10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2014

OR

o  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM ______________ TO _______________

Commission file number 1-7810

Energen Corporation

(Exact name of registrant as specified in its charter)

Alabama	63-0757759
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

605 Richard Arrington Jr. Boulevard North, Birmingham, Alabama 35203-2707	35203-2707
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code

(205) 326-2700

Indicate by a check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities and Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. YES x NO o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted 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 and post such files). YES x NO o

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

Large accelerated filer x Accelerated filer o Non-accelerated filer o Smaller reporting company 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 x

Number of shares outstanding of each of the registrant’s classes of common stock as of October 31, 2014.

Energen Corporation  $0.01 par value 73,203,569

ENERGEN CORPORATION

FORM 10-Q FOR THE QUARTER ENDED SEPTEMBER 30, 2014

TABLE OF CONTENTS

		Page
PART I: FINANCIAL INFORMATION
Item 1.	Financial Statements (Unaudited)
	Consolidated Balance Sheets	3
	Consolidated Statements of Income	5
	Consolidated Statements of Comprehensive Income	6
	Consolidated Statements of Cash Flows	7
	Condensed Notes to Unaudited Consolidated Financial Statements	8
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	26
	Selected Business Segment Data of Energen Corporation	39
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	40
Item 4.	Controls and Procedures	42
PART II: OTHER INFORMATION
Item 1.	Legal Proceedings	43
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	43
Item 6.	Exhibits	43
SIGNATURES		44

2

PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

ENERGEN CORPORATION
CONSOLIDATED BALANCE SHEETS
(Unaudited)
(in thousands)	September 30, 2014		December 31, 2013
ASSETS
Current Assets
Cash and cash equivalents	$	1,321	$	2,523
Short-term investments	18,000		—
Accounts receivable, net of allowance for doubtful accounts of $681 and $696 at September 30, 2014 and December 31, 2013, respectively	185,342		136,334
Inventories	14,373		11,130
Assets held for sale with prior period comparable	—		1,242,872
Deferred income taxes	8,085		21,250
Derivative instruments	30,195		17,463
Prepayments and other	31,205		9,989
Total current assets	288,521		1,441,561
Property, Plant and Equipment
Oil and natural gas properties, successful efforts method
Proved properties	7,635,488		6,695,400
Unproved properties	158,500		168,975
Less accumulated depreciation, depletion and amortization	2,336,114		1,776,802
Oil and natural gas properties, net	5,457,874		5,087,573
Other property and equipment, net	43,355		30,515
Total property, plant and equipment, net	5,501,229		5,118,088
Other postretirement assets	4,566		8,894
Noncurrent derivative instruments	5,758		5,439
Other assets	32,896		48,230
TOTAL ASSETS	$	5,832,970	$	6,622,212

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

3

ENERGEN CORPORATION
CONSOLIDATED BALANCE SHEETS
(Unaudited)
(in thousands, except share and per share data)	September 30, 2014			December 31, 2013
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current Liabilities
Long-term debt due within one year	$	—		$	60,000
Notes payable to banks	—			489,000
Accounts payable	110,955			78,178
Accrued taxes	227,180			8,201
Accrued wages and benefits	39,515			27,036
Accrued capital costs	131,792			93,623
Revenue and royalty payable	65,271			51,519
Liabilities related to assets held for sale with prior period comparable	—			831,570
Derivative instruments	808			30,302
Other	17,917			21,796
Total current liabilities	593,438			1,691,225
Long-term debt	632,458			1,093,541
Asset retirement obligations	115,431			108,533
Pension liabilities	41,264			47,484
Deferred income taxes	1,074,690			807,614
Noncurrent derivative instruments	640			398
Other long-term liabilities	13,801			15,398
Total liabilities	2,471,722			3,764,193
Commitments and Contingencies
Shareholders’ Equity
Preferred stock, cumulative, $0.01 par value, 5,000,000 shares authorized	—			—
Common shareholders’ equity
Common stock, $0.01 par value; 150,000,000 shares authorized; 76,098,344 shares and 75,574,156 shares issued at September 30, 2014 and December 31, 2013, respectively	761			756
Premium on capital stock	561,826			523,711
Retained earnings	2,946,390			2,476,616
Accumulated other comprehensive income (loss), net of tax
Unrealized gain on hedges, net	3,618			13,362
Pension and postretirement plans	(26,313		)	(32,245		)
Interest rate swap	—			(1,184		)
Deferred compensation plan	3,320			3,259
Treasury stock, at cost; 2,986,201 shares and 2,967,999 shares at September 30, 2014 and December 31, 2013, respectively	(128,354		)	(126,256		)
Total shareholders’ equity	3,361,248			2,858,019
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$	5,832,970		$	6,622,212

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

4

ENERGEN CORPORATION
CONSOLIDATED STATEMENTS OF INCOME
(Unaudited)
	Three months ended						Nine months ended
	September 30,						September 30,
(in thousands, except per share data)	2014			2013			2014			2013
Revenues
Oil, natural gas liquids and natural gas sales	$	350,773		$	360,507		$	1,057,447		$	927,746
Gain (loss) on derivative instruments, net	147,735			(88,192		)	9,498			(51,904		)
Loss on sale of assets and other	(747		)	(277		)	(1,809		)	(492		)
Total revenues	497,761			272,038			1,065,136			875,350
Operating Costs and Expenses
Oil, natural gas liquids and natural gas production	67,720			65,795			199,861			190,944
Production and ad valorem taxes	25,729			22,230			81,102			69,109
Depreciation, depletion and amortization	139,104			124,911			399,568			332,247
Asset impairment	179,074			—			179,074			—
Exploration	8,255			8,949			23,644			13,902
General and administrative	27,784			30,947			93,499			86,699
Accretion of discount on asset retirement obligations	1,924			1,771			5,650			5,187
Total costs and expenses	449,590			254,603			982,398			698,088
Operating Income	48,171			17,435			82,738			177,262
Other Income (Expense)
Interest expense	(11,522		)	(10,149		)	(27,374		)	(30,232		)
Other income	37			1,249			1,047			2,619
Total other expense	(11,485		)	(8,900		)	(26,327		)	(27,613		)
Income From Continuing Operations Before Income Taxes	36,686			8,535			56,411			149,649
Income tax expense	16,055			3,128			23,287			53,401
Income From Continuing Operations	20,631			5,407			33,124			96,248
Discontinued Operations, net of tax
Income (loss) from discontinued operations	(3,485		)	(9,027		)	30,435			39,891
Gain (loss) on disposal of discontinued operations	440,105			(15,678		)	439,055			(15,678		)
Income (Loss) From Discontinued Operations	436,620			(24,705		)	469,490			24,213
Net Income (Loss)	$	457,251		$	(19,298	)	$	502,614		$	120,461
Diluted Earnings Per Average Common Share
Continuing operations	$	0.28		$	0.07		$	0.45		$	1.33
Discontinued operations	5.94			(0.34		)	6.41			0.34
Net Income (Loss)	$	6.22		$	(0.27	)	$	6.86		$	1.67
Basic Earnings Per Average Common Share
Continuing operations	$	0.28		$	0.07		$	0.45		$	1.33
Discontinued operations	5.98			(0.34		)	6.45			0.34
Net Income (Loss)	$	6.26		$	(0.27	)	$	6.90		$	1.67
Dividends Per Common Share	$	0.150		$	0.145		$	0.450		$	0.435
Diluted Average Common Shares Outstanding	73,507			72,346			73,238			72,272
Basic Average Common Shares Outstanding	73,093			72,346			72,861			72,220

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

5

ENERGEN CORPORATION
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
(Unaudited)
	Three months ended						Nine months ended
	September 30,						September 30,
(in thousands)	2014			2013			2014			2013
Net Income (Loss)	$	457,251		$	(19,298	)	$	502,614		$	120,461
Other comprehensive income (loss):
Cash flow hedges:
Current period change in fair value of derivative commodity instruments, net of tax of $18, $42, $25, and ($6,669), respectively	29			69			40			(10,882		)
Reclassification adjustment for derivative commodity instruments, net of tax of ($2,277), ($3,205), ($5,997) and ($11,486), respectively	(3,715		)	(5,229		)	(9,784		)	(18,740		)
Current period change in fair value of interest rate swap, net of tax of $0, ($188), ($160) and ($23), respectively	—			(350		)	(298		)	(42		)
Reclassification adjustment for interest rate swap, net of tax of $86, $156, $798 and $449, respectively	161			290			1,482			833
Total cash flow hedges	(3,525		)	(5,220		)	(8,560		)	(28,831		)
Pension and postretirement plans:
Amortization of net benefit obligation at transition, net of tax of ($1), $26, $6 and $77, respectively	(1		)	48			11			143
Amortization of prior service cost, net of tax of $26, $28, $78 and $82, respectively	48			51			144			153
Amortization of net loss, including settlement charges, net of tax of $500, $729, $4,071 and $2,383, respectively	930			1,354			7,561			4,425
Current period change in fair value of pension and postretirement plans, net of tax of $190, $2,238, ($962) and $2,238, respectively	352			4,157			(1,784		)	4,157
Total pension and postretirement plans	1,329			5,610			5,932			8,878
Comprehensive Income (Loss)	$	455,055		$	(18,908	)	$	499,986		$	100,508

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

6

ENERGEN CORPORATION
CONSOLIDATED STATEMENTS OF CASH FLOWS
(Unaudited)
Nine months ended September 30,(in thousands)	2014			2013
Operating Activities
Net income	$	502,614		$	120,461
Income from discontinued operations	(469,490		)	(24,213		)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	399,568			332,247
Asset impairment	179,074			—
Accretion of discount on asset retirement obligations	5,650			5,187
Deferred income taxes	287,855			58,665
Change in derivative fair value	(53,928		)	53,581
(Gain) loss on sale of assets	105			(91		)
Stock-based compensation expense	10,837			11,200
Exploration, including dry holes	10,808			8,759
Discontinued operations	112,180			149,462
Other, net	(1,972		)	10,013
Net change in:
Accounts receivable	(28,486		)	31,051
Inventories	(3,243		)	7,836
Accounts payable	27,967			(58,003		)
Income taxes	(266,229		)	16,061
Pension and other postretirement benefit contributions	(2,397		)	(5,484		)
Other current assets and liabilities	(1,625		)	11,284
Net cash provided by operating activities	709,288			728,016
Investing Activities
Additions to oil and natural gas properties	(906,166		)	(894,713		)
Acquisitions, net of cash acquired	(26,371		)	(21,400		)
Proceeds from sale of Alabama Gas Corporation and other assets	1,347,904			2,382
Purchase of short-term investments	(377,000		)	—
Sale of short-term investments	359,000			—
Discontinued operations	(51,850		)	(54,052		)
Other, net	—			(405		)
Net cash provided by (used in) investing activities	345,517			(968,188		)
Financing Activities
Payment of dividends on common stock	(32,840		)	(31,454		)
Issuance of common stock	23,053			13,680
Reduction of long-term debt	(600,000		)	—
Payment of debt issuance costs	(7,912		)	—
Net change in credit facility	(410,100		)	286,000
Tax benefit on stock compensation	3,873			2,710
Discontinued operations	(35,113		)	(28,055		)
Net cash provided by (used in) financing activities	(1,059,039		)	242,881
Net increase (decrease) in cash and cash equivalents	(4,234		)	2,709
Cash and cash equivalents at beginning of period	5,555			9,704
Cash and cash equivalents at end of period	$	1,321		$	12,413

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

7

ENERGEN CORPORATION

CONDENSED NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

1. ORGANIZATION AND BASIS OF PRESENTATION

Energen Corporation (Energen or the Company) is an oil and natural gas exploration and production company primarily engaged in the exploration, development and production of oil and gas properties in the Permian Basin in west Texas and in the San Juan Basin in New Mexico and Colorado in the continental United States. Our operations are conducted substantially through our subsidiary Energen Resources Corporation (Energen Resources). The unaudited consolidated financial statements and notes should be read in conjunction with the financial statements and notes thereto for the years ended December 31, 2013, 2012 and 2011, included in the 2013 Annual Report of Energen and Alabama Gas Corporation (Alagasco) on Form 10-K.

Prior to September 2, 2014, Energen owned Alagasco, which was engaged in the purchase, distribution and sale of natural gas principally in central and north Alabama. On September 2, 2014, Energen completed the transaction to sell Alagasco to The Laclede Group, Inc. (Laclede) for $1.6 billion, less the assumption of $267 million in debt. The net pre-tax proceeds to Energen totaled approximately $1.32 billion, subject to closing adjustments. This sale had an effective date of August 31, 2014. Energen used cash proceeds from the sale to reduce long-term and short-term indebtedness. During the second quarter of 2014, Energen classified Alagasco as held for sale with prior period comparable and reflected the associated operating results in discontinued operations. See Note 12, Discontinued Operations, for further information regarding the sale of Alagasco.

Our accompanying unaudited consolidated financial statements include Energen and its subsidiaries and have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the disclosures required for complete financial statements. Results of operations for interim periods are not necessarily indicative of the results that may be expected for the year. In the opinion of management, the accompanying financial statements reflect all adjustments necessary to present fairly our financial position, results of operations, and cash flows for the periods and as of the dates shown. Such adjustments consist of normal recurring items. In addition, and in connection with the sale of Alagasco, we have chosen to reformat our financial statements to reflect a presentation more closely aligned with our peers in the oil and natural gas industry. As part of the financial statement reformatting, certain reclassifications were made to conform prior periods’ financial statements to the current-quarter presentation. These reclassifications primarily included further detail under operating costs and expenses. We further reclassified all commodity hedges from oil and natural gas operating revenues to gain (loss) on derivative instruments, net, as follows:

	Three months ended					Nine months ended
	September 30,					September 30,
(in thousands)	2014		2013			2014			2013
Open non-cash mark-to-market gains (losses) on derivative instruments	$	147,287	$	(63,560	)	$	53,985		$	(48,459	)
Closed gains (losses) on derivative instruments	448		(24,632		)	(44,487		)	(3,445		)
Gain (loss) on derivative instruments, net	$	147,735	$	(88,192	)	$	9,498		$	(51,904	)

8

We classified as discontinued operations interest on debt required to be extinguished, certain depreciation costs that ended at close, the related income tax impact of these items and the earnings of Alagasco. In addition, we reclassified from discontinued operations certain general and administrative costs, other income and the related tax impact from these items. The table below provides a detail of these items included in income (loss) from discontinued operations at September 30, 2014:

	Three months ended September 30,						Nine months ended September 30,
(in thousands)	2014			2013			2014			2013
Alagasco net income (loss)	$	(1,767	)	$	(8,961	)	$	40,646		$	37,557
Depreciation, depletion and amortization	(103		)	(150		)	(408		)	(443		)
General and administrative	1,710			1,158			3,337			4,784
Interest expense	(4,329		)	(3,676		)	(17,306		)	(9,786		)
Other income	—			(409		)	(347		)	(882		)
Income tax expense	1,029			1,145			5,567			2,392
Alagasco income (loss) from discontinued operations	(3,460		)	(10,893		)	31,489			33,622
Energen income (loss) from discontinued operations	(25		)	1,866			(1,054		)	6,269
Income (loss) from discontinued operations	$	(3,485	)	$	(9,027	)	$	30,435		$	39,891

2. DERIVATIVE COMMODITY INSTRUMENTS

We periodically enter into derivative commodity instruments to hedge our exposure to price fluctuations on oil, natural gas liquids and natural gas production. Such instruments may include over-the-counter (OTC) swaps and basis swaps typically executed with investment and commercial banks and energy-trading firms. Derivative transactions are pursuant to standing authorizations by the Board of Directors, which do not authorize speculative positions.

Due to the volatility of commodity prices, the estimated fair value of our derivative instruments is subject to fluctuation from period to period, which could result in significant differences between the current estimated fair value and the ultimate settlement price. Additionally, Energen is at risk of economic loss based upon the creditworthiness of our counterparties. We were in a net gain position with thirteen of our active counterparties and in a net loss position with the remaining one at September 30, 2014. The largest counterparty net gain positions at September 30, 2014, J.P. Morgan Ventures Energy Corporation, J Aron & Company and Bank of Montreal, constituted approximately $8.5 million, $4.4 million and $3.7 million, respectively, of Energen’s total gain on fair value of derivatives.

Prior to June 30, 2013, Energen used cash flow hedge accounting where applicable for its derivative transactions. The effective portion of the gain or loss on the derivative instrument was recognized in accumulated other comprehensive income as a component of shareholders’ equity and subsequently reclassified as gain (loss) on derivative instruments, net when the forecasted transaction affected earnings. The ineffective portion of a derivative’s change in fair value was required to be recognized immediately in gain (loss) on derivative instruments, net. All other derivative transactions not designated as cash flow hedge accounting are accounted for as mark-to-market transactions with gains or losses recognized in the period of change in gain (loss) on derivative instruments, net.

Effective March 31, 2013 and June 30, 2013, Energen dedesignated from cash flow hedge accounting 5,078 thousand barrels (MBbl) and 2,353 MBbl, respectively, of various New York Mercantile Exchange (NYMEX) oil contracts associated with the Permian Basin due to lack of correlation. Gains and losses from inception of the hedge to the dedesignation date were frozen in accumulated other comprehensive income until the forecasted transactions actually occurred. Subsequent gains or losses will be accounted for as mark-to-market transactions and recognized immediately through gain (loss) on derivative instruments, net.

Effective June 30, 2013, Energen elected to discontinue the use of cash flow hedge accounting and to dedesignate all remaining derivative commodity instruments that were previously designated as cash flow hedges. As a result of discontinuing hedge accounting, any gains or losses from inception of the hedge to June 30, 2013 were frozen in accumulated other comprehensive income until the forecasted transactions actually occurred. Any subsequent gains or losses will be accounted for as mark-to-market and recognized immediately through gain (loss) on derivative instruments, net. As a result of Energen’s election to discontinue hedge accounting, all derivative transactions entered into subsequent to June 30, 2013 will be accounted for as mark-to-market transactions with gains or losses recognized in the period of change in gain (loss) on derivative instruments, net.

9

The following tables detail the offsetting of derivative assets and liabilities as well as the fair values of derivatives on the balance sheets:

(in thousands)	September 30, 2014
								Gross Amounts Not Offset in the Balance Sheets
	Gross Amounts Recognized at Fair Value		Gross Amounts Offset in the Balance Sheets			Net Amount Presented in the Balance Sheets		Financial Instruments		Cash Collateral Received		Net Fair Value Presented in the Balance Sheets
Derivatives not designated as hedging instruments
Assets
Derivative instruments	$	37,039	$	(6,844	)	$	30,195	$	—	$	—	$	30,195
Noncurrent derivative instruments	6,581		(823		)	5,758		—		—		5,758
Total derivative assets	43,620		(7,667		)	35,953		—		—		35,953
Liabilities
Derivative instruments	7,652		(6,844		)	808		—		—		808
Noncurrent derivative instruments	1,463		(823		)	640		—		—		640
Total derivative liabilities	9,115		(7,667		)	1,448		—		—		1,448
Total derivatives	$	34,505	$	—		$	34,505	$	—	$	—	$	34,505

(in thousands)	December 31, 2013
										Gross Amounts Not Offset in the Balance Sheets
	Gross Amounts Recognized at Fair Value			Gross Amounts Offset in the Balance Sheets			Net Amount Presented in the Balance Sheets			Financial Instruments		Cash Collateral Received		Net Fair Value Presented in the Balance Sheets
Derivatives not designated as hedging instruments
Assets
Derivative instruments	$	36,223		$	(18,760	)	$	17,463		$	—	$	—	$	17,463
Noncurrent derivative instruments	7,992			(2,553		)	5,439			—		—		5,439
Total derivative assets	44,215			(21,313		)	22,902			—		—		22,902
Liabilities
Derivative instruments	49,062			(18,760		)	30,302			—		—		30,302
Noncurrent derivative instruments	2,553			(2,553		)	—			—		—		—
Total derivative liabilities	51,615			(21,313		)	30,302			—		—		30,302
Total derivatives	$	(7,400	)	$	—		$	(7,400	)	$	—	$	—	$	(7,400	)

Energen had a net $2.2 million and a net $8.2 million deferred tax liability included in current deferred income taxes on the balance sheets related to derivative items included in accumulated other comprehensive income as of September 30, 2014, and December 31, 2013, respectively.

10

The following tables detail the effect of derivative commodity instruments in cash flow hedging relationships on the financial statements:

(in thousands)	Location on Statements of Income	Three months ended September 30, 2014		Three months ended September 30, 2013
Net gain recognized in other comprehensive income on derivatives (effective portion), net of tax of $18 and $42	—	$	29	$	69
Gain reclassified from accumulated other comprehensive income into income (effective portion)	Gain (loss) on derivative instruments, net	$	5,992	$	8,455
Loss recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing)	Gain (loss) on derivative instruments, net	$	—	$	(22	)

(in thousands)	Location on Statements of Income	Nine months ended September 30, 2014		Nine months ended September 30, 2013
Net gain (loss) recognized in other comprehensive income on derivatives (effective portion), net of tax of $25 and ($6,669)	—	$	40	$	(10,882	)
Gain reclassified from accumulated other comprehensive income into income (effective portion)	Gain (loss) on derivative instruments, net	$	15,781	$	29,391
Gain recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing)	Gain (loss) on derivative instruments, net	$	—	$	835

The following tables detail the effect of open and closed derivative commodity instruments not designated as hedging instruments on the income statement:

(in thousands)	Location on Statements of Income	Three months ended September 30, 2014		Three months ended September 30, 2013
Gain (loss) recognized in income on derivatives	Gain (loss) on derivative instruments, net	$	141,743	$	(92,313	)

(in thousands)	Location on Statements of Income	Nine months ended September 30, 2014			Nine months ended September 30, 2013
Loss recognized in income on derivatives	Gain (loss) on derivative instruments, net	$	(6,283	)	$	(70,735	)

As of September 30, 2014, $3.6 million, net of tax, of deferred net gains on derivative instruments recorded in accumulated other comprehensive income are expected to be reclassified and reported in earnings as revenues during the next twelve-month period. During 2013, we had a discontinuance of hedge accounting when Energen determined it was probable certain forecasted volumes would not occur due to certain properties being sold. This discontinuance of hedge accounting resulted in $1.7 million of after-tax losses being recognized into gain (loss) on derivative instruments, net during the nine months ended September 30, 2014.

11

As of September 30, 2014, Energen had entered into the following transactions for the remainder of 2014 and subsequent years:

Production Period	Total Hedged Volumes		Average Contract Price	Description
Oil
2014	2,502	MBbl	$92.66 Bbl	NYMEX Swaps
2015	8,280	MBbl	$89.30 Bbl	NYMEX Swaps
Oil Basis Differential
2014	300	MBbl	$(3.30) Bbl	WTS/WTI Basis Swaps*
2014	600	MBbl	$(3.08) Bbl	WTI/WTI Basis Swaps**
2015	2,160	MBbl	$(4.30) Bbl	WTS/WTI Basis Swaps*
2015	6,120	MBbl	$(5.11) Bbl	WTI/WTI Basis Swaps**
Natural Gas Liquids
2014	18.5	MMgal	$0.93 Gal	Liquids Swaps
Natural Gas
2014	2.6	Bcf	$4.57 Mcf	NYMEX Swaps
2014	7.6	Bcf	$4.62 Mcf	Basin Specific Swaps - San Juan
2014	2.6	Bcf	$3.81 Mcf	Basin Specific Swaps - Permian
2015	23.0	Bcf	$4.13 Mcf	Basin Specific Swaps - San Juan
2015	6.0	Bcf	$4.20 Mcf	Basin Specific Swaps - Permian
Natural Gas Basis Differential
2014	1.5	Bcf	$(0.09) Mcf	San Juan Basis Swaps
2014	0.6	Bcf	$(0.17) Mcf	Permian Basis Swaps
*WTS - West Texas Sour/Midland, WTI - West Texas Intermediate/Cushing
**WTI - West Texas Intermediate/Midland, WTI - West Texas Intermediate/Cushing

As of September 30, 2014, the maximum term over which Energen has hedged exposures to the variability of cash flows is through December 31, 2015.

