

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Earnings per Common Share - Calculation of Weighted-Average Shares Excluded from Diluted EPS (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Stock appreciation rights and stock awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted-average stock appreciation rights and stock awards excluded from diluted EPS due to the anti-dilutive effect calculated using the treasury stock method	0	0	956	774

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Additional Balance Sheet Information - Schedule of Additional Balance Sheet Information (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Accounts receivable, net
Trade accounts	$ 175,384	$ 215,511
Joint interest accounts	1,551	467
Other accounts	4,896	1,312
Accounts receivable, gross	181,831	217,290
Allowance for doubtful accounts	(1,286)	(1,286)
Accounts receivable, net	180,545	216,004
Other assets
Deferred compensation plan	16,050	14,966
Debt issuance costs	6,281	7,990
Income taxes receivable	3,047	0
Other accounts	202	56
Other assets	25,580	23,012
Accounts payable
Trade accounts	33,900	7,815
Natural gas purchases	27,852	4,299
Royalty and other owners	28,743	39,207
Accrued transportation	40,031	51,433
Accrued capital costs	24,854	31,130
Taxes other than income	9,426	16,801
Deposits received for asset sales	5,000	81,500
Other accounts	66,172	5,860
Accounts payable	235,978	238,045
Accrued liabilities
Employee benefits	11,113	20,645
Taxes other than income	1,562	550
Asset retirement obligations	1,000	4,952
Other accounts	142	1,294
Accrued liabilities	13,817	27,441
Other liabilities
Deferred compensation plan	27,849	29,145
Other accounts	32,699	10,578
Other liabilities	$ 60,548	$ 39,723