3. FAIR VALUE MEASUREMENTS

Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (exit price). In determining fair value, we use various valuation approaches and classify all assets and liabilities based on the lowest level of input that is significant to the fair value measurement. Observable inputs represent market data obtained from independent sources, whereas unobservable inputs reflect our own considerations about the assumptions other market participants would use in pricing the asset or liability based on the best information available in the circumstances. Assessing the significance of a particular input may require judgment considering factors specific to the asset or liability, and may affect the valuation of the asset or liability and its placement within the fair value hierarchy. The hierarchy is broken down into three levels based on the observability of inputs as follows:

Level 1 - Unadjusted quoted prices in active markets for identical assets or liabilities;

Level 2 - Pricing inputs other than quoted prices in active markets included within Level 1, which are either directly or indirectly observable through correlation with market data as of the reporting date;

Level 3 - Pricing that requires inputs that are both significant and unobservable to the calculation of the fair value measure. The fair value measure represents estimates of the assumptions that market participants would use in pricing the asset or liability. Unobservable inputs are developed based on the best available information and subject to cost-benefit constraints.

No transfers between fair value hierarchy levels occurred during the three months or nine months ended September 30, 2014 or 2013.

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Assets and Liabilities Measured at Fair Value on a Recurring Basis

Energen classifies the fair value of multiple derivative instruments executed under master netting arrangements as net derivative assets and liabilities. The following fair value hierarchy tables present information about Energen’s assets and liabilities measured at fair value on a recurring basis:

	September 30, 2014
(in thousands)	Level 2			Level 3			Total
Assets:
Derivative instruments	$	16,355		$	13,840		$	30,195
Noncurrent derivative instruments	4,763			995			5,758
Total assets	21,118			14,835			35,953
Liabilities:
Derivative instruments	(1,499		)	691			(808		)
Noncurrent derivative instruments	—			(640		)	(640		)
Total liabilities	(1,499		)	51			(1,448		)
Net derivative asset	$	19,619		$	14,886		$	34,505

	December 31, 2013
(in thousands)	Level 2			Level 3			Total
Assets:
Derivative instruments	$	(1,658	)	$	19,121		$	17,463
Noncurrent derivative instruments	4,383			1,056			5,439
Total assets	2,725			20,177			22,902
Liabilities:
Derivative instruments	(28,414		)	(1,888		)	(30,302		)
Total liabilities	(28,414		)	(1,888		)	(30,302		)
Net derivative asset (liability)	$	(25,689	)	$	18,289		$	(7,400	)

Derivative Instruments: The fair value of Energen’s derivative commodity instruments is determined using market transactions and other market evidence whenever possible, including market-based inputs to models and broker or dealer quotations. Our OTC derivative contracts trade in less liquid markets with limited pricing information as compared to markets with actively traded, unadjusted quoted prices; accordingly, the determination of fair value is inherently more difficult. OTC derivatives for which we are able to substantiate fair value through directly observable market prices are classified within Level 2 of the fair value hierarchy. These Level 2 fair values consist of swaps priced in reference to NYMEX oil and natural gas prices. OTC derivatives valued using unobservable market prices have been classified within Level 3 of the fair value hierarchy. These Level 3 fair values include basin specific, basis and natural gas liquids swaps. We consider the frequency of pricing and variability in pricing between sources in determining whether a market is considered active. While Energen does not have access to the specific assumptions used in its counterparties’ valuation models, Energen maintains communications with its counterparties and discusses pricing practices. Further, we corroborate the fair value of our transactions by comparison of market-based price sources.

Energen utilizes a discounted cash flow model in valuing its interest rate derivatives, which are comprised of interest rate swap agreements. The fair value attributable to Energen's interest rate derivative contracts is based on (i) the contracted notional amounts, (ii) active market-quoted London Interbank Offered Rate (LIBOR) yield curves and (iii) the applicable credit-adjusted risk-free rate yield curve.

At September 30, 2014, Energen had interest rate swap agreements with a notional of $150 million. The interest rate swaps exchange a variable interest rate for a fixed interest rate of 1.0425 percent. The fair value of our interest rate swaps was a $1.0 million and a $1.8 million liability at September 30, 2014 and December 31, 2013, respectively, and are classified as Level 2 fair value liabilities. The fair value of our interest rate swaps are recognized on a gross basis in accounts payable on the balance sheets.

Level 3 Fair Value Instruments: Energen prepared a sensitivity analysis to evaluate the hypothetical effect that changes in the prices used to estimate fair value would have on the fair value of its Level 3 instruments. We estimate that a 10 percent increase or decrease in commodity prices would result in an approximate $13 million change in the fair value of open Level 3 derivative contracts.

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The resulting impact upon the results of operations would be an approximate $13 million associated with open Level 3 derivative contracts. Liquidity requirements to meet the obligation would not be significantly impacted as gains and losses on the derivative contracts would be similarly offset by physical sales at the spot market price.

The tables below set forth a summary of changes in the fair value of Energen’s Level 3 derivative commodity instruments as follows:

	Three months ended			Three months ended
(in thousands)	September 30, 2014			September 30, 2013
Balance at beginning of period	$	5,207		$	51,131
Realized gains	10,769			10,852
Unrealized gains (losses) relating to instruments held at the reporting date*	9,348			(10,947		)
Settlements during period	(10,438		)	(9,830		)
Balance at end of period	$	14,886		$	41,206

	Nine months ended			Nine months ended
(in thousands)	September 30, 2014			September 30, 2013
Balance at beginning of period	$	18,289		$	89,019
Realized gains	8,581			41,952
Unrealized losses relating to instruments held at the reporting date*	(3,734		)	(48,835		)
Settlements during period	(8,250		)	(40,930		)
Balance at end of period	$	14,886		$	41,206

*Includes $12.2 million and $9.6 million in mark-to-market gains for the three months and nine months ended September 30, 2014, respectively. Includes $0.8 million and $4.7 million in mark-to-market gains for the three months and nine months ended September 30, 2013, respectively.

The table below sets forth quantitative information about Energen’s Level 3 fair value measurements of derivative commodity instruments as follows:

(in thousands, except price data)	Fair Value as of September 30, 2014			Valuation Technique*	Unobservable Input*	Range
Oil Basis - WTS/WTI
2014	$	1,115		Discounted Cash Flow	Forward Basis	($6.62) Bbl
2015	(181		)	Discounted Cash Flow	Forward Basis	($4.20 - $4.24) Bbl
Oil Basis - WTI/WTI
2014	$	2,736		Discounted Cash Flow	Forward Basis	($7.07 - $7.18) Bbl
2015	(1,979		)	Discounted Cash Flow	Forward Basis	($4.60 - $4.97) Bbl
Natural Gas Liquids
2014	$	1,600		Discounted Cash Flow	Forward Price	$0.67 - $0.90 Gal
Natural Gas Basis - San Juan
2014	$	4,946		Discounted Cash Flow	Forward Basis	($0.05 - $0.12) Mcf
2015	$	5,097		Discounted Cash Flow	Forward Basis	($0.09 - $0.10) Mcf
Natural Gas Basis - Permian
2014	$	(372	)	Discounted Cash Flow	Forward Basis	($0.09 - $0.10) Mcf
2015	$	1,924		Discounted Cash Flow	Forward Basis	($0.13) Mcf

*Discounted cash flow represents an income approach in calculating fair value including the referenced unobservable input and a discount reflecting credit quality of the counterparty.

Financial Instruments not Carried at Fair Value

The stated value of cash and cash equivalents, short-term investments, accounts receivable (net of allowance), and short-term debt approximates fair value due to the short maturity of the instruments. The fair value of Energen’s long-term debt, including the current

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portion, was approximately $637.3 million and $1,161.9 million and had a carrying value of $632.9 million and $1,154.0 million at September 30, 2014 and December 31, 2013, respectively. The fair values are based on market prices of similar debt issues having the same remaining maturities, redemption terms and credit rating. Short-term debt is classified as Level 1 fair value and long-term debt is classified as Level 2 fair value.

4. LONG-TERM DEBT AND NOTES PAYABLE

Long-term debt consisted of the following:

(in thousands)	September 30, 2014		December 31, 2013
Credit facility	$	78,900	$	—
7.40% Medium-term Notes, Series A, due July 24, 2017	2,000		2,000
7.36% Medium-term Notes, Series A, due July 24, 2017	15,000		15,000
7.23% Medium-term Notes, Series A, due July 28, 2017	2,000		2,000
7.32% Medium-term Notes, Series A, due July 28, 2022	20,000		20,000
7.60% Medium-term Notes, Series A, due July 26, 2027	5,000		5,000
7.35% Medium-term Notes, Series A, due July 28, 2027	10,000		10,000
7.125% Medium-term Notes, Series B, due February 15, 2028	100,000		100,000
4.625% Notes, due September 1, 2021	400,000		400,000
Senior Term Loans, (floating rate interest LIBOR plus 1.625%)	—		600,000
	632,900		1,154,000
Less amounts due within one year	—		60,000
Less unamortized debt discount	442		459
Total Energen	$	632,458	$	1,093,541

The aggregate maturities of Energen’s long-term debt outstanding at September 30, 2014 are as follows:

(in thousands)
Remaining 2014	2015	2016	2017	2018	2019 and thereafter
—	—	—	$19,000	—	$613,900

In December 2013, Energen issued $600 million in Senior Term Loans (Senior Term Loans) with a floating interest rate due March 31, 2014 through December 17, 2017. In conjunction with the sale of Alagasco, the Senior Term Loans were repaid in September 2014.

The debt agreements of Energen contain financial and nonfinancial covenants including routine matters such as timely payment of principal and interest, maintenance of corporate existence and restrictions on liens. Although none of the agreements have events of default based on credit ratings, the interest rates applicable to the syndicated credit facility discussed below may adjust based on credit rating changes during certain periods.

Under Energen’s Indenture dated September 1, 1996 with The Bank of New York as Trustee, a cross default provision provides that any debt default of more than $10 million by Energen or Energen Resources will constitute an event of default by Energen. The Indenture does not include a restriction on the payment of dividends.

Credit Facility: On September 2, 2014, Energen entered into a $1.5 billionfive-year syndicated secured credit facility with domestic and foreign lenders. The credit facility has an initial borrowing base of $2.1 billion. This credit facility refinances and replaces the $1.25 billionfive-year syndicated unsecured credit facility entered into on October 30, 2012. Energen’s obligations under the $1.5 billion syndicated credit facility are unconditionally guaranteed by Energen Resources. The current credit facility qualifies for classification as long-term debt on the consolidated balance sheets. The financial covenants of the credit facility require Energen to maintain a ratio of total debt to consolidated income before interest expense, income taxes, depreciation, depletion, amortization, exploration expense and other non-cash income and expenses (EBITDAX) less than or equal to 4.0 to 1.0, to maintain a ratio of

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consolidated current assets (adjusted to include amounts available for borrowings and exclude non-cash derivative instruments) to consolidated current liabilities (adjusted to exclude maturities under the credit facility and non-cash derivative instruments) greater than or equal to 1.0 to 1.0 and, during certain periods, to maintain a ratio of the net present value of proved reserves of our oil and natural gas properties to consolidated total debt greater than or equal to 1.50 to 1.0. We are also bound by covenants which limit our ability to incur additional indebtedness, make certain distributions or alter our corporate structure. Energen may not pay dividends during an event of default, if the payment would result in an event of default or if availability is less than 10 percent of the loan limit under the credit facility. Our credit facility also limits our ability to enter into commodity hedges based on projected production volumes.

Under the credit facility, a cross default provision provides that any debt default of more than $75 million by Energen or Energen Resources will constitute an event of default by Energen.

Upon an uncured event of default under the credit facility, all amounts owing under the credit facility, if any, depending on the nature of the event of default will automatically, or may upon notice by the administrative agent or the requisite lenders thereunder, become immediately due and payable and the lenders may terminate their commitments under the defaulted facility. Energen was in compliance with the terms of its credit facility as of September 30, 2014.

The following is a summary of information relating to Energen’s credit facilities:

(in thousands)	September 30, 2014			December 31, 2013
Notes payable to banks	$	78,900		$	489,000
Available for borrowings	1,421,100			761,000
Total	$	1,500,000		$	1,250,000
Maximum amount outstanding at any month-end	$	750,000		$	901,000
Average daily amount outstanding	$	559,878		$	804,895
Weighted average interest rates based on:
Average daily amount outstanding	1.43		%	1.38		%
Amount outstanding at period-end	1.66		%	1.32		%

Energen’s interest expense was $11.5 million and $27.4 million for the three months and nine months ended September 30, 2014, respectively. Interest expense for Energen was $10.1 million and $30.2 million for the three months and nine months ended September 30, 2013, respectively. Energen had no capitalized interest for the three months ended September 30, 2014. For the nine months ended September 30, 2014, Energen’s total interest expense included capitalized interest of $37,000. Energen had no capitalized interest expense for the three months ended September 30, 2013. Energen’s total interest expense for the nine months ended September 30, 2013 included capitalized interest expense of $0.2 million. At September 30, 2014, Energen paid commitment fees on the unused portion of the available credit facilities at a current annual rate of 30 basis points. See Note 1, Organization and Basis of Presentation, for further information regarding interest on debt required to be extinguished, associated with the sale of Alagasco, which was classified to discontinued operations.

5. RECONCILIATION OF EARNINGS PER SHARE (EPS)

	Three months ended					Three months ended
(in thousands, except per share amounts)	September 30, 2014					September 30, 2013
	Net			Per Share		Net				Per Share
	Income		Shares	Amount		Income			Shares	Amount
Basic EPS	$	457,251	73,093	$	6.26	$	(19,298	)	72,346	$	(0.27	)
Effect of dilutive securities
Stock options			231						—
Non-vested restricted stock			68						—
Performance share awards			115						—
Diluted EPS	$	457,251	73,507	$	6.22	$	(19,298	)	72,346	$	(0.27	)

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In periods of loss, shares that otherwise would have been included in diluted average common shares outstanding are excluded. The Company had 242,560 of excluded shares for the three months ended September 30, 2013.

	Nine months ended					Nine months ended
(in thousands, except per share amounts)	September 30, 2014					September 30, 2013
	Net			Per Share		Net			Per Share
	Income		Shares	Amount		Income		Shares	Amount
Basic EPS	$	502,614	72,861	$	6.90	$	120,461	72,220	$	1.67
Effect of dilutive securities
Stock options			219					41
Non-vested restricted stock			67					10
Performance share awards			91					1
Diluted EPS	$	502,614	73,238	$	6.86	$	120,461	72,272	$	1.67

Energen had the following shares that were excluded from the computation of diluted EPS, as inclusion would be anti-dilutive:

	Three months ended September 30,		Nine months ended September 30,
(in thousands)	2014	2013	2014	2013
Stock options	6	—	6	875
Performance share awards	2	—	4	79

6. STOCK COMPENSATION

Stock Incentive Plan

Stock Options: The Stock Incentive Plan provides for the grant of incentive stock options and non-qualified stock options to officers and key employees. Options granted under the Stock Incentive Plan provide for the purchase of Energen common stock at not less than the fair market value on the date the option was granted. The sale or transfer of the shares is limited during certain periods. All outstanding options vest within three years from date of grant and expire 10 years from the grant date. Energen granted 107,868 non-qualified option shares during the first quarter of 2014 with a grant-date fair value of $27.57. During the second quarter of 2014, Energen granted 2,439 non-qualified option shares with a grant-date fair value of $32.22.

Restricted Stock: Additionally, the Stock Incentive Plan provides for the grant of restricted stock units. In January 2014, Energen awarded 41,664 restricted stock units with a grant-date fair value of $70.68. Energen granted 928 restricted stock units during the second quarter of 2014 with a grant-date fair value of $79.15. These awards have a three year vesting period. Energen also granted 6,312 restricted stock units during the second quarter of 2014 with a grant-date fair value of $78.99 and a two year graded vesting period. These awards were valued based on the quoted market price of Energen’s common stock at the date of grant.

Performance Share Awards: The Stock Incentive Plan also provides for the grant of performance share awards, with each unit equal to the market value of one share of common stock, to eligible employees based on predetermined Company performance criteria at the end of an award period. The Stock Incentive Plan provides that payment of earned performance share awards be made in the form of Energen common stock. Performance share awards are valued using the Monte Carlo model which uses historical volatility and other variables to estimate the probability of satisfying the market condition of the award. Energen granted 287 performance share awards during the first quarter of 2014 with a two year vesting period and a grant-date fair value of $118.99. Energen also granted 63,842 performance share awards during the first quarter of 2014 with a three year vesting period and a grant-date fair value of $93.13. During the second quarter of 2014, Energen granted 650 performance share awards with a two year vesting period and a grant-date fair value of $137.11. Energen also granted 1,467 performance share awards during the second quarter of 2014 with a three year vesting period and a grant-date fair value of $109.02.

Stock Appreciation Rights Plan

The Stock Appreciation Rights Plan provides for the payment of cash incentives measured by the long-term appreciation of Energen common stock. These awards are liability awards which settle in cash and are remeasured each reporting period until settlement and

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have a three year vesting period. Energen granted 62,749 awards during the first quarter of 2014. These awards had a fair value of $28.71 as of September 30, 2014.

Petrotech Incentive Plan

The Petrotech Incentive Plan provides for the grant of stock equivalent units. These awards are liability awards which settle in cash and are remeasured each reporting period until settlement. During the first quarter of 2014, Energen awarded 28,840 Petrotech units with a fair value of $72.06 as of September 30, 2014, none of which included a market condition. Also awarded were 36,920 Petrotech units which included a market condition and had a fair value of $94.38 as of September 30, 2014. These awards have a three year vesting period. During the third quarter of 2014, Energen Resources awarded 9,728 Petrotech units with a three-year vesting period and a fair value of $72.06 as of September 30, 2014, and 596 Petrotech units with a twenty-month vesting period and a fair value of $72.14 as of September 30, 2014, none of which included a market condition.

Stock Repurchase Program

During the three months and nine months ended September 30, 2014, Energen had non-cash purchases of approximately $36,000 and $0.4 million, respectively, of Energen common stock in conjunction with tax withholdings on our non-qualified deferred compensation plan and other stock compensation. Energen utilized internally generated cash flows in payment of the related tax withholdings.

7. EMPLOYEE BENEFIT PLANS

In October 2014, Energen’s Board of Directors elected to freeze and terminate its qualified defined benefit pension plan. A plan amendment adopted in October 2014 closes the plan to new entrants, effective November 1, 2014, and freezes benefit accruals after December 31, 2014. Energen intends to terminate the plan on January 31, 2015. We anticipate distributing benefits under the plan in late 2015 or early 2016 pending receipt of a determination letter from the Internal Revenue Service and completion of certain administrative actions.

The Company’s non-qualified supplemental retirement plans will also be amended to terminate effective December 31, 2014. Distributions under the plans are subject to certain payment restrictions under the Internal Revenue Code and Treasury regulations and payments to plan participants will be made in each of the first quarters of 2015 and 2016. In connection with the termination of these plans, the Company has also reclassified approximately $17.1 million as of September 30, 2014 of its investment in a Rabbi Trust from other long term assets to prepayments and other assets in the accompanying balance sheets to reflect its intent to utilize these assets to fund the estimated payments in the first quarter of 2015.

In October 2014, Energen’s Board of Directors amended and restated the Employee Saving Plan to make certain benefit design changes effective January 1, 2015. The benefit design changes are expected to include an increase in the percentage of Company match and other contributions.

Effective April 30, 2014, Energen Corporation separated one of its defined benefit non-contributory pension plans into an Energen and an Alagasco plan reflecting the separation of assets and obligations in accordance with ERISA provisions. Energen remeasured our plans using current assumptions.

The components of net periodic benefit cost for Energen’s defined benefit non-contributory pension plan and certain nonqualified supplemental pension plans were as follows:

	Three months ended September 30,						Nine months ended September 30,
(in thousands)	2014			2013			2014			2013
Components of net periodic benefit cost:
Service cost	$	1,902		$	1,326		$	5,157		$	3,980
Interest cost	1,157			1,093			3,974			3,269
Expected long-term return on assets	(1,157		)	(1,321		)	(4,067		)	(3,966		)
Actuarial loss	1,296			1,760			4,115			5,417
Prior service cost amortization	63			62			177			185
Settlement charge	370			18			4,043			161
Net periodic expense	$	3,631		$	2,938		$	13,399		$	9,046

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Energen is required to make approximately $7.7 million in contributions for 2014 to the qualified pension plans. This estimate includes required contributions for the Alagasco pension plans through August 31, 2014. In January 2014, we made a $3.0 million contribution and have utilized funding credits, as established under Internal Revenue Code Section 430(f), to meet the remaining required funding. We also made an additional discretionary contribution of $10 million to the Energen qualified pension plan in October 2014. We do not anticipate that the funded status of the qualified pension plans will fall below statutory thresholds requiring accelerated funding or constraints on benefit levels or plan administration. We may also make additional discretionary contributions to the qualified pension plan depending on the amount and timing of employee retirements and market conditions. For the three months and nine months ended September 30, 2014, Energen made benefit payments aggregating $74,000 and $1.0 million, respectively, to retirees from the non-qualified supplemental retirement plans and expects to make additional benefit payments of approximately $5.2 million through the remainder of 2014. In the third quarter of 2014, Energen incurred a settlement charge of $26,000 for the payment of lump sums from the non-qualified supplemental retirement plans. Also in the third quarter of 2014, Energen incurred settlement charges of $0.3 million for the payment of lump sums from the qualified defined benefit pension plan. In the second quarter of 2014, Energen incurred settlement charges of $0.4 million for the payment of lump sums from the qualified defined benefit pension plans. In the first quarter of 2014, Energen incurred settlement charges of $6.9 million for the payment of lump sums from the qualified defined benefit pension plans of which $3.7 million is included in discontinued operations. Also in the first quarter of 2014, Energen incurred a settlement charge of $0.4 million for the payment of lump sums from the non-qualified supplemental retirement plans. In the third quarter of 2013, Energen incurred a settlement charge of $18,000 for the payment of lump sums from the non-qualified supplemental retirement plans. In the first quarter of 2013, Energen incurred a settlement charge of $0.1 million for the payment of lump sums from the non-qualified supplemental retirement plans.

Also effective April 30, 2014, Energen Corporation separated its postretirement health care and life insurance benefit plans into separate plans established for Energen and Alagasco employees in accordance with ERISA provisions. Energen remeasured our plan using current assumptions.

The components of net periodic postretirement benefit expense for Energen’s postretirement benefit plan were as follows:

	Three months ended September 30,						Nine months ended September 30,
(in thousands)	2014			2013			2014			2013
Components of net periodic benefit cost:
Service cost	$	87		$	111		$	206		$	334
Interest cost	137			175			587			526
Expected long-term return on assets	(246		)	(212		)	(1,016		)	(638		)
Actuarial gain	(151		)	—			(572		)	—
Transition amortization	9			63			39			189
Net periodic (income) expense	$	(164	)	$	137		$	(756	)	$	411

There are no required contributions to the postretirement benefit plan during 2014.

8. COMMITMENTS AND CONTINGENCIES    

Commitments and Agreements: Under various agreements for third-party gathering, treatment, transportation or other services, Energen is committed to deliver minimum production volumes or to pay certain costs in the event the minimum quantities are not delivered. These delivery commitments are approximately 6 million barrels of oil equivalent (MMBOE) through September 2017.

Legal Matters: Energen and its affiliates are, from time to time, parties to various pending or threatened legal proceedings and we have accrued a provision for our estimated liability. Certain of these lawsuits include claims for punitive damages in addition to other specified relief. We recognize a liability for contingencies when information available indicates both a loss is probable and the amount of the loss can be reasonably estimated. Based upon information presently available, and in light of available legal and other defenses, contingent liabilities arising from threatened and pending litigation are not considered material in relation to the respective financial positions of Energen and its affiliates. It should be noted, however, that there is uncertainty in the valuation of pending claims and prediction of litigation results.

Energen Resources previously disclosed an adverse judgment relating to the ownership of the Company operated Cadenhead 25-1 Well (the Cadenhead Well) in Ward County, Texas. Upon a Motion to Reconsider, the adverse judgment was vacated by the District

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Court in Ward County, Texas and a Summary Judgment Order dated July 30, 2013 was entered confirming Energen Resources’ superior title to the Cadenhead Well and its associated oil and gas leases. The Summary Judgment Order has been affirmed by the Court of Appeals for the Eighth District of Texas.

Environmental Matters: Various environmental laws and regulations apply to the operations of Energen and Energen Resources. Historically, the cost of environmental compliance has not materially affected our financial position, results of operations or cash flows. New regulations, enforcement policies, claims for damages or other events could result in significant unanticipated costs.

Under oversight of the Site Remediation Section of the Railroad Commission of Texas, Energen Resources is currently in the process of cleanup and remediation of oil and gas wastes in nine reserve pits in Mitchell County, Texas. We estimate that the cleanup, remediation and related costs will approximate $4.1 million of which $3.4 million has been incurred.

During January 2014, Energen Resources responded to a General Notice and Information Request from the Environmental Protection Agency regarding the Reef Environmental Site in Sylacauga, Talladega County, Alabama. The letter identifies Energen Resources as a potentially responsible party under The Comprehensive Environmental Response, Compensation, and Liability Act for the cleanup of the Site. In 2008, Energen hired a third party to transport approximately 3,000 gallons of non-hazardous wastewater to Reef Environmental for wastewater treatment. Reef Environmental ceased operating its wastewater treatment system in 2010. Due to its one time use of Reef Environmental for a small volume of non-hazardous wastewater, Energen Resources has not accrued a liability for cleanup of the Site.

New Mexico Audits: In 2011, Energen Resources received an Order to Perform Restructured Accounting and Pay Additional Royalties (the Order), following an audit performed by the Taxation and Revenue Department (the Department) of the State of New Mexico on behalf of the Office of Natural Resources Revenue (ONRR), of federal oil and gas leases in New Mexico. The audit covered periods from January 2004 through December 2008 and included a review of the computation and payment of royalties due on minerals removed from specified U.S. federal leases. The Order addressed ONRR’s efforts to change accounting and reporting practices, and to unbundle fees charged by third parties that gather, compress and transport natural gas production. ONRR now maintains that all or some of such fees are not deductible.

Energen Resources appealed the Orderin 2011 and in July 2012, on a motion from ONRR, the Orderwas remanded. In August 2014, ONRR issued its Revised Order that is now under appeal. In the Revised Order, ONRR has ordered that Energen pay additional royalties on production from certain federal leases in the amount of $129,700. Energen estimates that application of the Revised Order to all of the Company’s federal leases would result in ONRR claims up to approximately $23 million, plus interest and penalties from 2004 forward. ONRR began implementing its unbundling initiative in 2010, but seeks to implement its revisions retroactively, despite the fact that they conflict with previous audits, allowances and industry practice. Energen continues to vigorously contest the Revised Order and the findings. Management is unable, at this time, to determine a range of reasonably possible losses, and no amount has been accrued as of September 30, 2014.

9. EXPLORATORY COSTS

Energen capitalizes exploratory drilling costs until a determination is made that the well or project has either found proved reserves or is impaired. After an exploratory well has been drilled and found oil and natural gas reserves, a determination may be pending as to whether the oil and natural gas quantities can be classified as proved. In those circumstances, Energen continues to capitalize the drilling costs pending the determination of proved status if (i) the well has found a sufficient quantity of reserves to justify its completion as a producing well and (ii) Energen is making sufficient progress assessing the reserves and the economic and operating viability of the project. Capitalized exploratory drilling costs are presented in unproved properties in the balance sheets. If the exploratory well is determined to be impaired, the impaired costs are charged to exploration expense. Other exploration costs, including geological and geophysical costs, are expensed as incurred.

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The following table sets forth capitalized exploratory well costs and includes additions pending determination of proved reserves, reclassifications to proved reserves and costs charged to expense:

	Three months ended September 30,						Nine months ended September 30,
(in thousands)	2014			2013			2014			2013
Capitalized exploratory well costs at beginning of period	$	166,458		$	72,172		$	57,600		$	79,791
Additions pending determination of proved reserves	258,724			99,428			623,913			319,008
Reclassifications due to determination of proved reserves	(258,123		)	(112,821		)	(513,263		)	(340,020		)
Exploratory well costs charged to expense	(1,217		)	—			(2,408		)	—
Capitalized exploratory well costs at end of period	$	165,842		$	58,779		$	165,842		$	58,779

The following table sets forth capitalized exploratory wells costs and includes amounts capitalized for a period greater than one year:

(in thousands)	September 30, 2014		December 31, 2013
Exploratory wells in progress	$	29,059	$	14,794
Capitalized exploratory well costs capitalized for a period of one year or less	136,783		42,481
Capitalized exploratory well costs for a period greater than one year	—		1,206
Total capitalized exploratory well costs	$	165,842	$	58,481

At September 30, 2014, Energen had 56 gross exploratory wells either drilling or waiting on results from completion and testing. These wells are located primarily in the Permian Basin.

10. ASSET RETIREMENT OBLIGATIONS

Energen’s asset retirement obligations (ARO) primarily relate to the future plugging, abandonment and reclamation of wells and facilities. We recognize a liability for the fair value of the ARO in the periods incurred. The ARO fair value liability is determined by calculating the present value of the estimated future cash outflows we expect to incur to plug, abandon and reclaim our producing properties at the end of their productive lives, and is recognized on a discounted basis incorporating an estimate of performance risk specific to Energen. Subsequent to initial measurement, liabilities are accreted to their present value and capitalized costs are depreciated over the estimated useful lives of the related assets. Upon settlement of the liability, Energen may recognize a gain or loss for differences between estimated and actual settlement costs.

The following table reflects the components of the change in Energen’s ARO balance for the nine months ended September 30, 2014:

(in thousands)
Balance as of December 31, 2013	$	108,533
Liabilities incurred	2,265
Liabilities settled	(1,017		)
Accretion expense	5,650
Balance as of September 30, 2014	$	115,431

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11. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

The following table provides changes in the components of accumulated other comprehensive income (loss), net of the related income tax effects.

(in thousands)	Cash Flow Hedges			Pension and Postretirement Plans			Total
Balance as of December 31, 2013	$	12,178		$	(32,245	)	$	(20,067	)
Other comprehensive loss before reclassifications	(258		)	(1,784		)	(2,042		)
Amounts reclassified from accumulated other comprehensive income (loss)	(8,302		)	7,716			(586		)
Change in accumulated other comprehensive income (loss)	(8,560		)	5,932			(2,628		)
Balance as of September 30, 2014	$	3,618		$	(26,313	)	$	(22,695	)

The following table provides details of the reclassifications out of accumulated other comprehensive income (loss).

	Three months ended			Three months ended
	September 30, 2014			September 30, 2013
(in thousands)	Amounts Reclassified						Line Item Where Presented
Gains (losses) on cash flow hedges:
Commodity contracts	$	5,992		$	8,433		Gain (loss) on derivative instruments, net
Interest rate swap	(247		)	(446		)	Interest expense
Total cash flow hedges	5,745			7,987
Income tax expense	(2,191		)	(3,048		)
Net of tax	3,554			4,939
Pension and postretirement plans:
Transition obligation	2			(74		)	General and administrative
Prior service cost	(74		)	(78		)	General and administrative
Actuarial losses*	(1,060		)	(2,036		)	General and administrative
Actuarial losses on settlement charges	(370		)	—			General and administrative
Actuarial losses on settlement charges*	—			(46		)	Assets held for sale with prior period comparable
Total pension and postretirement plans	(1,502		)	(2,234		)
Income tax expense	525			783
Net of tax	(977		)	(1,451		)
Total reclassifications for the period	$	2,577		$	3,488

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	Nine months ended			Nine months ended
	September 30, 2014			September 30, 2013
(in thousands)	Amounts Reclassified						Line Item Where Presented
Gains (losses) on cash flow hedges:
Commodity contracts	$	15,781		$	30,226		Gain (loss) on derivative instruments, net
Interest rate swap	(2,280		)	(1,282		)	Interest expense
Total cash flow hedges	13,501			28,944
Income tax expense	(5,199		)	(11,037		)
Net of tax	8,302			17,907
Pension and postretirement plans:
Transition obligation	(17		)	(220		)	General and administrative
Prior service cost	(222		)	(235		)	General and administrative
Actuarial losses*	(3,640		)	(6,387		)	General and administrative
Actuarial losses on settlement charges	(7,992		)	—			General and administrative
Actuarial losses on settlement charges*	—			(421		)	Assets held for sale with prior period comparable
Total pension and postretirement plans	(11,871		)	(7,263		)
Income tax expense	4,155			2,542
Net of tax	(7,716		)	(4,721		)
Total reclassifications for the period	$	586		$	13,186

* In the first quarter of 2013, Energen incurred a settlement charge of $0.5 million for the payment of lump sums from the nonqualified supplemental retirement plans, of which $0.1 million was recognized in actuarial losses above and $0.4 million was recognized as a regulatory asset at Alagasco and reported in actuarial losses on settlement charges above. In the third quarter of 2013, Energen incurred a settlement charge of $64,000 for the payment of lump sums from the nonqualified supplemental retirement plans, of which $18,000 is recognized in actuarial losses above and $46,000 was recognized as a regulatory asset at Alagasco and reported in actuarial losses on settlement charges above.

12. DISCONTINUED OPERATIONS

On September 2, 2014, Energen completed the transaction to sell Alagasco to Laclede for $1.6 billion, less the assumption of $267 million in debt. The net pre-tax proceeds to Energen totaled approximately $1.32 billion, subject to closing adjustments. This sale has an effective date of August 31, 2014. Energen used cash proceeds from the sale to reduce long-term and short-term indebtedness. During the second quarter of 2014, Energen classified Alagasco as held for sale with prior period comparable and reflected the associated operating results in discontinued operations. Energen’s results of operations for the three months and nine months ended September 30, 2014 and 2013 and our financial position as of September 30, 2014 and December 31, 2013 presented in our unaudited consolidated financial statements and these notes reflect Alagasco as discontinued operations.

In March 2014, Energen completed the sale of its North Louisiana/East Texas natural gas and oil properties for $30.3 million (subject to closing adjustments). The sale had an effective date of December 1, 2013, and the proceeds from the sale were used to repay short-term obligations. During the third quarter of 2013, Energen classified these natural gas and oil properties as held for sale and reflected the associated operating results in discontinued operations. Energen recognized a non-cash impairment writedown on these properties in the first quarter of 2014 of $1.7 million pre-tax to adjust the carrying amount of these properties to their fair value based on an estimate of the selling price of the properties. This non-cash impairment writedown is reflected in loss on disposal of discontinued operations in the nine months ended September 30, 2014. Energen also recognized non-cash impairment writedowns on these properties in the third and fourth quarters of 2013 of $24.6 million pre-tax and $5.2 million pre-tax, respectively. Significant assumptions in valuing the proved reserves included the reserve quantities, anticipated operating costs, anticipated production taxes, future expected natural gas prices and basis differentials, anticipated production declines, and a discount rate of 10 percent commensurate with the risk of the underlying cash flow estimates. The impairment writedowns are classified as Level 3 fair value. At December 31, 2013, proved reserves associated with Energen’s North Louisiana/East Texas properties totaled 23 Bcf of natural gas and 91 MBbl of oil.

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In October 2013, Energen completed the sale of its Black Warrior Basin coalbed methane properties in Alabama for $160 million (subject to closing adjustments). Energen recorded a pre-tax gain on the sale of approximately $35 million in the fourth quarter of 2013 which was reflected in gain on disposal of discontinued operations in the year ended December 31, 2013. The sale had an effective date of July 1, 2013, and the proceeds from the sale were used to repay short-term obligations. The property was classified as held for sale and reflected in discontinued operations during the third quarter of 2013. At December 31, 2012, proved reserves associated with Energen’s Black Warrior Basin properties totaled 97 Bcf of natural gas.

The following table details held for sale properties by major classes of assets and liabilities:

(in thousands)	December 31, 2013
	Alabama Gas Corporation			Black Warrior Basin			North Louisiana/East Texas			Total
Cash	$	3,032		$	—		$	—		$	3,032
Accounts receivable*	103,748			2,829			1,272			107,849
Inventories	41,200			—			68			41,268
Oil and gas properties	—			—			348,379			348,379
Less accumulated depreciation, depletion and amortization	—						(301,609		)	(301,609		)
Utility plant	1,491,433			—			—			1,491,433
Less accumulated depreciation	(605,924		)	—			—			(605,924		)
Other property, net	41			—			165			206
Other current assets*	29,458			—			—			29,458
Other long-term assets	128,780			—			—			128,780
Total assets held for sale	1,191,768			2,829			48,275			1,242,872
Accounts payable	(48,653		)	(1,732		)	(11		)	(50,396		)
Royalty payable	—			(550		)	(869		)	(1,419		)
Accrued taxes	(28,027		)	—			—			(28,027		)
Notes payable to banks	(50,000		)	—			—			(50,000		)
Other current liabilities*	(105,013		)	(379		)	(21		)	(105,413		)
Other long-term liabilities	(331,409		)	—			(14,983		)	(346,392		)
Long-term debt	(249,923		)	—			—			(249,923		)
Total liabilities held for sale	(813,025		)	(2,661		)	(15,884		)	(831,570		)
Total net assets held for sale	$	378,743		$	168		$	32,391		$	411,302

*At December 31, 2013, Alagasco’s accounts receivable included a consolidating adjustment of $4.7 million to adjust for affiliated companies receivables. Certain other current assets and other current liabilities at Alagasco of $1.6 million and $0.5 million, respectively, were reclassified to continuing operations at Energen.

We recognized interest on debt required to be extinguished in connection with the sale of Alagasco as discontinued operations. On September 2, 2014, Energen entered into a $1.5 billionfive-year syndicated secured credit facility with domestic and foreign lenders. This credit facility refinances and replaces the $1.25 billionfive-year syndicated unsecured credit facilities entered into on October 30, 2012. The interest associated with the October 2012 five-year syndicated unsecured credit facilities was classified as discontinued operations. See Note 1, Organization and Basis of Presentation, for further information regarding adjustments associated with the sale of Alagasco.

Gains and losses on the sale of certain oil and natural gas properties as well as any impairments of properties held for sale are reported as discontinued operations, with income or loss from operations of the associated assets reported as income or loss from discontinued operations. The results of operations for certain held for sale assets were reclassified and reported as discontinued operations for all prior periods presented. Energen may, in the ordinary course of business, be involved in the sale of developed or undeveloped properties. All assets held for sale are reported at the lower of the carrying amount or fair value.

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	Three months ended						Nine months ended
	September 30,						September 30,
(in thousands, except per share data)	2014			2013			2014		2013
Natural gas distribution revenues	$	39,874		$	48,368		$	397,648	$	390,567
Oil and natural gas revenues	6			18,258			5,217		55,483
Total revenues	$	39,880		$	66,626		$	402,865	$	446,050
Pretax income (loss) from discontinued operations	$	(5,938	)	$	(14,677	)	$	48,581	$	64,098
Income tax expense (benefit)	(2,453		)	(5,650		)	18,146		24,207
Income (Loss) From Discontinued Operations	$	(3,485	)	$	(9,027	)	$	30,435	$	39,891
Gain (loss) on disposal of discontinued operations	$	726,410		$	(24,612	)	$	724,743	$	(24,612	)
Income tax expense (benefit)	286,305			(8,934		)	285,688		(8,934		)
Gain (Loss) on Disposal of Discontinued Operations	$	440,105		$	(15,678	)	$	439,055	$	(15,678	)
Total Income (Loss) From Discontinued Operations	$	436,620		$	(24,705	)	$	469,490	$	24,213
Diluted Earnings Per Average Common Share
Income (loss) from discontinued operations	$	(0.05	)	$	(0.12	)	$	0.42	$	0.55
Gain (loss) on disposal of discontinued operations	5.99			(0.22		)	5.99		(0.21		)
Total Income (Loss) From Discontinued Operations	$	5.94		$	(0.34	)	$	6.41	$	0.34
Basic Earnings Per Average Common Share
Income (loss) from discontinued operations	$	(0.05	)	$	(0.12	)	$	0.42	$	0.55
Gain (loss) on disposal of discontinued operations	6.03			(0.22		)	6.03		(0.21		)
Total Income (Loss) From Discontinued Operations	$	5.98		$	(0.34	)	$	6.45	$	0.34

13. ACQUISITION AND DISPOSITION OF PROPERTIES

During the third quarter of 2014, Energen recognized a non-cash impairment writedown on certain properties in the Permian Basin of $31.2 million pre-tax to adjust the carrying amount of these properties to their fair value based on expected future discounted cash flows in anticipation of being designated as held for sale. This non-cash impairment writedown is reflected in asset impairment on the consolidated income statement.

During the third quarter of 2014, a non-cash impairment writedown of $147.9 million pre-tax was recognized by Energen on certain gas properties in the San Juan Basin to adjust the carrying amount of these properties to their fair value based on expected future discounted cash flows in anticipation of being designated as held for sale. This non-cash impairment writedown is reflected in asset impairment on the consolidated income statement. At December 31, 2013, proved reserves associated with Energen’s San Juan Basin properties totaled 73,070 MBOE.

In October 2014, Energen purchased approximately 15,000 net acres of unproved leasehold in the Mancos formation oil play in the San Juan Basin for $22.8 million.

14. RECENTLY ISSUED ACCOUNTING STANDARDS

In April 2014, the Financial Accounting Standards Board issued Accounting Standards Update (ASU) No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. This update defines a discontinued operation as a disposal of a component or a group of components that is disposed of or is classified as held for sale and represents a strategic shift that has (or will have) a major effect on an entity’s operations and financial results. The amendment is effective for all annual periods beginning on or after December 15, 2014, and interim periods within those annual periods. Energen is currently evaluating the impact of the adoption of this ASU on its classification of future dispositions as discontinued operations.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

OVERVIEW OF BUSINESS

Energen Corporation (Energen or the Company) is an oil and gas exploration and production company primarily engaged in the exploration, development and production of oil and gas properties in the Permian Basin in west Texas and in the San Juan Basin in New Mexico and Colorado in the continental United States. Our operations are conducted substantially through our subsidiary Energen Resources Corporation (Energen Resources).

Our strategy is to grow our oil and gas operations largely through the acquisition, exploration and development of proved and unproved reserves with exploration primarily focused in and around the basins in which we operate. Energen focuses on increasing production and reserves through development well drilling, exploration, behind-pipe recompletions, pay-adds, workovers, secondary recovery and operational enhancements. We prefer to operate our properties in order to better control the nature and pace of drilling and development activities. All oil, natural gas liquids and natural gas production is sold to third parties. Energen also provides operating services in the Permian and San Juan basins for its joint interests. These services include overall project management and day-to-day decision-making relative to project operations.

FINANCIAL AND OPERATING PERFORMANCE

Overview of Third Quarter and Year-to-Date 2014 Results and Activities

During the third quarter of 2014 as compared to the same period in the prior year, we:

• increased production volumes from continuing operations by 8.7 percent;

• expanded our activities in the Permian Basin by increasing production by 586 MBOE;

• recognized a non-cash impairment on certain oil properties in the Permian Basin of $31.2 million pre-tax;

• recognized a non-cash impairment on certain gas properties in the San Juan Basin of $147.9 million pre-tax and

• completed the transaction to sell Alabama Gas Corporation (Alagasco) to The Laclede Group, Inc. (Laclede) on September 2, 2014.

During the nine months ended September 30, 2014 as compared to the same period in the prior year, we:

• increased revenues from the sale of oil, natural gas liquids and natural gas by 14 percent;

• increased production volumes from continuing operations by 10.1 percent and

• expanded our activities in the Permian Basin by increasing production 2,274 MBOE.

Quarter ended September 30, 2014 vs quarter ended September 30, 2013

Energen had net income of $457.3 million ($6.22 per diluted share) for the three months ended September 30, 2014 as compared with a net loss of $19.3 million ($0.27 per diluted share) for the same period in the prior year. In the third quarter of 2014, our income from continuing operations totaled $20.6 million ($0.28 per diluted share) as compared with income from continuing operations of $5.4 million ($0.07 per diluted share) in the same period a year ago. Income from discontinued operations for the current quarter was $436.6 million ($5.94 per diluted share) as compared with a loss of $24.7 million ($0.34 per diluted share) from the prior-year third quarter largely due to the sale of Alagasco. This increase in income from continuing operations was primarily the result of:

• year-over-year after-tax $133.8 million gain on open derivatives (resulting from an after-tax $94.1 million non-cash gain on open derivatives for the third quarter of 2014 and an after-tax $39.7 million non-cash loss on open derivatives for the third quarter of 2013);

• higher oil, natural gas liquids and natural gas production volumes (approximately $20.8 million after-tax);

• gain on closed derivatives (approximately $15.4 million after-tax);

• higher realized natural gas commodity prices (approximately $4.7 million after-tax) and

• decreased general and administrative expense (approximately $1.9 million after-tax)

partially offset by:

• lower realized oil and natural gas liquids commodity prices (approximately $31.5 million after-tax);

• a non-cash impairment on certain oil properties in the Permian Basin (approximately $19.8 million after-tax);

• a non-cash impairment on certain gas properties in the San Juan Basin (approximately $94.1 million after-tax);

• higher depreciation, depletion and amortization (DD&A) expense (approximately $8.7 million after-tax);

26

• higher production and ad valorem taxes (approximately $2.2 million after-tax) and

• higher oil, natural gas liquids and natural gas production expense (approximately $1.2 million after-tax).

Nine months ended September 30, 2014 vs nine months ended September 30, 2013

For the 2014 year-to-date, Energen’s net income totaled $502.6 million ($6.86 per diluted share) as compared to net income of $120.5 million ($1.67 per diluted share) for the same period in the prior year. For the nine months ended September 30, 2014, our income from continuing operations totaled $33.1 million ($0.45 per diluted share) as compared with income from continuing operations of $96.2 million ($1.33 per diluted share) in the same period a year ago. Discontinued operations generated income for the current year-to-date period of $469.5 million ($6.41 per diluted share) as compared with income of $24.2 million ($0.34 per diluted share) from the same period a year ago largely due to the sale of Alagasco. The decrease in income from continuing operations was primarily the result of:

• decreased realized oil commodity prices (approximately $12.8 million after-tax);

• a non-cash impairment on certain oil properties in the Permian Basin (approximately $19.8 million after-tax);

• a non-cash impairment on certain gas properties in the San Juan Basin (approximately $94.1 million after-tax);

• higher DD&A expense (approximately $42.4 million after-tax);

• loss on closed derivatives (approximately $25.9 million after-tax);

• increased production and ad valorem taxes (approximately $7.6 million after-tax);

• increased exploration expense (approximately $6.1 million after-tax);

• increased oil, natural gas liquids and natural gas production expense (approximately $5.6 million after-tax) and

• higher general and administrative expense (approximately $4.3 million after-tax)

partially offset by:

• year-over-year after-tax $65.2 million gain on open derivatives (resulting from an after-tax $34.5 million non-cash gain on open derivatives for the first nine months of 2014 and an after-tax $30.7 million non-cash loss on open derivatives for the first nine months of 2013);

• higher production volumes (approximately $68.2 million after-tax) and

• increased realized natural gas liquids and natural gas commodity prices (approximately $26.3 million after-tax).

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2014 Outlook

2014 Capital Budget: In the 2014 year-to-date, Energen has incurred approximately $951.0 million on its oil and natural gas capital and expects the total for 2014 to approximate $1.4 billion, primarily all of which is for existing properties. Capital expenditures by area and targeted formation during 2014 are planned as follows:

(in thousands)	2014
Permian
Midland Basin
Wolfcamp/Cline	$	600,000
Wolfberry/Other	125,000
Facilities/Non-operated/Other	110,000
Delaware Basin
3rd Bone Spring/Other	185,000
Wolfcamp	175,000
Facilities/Non-operated/Other	55,000
Other Permian	45,000
San Juan Basin/Non-Operated/Other	57,000
Acquisitions/Unproved leasehold	48,000
Total	$	1,400,000

Energen also may allocate additional capital for other oil and natural gas activities such as property acquisitions and additional development of existing properties. Energen may evaluate acquisition opportunities which arise in the marketplace. Energen’s ability to invest in property acquisitions is subject to market conditions and industry trends. Property acquisitions, except as disclosed above, are not included in the aforementioned estimate of oil and natural gas investments and could result in capital expenditures different from those outlined above. To finance capital spending, Energen expects to use internally generated cash flow supplemented by its credit facilities. Energen also may issue long-term debt and equity periodically to replace short-term obligations, enhance liquidity and provide for permanent financing.

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Results of Operations

The following table summarizes information regarding our production and operating data from continuing operations.

	Three months ended						Nine months ended
	September 30,						September 30,
(in thousands, except sales price and per unit data)	2014			2013			2014			2013
Operating and production data from continuing operations
Oil, natural gas liquids and natural gas sales
Oil	$	260,447		$	285,308		$	776,952		$	710,937
Natural gas liquids	31,259			24,785			90,625			64,311
Natural gas	59,067			50,414			189,870			152,498
Total	$	350,773		$	360,507		$	1,057,447		$	927,746
Loss on sale of assets and other	$	(747	)	$	(277	)	$	(1,809	)	$	(492	)
Open non-cash mark-to-market gains (losses) on derivative instruments
Oil	$	128,346		$	(63,889	)	$	40,710		$	(63,861	)
Natural gas liquids	1,276			(1,355		)	1,603			(1,208		)
Natural gas	17,665			1,684			11,672			16,610
Total	$	147,287		$	(63,560	)	$	53,985		$	(48,459	)
Closed gains (losses) on derivative instruments
Oil	$	(6,012	)	$	(37,469	)	$	(46,568	)	$	(39,101	)
Natural gas liquids	873			2,862			1,228			8,453
Natural gas	5,587			9,975			853			27,203
Total	$	448		$	(24,632	)	$	(44,487	)	$	(3,445	)
Total Revenues	$	497,761		$	272,038		$	1,065,136		$	875,350
Production volumes
Oil (MBbl)	3,017			2,764			8,601			7,670
Natural gas liquids (MMgal)	46.5			36.7			129.2			98.5
Natural gas (MMcf)	15,156			14,868			43,956			43,428
Total production volumes (MBOE)	6,651			6,116			19,003			17,253
Average daily production volumes
Oil (MBbl/d)	32.8			30.0			31.5			28.1
Natural gas liquids (MMgal/d)	0.5			0.4			0.5			0.4
Natural gas (MMcf/d)	164.7			161.6			161.0			159.1
Total production volumes (MBOE/d)	72.3			66.5			69.6			63.2
Average realized prices excluding effects of open non-cash mark-to-market derivative instruments
Oil (per barrel)	$	84.33		$	89.67		$	84.92		$	87.59
Natural gas liquids (per gallon)	$	0.69		$	0.75		$	0.71		$	0.74
Natural gas (per Mcf)	$	4.27		$	4.06		$	4.34		$	4.14
Average realized prices excluding derivatives instruments
Oil (per barrel)	$	86.33		$	103.22		$	90.33		$	92.69
Natural gas liquids (per gallon)	$	0.67		$	0.68		$	0.70		$	0.65
Natural gas (per Mcf)	$	3.90		$	3.39		$	4.32		$	3.51
Other costs per BOE
Oil, natural gas liquids and natural gas production expenses	$	10.18		$	10.76		$	10.52		$	11.07
Production and ad valorem taxes	$	3.87		$	3.63		$	4.27		$	4.00
Depreciation, depletion and amortization	$	20.71		$	20.27		$	20.85		$	19.10
Exploration expense	$	1.24		$	1.46		$	1.24		$	0.81
General and administrative	$	4.18		$	5.06		$	4.92		$	5.03

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Revenues: Our revenues fluctuate primarily as a result of realized commodity prices, production volumes, the value of our derivative contracts and any recognized gains or losses on the sales of assets.

Our revenues are predominantly derived from the sale of oil, natural gas liquids and natural gas. In the third quarter of 2014, commodity sales decreased $9.7 million or 2.7 percent from the same period of 2013. In the nine months ended September 30, 2014, oil, natural gas liquids and natural gas sales increased $129.7 million or 14 percent from the same period of 2013. Particular factors impacting commodity sales include the following:

• Oil volumes in the third quarter increased 9.2 percent to 3,017 thousand barrels (MBbl) as new drilling in the horizontal Wolfcamp in the Midland and Delaware basins more than offset declines in the mature Central Basin Platform. For the year-to-date, oil volumes rose 12.1 percent to 8,601 MBbl.

• Average realized oil prices fell 16.4 percent to $86.33 per barrel during the three months ended September 30, 2014. Average realized oil prices decreased 2.5 percent to $90.33 per barrel during the nine months ended September 30, 2014 and included the impact of wider oil basis differentials.

• Natural gas liquids production for the current quarter rose 26.7 percent to 46.5 million gallons (MMgal) largely due to higher natural gas volumes related to the current drilling program and higher natural gas liquids recovery. For the year-to-date, natural gas liquids production rose 31.2 percent to 129.2 MMgal.

• Average realized natural gas liquids prices decreased 1.5 percent to an average price of $0.67 per gallon during the third quarter. Average realized natural gas liquids prices rose 7.7 percent to an average price of $0.70 per gallon during the nine months ended September 30, 2014.

• Natural gas production increased 1.9 percent to 15.2 billion cubic feet (Bcf) in the third quarter as production in the Permian Basin was partially offset by declining San Juan Basin production. For the nine months ended September 30, 2014, natural gas production increased 1.2 percent to 44 Bcf.

• Average realized natural gas prices rose 15 percent to $3.90 per thousand cubic feet (Mcf) during the three months ended September 30, 2014. For the current year-to-date, average realized natural gas prices increased 23.1 percent to $4.32 per Mcf.

Realized prices exclude the effects of derivative instruments.

Gains on derivative instruments were $147.7 million in the third quarter of 2014 compared to losses of $88.2 million in the same period of 2013. Gains on derivative instruments were $9.5 million in the nine months ended September 30, 2014 compared to losses of $51.9 million in the same period of 2013. Our earnings are significantly affected by the changes of our derivative instruments. Increases or decreases in the expected commodity price outlook generally result in the opposite effect on the fair value of our derivatives. However, these gains and losses are expected to be offset by the unhedged price on the related commodities.

Oil, natural gas liquids and natural gas production expense: The following table provides the components of our oil, natural gas liquids and natural gas production expenses:

	Three months ended				Nine months ended
	September 30,				September 30,
(in thousands, except per unit data)	2014		2013		2014		2013
Lease operating expenses	$	35,089	$	33,236	$	100,738	$	97,089
Workover and repair costs	21,951		21,335		66,736		61,449
Marketing and transportation	10,680		11,224		32,387		32,406
Total oil, natural gas liquids and natural gas production expense	$	67,720	$	65,795	$	199,861	$	190,944
Oil, natural gas liquids and natural gas production expense per BOE	$	10.18	$	10.76	$	10.52	$	11.07

Energen had oil, natural gas liquids and natural gas production expense of $67.7 million and $199.9 million during the three months and nine months ended September 30, 2014, respectively, as compared to $65.8 million and $190.9 million during the same periods in 2013. Lease operating expense generally reflects year-over-year increases in the number of active wells resulting from Energen’s ongoing development and exploratory activities. Lease operating expense increased $1.9 million for the quarter largely due to higher labor costs (approximately $0.9 million), higher electrical costs (approximately $0.7 million), higher producing overhead costs (approximately $0.7 million), increased chemical and treatment costs (approximately $0.6 million) and additional equipment rental expense (approximately $0.5 million) partially offset by lower water disposal costs (approximately $1.4 million). In the year-to-date, lease operating expense increased $3.6 million primarily due to increased labor costs (approximately $2.5 million), higher electrical

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costs (approximately $1.9 million), additional other operations and maintenance expense (approximately $1.6 million), higher producing overhead costs (approximately $1.5 million), increased chemical and treatment costs (approximately $1.4 million) and increased non-operated costs (approximately $1 million) partially offset by lower water disposal costs (approximately $3.4 million), decreased environmental compliance costs (approximately $2.1 million) and decreased equipment rental expense (approximately $1.3 million). On a per unit basis, the average lease operating expense for the current quarter was $5.27 per barrel of oil equivalent (BOE) as compared to $5.43 per BOE in the same period a year ago. For the nine months ended September 30, 2014, the average lease operating expense was $5.31 per BOE as compared to $5.63 per BOE in the previous period.

Workover and repair costs increased approximately $0.6 million in the three months ended September 30, 2014 and $5.3 million in the year-to-date. These expenses were primarily related to workovers in the west Texas Permian Basin associated with pump and tubing replacements. Additional expenses were incurred associated with the protective preparation of producing wells for offset operations. Also, the increased number of producing wells resulting from our ongoing drilling program creates a higher level of base load expense.

In the three months ended September 30, 2014, marketing and transportation costs decreased $0.5 million and remained relatively stable in the year-to-date.

Production and ad valorem taxes: Production and ad valorem taxes were $25.7 million ($3.87 per BOE) and $81.1 million ($4.27 per BOE), respectively, during the three and nine months ended September 30, 2014 as compared to $22.2 million ($3.63 per BOE) and $69.1 million ($4.00 per BOE), respectively, during the same periods in 2013. In the quarter, higher commodity production volumes contributed approximately $1.7 million to the increase in production-related taxes partially offset by decrease of approximately $0.9 million primarily due to lower oil and higher natural gas commodity market prices. In the year-to-date, higher natural gas liquid and natural gas commodity market prices contributed approximately $4.6 million to the increase in production-related taxes and higher commodity production volumes contributed approximately $5 million to the increase. Commodity market prices exclude the effects of derivative instruments for purposes of determining production taxes. Increased ad valorem taxes in both the quarter and year-to-date were primarily driven by the increase in the number of active wells.

Depreciation, depletion and amortization: Energen’s DD&A expense for the quarter rose $14.2 million and $67.3 million year-to-date. The average depletion rate for the current quarter was $20.71 per BOE as compared to $20.27 per BOE in the same period a year ago. For the nine months ended September 30, 2014, the average depletion rate was $20.85 per BOE as compared to $19.10 per BOE in the previous period. The increase in the current quarter and year-to-date per unit depletion rate, which contributed approximately $3 million and $33.4 million, respectively, to the increase in DD&A expense, was largely due to higher rates resulting from an increase in development costs. Higher production volumes contributed approximately $10.8 million and $33.4 million to the increase in DD&A expense for the quarter and year-to-date, respectively.

Asset impairment: During the third quarter of 2014, Energen recognized a non-cash impairment writedown on certain properties in the Permian Basin of $31.2 million pre-tax to adjust the carrying amount of these properties to their fair value based on expected future discounted cash flows in anticipation of being designated as held for sale. This non-cash impairment writedown is reflected in asset impairment on the consolidated income statement.

During the third quarter of 2014, a non-cash impairment writedown of $147.9 million pre-tax was recognized by Energen on certain gas properties in the San Juan Basin to adjust the carrying amount of these properties to their fair value based on expected future discounted cash flows in anticipation of being designated as held for sale. This non-cash impairment writedown is reflected in asset impairment on the consolidated income statement. At December 31, 2013, proved reserves associated with Energen’s San Juan Basin properties totaled 73,070 MBOE.

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Exploration: The following table provides details of our exploration expense:

	Three months ended					Nine months ended
	September 30,					September 30,
(in thousands, except per unit data)	2014			2013		2014		2013
Geological and geophysical	$	889		$	376	$	2,545	$	1,755
Leasehold abandonments	(156		)	6,426		2,431		6,826
Dry hole costs	7,499			1,395		8,785		1,932
Delay rentals and other	23			752		9,882		3,389
Total exploration expense	$	8,255		$	8,949	$	23,643	$	13,902
Total exploration expense per BOE	$	1.24		$	1.46	$	1.24	$	0.81

Exploration expense decreased $0.7 million in the third quarter of 2014 primarily due to lower leasehold abandonments and delay rentals partially offset by higher dry hole costs and seismic costs. For the nine months ended September 30, 2014, exploration expense rose $9.7 million largely as a result of higher dry hole costs, delay rental payments and seismic costs partially offset by decreased leasehold abandonments.

General and administrative: The following table provides details of our general and administrative (G&A) expense:

	Three months ended				Nine months ended
	September 30,				September 30,
(in thousands, except per unit data)	2014		2013		2014		2013
General and administrative	$	6,251	$	6,311	$	23,626	$	19,474
Benefit and performance-based compensation costs	9,124		13,647		33,197		35,405
Labor costs	12,409		10,989		36,676		31,820
Total general and administrative expense	$	27,784	$	30,947	$	93,499	$	86,699
Total general and administrative expense per BOE	$	4.18	$	5.06	$	4.92	$	5.03

Total G&A expense decreased $3.2 million for the three months ended September 30, 2014 largely due to decreased costs from Energen’s benefit and performance-based compensation plans and lower legal expenses partially offset by higher labor costs. Total G&A expense rose $6.8 million for the year-to-date primarily due to increased labor costs partially offset by decreased costs from Energen’s benefit and performance-based compensation plans and lower legal expenses.

Interest expense: Interest expense increased $1.4 million in the third quarter of 2014 largely due to the write-off of debt issuance costs of $2.7 million associated with the $600 million Senior Term Loans issued in December 2013 (Senior Term Loans) and $0.4 million the October 2012 syndicated credit facilities partially offset by a decrease in credit facility borrowings. In the nine months ended September 30, 2014, interest expense decreased $2.9 million largely due to the October 2013 repayment of $50 million of 5 percent Notes, the December 2013 repayment of the $300 million Senior Term Loans issued in November 2011 and reduced credit facility borrowings partially offset by the write-off of debt issuance costs as described above. The interest expense associated with the Senior Term Loans and the October 2012 syndicated credit facilities are reflected in discontinued operations. In conjunction with the sale of Alagasco, the Senior Term Loans and the syndicated credit facilities were repaid in September 2014.

Income tax expense (benefit): Income tax expense increased $12.9 million in the current quarter largely due to higher pre-tax income. In the year-to-date, income tax expense declined $30.1 million primarily due to lower pre-tax income.

Discontinued operations, net of tax: On September 2, 2014, Energen completed the transaction to sell Alagasco to Laclede for $1.6 billion, less the assumption of $267 million in debt. The net tax proceeds to Energen totaled approximately $1.32 billion, subject to closing adjustments. This sale has an effective date of August 31, 2014. Energen used cash proceeds from the sale to reduce long-term and short-term indebtedness. During the second quarter of 2014, Energen classified Alagasco as held for sale with prior period comparable and reflected the associated operating results in discontinued operations. Our results of operations for the three months and nine months ended September 30, 2014 and 2013 and our financial position as of September 30, 2014 and December 31, 2013 presented in our unaudited consolidated financial statements reflect Alagasco as discontinued operations.

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In March 2014, Energen completed the sale of its North Louisiana/East Texas natural gas and oil properties for $30.3 million (subject to closing adjustments). The sale had an effective date of December 1, 2013, and the proceeds from the sale were used to repay short-term obligations. During the third quarter of 2013, Energen classified these natural gas and oil properties as held for sale and reflected the associated operating results in discontinued operations. Energen recognized a non-cash impairment writedown on these properties in the first quarter of 2014 of $1.7 million pre-tax to adjust the carrying amount of these properties to their fair value based on an estimate of the selling price of the properties. This non-cash impairment writedown is reflected in loss on disposal of discontinued operations in the nine months ended September 30, 2014. Energen also recognized non-cash impairment writedowns on these properties in the third and fourth quarters of 2013 of $24.6 million pre-tax and $5.2 million pre-tax, respectively. At December 31, 2013, proved reserves associated with Energen’s North Louisiana/East Texas properties totaled 23 Bcf of natural gas and 91 MBbl of oil.

In October 2013, Energen completed the sale of its Black Warrior Basin coalbed methane properties in Alabama for $160 million (subject to closing adjustments). Energen recorded a pre-tax gain on the sale of approximately $35 million in the fourth quarter of 2013 which was reflected in gain on disposal of discontinued operations in the year ended December 31, 2013. The sale had an effective date of July 1, 2013, and the proceeds from the sale were used to repay short-term obligations. The property was classified as held for sale and reflected in discontinued operations during the third quarter of 2013. At December 31, 2012, proved reserves associated with Energen’s Black Warrior Basin properties totaled 97 Bcf of natural gas.

See Note 12, Discontinued Operations, in the Condensed Notes to Unaudited Consolidated Financial Statements for additional information regarding discontinued operations.

FINANCIAL POSITION AND LIQUIDITY

Cash Flow

The key drivers impacting our cash flow from operations are our oil, natural gas liquids and natural gas production volumes and overall commodity market prices, net of the effects of settlements on our derivative commodity instruments. We rely on our cash flows from operations supplemented by borrowings under our syndicated credit facility to fund our capital spending plans and working capital requirements.

Net cash provided by operating activities: Net cash provided by operating activities for the nine months ended September 30, 2014 was $709.3 million as compared to $728.0 million for the same period of 2013 and included discontinued operations primarilyassociated with cash flows from Alagasco of $112.2 million and $149.5 million, respectively. Energen’s working capital was influenced by commodity prices and the timing of payments and recoveries.

Net cash provided by (used in) investing activities: Net cash provided by investing activities for the nine months ended September 30, 3014 was $345.5 million as compared to net cash used in investing activities of $968.2 million for the same period of 2013. Energen incurred on a cash basis $933 million in capital expenditures largely related to the development of oil and gas properties and $26 million primarily related to unproved leasehold acquisitions. Included in the proceeds from the sale of Alagasco and other assets are cash proceeds of $1.3 billion from the sale of Alagasco and $30.3 million from the sale of the North Louisiana/East Texas properties. Discontinued operations is largely related to Alagasco capital expenditures through the date of sale.

Net cash provided by (used in) financing activities: Net cash used in financing activities for the nine months ended September 30, 3014 was $1,059.0 million as compared to net cash provided by financing activities of $242.9 million for the same period of 2013. Net cash used in financing activities in the year-to-date 2014 was primarily due to the repayment of the Senior Term Loans, a decrease in credit facility borrowings, discontinued operations primarily related to the sale of Alagasco and the payment of dividends to common shareholders partially offset by the issuance of common stock through the Company’s stock-based compensation plan. Net cash provided by financing activities in the year-to-date 2013 was largely due to an increase in borrowings from the credit facility and the issuance of common stock through the Company’s stock-based compensation plan partially offset by the payment of dividends to common shareholders and discontinued operations primarily related to the sale of Alagasco.

Derivative Commodity Instruments

We periodically enter into derivative commodity instruments to hedge our exposure to price fluctuations on oil, natural gas liquids and natural gas production. Such instruments may include over-the-counter swaps and basis swaps typically executed with investment and commercial banks and energy-trading firms. Derivative transactions are pursuant to standing authorizations by the Board of Directors, which do not authorize speculative positions.

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Due to the volatility of commodity prices, the estimated fair value of our derivative instruments is subject to fluctuation from period to period, which could result in significant differences between the current estimated fair value and the ultimate settlement price. Additionally, Energen is at risk of economic loss based upon the creditworthiness of our counterparties. We were in a net gain position with thirteen of our active counterparties and in a net loss position with the remaining one at September 30, 2014.

See Note 3, Fair Value Measurements, in the Condensed Notes to Unaudited Consolidated Financial Statements for information regarding our policies on fair value measurement.

Inflation and Changes in Prices

Our revenues, the value of our assets and our ability to obtain additional capital on attractive terms have been and will continue to be affected by changes in oil, natural gas liquids and natural gas prices and the costs to produce our reserves. Oil, natural gas liquids and natural gas prices are subject to significant variations that are beyond our ability to predict or to control. Although some of our costs are impacted by general inflation, the majority of our costs are a function of supply and demand specific to the oil and gas industry. The overall increase in oil and natural gas prices over the past several years has resulted in increased competition and activity in the industry which has caused some costs, including those to obtain certain resources to operate our business, to increase.

Credit Facility and Working Capital

Access to capital is an integral part of Energen’s business plan. While we expect to have ongoing access to our credit facility and long-term capital markets, continued access could be adversely affected by current and future economic and business conditions and possible credit rating downgrades. On September 2, 2014, Energen entered into a $1.5 billionfive-year syndicated secured credit facility with domestic and foreign lenders. The credit facility has an initial borrowing base of $2.1 billion. This credit facility refinances and replaces the $1.25 billionfive-year syndicated unsecured credit facility entered into on October 30, 2012. Energen’s obligations under the $1.5 billion syndicated credit facility are unconditionally guaranteed by Energen Resources. The current credit facility qualifies for classification as long-term debt on the consolidated balance sheets. The financial covenants of the credit facility require Energen to maintain a ratio of total debt to consolidated income before interest expense, income taxes, depreciation, depletion, amortization, exploration expense and other non-cash income and expenses (EBITDAX) less than or equal to 4.0 to 1.0, to maintain a ratio of consolidated current assets (adjusted to include amounts available for borrowings and exclude non-cash derivative instruments) to consolidated current liabilities (adjusted to exclude maturities under the credit facility and non-cash derivative instruments) greater than or equal to 1.0 to 1.0 and, during certain periods, to maintain a ratio of the net present value of proved reserves of our oil and natural gas properties to consolidated total debt greater than or equal to 1.50 to 1.0. Our credit facility also limits our ability to enter into commodity hedges based on projected production volumes.

At September 30, 2014, Energen reported unadjusted negative working capital of $304.9 million arising from current liabilities of $593.4 million exceeding current assets of $288.5 million. The negative working capital is largely due to accrued income taxes payable of $227.2 million largely from the sale of Alagasco. This amount will be paid in the fourth quarter and will be funded using our credit facility.

Working capital of Energen is also influenced by the fair value of Energen’s derivative financial instruments associated with future production. Energen has $30.2 million in current assets and $0.8 million in current liabilities, respectively, associated with its derivative instruments at September 30, 2014. Energen relies upon cash flows from operations supplemented by our credit facility to fund working capital needs.

Credit Ratings

On September 3, 2014, following the sale of Alagasco, Standard & Poor’s (S&P) lowered its credit ratings for Energen from BBB- to BB with a stable outlook. On April 8, 2014, Moody’s Investors Service lowered Energen’s senior unsecured credit rating from Baa3 to Ba1 with a negative outlook.

Dividends

Dividends for the first, second and third quarter of 2014 were $0.15 per share on the Energen common stock and a $0.02 per share dividend has been declared for the fourth quarter of 2014. Subsequent to the sale of Alagasco, the Company substantially reduced the amount of its dividend payments with a focus on further development and exploration of its oil and natural gas properties. The amount and timing of all dividend payments is subject to the discretion of the Board of Directors and is based upon business conditions, results of operations, financial conditions and other factors. Energen’s credit facility prohibits payment of dividends during an event of default, if the payment would result in an event of default or if availability is less than 10 percent of the loan limit under the credit facility.

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Employee Benefit Plans

In October 2014, Energen’s Board of Directors elected to freeze and terminate its qualified defined benefit pension plan. A plan amendment adopted in October 2014 closes the plan to new entrants, effective November 1, 2014, and freezes benefit accruals after December 31, 2014. Energen intends to terminate the plan on January 31, 2015. We anticipate distributing benefits under the plan in late 2015 or early 2016 pending receipt of a determination letter from the Internal Revenue Service and completion of certain administrative actions.

The Company’s non-qualified supplemental retirement plans will also be amended to terminate effective December 31, 2014. Distributions under the plans are subject to certain payment restrictions under the Internal Revenue Code and Treasury regulations and payments to plan participants will be made in each of the first quarters of 2015 and 2016. In connection with the termination of these plans, the Company has also reclassified approximately $17.1 million as of September 30, 2014 of its investment in a Rabbi Trust from other long term assets to prepayments and other assets in the accompanying balance sheets to reflect its intent to utilize these assets to fund the estimated payments in the first quarter of 2015.

In October 2014, Energen’s Board of Directors amended and restated the Employee Saving Plan to make certain benefit design changes effective January 1, 2015. The benefit design changes are expected to include an increase in the percentage of Company match and other contributions.

Stock Repurchase Authorization

From time to time, the Company may repurchase shares of its common stock through open market or negotiated purchases. Such repurchases would be pursuant to a 3.6 million share repurchase authorization approved by the Board of Directors on October 22, 2014. The timing and amounts of any repurchases are subject to changes in market conditions and other business considerations. We would expect to finance any share repurchases under our existing credit facility.

Contractual Cash Obligations

In the course of ordinary business activities, Energen enters into a variety of contractual cash obligations and other commitments. The following table summarizes Energen’s significant contractual cash obligations, other than hedging contracts, as of September 30, 2014:

	Payments Due Before December 31,
(in thousands)	Total		Remaining 2014		2015-2016		2017-2018		2019 and Thereafter
Long-term debt (1)	$	632,900	$	—	$	—	$	19,000	$	613,900
Interest payments on debt	274,934		23,183		61,821		59,838		130,092
Operating leases	13,891		748		5,975		4,842		2,326
Asset retirement obligations (2)	728,495		11,360		6,162		6,040		704,933
Nonqualified supplemental retirement plans	36,236		5,095		31,141		—		—
Total contractual cash obligations	$	1,686,456	$	40,386	$	105,099	$	89,720	$	1,451,251

(1) Long-term debt obligations include approximately $0.4 million of unamortized debt discounts as of September 30, 2014.

(2) Represents the estimated future asset retirement obligation on an undiscounted basis.

Energen operates in certain instances through joint ventures under joint operating agreements. Typically, the operator under a joint operating agreement enters into contracts, such as drilling contracts, for the benefit of all joint venture partners. Through the joint operating agreement, the non-operators reimburse, and in some cases advance, the funds necessary to meet the contractual obligations entered into by the operator. These obligations are typically shared on a working interest basis as defined in the joint operating contractual agreement.

Under various agreements for third party gathering, treatment, transportation or other services, Energen is committed to deliver minimum production volumes or to pay certain costs in the event the minimum quantities are not delivered. These delivery commitments are approximately 6 MMBOE through September 2017.

Energen is required to make approximately $7.7 million in contributions for 2014 to the qualified pension plans. This estimate includes required contributions for the Alagasco pension plans through August 31, 2014. In January 2014, we made a $3.0 million

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contribution and have utilized funding credits, as established under Internal Revenue Code Section 430(f), to meet the remaining required funding. We also made an additional discretionary contribution of $10 million to the Energen qualified pension plan in October 2014. We do not anticipate that the funded status of the qualified pension plans will fall below statutory thresholds requiring accelerated funding or constraints on benefit levels or plan administration. We may also make additional discretionary contributions to the qualified pension plan depending on the amount and timing of employee retirements and market conditions. The contractual obligations reported above exclude any payments Energen expects to make to postretirement benefit program assets.

The contractual obligations reported above exclude Energen’s liability of $17.1 million related to Energen’s provision for uncertain tax positions. Energen cannot make a reasonably reliable estimate of the amount and period of related future payments for such liability.

Other Commitments

New Mexico Audits: In 2011, Energen Resources received an Order to Perform Restructured Accounting and Pay Additional Royalties (the Order), following an audit performed by the Taxation and Revenue Department (the Department) of the State of New Mexico on behalf of the Office of Natural Resources Revenue (ONRR), of federal oil and gas leases in New Mexico. The audit covered periods from January 2004 through December 2008 and included a review of the computation and payment of royalties due on minerals removed from specified U.S. federal leases. The Order addressed ONRR’s efforts to change accounting and reporting practices, and to unbundle fees charged by third parties that gather, compress and transport natural gas production. ONRR now maintains that all or some of such fees are not deductible.

Energen Resources appealed the Orderin 2011 and in July 2012, on a motion from ONRR, the Orderwas remanded. In August 2014, ONRR issued its Revised Order that is now under appeal. In the Revised Order, ONRR has ordered that Energen pay additional royalties on production from certain federal leases in the amount of $129,700. Energen estimates that application of the Revised Order to all of the Company’s federal leases would result in ONRR claims up to approximately $23 million, plus interest and penalties from 2004 forward. ONRR began implementing its unbundling initiative in 2010, but seeks to implement its revisions retroactively, despite the fact that they conflict with previous audits, allowances and industry practice. Energen continues to vigorously contest the Revised Order and the findings. Management is unable, at this time, to determine a range of reasonably possible losses, and no amount has been accrued as of September 30, 2014.

Recent Accounting Standards Updates

See Note 14, Recently Issued Accounting Standards, in the Condensed Notes to Unaudited Consolidated Financial Statements for information regarding recently issued accounting standards.

FORWARD-LOOKING STATEMENTS AND RISK FACTORS

The disclosure and analysis in this report contains forward-looking statements that express management’s expectations of future plans, objectives and performance of the Company and its subsidiaries. Such statements constitute forward-looking statements within the meaning of Section 27A of the Securities Act, as amended, and Section 21E of the Exchange Act, as amended, and are noted in the Company’s disclosure as permitted by the Private Securities Litigation Reform Act of 1995. Forward-looking statements often address the Company’s future business and financial performance and financial condition, and often contain words such as “expect”, “anticipate”, “intend”, “plan”, “believe”, “seek”, “see”, “project”, “will”, “estimate”, “may”, and other words of similar meaning.

All statements based on future expectations rather than on historical facts are forward-looking statements that are dependent on certain events, risks and uncertainties (many of which are beyond our control) that could cause actual results to differ materially from those anticipated. Some of these include, but are not limited to, economic and competitive conditions, production levels, reserve levels, energy markets, supply and demand for and the price of energy commodities including oil, natural gas liquids and natural gas, fluctuations in the weather, drilling risks, costs associated with compliance with environmental and regulatory obligations, inflation rates, legislative and regulatory changes, financial market conditions, the Company’s ability to access the capital markets, acts of nature, sabotage, terrorism (including cyber-attacks) and other similar acts that disrupt operations or cause damage greater than covered by insurance, future business decisions, litigation results and other factors and uncertainties discussed elsewhere in this report and in the Company’s other public filings and press releases, all of which are difficult to predict. While it is not possible to predict or identify all the factors that could cause the Company’s actual results to differ materially from expected or historical results, the Company has identified certain risk factors which may affect the Company’s future business and financial performance.

Except as otherwise disclosed, the forward-looking statements do not reflect the impact of possible or pending acquisitions, investments, divestitures or restructurings. The absence of errors in input data, calculations and formulas used in estimates, assumptions and forecasts cannot be guaranteed. The Company does not undertake any obligation to correct or update any forward-looking statements whether as a result of new information, future events or otherwise.

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Commodity prices for crude oil and natural gas are volatile, and a substantial reduction in commodity prices could adversely affect Energen’s results and the carrying value of its oil and natural gas properties: The Company is significantly influenced by commodity prices. Historical markets for oil, natural gas liquids and natural gas have been volatile. Energen Resources’ revenues, operating results, profitability and cash flows depend primarily upon the prices realized for its oil, natural gas liquids and natural gas production. Additionally, downward commodity price trends may impact expected cash flows from future production and potentially reduce the carrying value of Company-owned oil and natural gas properties.

Market conditions or a downgrade in the credit ratings of Energen or its subsidiaries could negatively impact its cost of and ability to access capital for future development and working capital needs: The Company and its subsidiaries rely on access to credit markets. The availability and cost of credit market access is significantly influenced by market events and rating agency evaluations for lenders, the Company and its subsidiaries. In addition to operating results, business decisions relating to recapitalization, refinancing, restructuring, acquisition and disposition (including by sale, spin-off or distribution) transactions involving Energen or Energen Resources may negatively impact market and rating agency considerations regarding the credit of the Company or its subsidiaries, and the management of the Company periodically considers these types of transactions. Market volatility and credit market disruption may severely limit credit availability and issuer credit ratings can change rapidly. Events negatively affecting credit ratings and credit market liquidity could increase borrowing costs, limit availability of funds to the Company and adversely affect the price of outstanding debt securities.

Energen Resources’ hedging activities may prevent Energen Resources from benefiting fully from price increases and expose Energen Resources to other risks, including counterparty credit risk: Although Energen Resources makes use of swaps, options, collars and fixed-price contracts to mitigate price risk, fluctuations in future oil, natural gas liquids and natural gas prices could materially affect the Company’s financial position, results of operations and cash flows; furthermore, such risk mitigation activities may cause the Company’s financial position and results of operations to be materially different from results that would have been obtained had such risk mitigation activities not occurred. The effectiveness of such risk mitigation assumes that counterparties maintain satisfactory credit quality. The effectiveness of such risk mitigation also assumes that actual sales volumes will generally meet or exceed the volumes subject to the swaps, options, collars and fixed-price contracts. A substantial failure to meet sales volume targets, whether caused by miscalculations, weather events, natural disaster, accident, mechanical failure, criminal act or otherwise, could leave Energen Resources financially exposed to its counterparties and result in material adverse financial consequences to Energen Resources and Energen. The adverse effect could be increased if the adverse event was widespread enough to move market prices against Energen Resources’ position. In addition, various existing and pending financial reform rules and regulations could have an adverse effect on the ability of Energen Resources to use derivative instruments which could have a material adverse effect on our financial position, results of operations and cash flows.

Energen is exposed to counterparty credit risk as a result of its concentrated customer base: Revenues and related accounts receivable from oil and natural gas operations primarily are generated from the sale of produced oil, natural gas liquids and natural gas to a small number of energy marketing companies. Such sales are typically made on an unsecured credit basis with payment due the month following delivery. This concentration of sales to a limited number of customers in the energy marketing industry has the potential to affect the Company’s overall exposure to credit risk, either positively or negatively, based on changes in economic, industry or other conditions specific to a single customer or to the energy marketing industry generally. Energen Resources considers the credit quality of its customers and, in certain instances, may require credit assurances such as a deposit, letter of credit or parent guarantee.

Energen’s operations depend upon the use of third-party facilities and an interruption of its ability to utilize these facilities may adversely affect its financial condition and results of operations: Energen Resources delivers to third-party facilities. These facilities include third-party oil and natural gas gathering, transportation, processing and storage facilities. Energen Resources relies upon such facilities for access to markets for its production. Such facilities are typically limited in number and geographically concentrated. An extended interruption of access to or service from these facilities, whether caused by weather events, natural disaster, accident, mechanical failure, criminal act or otherwise could result in material adverse financial consequences to Energen and Energen Resources.

Energen’s oil and natural gas reserves are estimates, and actual future production may vary significantly and may also be negatively impacted by its inability to invest in production on planned timelines:There are numerous uncertainties inherent in estimating quantities of proved oil and natural gas reserves and in projecting future rates of production and timing of development expenditures. The total amount or timing of actual future production may vary significantly from reserve and production estimates. In the event Energen Resources is unable to fully invest its planned development, acquisition and exploratory expenditures, future operating revenues, production, and proved reserves could be negatively affected. The drilling of development and exploratory wells can involve significant risks, including those related to timing, success rates and cost overruns, and these risks can be affected by lease and rig availability, complex geology and other factors. Anticipated drilling plans and capital expenditures may also change

37

due to weather, manpower and equipment availability, changing emphasis by management and a variety of other factors which could result in actual drilling and capital expenditures being substantially different than currently planned.

Energen’s operations involve operational risk including risk of personal injury, property damage and environmental damage and its insurance policies do not cover all such risks: Inherent in the oil and natural gas production activities of Energen Resources are a variety of hazards and operation risks, such as:

• Pipeline and storage leaks, ruptures and spills;

• Equipment malfunctions and mechanical failures;

• Fires and explosions;

• Well blowouts, explosions and cratering; and

• Soil, surface water or groundwater contamination from petroleum constituents, hydraulic fracturing fluid or produced water.

Such events could result in loss of human life, significant damage to property, environmental pollution, impairment of operations and substantial financial losses. The location of certain of our pipeline and storage facilities near populated areas, including residential areas, commercial business centers and industrial sites, could increase the level of damages resulting from these risks. In accordance with customary industry practices, the Company maintains insurance against some, but not all, of these risks and losses and the insurance coverages are subject to retention levels and coverage limits. The occurrence of any of these events could adversely affect Energen and Energen Resources’ financial positions, results of operations and cash flows.

Energen is subject to numerous federal, state and local laws and regulations that may require significant expenditures or impose significant restrictions on its operations: Energen is subject to extensive federal, state and local regulation which significantly influences operations. Although the Company believes that operations generally comply with applicable laws and regulations, failure to comply could result in the suspension or termination of operations and subject the Company to administrative, civil and criminal penalties.Federal, state and local legislative bodies and agencies frequently exercise their respective authority to adopt new laws and regulations and to amend, modify and interpret existing laws and regulations. Such changes can subject the Company to significant tax or cost increases and can impose significant restrictions and limitations on the Company’s operations.

Energen’s business could be negatively impacted by security threats, including cybersecurity threats, and related disruptions:Energen relies on its information technology infrastructure to process, transmit and store electronic information critical for the efficient operation of its business and day-to-day operations. All information systems are potentially vulnerable to security threats, including hacking, viruses, other malicious software and other unlawful attempts to disrupt or gain access to such systems. Breaches in the Company’s information technology infrastructure could lead to a material disruption in its business, including the theft, destruction, loss, misappropriation or release of confidential data or other business information, and may have a material adverse effect on the Company’s operations, financial position and results of operations.

38

SELECTED BUSINESS SEGMENT DATA
ENERGEN CORPORATION
(Unaudited)
	Three months ended						Nine months ended
	September 30,						September 30,
(in thousands, except sales price and per unit data)	2014			2013			2014			2013
Oil and Gas Operations
Oil, natural gas liquids and natural gas sales from continuing operations
Oil	$	260,447		$	285,308		$	776,952		$	710,937
Natural gas liquids	31,259			24,785			90,625			64,311
Natural gas	59,067			50,414			189,870			152,498
Total	$	350,773		$	360,507		$	1,057,447		$	927,746
Loss on sale of assets and other	$	(747	)	$	(277	)	$	(1,809	)	$	(492	)
Open non-cash mark-to-market gains (losses) on derivative instruments
Oil	$	128,346		$	(63,889	)	$	40,710		$	(63,861	)
Natural gas liquids	1,276			(1,355		)	1,603			(1,208		)
Natural gas	17,665			1,684			11,672			16,610
Total	$	147,287		$	(63,560	)	$	53,985		$	(48,459	)
Closed gains (losses) on derivative instruments
Oil	$	(6,012	)	$	(37,469	)	$	(46,568	)	$	(39,101	)
Natural gas liquids	873			2,862			1,228			8,453
Natural gas	5,587			9,975			853			27,203
Total	$	448		$	(24,632	)	$	(44,487	)	$	(3,445	)
Total revenues	$	497,761		$	272,038		$	1,065,136		$	875,350
Production volumes from continuing operations
Oil (MBbl)	3,017			2,764			8,601			7,670
Natural gas liquids (MMgal)	46.5			36.7			129.2			98.5
Natural gas (MMcf)	15,156			14,868			43,956			43,428
Production volumes from continuing operations (MBOE)	6,651			6,116			19,003			17,253
Total production volumes (MBOE)	6,652			6,758			19,168			19,159
Average realized prices excluding effects of open non-cash mark-to-market derivative instruments
Oil (per barrel)	$	84.33		$	89.67		$	84.92		$	87.59
Natural gas liquids (per gallon)	$	0.69		$	0.75		$	0.71		$	0.74
Natural gas (per Mcf)	$	4.27		$	4.06		$	4.34		$	4.14
Average realized prices excluding derivative instruments
Oil (per barrel)	$	86.33		$	103.22		$	90.33		$	92.69
Natural gas liquids (per gallon)	$	0.67		$	0.68		$	0.70		$	0.65
Natural gas (per Mcf)	$	3.90		$	3.39		$	4.32		$	3.51
Other costs per BOE from continuing operations
Oil, natural gas liquids and natural gas production expenses	$	10.18		$	10.76		$	10.52		$	11.07
Production and ad valorem taxes	$	3.87		$	3.63		$	4.27		$	4.00
Depreciation, depletion and amortization	$	20.71		$	20.27		$	20.85		$	19.10
Exploration expense	$	1.24		$	1.46		$	1.24		$	0.81
General and administrative expense	$	4.18		$	5.06		$	4.92		$	5.03
Capital expenditures	$	356,725		$	257,759		$	950,993		$	892,691

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

The following quantitative and qualitative disclosures about market risk are supplementary to the quantitative and qualitative disclosures provided in our Annual Report on Form 10-K for the year ended December 31, 2013, and the information contained herein should be read in conjunction with the related disclosures in our Annual Report on Form 10-K for the year ended December 31, 2013.

We are exposed to various market risks including commodity price risk, counterparty credit risk and interest rate risk. We seek to manage these risks through our risk management program which often includes the use of derivative instruments. We do not enter into derivative or other financial instruments for speculative or trading purposes.

Commodity price risk: Energen’s major market risk exposure is in the pricing applicable to its oil and gas production. Historically, prices received for oil, natural gas liquids and natural gas production have been volatile due to seasonal weather patterns, world and national supply-and-demand factors and general economic conditions. Crude oil prices also are affected by quality differentials, by worldwide political developments and by actions of the Organization of the Petroleum Exporting Countries. Basis differentials, like the underlying commodity prices, can be volatile because of regional supply-and-demand factors, including seasonal factors and the availability and price of transportation to consuming areas.

We periodically enter into derivative commodity instruments to hedge our exposure to price fluctuations on oil, natural gas liquids and natural gas production. Such instruments may include over-the-counter swaps and basis swaps typically executed with investment and commercial banks and energy-trading firms.

As of September 30, 2014, Energen had entered into the following transactions for the remainder of 2014 and subsequent years:

Production Period	Total Hedged Volumes		Average Contract Price	Description	Fair Value (in thousands)
Oil
2014	2,502	MBbl	$92.66 Bbl	NYMEX Swaps	$	6,155
2015	8,280	MBbl	$89.30 Bbl	NYMEX Swaps	12,615
Oil Basis Differential
2014	300	MBbl	$(3.30) Bbl	WTS/WTI Basis Swaps*	1,115
2014	600	MBbl	$(3.08) Bbl	WTI/WTI Basis Swaps**	2,736
2015	2,160	MBbl	$(4.30) Bbl	WTS/WTI Basis Swaps*	(181		)
2015	6,120	MBbl	$(5.11) Bbl	WTI/WTI Basis Swaps**	(1,979		)
Natural Gas Liquids
2014	18.5	MMgal	$0.93 Gal	Liquids Swaps	1,316
Natural Gas
2014	2.6	Bcf	$4.57 Mcf	NYMEX Swaps	1,209
2014	7.6	Bcf	$4.62 Mcf	Basin Specific Swaps - San Juan	4,954
2014	2.6	Bcf	$3.81 Mcf	Basin Specific Swaps - Permian	(358		)
2015	23.0	Bcf	$4.13 Mcf	Basin Specific Swaps - San Juan	5,097
2015	6.0	Bcf	$4.20 Mcf	Basin Specific Swaps - Permian	1,924
Natural Gas Basis Differential
2014	1.5	Bcf	$(0.09) Mcf	San Juan Basis Swaps	(54		)
2014	0.6	Bcf	$(0.17) Mcf	Permian Basis Swaps	(14		)
September 2014 contracts (closed but not cash settled)					(30		)
Total					$	34,505
*WTS - West Texas Sour/Midland, WTI - West Texas Intermediate/Cushing
**WTI - West Texas Intermediate/Midland, WTI - West Texas Intermediate/Cushing

40

Realized prices are anticipated to be lower than New York Mercantile Exchange prices primarily due to basis differences and other factors.

Additionally, we have entered into certain sales volume and supply target arrangements with certain customers. A failure to meet sales volume targets at Energen due to miscalculations, weather events, natural disasters, accidents, mechanical failures, criminal acts or otherwise could leave us exposed to our counterparties in commodity hedging contracts and result in material adverse financial losses.

Counterparty credit risk: Our principal exposure to credit risk is through the sale of our oil, natural gas liquids and natural gas production, which we market to energy marketing companies. Such sales are typically made on an unsecured credit basis with payment due the month following delivery. This concentration of sales to the energy marketing industry has the potential to affect our overall exposure to credit risk. We consider the credit quality of our purchasers and, in certain instances, may require credit assurances such as a deposit, letter of credit or parent guarantee.

We are also at risk for economic loss based upon the credit worthiness of our derivative instrument counterparties. The counterparties to the commodity instruments are investment banks and energy-trading firms and are believed to be creditworthy by Energen. All hedge transactions are subject to Energen’s risk management policy, approved by the Board of Directors, which does not permit speculative positions. Energen formally documents all relationships between hedging instruments and hedged items at the inception of the hedge, as well as its risk management objective and strategy for undertaking the hedge.

Interest rate risk: Our interest rate exposure as of September 30, 2014 primarily relates to our syndicated credit facilities with variable interest rates. At September 30, 2014, we had interest rate swap agreements with a notional of $150 million. The interest rate swaps exchange a variable interest rate for a fixed interest rate of 1.0425 percent. The fair value of our interest rate swaps was a $1.0 million liability at September 30, 2014. The weighted average interest rate for amounts outstanding at September 30, 2014 was 1.66 percent. The Company’s interest rate exposure on long-term debt as of September 30, 2014 was minimal since approximately 88 percent of long-term debt obligations were at fixed rates.

41

ITEM 4. CONTROLS AND PROCEDURES

(a) Our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934) are designed to provide reasonable assurance of achieving their objectives and, as of the end of the period covered by this report, our chief executive officer and chief financial officer concluded that our disclosure controls and procedures are effective at that reasonable assurance level.

(b) During the period covered by this report, Energen completed the sale of Alabama Gas Corporation (Alagasco). Prior to the sale, certain Energen financial reporting processes were performed through the Alagasco accounting system. Subsequent to the sale, these processes were performed through the accounting system of Energen Resources. Also, during the period covered by this report, Energen transitioned the processing of payroll to a third party service organization. These changes resulted in changes to internal controls in the financial reporting and payroll processes.

There were no other changes in our internal controls that materially affected or are reasonably likely to materially affect our internal control over financial reporting.

42

PART II: OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

Energen and its affiliates are, from time to time, parties to various pending or threatened legal proceedings. Certain of these lawsuits include claims for punitive damages in addition to other specified relief. Various pending or threatened legal proceedings are in progress currently. See Note 8, Commitments and Contingencies, in the Condensed Notes to Unaudited Consolidated Financial Statements for further discussion with respect to legal proceedings.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

Period	Total Number of Shares Purchased		Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans	Maximum Number of Shares that May Yet Be Purchased Under the Plans
July 1, 2014 through July 31, 2014	—		$	—	—	8,992,700	**
August 1, 2014 through August 31, 2014	—		—		—	8,992,700	**
September 1, 2014 through September 30, 2014	7,990	*	79.56		—	8,992,700	**
Total	7,990		$	79.56	—
Share Purchase Plans						3,600,000	***

*Acquired in connection with tax withholdings and payment of exercise price on stock compensation plans.

**By resolution adopted May 24, 1994, and supplemented by resolutions adopted April 26, 2000 and June 24, 2006, the Board of Directors authorized Energen to repurchase up to 12,564,400 shares of Energen common stock.

***By resolution adopted October 22, 2014, the Board of Directors authorized Energen to repurchase up to 3.6 million shares of Energen common stock, replacing and superseding its prior stock repurchase authorizations. The resolution does not have an expiration date and does not limit Energen’s authorization to acquire shares in connection with tax withholdings and payment of exercise price on stock compensation plans.

ITEM 6. EXHIBITS

*10	-	Credit Agreement, dated September 2, 2014, by and among Energen Corporation, as borrower, Wells Fargo Bank, National Association, as administrative agent, and the institutions named therein as lenders which was filed as Exhibit 10.1 to Energen’s Current Report on Form 8-K, dated September 2, 2014.
31(a)	-	Section 302 Energen Corporation Certification required by Rule 13a-14(a) or Rule 15d-14(a)
31(b)	-	Section 302 Energen Corporation Certification required by Rule 13a-14(a) or Rule 15d-14(a)
32(a)	-	Section 906 Energen Corporation Certification pursuant to 18 U.S.C. Section 1350
101	-	The financial statements and notes thereto from Energen Corporation’s Quarterly Report on Form 10-Q for the quarter
		ended September 30, 2014 are formatted in XBRL
*Incorporated by reference

43

SIGNATURES

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

		ENERGEN CORPORATION
November 7, 2014	By	/s/ J. T. McManus, II
		J. T. McManus, II Chairman, Chief Executive Officer and President of Energen Corporation
November 7, 2014	By	/s/ Charles W. Porter, Jr.
		Charles W. Porter, Jr. Vice President, Chief Financial Officer and Treasurer of Energen Corporation
November 7, 2014	By	/s/ Russell E. Lynch, Jr.
		Russell E. Lynch, Jr. Vice President and Controller of Energen Corporation

44

EX-31.A

Exhibit 31(a)

CERTIFICATION

I, J.T. McManus, II, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Energen 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(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15(d)-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(s) 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 function):

a) All significant deficiencies and material weaknesses in the design or operation of internal controls 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.

November 7, 2014	By	/s/ J. T. McManus, II
		J. T. McManus, II Chairman, Chief Executive Officer and President of Energen Corporation

EX-31.B

Exhibit 31(b)

CERTIFICATION

I, Charles W. Porter, Jr., certify that:

1. I have reviewed this quarterly report on Form 10-Q of Energen 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(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15(d)-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(s) 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 function):

a) All significant deficiencies and material weaknesses in the design or operation of internal controls 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.

November 7, 2014	By	/s/ Charles W. Porter, Jr.
		Charles W. Porter, Jr. Vice President, Chief Financial Officer and Treasurer of Energen Corporation

EX-32.A

Exhibit 32(a)

CERTIFICATION PURSUANT TO

18 U.S.C. 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Energen Corporation (the “Registrant”) on Form 10-Q for the period ended September 30, 2014, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned hereby certifies with respect to the registrant, pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to his knowledge, the Report fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934 and the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated as of November 7, 2014

By	/s/ J. T. McManus, II
	J. T. McManus, II Chairman, Chief Executive Officer and President of Energen Corporation
By	/s/ Charles W. Porter, Jr.
	Charles W. Porter, Jr. Vice President, Chief Financial Officer and Treasurer of Energen Corporation

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to Energen Corporation and will be retained by Energen Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Derivative Commodity Instruments Derivative Commodity instruments not designated as hedging instruments on the Income Statement (Details) (Gain (loss) on derivative instruments, net, USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Gain (loss) on derivative instruments, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Open non-cash mark-to-market gains (losses) on derivative instruments	$ 141,743	$ (92,313)	$ (6,283)	$ (70,735)

XML

Commitments and Contingencies - New Mexico Audits (Details) (Unfavorable Regulatory Action, USD $)	Sep. 30, 2014
Unfavorable Regulatory Action
Loss Contingencies [Line Items]
Minimum loss contingency range of loss	$ 129,700
Maximum loss contingency range of possible loss	$ 23,000,000

XML

Long-Term Debt and Notes Payable - Narratives (Details) (USD $)	3 Months Ended		9 Months Ended				0 Months Ended		0 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2013 Senior Loans Senior Term Loans due March 31, 2014 to December 17, 2017	Sep. 02, 2014 Syndicated Credit Facility Credit Facility, September 2, 2014	Sep. 02, 2014 Syndicated Credit Facility Credit Facility, September 2, 2014	Oct. 30, 2012 Syndicated Credit Facility Credit Facility, October 30, 2012
Debt Instrument [Line Items]
Senior terms loan						$ 600,000,000
Cross default provision, threshold amount	10,000,000		10,000,000
Maximum borrowing capacity								1,500,000,000	1,250,000,000.00
Debt Instrument, Term							5 years		5 years
Initial borrowing base	1,500,000,000		1,500,000,000		1,250,000,000			2,100,000,000
Credit facility cross default provision, threshold amount	75,000,000		75,000,000
Interest expense	11,522,000	10,149,000	27,374,000	30,232,000
Capitalized interest expense	$ 0	$ 0	$ 37,000	$ 200,000
Debt covenant, Debt to EBITDAX Ratio								4.0
Debt covenant, Current assets to Current Liabilities Ratio								1.0
Debt covenant, Minimum net present value of proved reserves to consolidated debt, Ratio								1.50
Percent, Loan Limit								10.00%

XML

Exploratory Costs (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014 well	Sep. 30, 2013	Sep. 30, 2014 well	Sep. 30, 2013	Dec. 31, 2013
Increase (Decrease) in Capitalized Exploratory Well Costs that are Pending Determination of Proved Reserves [Roll Forward]
Capitalized exploratory well costs at beginning of period	$ 166,458	$ 72,172	$ 57,600	$ 79,791
Additions pending determination of proved reserves	258,724	99,428	623,913	319,008
Reclassifications due to determination of proved reserves	(258,123)	(112,821)	(513,263)	(340,020)
Exploratory well costs charged to expense	(1,217)	0	(2,408)	0
Capitalized exploratory well costs at end of period	165,842	58,779	165,842	58,779
Exploratory wells in progress	29,059		29,059		14,794
Capitalized exploratory well costs capitalized for a period of one year or less	136,783		136,783		42,481
Capitalized exploratory well costs for a period greater than one year	0		0		1,206
Total capitalized exploratory well costs	$ 165,842		$ 165,842		$ 58,481
Number of wells in process of drilling	56		56

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Long-Term Debt and Notes Payable - Maturities of Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014
Debt Disclosure [Abstract]
Remaining 2014	$ 0
2015	0
2016	0
2017	19,000
2018	0
2019 and thereafter	$ 613,900

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Organization and Basis of Presentation (Details) (Alabama Gas Corporation, USD $)	0 Months Ended
	Aug. 31, 2014	Aug. 31, 2014
Alabama Gas Corporation
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Amount of consideration received		$ 1,600,000,000
Amount of debt assumed	267,000,000
Proceeds from sale	$ 1,320,000,000

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Rollforward of Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2013	$ (20,067)
Other comprehensive loss before reclassifications	(2,042)
Amounts reclassified from accumulated other comprehensive income (loss)	(586)
Change in accumulated other comprehensive income (loss)	(2,628)
Balance as of September 30, 2014	(22,695)
Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2013	12,178
Other comprehensive loss before reclassifications	(258)
Amounts reclassified from accumulated other comprehensive income (loss)	(8,302)
Change in accumulated other comprehensive income (loss)	(8,560)
Balance as of September 30, 2014	3,618
Pension and Postretirement Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2013	(32,245)
Other comprehensive loss before reclassifications	(1,784)
Amounts reclassified from accumulated other comprehensive income (loss)	7,716
Change in accumulated other comprehensive income (loss)	5,932
Balance as of September 30, 2014	$ (26,313)

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2014

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following fair value hierarchy tables present information about Energen’s assets and liabilities measured at fair value on a recurring basis:

	September 30, 2014
(in thousands)	Level 2			Level 3			Total
Assets:
Derivative instruments	$	16,355		$	13,840		$	30,195
Noncurrent derivative instruments	4,763			995			5,758
Total assets	21,118			14,835			35,953
Liabilities:
Derivative instruments	(1,499		)	691			(808		)
Noncurrent derivative instruments	—			(640		)	(640		)
Total liabilities	(1,499		)	51			(1,448		)
Net derivative asset	$	19,619		$	14,886		$	34,505

	December 31, 2013
(in thousands)	Level 2			Level 3			Total
Assets:
Derivative instruments	$	(1,658	)	$	19,121		$	17,463
Noncurrent derivative instruments	4,383			1,056			5,439
Total assets	2,725			20,177			22,902
Liabilities:
Derivative instruments	(28,414		)	(1,888		)	(30,302		)
Total liabilities	(28,414		)	(1,888		)	(30,302		)
Net derivative asset (liability)	$	(25,689	)	$	18,289		$	(7,400	)

Schedule of Changes in Fair Value of Derivative Instruments Classified as Level 3

The tables below set forth a summary of changes in the fair value of Energen’s Level 3 derivative commodity instruments as follows:

	Three months ended			Three months ended
(in thousands)	September 30, 2014			September 30, 2013
Balance at beginning of period	$	5,207		$	51,131
Realized gains	10,769			10,852
Unrealized gains (losses) relating to instruments held at the reporting date*	9,348			(10,947		)
Settlements during period	(10,438		)	(9,830		)
Balance at end of period	$	14,886		$	41,206

	Nine months ended			Nine months ended
(in thousands)	September 30, 2014			September 30, 2013
Balance at beginning of period	$	18,289		$	89,019
Realized gains	8,581			41,952
Unrealized losses relating to instruments held at the reporting date*	(3,734		)	(48,835		)
Settlements during period	(8,250		)	(40,930		)
Balance at end of period	$	14,886		$	41,206

*Includes $12.2 million and $9.6 million in mark-to-market gains for the three months and nine months ended September 30, 2014, respectively. Includes $0.8 million and $4.7 million in mark-to-market gains for the three months and nine months ended September 30, 2013, respectively.

Schedule of Fair Value Inputs, Derivatives, Quantitative Information

The table below sets forth quantitative information about Energen’s Level 3 fair value measurements of derivative commodity instruments as follows:

(in thousands, except price data)	Fair Value as of September 30, 2014			Valuation Technique*	Unobservable Input*	Range
Oil Basis - WTS/WTI
2014	$	1,115		Discounted Cash Flow	Forward Basis	($6.62) Bbl
2015	(181		)	Discounted Cash Flow	Forward Basis	($4.20 - $4.24) Bbl
Oil Basis - WTI/WTI
2014	$	2,736		Discounted Cash Flow	Forward Basis	($7.07 - $7.18) Bbl
2015	(1,979		)	Discounted Cash Flow	Forward Basis	($4.60 - $4.97) Bbl
Natural Gas Liquids
2014	$	1,600		Discounted Cash Flow	Forward Price	$0.67 - $0.90 Gal
Natural Gas Basis - San Juan
2014	$	4,946		Discounted Cash Flow	Forward Basis	($0.05 - $0.12) Mcf
2015	$	5,097		Discounted Cash Flow	Forward Basis	($0.09 - $0.10) Mcf
Natural Gas Basis - Permian
2014	$	(372	)	Discounted Cash Flow	Forward Basis	($0.09 - $0.10) Mcf
2015	$	1,924		Discounted Cash Flow	Forward Basis	($0.13) Mcf

*Discounted cash flow represents an income approach in calculating fair value including the referenced unobservable input and a discount reflecting credit quality of the counterparty.

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Reconciliation of Earnings Per Share (EPS) - Antidilutive Securities (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	242,560
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	6,000	0	6,000	875,000
Performance share awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	2,000	0	4,000	79,000

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- Change in Fair Value (Details) (Derivative Commodity Instruments, USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative Commodity Instruments
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Mark-to-market gain included in earnings, unrealized	$ 12,200,000		$ 9,600,000
Mark-to-market loss included in earnings, unrealized		800,000		4,700,000
Balance at beginning of period	5,207,000	51,131,000	18,289,000	89,019,000
Realized gains	10,769,000	10,852,000	8,581,000	41,952,000
Unrealized gain (losses) relating to instruments held at the reporting date	9,348,000	(10,947,000)	(3,734,000)	(48,835,000)
Settlements during period	(10,438,000)	(9,830,000)	(8,250,000)	(40,930,000)
Balance at end of period	$ 14,886,000	$ 41,206,000	$ 14,886,000	$ 41,206,000

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Derivative Commodity Instruments - Offsetting Assets and Liabilities (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Derivative assets
Gross Amounts Recognized at Fair Value	$ 43,620,000	$ 44,215,000
Gross Amounts Offset in the Balance Sheets	(7,667,000)	(21,313,000)
Total assets	35,953,000	22,902,000
Financial Instruments	0	0
Cash Collateral Received	0	0
Net Fair Value Presented in the Balance Sheets	35,953,000	22,902,000
Derivative assets
Gross Amounts Recognized at Fair Value	9,115,000	51,615,000
Gross Amounts Offset in the Balance Sheets	(7,667,000)	(21,313,000)
Net Amount Presented in the Balance Sheets	1,448,000	30,302,000
Financial Instruments	0	0
Cash Collateral Received	0	0
Net Fair Value Presented in the Balance Sheets	1,448,000	30,302,000
Total Derivatives	34,505,000	(7,400,000)
Net deferred tax liability	2,200,000	8,200,000
Current Assets
Derivative assets
Gross Amounts Recognized at Fair Value	37,039,000	36,223,000
Gross Amounts Offset in the Balance Sheets	(6,844,000)	(18,760,000)
Total assets	30,195,000	17,463,000
Financial Instruments	0	0
Cash Collateral Received	0	0
Net Fair Value Presented in the Balance Sheets	30,195,000	17,463,000
Noncurrent Assets
Derivative assets
Gross Amounts Recognized at Fair Value	6,581,000	7,992,000
Gross Amounts Offset in the Balance Sheets	(823,000)	(2,553,000)
Total assets	5,758,000	5,439,000
Financial Instruments	0	0
Cash Collateral Received	0	0
Net Fair Value Presented in the Balance Sheets	5,758,000	5,439,000
Current Liabilities
Derivative assets
Gross Amounts Recognized at Fair Value	7,652,000	49,062,000
Gross Amounts Offset in the Balance Sheets	(6,844,000)	(18,760,000)
Net Amount Presented in the Balance Sheets	808,000	30,302,000
Financial Instruments	0	0
Cash Collateral Received	0	0
Net Fair Value Presented in the Balance Sheets	808,000	30,302,000
Noncurrent Liabilities
Derivative assets
Gross Amounts Recognized at Fair Value	1,463,000	2,553,000
Gross Amounts Offset in the Balance Sheets	(823,000)	(2,553,000)
Net Amount Presented in the Balance Sheets	640,000	0
Financial Instruments	0	0
Cash Collateral Received	0	0
Net Fair Value Presented in the Balance Sheets	$ 640,000	$ 0

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Employee Benefit Plans (Details) (USD $)	1 Months Ended	3 Months Ended				9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended				1 Months Ended
	Jan. 31, 2014 Pension Plans	Sep. 30, 2014 Pension Plans	Jun. 30, 2014 Pension Plans	Mar. 31, 2014 Pension Plans	Sep. 30, 2013 Pension Plans	Sep. 30, 2014 Pension Plans	Sep. 30, 2013 Pension Plans	Sep. 30, 2014 Postretirement Benefit Plans	Sep. 30, 2013 Postretirement Benefit Plans	Sep. 30, 2014 Postretirement Benefit Plans	Sep. 30, 2013 Postretirement Benefit Plans	Sep. 30, 2014 Supplemental Employee Retirement Plan	Mar. 31, 2014 Supplemental Employee Retirement Plan	Sep. 30, 2013 Supplemental Employee Retirement Plan	Mar. 31, 2013 Supplemental Employee Retirement Plan	Oct. 31, 2014 Subsequent Event Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Reclassification of Rabbi Trust investments												$ 17,100,000
Components of net periodic benefit cost:
Service cost		1,902,000			1,326,000	5,157,000	3,980,000	87,000	111,000	206,000	334,000
Interest cost		1,157,000			1,093,000	3,974,000	3,269,000	137,000	175,000	587,000	526,000
Expected long-term return on assets		(1,157,000)			(1,321,000)	(4,067,000)	(3,966,000)	(246,000)	(212,000)	(1,016,000)	(638,000)
Actuarial (Gain) Loss		1,296,000			1,760,000	4,115,000	5,417,000	(151,000)	0	(572,000)	0
Transition amortization								9,000	63,000	39,000	189,000
Prior service cost amortization		63,000			62,000	177,000	185,000
Settlement charge		370,000			18,000	4,043,000	161,000							18,000
Net periodic expense		3,631,000			2,938,000	13,399,000	9,046,000	(164,000)	137,000	(756,000)	411,000
Employer Contributions in Current Fiscal Year, Required Contributions		7,700,000				7,700,000
Defined Benefit Plan, Contributions by Employer	3,000,000															10,000,000
Benefit payments made in current fiscal year		74,000				1,000,000
Estimated future benefit payments in current fiscal year		5,200,000				5,200,000
Settlement charges												0	400,000	64,000	500,000
Settlement charges expensed		300,000	400,000	6,900,000											100,000
Settlement charges in discontinued operations				$ 3,700,000

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Acquisition and Disposition of Properties - Held for Sale (Details) (USD $) In Millions, unless otherwise specified		3 Months Ended
	Dec. 31, 2013 Natural Gas Basis - San Juan MBoe	Sep. 30, 2014 Discontinued Operations, Held-for-sale or Disposed of by Sale Natural Gas Basis - Permian	Sep. 30, 2014 Discontinued Operations, Held-for-sale or Disposed of by Sale Natural Gas Basis - San Juan
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Non-cash impairment writedown		$ 31.2	$ 147.9
Proved Developed Reserves (Energy)	73,070

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Long-Term Debt and Notes Payable - Credit Facilities (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Debt Disclosure [Abstract]
Notes payable to banks	$ 78,900	$ 489,000
Available for borrowings	1,421,100	761,000
Total Energen	1,500,000	1,250,000
Maximum amount outstanding at any month-end	750,000	901,000
Average daily amount outstanding	$ 559,878	$ 804,895
Average daily amount outstanding interest rate	1.43%	1.38%
Amount outstanding at period-end interest rate	1.66%	1.32%

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Derivative Commodity Instruments

9 Months Ended

Sep. 30, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Commodity Instruments

DERIVATIVE COMMODITY INSTRUMENTS

We periodically enter into derivative commodity instruments to hedge our exposure to price fluctuations on oil, natural gas liquids and natural gas production. Such instruments may include over-the-counter (OTC) swaps and basis swaps typically executed with investment and commercial banks and energy-trading firms. Derivative transactions are pursuant to standing authorizations by the Board of Directors, which do not authorize speculative positions.

Due to the volatility of commodity prices, the estimated fair value of our derivative instruments is subject to fluctuation from period to period, which could result in significant differences between the current estimated fair value and the ultimate settlement price. Additionally, Energen is at risk of economic loss based upon the creditworthiness of our counterparties. We were in a net gain position with thirteen of our active counterparties and in a net loss position with the remaining one at September 30, 2014. The largest counterparty net gain positions at September 30, 2014, J.P. Morgan Ventures Energy Corporation, J Aron & Company and Bank of Montreal, constituted approximately $8.5 million, $4.4 million and $3.7 million, respectively, of Energen’s total gain on fair value of derivatives.

Prior to June 30, 2013, Energen used cash flow hedge accounting where applicable for its derivative transactions. The effective portion of the gain or loss on the derivative instrument was recognized in accumulated other comprehensive income as a component of shareholders’ equity and subsequently reclassified as gain (loss) on derivative instruments, net when the forecasted transaction affected earnings. The ineffective portion of a derivative’s change in fair value was required to be recognized immediately in gain (loss) on derivative instruments, net. All other derivative transactions not designated as cash flow hedge accounting are accounted for as mark-to-market transactions with gains or losses recognized in the period of change in gain (loss) on derivative instruments, net.

Effective March 31, 2013 and June 30, 2013, Energen dedesignated from cash flow hedge accounting 5,078 thousand barrels (MBbl) and 2,353 MBbl, respectively, of various New York Mercantile Exchange (NYMEX) oil contracts associated with the Permian Basin due to lack of correlation. Gains and losses from inception of the hedge to the dedesignation date were frozen in accumulated other comprehensive income until the forecasted transactions actually occurred. Subsequent gains or losses will be accounted for as mark-to-market transactions and recognized immediately through gain (loss) on derivative instruments, net.

Effective June 30, 2013, Energen elected to discontinue the use of cash flow hedge accounting and to dedesignate all remaining derivative commodity instruments that were previously designated as cash flow hedges. As a result of discontinuing hedge accounting, any gains or losses from inception of the hedge to June 30, 2013 were frozen in accumulated other comprehensive income until the forecasted transactions actually occurred. Any subsequent gains or losses will be accounted for as mark-to-market and recognized immediately through gain (loss) on derivative instruments, net. As a result of Energen’s election to discontinue hedge accounting, all derivative transactions entered into subsequent to June 30, 2013 will be accounted for as mark-to-market transactions with gains or losses recognized in the period of change in gain (loss) on derivative instruments, net.

The following tables detail the offsetting of derivative assets and liabilities as well as the fair values of derivatives on the balance sheets:

(in thousands)	September 30, 2014
								Gross Amounts Not Offset in the Balance Sheets
	Gross Amounts Recognized at Fair Value		Gross Amounts Offset in the Balance Sheets			Net Amount Presented in the Balance Sheets		Financial Instruments		Cash Collateral Received		Net Fair Value Presented in the Balance Sheets
Derivatives not designated as hedging instruments
Assets
Derivative instruments	$	37,039	$	(6,844	)	$	30,195	$	—	$	—	$	30,195
Noncurrent derivative instruments	6,581		(823		)	5,758		—		—		5,758
Total derivative assets	43,620		(7,667		)	35,953		—		—		35,953
Liabilities
Derivative instruments	7,652		(6,844		)	808		—		—		808
Noncurrent derivative instruments	1,463		(823		)	640		—		—		640
Total derivative liabilities	9,115		(7,667		)	1,448		—		—		1,448
Total derivatives	$	34,505	$	—		$	34,505	$	—	$	—	$	34,505

(in thousands)	December 31, 2013
										Gross Amounts Not Offset in the Balance Sheets
	Gross Amounts Recognized at Fair Value			Gross Amounts Offset in the Balance Sheets			Net Amount Presented in the Balance Sheets			Financial Instruments		Cash Collateral Received		Net Fair Value Presented in the Balance Sheets
Derivatives not designated as hedging instruments
Assets
Derivative instruments	$	36,223		$	(18,760	)	$	17,463		$	—	$	—	$	17,463
Noncurrent derivative instruments	7,992			(2,553		)	5,439			—		—		5,439
Total derivative assets	44,215			(21,313		)	22,902			—		—		22,902
Liabilities
Derivative instruments	49,062			(18,760		)	30,302			—		—		30,302
Noncurrent derivative instruments	2,553			(2,553		)	—			—		—		—
Total derivative liabilities	51,615			(21,313		)	30,302			—		—		30,302
Total derivatives	$	(7,400	)	$	—		$	(7,400	)	$	—	$	—	$	(7,400	)

Energen had a net $2.2 million and a net $8.2 million deferred tax liability included in current deferred income taxes on the balance sheets related to derivative items included in accumulated other comprehensive income as of September 30, 2014, and December 31, 2013, respectively.

The following tables detail the effect of derivative commodity instruments in cash flow hedging relationships on the financial statements:

(in thousands)	Location on Statements of Income	Three months ended September 30, 2014		Three months ended September 30, 2013
Net gain recognized in other comprehensive income on derivatives (effective portion), net of tax of $18 and $42	—	$	29	$	69
Gain reclassified from accumulated other comprehensive income into income (effective portion)	Gain (loss) on derivative instruments, net	$	5,992	$	8,455
Loss recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing)	Gain (loss) on derivative instruments, net	$	—	$	(22	)

(in thousands)	Location on Statements of Income	Nine months ended September 30, 2014		Nine months ended September 30, 2013
Net gain (loss) recognized in other comprehensive income on derivatives (effective portion), net of tax of $25 and ($6,669)	—	$	40	$	(10,882	)
Gain reclassified from accumulated other comprehensive income into income (effective portion)	Gain (loss) on derivative instruments, net	$	15,781	$	29,391
Gain recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing)	Gain (loss) on derivative instruments, net	$	—	$	835

The following tables detail the effect of open and closed derivative commodity instruments not designated as hedging instruments on the income statement:

(in thousands)	Location on Statements of Income	Three months ended September 30, 2014		Three months ended September 30, 2013
Gain (loss) recognized in income on derivatives	Gain (loss) on derivative instruments, net	$	141,743	$	(92,313	)

(in thousands)	Location on Statements of Income	Nine months ended September 30, 2014			Nine months ended September 30, 2013
Loss recognized in income on derivatives	Gain (loss) on derivative instruments, net	$	(6,283	)	$	(70,735	)

As of September 30, 2014, $3.6 million, net of tax, of deferred net gains on derivative instruments recorded in accumulated other comprehensive income are expected to be reclassified and reported in earnings as revenues during the next twelve-month period. During 2013, we had a discontinuance of hedge accounting when Energen determined it was probable certain forecasted volumes would not occur due to certain properties being sold. This discontinuance of hedge accounting resulted in $1.7 million of after-tax losses being recognized into gain (loss) on derivative instruments, net during the nine months ended September 30, 2014.

As of September 30, 2014, Energen had entered into the following transactions for the remainder of 2014 and subsequent years:

Production Period	Total Hedged Volumes		Average Contract Price	Description
Oil
2014	2,502	MBbl	$92.66 Bbl	NYMEX Swaps
2015	8,280	MBbl	$89.30 Bbl	NYMEX Swaps
Oil Basis Differential
2014	300	MBbl	$(3.30) Bbl	WTS/WTI Basis Swaps*
2014	600	MBbl	$(3.08) Bbl	WTI/WTI Basis Swaps**
2015	2,160	MBbl	$(4.30) Bbl	WTS/WTI Basis Swaps*
2015	6,120	MBbl	$(5.11) Bbl	WTI/WTI Basis Swaps**
Natural Gas Liquids
2014	18.5	MMgal	$0.93 Gal	Liquids Swaps
Natural Gas
2014	2.6	Bcf	$4.57 Mcf	NYMEX Swaps
2014	7.6	Bcf	$4.62 Mcf	Basin Specific Swaps - San Juan
2014	2.6	Bcf	$3.81 Mcf	Basin Specific Swaps - Permian
2015	23.0	Bcf	$4.13 Mcf	Basin Specific Swaps - San Juan
2015	6.0	Bcf	$4.20 Mcf	Basin Specific Swaps - Permian
Natural Gas Basis Differential
2014	1.5	Bcf	$(0.09) Mcf	San Juan Basis Swaps
2014	0.6	Bcf	$(0.17) Mcf	Permian Basis Swaps
*WTS - West Texas Sour/Midland, WTI - West Texas Intermediate/Cushing
**WTI - West Texas Intermediate/Midland, WTI - West Texas Intermediate/Cushing

As of September 30, 2014, the maximum term over which Energen has hedged exposures to the variability of cash flows is through December 31, 2015.

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Acquisition and Dispositions of Properties Narrative (Details) (San Juan, Subsequent Event, USD $) In Millions, unless otherwise specified	1 Months Ended
	Oct. 31, 2014 acre
San Juan | Subsequent Event
Gas and Oil Acreage [Line Items]
Acres of unproved leasehold, Net	15,000
Payment for unproved leasehold	$ 22.8

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- Level 3 Measurements of Derivative Commodity Instruments (Details) (USD $)			9 Months Ended			9 Months Ended			9 Months Ended			9 Months Ended			9 Months Ended			9 Months Ended			9 Months Ended			9 Months Ended			3 Months Ended		9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Level 3	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Oil Basis - WTS/WTI 2014	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Oil Basis - WTS/WTI 2015	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Oil Basis - WTS/WTI 2015 Minimum	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Oil Basis - WTS/WTI 2015 Maximum	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Oil Basis - WTI/WTI 2014	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Oil Basis - WTI/WTI 2014 Minimum	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Oil Basis - WTI/WTI 2014 Maximum	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Oil Basis - WTI/WTI 2015	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Oil Basis - WTI/WTI 2015 Minimum	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Oil Basis - WTI/WTI 2015 Maximum	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Liquids Swaps 2014	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Liquids Swaps 2014 Minimum	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Liquids Swaps 2014 Maximum	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Natural Gas Basis - San Juan 2014	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Natural Gas Basis - San Juan 2014 Minimum	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Natural Gas Basis - San Juan 2014 Maximum	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Natural Gas Basis - San Juan 2015	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Natural Gas Basis - San Juan 2015 Minimum	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Natural Gas Basis - San Juan 2015 Maximum	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Natural Gas Basis - Permian 2014	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Natural Gas Basis - Permian 2014 Minimum	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Natural Gas Basis - Permian 2014 Maximum	Sep. 30, 2014 Discounted Cash Flow Valuation Technique Level 3 Natural Gas Basis - Permian 2015	Sep. 30, 2014 Commodity contracts	Sep. 30, 2013 Commodity contracts	Sep. 30, 2014 Commodity contracts	Sep. 30, 2013 Commodity contracts
Fair Value Inputs, Derivatives, Quantitative Information [Line Items]
Gain (Loss) Recognized in other comprehensive income on derivatives																											$ 18,000	$ 42,000	$ 25,000	$ (6,669,000)
Sensitivity Analysis of Fair Value of 10 Percent Change in Commodity Prices			13,000,000
Sensitivity Analysis of Fair Value of Impact of 10 Percent Change in Mark-To-Market Derivative Contracts1			13,000,000
Derivative assets	35,953,000	22,902,000		1,115,000				2,736,000						1,600,000			4,946,000			5,097,000						1,924,000
Derivative liabilities	$ (1,448,000)	$ (30,302,000)			$ (181,000)						$ (1,979,000)												$ (372,000)
Fair Value Inputs, Price Per Barrel				6.62		4.20	4.24		7.07	7.18		4.60	4.97
Fair Value Inputs, Price Per Gallon															0.67	0.90
Fair Value Inputs, Price Per Cubic Foot																		0.05	0.12		0.09	0.10		0.09	0.10	0.13

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Exploratory Costs (Tables)

9 Months Ended

Sep. 30, 2014

Extractive Industries [Abstract]

Schedule of Capitalized Exploratory Wells

The following table sets forth capitalized exploratory well costs and includes additions pending determination of proved reserves, reclassifications to proved reserves and costs charged to expense:

	Three months ended September 30,						Nine months ended September 30,
(in thousands)	2014			2013			2014			2013
Capitalized exploratory well costs at beginning of period	$	166,458		$	72,172		$	57,600		$	79,791
Additions pending determination of proved reserves	258,724			99,428			623,913			319,008
Reclassifications due to determination of proved reserves	(258,123		)	(112,821		)	(513,263		)	(340,020		)
Exploratory well costs charged to expense	(1,217		)	—			(2,408		)	—
Capitalized exploratory well costs at end of period	$	165,842		$	58,779		$	165,842		$	58,779

The following table sets forth capitalized exploratory wells costs and includes amounts capitalized for a period greater than one year:

(in thousands)	September 30, 2014		December 31, 2013
Exploratory wells in progress	$	29,059	$	14,794
Capitalized exploratory well costs capitalized for a period of one year or less	136,783		42,481
Capitalized exploratory well costs for a period greater than one year	—		1,206
Total capitalized exploratory well costs	$	165,842	$	58,481

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Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2014

Pension Plans

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs

The components of net periodic benefit cost for Energen’s defined benefit non-contributory pension plan and certain nonqualified supplemental pension plans were as follows:

	Three months ended September 30,						Nine months ended September 30,
(in thousands)	2014			2013			2014			2013
Components of net periodic benefit cost:
Service cost	$	1,902		$	1,326		$	5,157		$	3,980
Interest cost	1,157			1,093			3,974			3,269
Expected long-term return on assets	(1,157		)	(1,321		)	(4,067		)	(3,966		)
Actuarial loss	1,296			1,760			4,115			5,417
Prior service cost amortization	63			62			177			185
Settlement charge	370			18			4,043			161
Net periodic expense	$	3,631		$	2,938		$	13,399		$	9,046

Postretirement Benefit Plans

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs

The components of net periodic postretirement benefit expense for Energen’s postretirement benefit plan were as follows:

	Three months ended September 30,						Nine months ended September 30,
(in thousands)	2014			2013			2014			2013
Components of net periodic benefit cost:
Service cost	$	87		$	111		$	206		$	334
Interest cost	137			175			587			526
Expected long-term return on assets	(246		)	(212		)	(1,016		)	(638		)
Actuarial gain	(151		)	—			(572		)	—
Transition amortization	9			63			39			189
Net periodic (income) expense	$	(164	)	$	137		$	(756	)	$	411

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Asset Retirement Obligations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance as of December 31, 2013			$ 108,533
Liabilities incurred			2,265
Liabilities settled			(1,017)
Accretion of discount on asset retirement obligations	1,924	1,771	5,650	5,187
Balance as of September 30, 2014	$ 115,431		$ 115,431

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Fair Value Measurements -Narratives (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt fair value	$ 637,300,000	$ 1,161,900,000
Reported Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt fair value	632,900,000	1,154,000,000
Credit facility | Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount	150,000,000
Interest rate	1.0425%
Credit facility | Swap | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate cash flow hedge liability at fair value	$ 1,000,000	$ 1,800,000

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Asset Retirement Obligations (Tables)

9 Months Ended

Sep. 30, 2014

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Change in Asset Retirement Obligation

The following table reflects the components of the change in Energen’s ARO balance for the nine months ended September 30, 2014:

(in thousands)
Balance as of December 31, 2013	$	108,533
Liabilities incurred	2,265
Liabilities settled	(1,017		)
Accretion expense	5,650
Balance as of September 30, 2014	$	115,431

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Accumulated Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 2014

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

The following table provides changes in the components of accumulated other comprehensive income (loss), net of the related income tax effects.

(in thousands)	Cash Flow Hedges			Pension and Postretirement Plans			Total
Balance as of December 31, 2013	$	12,178		$	(32,245	)	$	(20,067	)
Other comprehensive loss before reclassifications	(258		)	(1,784		)	(2,042		)
Amounts reclassified from accumulated other comprehensive income (loss)	(8,302		)	7,716			(586		)
Change in accumulated other comprehensive income (loss)	(8,560		)	5,932			(2,628		)
Balance as of September 30, 2014	$	3,618		$	(26,313	)	$	(22,695	)

Reclassification out of Accumulated Other Comprehensive Income

The following table provides details of the reclassifications out of accumulated other comprehensive income (loss).

	Three months ended			Three months ended
	September 30, 2014			September 30, 2013
(in thousands)	Amounts Reclassified						Line Item Where Presented
Gains (losses) on cash flow hedges:
Commodity contracts	$	5,992		$	8,433		Gain (loss) on derivative instruments, net
Interest rate swap	(247		)	(446		)	Interest expense
Total cash flow hedges	5,745			7,987
Income tax expense	(2,191		)	(3,048		)
Net of tax	3,554			4,939
Pension and postretirement plans:
Transition obligation	2			(74		)	General and administrative
Prior service cost	(74		)	(78		)	General and administrative
Actuarial losses*	(1,060		)	(2,036		)	General and administrative
Actuarial losses on settlement charges	(370		)	—			General and administrative
Actuarial losses on settlement charges*	—			(46		)	Assets held for sale with prior period comparable
Total pension and postretirement plans	(1,502		)	(2,234		)
Income tax expense	525			783
Net of tax	(977		)	(1,451		)
Total reclassifications for the period	$	2,577		$	3,488

	Nine months ended			Nine months ended
	September 30, 2014			September 30, 2013
(in thousands)	Amounts Reclassified						Line Item Where Presented
Gains (losses) on cash flow hedges:
Commodity contracts	$	15,781		$	30,226		Gain (loss) on derivative instruments, net
Interest rate swap	(2,280		)	(1,282		)	Interest expense
Total cash flow hedges	13,501			28,944
Income tax expense	(5,199		)	(11,037		)
Net of tax	8,302			17,907
Pension and postretirement plans:
Transition obligation	(17		)	(220		)	General and administrative
Prior service cost	(222		)	(235		)	General and administrative
Actuarial losses*	(3,640		)	(6,387		)	General and administrative
Actuarial losses on settlement charges	(7,992		)	—			General and administrative
Actuarial losses on settlement charges*	—			(421		)	Assets held for sale with prior period comparable
Total pension and postretirement plans	(11,871		)	(7,263		)
Income tax expense	4,155			2,542
Net of tax	(7,716		)	(4,721		)
Total reclassifications for the period	$	586		$	13,186

* In the first quarter of 2013, Energen incurred a settlement charge of $0.5 million for the payment of lump sums from the nonqualified supplemental retirement plans, of which $0.1 million was recognized in actuarial losses above and $0.4 million was recognized as a regulatory asset at Alagasco and reported in actuarial losses on settlement charges above. In the third quarter of 2013, Energen incurred a settlement charge of $64,000 for the payment of lump sums from the nonqualified supplemental retirement plans, of which $18,000 is recognized in actuarial losses above and $46,000 was recognized as a regulatory asset at Alagasco and reported in actuarial losses on settlement charges above.

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Organization and Basis of Presentation

9 Months Ended

Sep. 30, 2014

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Basis of Presentation

ORGANIZATION AND BASIS OF PRESENTATION

Energen Corporation (Energen or the Company) is an oil and natural gas exploration and production company primarily engaged in the exploration, development and production of oil and gas properties in the Permian Basin in west Texas and in the San Juan Basin in New Mexico and Colorado in the continental United States. Our operations are conducted substantially through our subsidiary Energen Resources Corporation (Energen Resources). The unaudited consolidated financial statements and notes should be read in conjunction with the financial statements and notes thereto for the years ended December 31, 2013, 2012 and 2011, included in the 2013 Annual Report of Energen and Alabama Gas Corporation (Alagasco) on Form 10-K.

Prior to September 2, 2014, Energen owned Alagasco, which was engaged in the purchase, distribution and sale of natural gas principally in central and north Alabama. On September 2, 2014, Energen completed the transaction to sell Alagasco to The Laclede Group, Inc. (Laclede) for $1.6 billion, less the assumption of $267 million in debt. The net pre-tax proceeds to Energen totaled approximately $1.32 billion, subject to closing adjustments. This sale had an effective date of August 31, 2014. Energen used cash proceeds from the sale to reduce long-term and short-term indebtedness. During the second quarter of 2014, Energen classified Alagasco as held for sale with prior period comparable and reflected the associated operating results in discontinued operations. See Note 12, Discontinued Operations, for further information regarding the sale of Alagasco.

Our accompanying unaudited consolidated financial statements include Energen and its subsidiaries and have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the disclosures required for complete financial statements. Results of operations for interim periods are not necessarily indicative of the results that may be expected for the year. In the opinion of management, the accompanying financial statements reflect all adjustments necessary to present fairly our financial position, results of operations, and cash flows for the periods and as of the dates shown. Such adjustments consist of normal recurring items. In addition, and in connection with the sale of Alagasco, we have chosen to reformat our financial statements to reflect a presentation more closely aligned with our peers in the oil and natural gas industry. As part of the financial statement reformatting, certain reclassifications were made to conform prior periods’ financial statements to the current-quarter presentation. These reclassifications primarily included further detail under operating costs and expenses. We further reclassified all commodity hedges from oil and natural gas operating revenues to gain (loss) on derivative instruments, net, as follows:

	Three months ended					Nine months ended
	September 30,					September 30,
(in thousands)	2014		2013			2014			2013
Open non-cash mark-to-market gains (losses) on derivative instruments	$	147,287	$	(63,560	)	$	53,985		$	(48,459	)
Closed gains (losses) on derivative instruments	448		(24,632		)	(44,487		)	(3,445		)
Gain (loss) on derivative instruments, net	$	147,735	$	(88,192	)	$	9,498		$	(51,904	)

We classified as discontinued operations interest on debt required to be extinguished, certain depreciation costs that ended at close, the related income tax impact of these items and the earnings of Alagasco. In addition, we reclassified from discontinued operations certain general and administrative costs, other income and the related tax impact from these items. The table below provides a detail of these items included in income (loss) from discontinued operations at September 30, 2014:

	Three months ended September 30,						Nine months ended September 30,
(in thousands)	2014			2013			2014			2013
Alagasco net income (loss)	$	(1,767	)	$	(8,961	)	$	40,646		$	37,557
Depreciation, depletion and amortization	(103		)	(150		)	(408		)	(443		)
General and administrative	1,710			1,158			3,337			4,784
Interest expense	(4,329		)	(3,676		)	(17,306		)	(9,786		)
Other income	—			(409		)	(347		)	(882		)
Income tax expense	1,029			1,145			5,567			2,392
Alagasco income (loss) from discontinued operations	(3,460		)	(10,893		)	31,489			33,622
Energen income (loss) from discontinued operations	(25		)	1,866			(1,054		)	6,269
Income (loss) from discontinued operations	$	(3,485	)	$	(9,027	)	$	30,435		$	39,891

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Discontinued Operations (Tables)

9 Months Ended

Sep. 30, 2014

Discontinued Operations and Disposal Groups [Abstract]

Schedule of Discontinued Operations

The table below provides a detail of these items included in income (loss) from discontinued operations at September 30, 2014:

	Three months ended September 30,						Nine months ended September 30,
(in thousands)	2014			2013			2014			2013
Alagasco net income (loss)	$	(1,767	)	$	(8,961	)	$	40,646		$	37,557
Depreciation, depletion and amortization	(103		)	(150		)	(408		)	(443		)
General and administrative	1,710			1,158			3,337			4,784
Interest expense	(4,329		)	(3,676		)	(17,306		)	(9,786		)
Other income	—			(409		)	(347		)	(882		)
Income tax expense	1,029			1,145			5,567			2,392
Alagasco income (loss) from discontinued operations	(3,460		)	(10,893		)	31,489			33,622
Energen income (loss) from discontinued operations	(25		)	1,866			(1,054		)	6,269
Income (loss) from discontinued operations	$	(3,485	)	$	(9,027	)	$	30,435		$	39,891

The following table details held for sale properties by major classes of assets and liabilities:

(in thousands)	December 31, 2013
	Alabama Gas Corporation			Black Warrior Basin			North Louisiana/East Texas			Total
Cash	$	3,032		$	—		$	—		$	3,032
Accounts receivable*	103,748			2,829			1,272			107,849
Inventories	41,200			—			68			41,268
Oil and gas properties	—			—			348,379			348,379
Less accumulated depreciation, depletion and amortization	—						(301,609		)	(301,609		)
Utility plant	1,491,433			—			—			1,491,433
Less accumulated depreciation	(605,924		)	—			—			(605,924		)
Other property, net	41			—			165			206
Other current assets*	29,458			—			—			29,458
Other long-term assets	128,780			—			—			128,780
Total assets held for sale	1,191,768			2,829			48,275			1,242,872
Accounts payable	(48,653		)	(1,732		)	(11		)	(50,396		)
Royalty payable	—			(550		)	(869		)	(1,419		)
Accrued taxes	(28,027		)	—			—			(28,027		)
Notes payable to banks	(50,000		)	—			—			(50,000		)
Other current liabilities*	(105,013		)	(379		)	(21		)	(105,413		)
Other long-term liabilities	(331,409		)	—			(14,983		)	(346,392		)
Long-term debt	(249,923		)	—			—			(249,923		)
Total liabilities held for sale	(813,025		)	(2,661		)	(15,884		)	(831,570		)
Total net assets held for sale	$	378,743		$	168		$	32,391		$	411,302

*At December 31, 2013, Alagasco’s accounts receivable included a consolidating adjustment of $4.7 million to adjust for affiliated companies receivables. Certain other current assets and other current liabilities at Alagasco of $1.6 million and $0.5 million, respectively, were reclassified to continuing operations at Energen.

	Three months ended						Nine months ended
	September 30,						September 30,
(in thousands, except per share data)	2014			2013			2014		2013
Natural gas distribution revenues	$	39,874		$	48,368		$	397,648	$	390,567
Oil and natural gas revenues	6			18,258			5,217		55,483
Total revenues	$	39,880		$	66,626		$	402,865	$	446,050
Pretax income (loss) from discontinued operations	$	(5,938	)	$	(14,677	)	$	48,581	$	64,098
Income tax expense (benefit)	(2,453		)	(5,650		)	18,146		24,207
Income (Loss) From Discontinued Operations	$	(3,485	)	$	(9,027	)	$	30,435	$	39,891
Gain (loss) on disposal of discontinued operations	$	726,410		$	(24,612	)	$	724,743	$	(24,612	)
Income tax expense (benefit)	286,305			(8,934		)	285,688		(8,934		)
Gain (Loss) on Disposal of Discontinued Operations	$	440,105		$	(15,678	)	$	439,055	$	(15,678	)
Total Income (Loss) From Discontinued Operations	$	436,620		$	(24,705	)	$	469,490	$	24,213
Diluted Earnings Per Average Common Share
Income (loss) from discontinued operations	$	(0.05	)	$	(0.12	)	$	0.42	$	0.55
Gain (loss) on disposal of discontinued operations	5.99			(0.22		)	5.99		(0.21		)
Total Income (Loss) From Discontinued Operations	$	5.94		$	(0.34	)	$	6.41	$	0.34
Basic Earnings Per Average Common Share
Income (loss) from discontinued operations	$	(0.05	)	$	(0.12	)	$	0.42	$	0.55
Gain (loss) on disposal of discontinued operations	6.03			(0.22		)	6.03		(0.21		)
Total Income (Loss) From Discontinued Operations	$	5.98		$	(0.34	)	$	6.45	$	0.34

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Derivative Commodity Instruments Derivative Commodity - Reclassification (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivatives, Fair Value [Line Items]
Reclassification from comprehensive income, net of tax			$ 3,600,000
Revenue, Net	(497,761,000)	(272,038,000)	(1,065,136,000)	(875,350,000)
Production Period, Year One | NYMEX Swaps | Crude Oil
Derivatives, Fair Value [Line Items]
Total Hedged Volumes	2,502,000		2,502,000
Average contract price			92.66
Production Period, Year One | NYMEX Swaps | Natural Gas
Derivatives, Fair Value [Line Items]
Total Hedged Volumes	2,600,000.0		2,600,000.0
Average contract price ($ per Mcf)			4.57
Production Period, Year One | WTS/WTI Basis Swaps | Crude Oil
Derivatives, Fair Value [Line Items]
Total Hedged Volumes	300,000		300,000
Average contract price			(3.30)
Production Period, Year One | WTI/WTI Basis Swaps | Crude Oil
Derivatives, Fair Value [Line Items]
Total Hedged Volumes	600,000		600,000
Average contract price			(3.08)
Production Period, Year One | Liquids Swaps | Natural Gas Liquids
Derivatives, Fair Value [Line Items]
Total Hedged Volumes	18,500,000.0		18,500,000.0
Average contract price			0.93
Production Period, Year One | Basin Specific Swaps, San Juan | Natural Gas
Derivatives, Fair Value [Line Items]
Total Hedged Volumes	7,580,000.00		7,580,000.00
Average contract price ($ per Mcf)			4.62
Production Period, Year One | Basin Specific Swaps - Permain | Natural Gas
Derivatives, Fair Value [Line Items]
Total Hedged Volumes	2,600,000.0		2,600,000.0
Average contract price ($ per Mcf)			3.81
Production Period, Year One | San Juan Basis Swaps | Natural Gas
Derivatives, Fair Value [Line Items]
Total Hedged Volumes	1.48		1.48
Average contract price ($ per Mcf)			(0.09)
Production Period, Year One | Permian Basis Swaps | Natural Gas
Derivatives, Fair Value [Line Items]
Total Hedged Volumes	0.6		0.6
Average contract price ($ per Mcf)			(0.17)
Production Period, Year Two | NYMEX Swaps | Crude Oil
Derivatives, Fair Value [Line Items]
Total Hedged Volumes	8,280,000		8,280,000
Average contract price			89.30
Production Period, Year Two | WTS/WTI Basis Swaps | Crude Oil
Derivatives, Fair Value [Line Items]
Total Hedged Volumes	2,160,000		2,160,000
Average contract price			(4.30)
Production Period, Year Two | WTI/WTI Basis Swaps | Crude Oil
Derivatives, Fair Value [Line Items]
Total Hedged Volumes	6,120,000		6,120,000
Average contract price			(5.11)
Production Period, Year Two | Basin Specific Swaps, San Juan | Natural Gas
Derivatives, Fair Value [Line Items]
Total Hedged Volumes	23,000,000		23,000,000
Average contract price ($ per Mcf)			4.13
Production Period, Year Two | Basin Specific Swaps - Permain | Natural Gas
Derivatives, Fair Value [Line Items]
Total Hedged Volumes	6,000,000		6,000,000
Average contract price ($ per Mcf)			4.20
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Gain from Discontinued Hedge Accounting
Derivatives, Fair Value [Line Items]
Revenue, Net			$ 1,700,000

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Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014 pit
Crude Oil and Natural Gas
Long-term Purchase Commitment [Line Items]
Oil And Gas Delivery Commitments And Contracts, Remaining Contractual Amount (BOE)	6,000
Mitchell County, Texas [Member]
Long-term Purchase Commitment [Line Items]
Environmental Exit Costs, Number of Sites	9
Environmental Exit Costs, Anticipated Cost	$ 4.1
Accrual for Environmental Loss Contingencies, Payments	$ 3.4

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Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current Assets
Cash and cash equivalents	$ 1,321	$ 2,523
Short-term investments	18,000	0
Accounts receivable, net of allowance for doubtful accounts of $681 and $696 at September 30, 2014 and December 31, 2013, respectively	185,342	136,334
Inventories	14,373	11,130
Assets held for sale with prior period comparable	0	1,242,872
Deferred income taxes	8,085	21,250
Derivative instruments	30,195	17,463
Prepayments and other	31,205	9,989
Total current assets	288,521	1,441,561
Oil and natural gas properties, successful efforts method
Proved properties	7,635,488	6,695,400
Unproved properties	158,500	168,975
Less accumulated depreciation, depletion and amortization	2,336,114	1,776,802
Oil and natural gas properties, net	5,457,874	5,087,573
Other property and equipment, net	43,355	30,515
Total property, plant and equipment, net	5,501,229	5,118,088
Other Assets
Other postretirement assets	4,566	8,894
Noncurrent derivative instruments	5,758	5,439
Other assets	32,896	48,230
TOTAL ASSETS	5,832,970	6,622,212
Current Liabilities
Long-term debt due within one year	0	60,000
Notes payable to banks	0	489,000
Accounts payable	110,955	78,178
Accrued taxes	227,180	8,201
Accrued wages and benefits	39,515	27,036
Accrued capital costs	131,792	93,623
Revenue and royalty payable	65,271	51,519
Liabilities related to assets held for sale with prior period comparable	0	831,570
Derivative instruments	808	30,302
Other	17,917	21,796
Total current liabilities	593,438	1,691,225
Deferred Credits and Other Liabilities
Long-term debt	632,458	1,093,541
Asset retirement obligations	115,431	108,533
Pension liabilities	41,264	47,484
Deferred income taxes	1,074,690	807,614
Noncurrent derivative instruments	640	398
Other long-term liabilities	13,801	15,398
Total liabilities	2,471,722	3,764,193
Commitments and Contingencies
Shareholders’ Equity
Preferred stock, cumulative, $0.01 par value, 5,000,000 shares authorized	0	0
Common shareholders’ equity
Common stock, $0.01 par value; 150,000,000 shares authorized; 76,098,344 shares and 75,574,156 shares issued at September 30, 2014 and December 31, 2013, respectively	761	756
Premium on capital stock	561,826	523,711
Retained earnings	2,946,390	2,476,616
Accumulated other comprehensive income (loss), net of tax
Unrealized gain on hedges, net	3,618	13,362
Pension and postretirement plans	(26,313)	(32,245)
Interest rate swap	0	(1,184)
Deferred compensation plan	3,320	3,259
Treasury stock, at cost; 2,986,201 shares and 2,967,999 shares at September 30, 2014 and December 31, 2013, respectively	(128,354)	(126,256)
Total shareholders’ equity	3,361,248	2,858,019
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 5,832,970	$ 6,622,212

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Long-Term Debt and Notes Payable - Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified																							9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Credit facility	Dec. 31, 2013 Credit facility	Sep. 30, 2014 Medium-term Notes 7.40% Medium-term Notes, Series A, due July 24, 2017	Dec. 31, 2013 Medium-term Notes 7.40% Medium-term Notes, Series A, due July 24, 2017	Sep. 30, 2014 Medium-term Notes 7.36% Medium-term Notes, Series A, due July 24, 2017	Dec. 31, 2013 Medium-term Notes 7.36% Medium-term Notes, Series A, due July 24, 2017	Sep. 30, 2014 Medium-term Notes 7.23% Medium-term Notes, Series A, due July 28, 2017	Dec. 31, 2013 Medium-term Notes 7.23% Medium-term Notes, Series A, due July 28, 2017	Sep. 30, 2014 Medium-term Notes 7.32% Medium-term Notes, Series A, due July 28, 2022	Dec. 31, 2013 Medium-term Notes 7.32% Medium-term Notes, Series A, due July 28, 2022	Sep. 30, 2014 Medium-term Notes 7.60% Medium-term Notes, Series A, due July 26, 2027	Dec. 31, 2013 Medium-term Notes 7.60% Medium-term Notes, Series A, due July 26, 2027	Sep. 30, 2014 Medium-term Notes 7.35% Medium-term Notes, Series A, due July 28, 2027	Dec. 31, 2013 Medium-term Notes 7.35% Medium-term Notes, Series A, due July 28, 2027	Sep. 30, 2014 Medium-term Notes 7.125% Medium-term Notes, Series B, due February 15, 2028	Dec. 31, 2013 Medium-term Notes 7.125% Medium-term Notes, Series B, due February 15, 2028	Sep. 30, 2014 Notes Payable 4.625% Notes, due September 1, 2021	Dec. 31, 2013 Notes Payable 4.625% Notes, due September 1, 2021	Sep. 30, 2014 Senior Term Loans Senior Term Loans, (floating rate interest LIBOR plus 1.625%)	Dec. 31, 2013 Senior Term Loans Senior Term Loans, (floating rate interest LIBOR plus 1.625%)	Sep. 30, 2014 London Interbank Offered Rate (LIBOR) Senior Term Loans Senior Term Loans, (floating rate interest LIBOR plus 1.625%)
Debt Instrument [Line Items]
Gross amount	$ 632,900	$ 1,154,000	$ 78,900	$ 0	$ 2,000	$ 2,000	$ 15,000	$ 15,000	$ 2,000	$ 2,000	$ 20,000	$ 20,000	$ 5,000	$ 5,000	$ 10,000	$ 10,000	$ 100,000	$ 100,000	$ 400,000	$ 400,000	$ 0	$ 600,000
Less amounts due within one year	0	60,000
Less unamortized debt discount	442	459
Long-term debt	$ 632,458	$ 1,093,541
Interest Rate					7.40%		7.36%		7.23%		7.32%		7.60%		7.35%		7.125%		4.625%
Floating rate interest spread																							1.625%

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Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Amortization of net obligation at transition, tax	$ (1)	$ 26	$ 6	$ 77
Amortization of prior service cost, tax	26	28	78	82
Amortization of net loss, including settlement charges, tax	500	729	4,071	2,383
Current period change in fair value of pension, tax	190	2,238	(962)	2,238
Commodity contracts
Current period change in fair value of interest rate swap, tax	18	42	25	(6,669)
Reclassification adjustment for derivative instruments, tax	(2,277)	(3,205)	(5,997)	(11,486)
Interest rate swap
Current period change in fair value of interest rate swap, tax	0	(188)	(160)	(23)
Reclassification adjustment for derivative instruments, tax	$ 86	$ 156	$ 798	$ 449

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Discontinued Operations Narrative (Details) (USD $)	0 Months Ended		0 Months Ended			3 Months Ended					1 Months Ended
	Sep. 02, 2014 Syndicated Credit Facility Credit Facility, September 2, 2014	Sep. 02, 2014 Syndicated Credit Facility Credit Facility, September 2, 2014	Oct. 30, 2012 Syndicated Credit Facility Credit Facility, October 30, 2012	Aug. 31, 2014 Alabama Gas Corporation	Aug. 31, 2014 Alabama Gas Corporation	Mar. 31, 2014 North Louisiana and East Texas Natural Gas and Oil Properties	Dec. 31, 2013 North Louisiana and East Texas Natural Gas and Oil Properties	Sep. 30, 2013 North Louisiana and East Texas Natural Gas and Oil Properties	Dec. 31, 2013 North Louisiana and East Texas Natural Gas and Oil Properties Natural Gas Mcf	Dec. 31, 2013 North Louisiana and East Texas Natural Gas and Oil Properties Oil MBbls	Oct. 31, 2013 Black Warrior Basin Properties Alabama	Dec. 31, 2012 Black Warrior Basin Properties Alabama Natural Gas Mcf
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Amount of consideration received					$ 1,600,000,000
Amount of debt assumed				267,000,000
Proceeds from sale				1,320,000,000
Sale price of gas and oil properties						30,300,000
Impairment of oil and gas properties held-for-sale						1,700,000	5,200,000	24,600,000
Proved Developed Reserves (Volume)									23,000,000	91		97,000,000
Proceeds from the sale of oil and gas property											160,000,000
Gain on disposition of oil and gas property											35,000,000
Maximum borrowing capacity		$ 1,500,000,000	$ 1,250,000,000.00
Debt Instrument, Term	5 years		5 years

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Organization and Basis of Presentation - Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (Loss) From Discontinued Operations	$ 436,620	$ (24,705)	$ 469,490	$ 24,213
Income (Loss) From Discontinued Operations	(3,485)	(9,027)	30,435	39,891
Alabama Gas Corporation
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Alagasco net income (loss)	(1,767)	(8,961)	40,646	37,557
Depreciation, depletion and amortization	(103)	(150)	(408)	(443)
General and administrative	1,710	1,158	3,337	4,784
Interest expense	(4,329)	(3,676)	(17,306)	(9,786)
Other income	0	(409)	(347)	(882)
Income tax expense	1,029	1,145	5,567	2,392
Income (Loss) From Discontinued Operations	(3,460)	(10,893)	31,489	33,622
Parent Company
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (Loss) From Discontinued Operations	$ (25)	$ 1,866	$ (1,054)	$ 6,269

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Recently Issued Accounting Standards (Policies)

9 Months Ended

Sep. 30, 2014

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

New Accounting Pronouncements, Policy

RECENTLY ISSUED ACCOUNTING STANDARDS

In April 2014, the Financial Accounting Standards Board issued Accounting Standards Update (ASU) No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. This update defines a discontinued operation as a disposal of a component or a group of components that is disposed of or is classified as held for sale and represents a strategic shift that has (or will have) a major effect on an entity’s operations and financial results. The amendment is effective for all annual periods beginning on or after December 15, 2014, and interim periods within those annual periods. Energen is currently evaluating the impact of the adoption of this ASU on its classification of future dispositions as discontinued operations.

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Derivative Commodity Instruments - Commodity Contracts by Business Segment (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014 counterparty	Sep. 30, 2013	Sep. 30, 2014 counterparty	Sep. 30, 2013	Jun. 30, 2013 bbl	Mar. 31, 2013 bbl
Derivative [Line Items]
Gain (Loss) on fair value of derivatives	$ 147,735	$ (88,192)	$ 9,498	$ (51,904)
Counterparties with whom company holds net gain positions	13		13
Counterparties with whom company holds net loss positions	1		1
Derivatives Transferred to Not Designated as Hedging Instruments					2,353,000	5,078,000
Commodity contracts
Derivative [Line Items]
Gain (Loss) on fair value of derivatives	147,735	(88,192)	9,498	(51,904)
Commodity contracts | J.P Morgan Ventures
Derivative [Line Items]
Gain (Loss) on fair value of derivatives			8,500
Commodity contracts | J Aron and Company
Derivative [Line Items]
Gain (Loss) on fair value of derivatives			4,400
Commodity contracts | Bank of Montreal
Derivative [Line Items]
Gain (Loss) on fair value of derivatives			$ 3,700

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Derivative Commodity Instruments Derivative Commodity Instruments (Tables)

9 Months Ended

Sep. 30, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Liabilities at Fair Value

The following tables detail the offsetting of derivative assets and liabilities as well as the fair values of derivatives on the balance sheets:

(in thousands)	September 30, 2014
								Gross Amounts Not Offset in the Balance Sheets
	Gross Amounts Recognized at Fair Value		Gross Amounts Offset in the Balance Sheets			Net Amount Presented in the Balance Sheets		Financial Instruments		Cash Collateral Received		Net Fair Value Presented in the Balance Sheets
Derivatives not designated as hedging instruments
Assets
Derivative instruments	$	37,039	$	(6,844	)	$	30,195	$	—	$	—	$	30,195
Noncurrent derivative instruments	6,581		(823		)	5,758		—		—		5,758
Total derivative assets	43,620		(7,667		)	35,953		—		—		35,953
Liabilities
Derivative instruments	7,652		(6,844		)	808		—		—		808
Noncurrent derivative instruments	1,463		(823		)	640		—		—		640
Total derivative liabilities	9,115		(7,667		)	1,448		—		—		1,448
Total derivatives	$	34,505	$	—		$	34,505	$	—	$	—	$	34,505

(in thousands)	December 31, 2013
										Gross Amounts Not Offset in the Balance Sheets
	Gross Amounts Recognized at Fair Value			Gross Amounts Offset in the Balance Sheets			Net Amount Presented in the Balance Sheets			Financial Instruments		Cash Collateral Received		Net Fair Value Presented in the Balance Sheets
Derivatives not designated as hedging instruments
Assets
Derivative instruments	$	36,223		$	(18,760	)	$	17,463		$	—	$	—	$	17,463
Noncurrent derivative instruments	7,992			(2,553		)	5,439			—		—		5,439
Total derivative assets	44,215			(21,313		)	22,902			—		—		22,902
Liabilities
Derivative instruments	49,062			(18,760		)	30,302			—		—		30,302
Noncurrent derivative instruments	2,553			(2,553		)	—			—		—		—
Total derivative liabilities	51,615			(21,313		)	30,302			—		—		30,302
Total derivatives	$	(7,400	)	$	—		$	(7,400	)	$	—	$	—	$	(7,400	)

Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location

The following tables detail the effect of derivative commodity instruments in cash flow hedging relationships on the financial statements:

(in thousands)	Location on Statements of Income	Three months ended September 30, 2014		Three months ended September 30, 2013
Net gain recognized in other comprehensive income on derivatives (effective portion), net of tax of $18 and $42	—	$	29	$	69
Gain reclassified from accumulated other comprehensive income into income (effective portion)	Gain (loss) on derivative instruments, net	$	5,992	$	8,455
Loss recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing)	Gain (loss) on derivative instruments, net	$	—	$	(22	)

(in thousands)	Location on Statements of Income	Nine months ended September 30, 2014		Nine months ended September 30, 2013
Net gain (loss) recognized in other comprehensive income on derivatives (effective portion), net of tax of $25 and ($6,669)	—	$	40	$	(10,882	)
Gain reclassified from accumulated other comprehensive income into income (effective portion)	Gain (loss) on derivative instruments, net	$	15,781	$	29,391
Gain recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing)	Gain (loss) on derivative instruments, net	$	—	$	835

Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location

The following tables detail the effect of open and closed derivative commodity instruments not designated as hedging instruments on the income statement:

(in thousands)	Location on Statements of Income	Three months ended September 30, 2014		Three months ended September 30, 2013
Gain (loss) recognized in income on derivatives	Gain (loss) on derivative instruments, net	$	141,743	$	(92,313	)

(in thousands)	Location on Statements of Income	Nine months ended September 30, 2014			Nine months ended September 30, 2013
Loss recognized in income on derivatives	Gain (loss) on derivative instruments, net	$	(6,283	)	$	(70,735	)

Schedule of Hedging Transactions

As of September 30, 2014, Energen had entered into the following transactions for the remainder of 2014 and subsequent years:

Production Period	Total Hedged Volumes		Average Contract Price	Description
Oil
2014	2,502	MBbl	$92.66 Bbl	NYMEX Swaps
2015	8,280	MBbl	$89.30 Bbl	NYMEX Swaps
Oil Basis Differential
2014	300	MBbl	$(3.30) Bbl	WTS/WTI Basis Swaps*
2014	600	MBbl	$(3.08) Bbl	WTI/WTI Basis Swaps**
2015	2,160	MBbl	$(4.30) Bbl	WTS/WTI Basis Swaps*
2015	6,120	MBbl	$(5.11) Bbl	WTI/WTI Basis Swaps**
Natural Gas Liquids
2014	18.5	MMgal	$0.93 Gal	Liquids Swaps
Natural Gas
2014	2.6	Bcf	$4.57 Mcf	NYMEX Swaps
2014	7.6	Bcf	$4.62 Mcf	Basin Specific Swaps - San Juan
2014	2.6	Bcf	$3.81 Mcf	Basin Specific Swaps - Permian
2015	23.0	Bcf	$4.13 Mcf	Basin Specific Swaps - San Juan
2015	6.0	Bcf	$4.20 Mcf	Basin Specific Swaps - Permian
Natural Gas Basis Differential
2014	1.5	Bcf	$(0.09) Mcf	San Juan Basis Swaps
2014	0.6	Bcf	$(0.17) Mcf	Permian Basis Swaps
*WTS - West Texas Sour/Midland, WTI - West Texas Intermediate/Cushing
**WTI - West Texas Intermediate/Midland, WTI - West Texas Intermediate/Cushing

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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Statement of Cash Flows [Abstract]
Cash and cash equivalents	$ 1,321	$ 12,413
Operating Activities
Net Income (Loss)	502,614	120,461
Income from discontinued operations	(469,490)	(24,213)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	399,568	332,247
Asset impairment	179,074	0
Accretion of discount on asset retirement obligations	5,650	5,187
Deferred income taxes	287,855	58,665
Change in derivative fair value	(53,928)	53,581
(Gain) loss on sale of assets	105	(91)
Stock-based compensation expense	10,837	11,200
Exploration, including dry holes	10,808	8,759
Discontinued operations	112,180	149,462
Other, net	(1,972)	10,013
Net change in:
Accounts receivable	(28,486)	31,051
Inventories	(3,243)	7,836
Accounts payable	27,967	(58,003)
Income taxes	(266,229)	16,061
Pension and other postretirement benefit contributions	(2,397)	(5,484)
Other current assets and liabilities	(1,625)	11,284
Net cash provided by operating activities	709,288	728,016
Investing Activities
Additions to oil and natural gas properties	(906,166)	(894,713)
Acquisitions, net of cash acquired	(26,371)	(21,400)
Proceeds from sale of Alabama Gas Corporation and other assets	1,347,904	2,382
Purchase of short-term investments	(377,000)	0
Sale of short-term investments	359,000	0
Discontinued operations	(51,850)	(54,052)
Other, net	0	(405)
Net cash provided by (used in) investing activities	345,517	(968,188)
Financing Activities
Payment of dividends on common stock	(32,840)	(31,454)
Issuance of common stock	23,053	13,680
Reduction of long-term debt	(600,000)	0
Payment of debt issuance costs	(7,912)	0
Net change in credit facility	(410,100)	286,000
Tax benefit on stock compensation	3,873	2,710
Discontinued operations	(35,113)	(28,055)
Net cash provided by (used in) financing activities	(1,059,039)	242,881
Net increase (decrease) in cash and cash equivalents	(4,234)	2,709
Cash and cash equivalents at beginning of period	$ 5,555	$ 9,704

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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current Assets
Allowance for doubtful accounts	$ 681	$ 696
Shareholders’ Equity
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	76,098,344	75,574,156
Treasury stock, shares	2,986,201	2,967,999

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Asset Retirement Obligations

9 Months Ended

Sep. 30, 2014

Asset Retirement Obligation Disclosure [Abstract]

Asset Retirement Obligations

ASSET RETIREMENT OBLIGATIONS

Energen’s asset retirement obligations (ARO) primarily relate to the future plugging, abandonment and reclamation of wells and facilities. We recognize a liability for the fair value of the ARO in the periods incurred. The ARO fair value liability is determined by calculating the present value of the estimated future cash outflows we expect to incur to plug, abandon and reclaim our producing properties at the end of their productive lives, and is recognized on a discounted basis incorporating an estimate of performance risk specific to Energen. Subsequent to initial measurement, liabilities are accreted to their present value and capitalized costs are depreciated over the estimated useful lives of the related assets. Upon settlement of the liability, Energen may recognize a gain or loss for differences between estimated and actual settlement costs.

The following table reflects the components of the change in Energen’s ARO balance for the nine months ended September 30, 2014:

(in thousands)
Balance as of December 31, 2013	$	108,533
Liabilities incurred	2,265
Liabilities settled	(1,017		)
Accretion expense	5,650
Balance as of September 30, 2014	$	115,431

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Document and Entity Information	9 Months Ended
	Sep. 30, 2014	Oct. 31, 2014
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q3
Entity Registrant Name	ENERGEN CORP
Entity Central Index Key	0000277595
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		73,203,569

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Accumulated Other Comprehensive Income (Loss)

9 Months Ended

Sep. 30, 2014

Equity [Abstract]

Accumulated Other Comprehensive Income (Loss)

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

The following table provides changes in the components of accumulated other comprehensive income (loss), net of the related income tax effects.

(in thousands)	Cash Flow Hedges			Pension and Postretirement Plans			Total
Balance as of December 31, 2013	$	12,178		$	(32,245	)	$	(20,067	)
Other comprehensive loss before reclassifications	(258		)	(1,784		)	(2,042		)
Amounts reclassified from accumulated other comprehensive income (loss)	(8,302		)	7,716			(586		)
Change in accumulated other comprehensive income (loss)	(8,560		)	5,932			(2,628		)
Balance as of September 30, 2014	$	3,618		$	(26,313	)	$	(22,695	)

The following table provides details of the reclassifications out of accumulated other comprehensive income (loss).

	Three months ended			Three months ended
	September 30, 2014			September 30, 2013
(in thousands)	Amounts Reclassified						Line Item Where Presented
Gains (losses) on cash flow hedges:
Commodity contracts	$	5,992		$	8,433		Gain (loss) on derivative instruments, net
Interest rate swap	(247		)	(446		)	Interest expense
Total cash flow hedges	5,745			7,987
Income tax expense	(2,191		)	(3,048		)
Net of tax	3,554			4,939
Pension and postretirement plans:
Transition obligation	2			(74		)	General and administrative
Prior service cost	(74		)	(78		)	General and administrative
Actuarial losses*	(1,060		)	(2,036		)	General and administrative
Actuarial losses on settlement charges	(370		)	—			General and administrative
Actuarial losses on settlement charges*	—			(46		)	Assets held for sale with prior period comparable
Total pension and postretirement plans	(1,502		)	(2,234		)
Income tax expense	525			783
Net of tax	(977		)	(1,451		)
Total reclassifications for the period	$	2,577		$	3,488

	Nine months ended			Nine months ended
	September 30, 2014			September 30, 2013
(in thousands)	Amounts Reclassified						Line Item Where Presented
Gains (losses) on cash flow hedges:
Commodity contracts	$	15,781		$	30,226		Gain (loss) on derivative instruments, net
Interest rate swap	(2,280		)	(1,282		)	Interest expense
Total cash flow hedges	13,501			28,944
Income tax expense	(5,199		)	(11,037		)
Net of tax	8,302			17,907
Pension and postretirement plans:
Transition obligation	(17		)	(220		)	General and administrative
Prior service cost	(222		)	(235		)	General and administrative
Actuarial losses*	(3,640		)	(6,387		)	General and administrative
Actuarial losses on settlement charges	(7,992		)	—			General and administrative
Actuarial losses on settlement charges*	—			(421		)	Assets held for sale with prior period comparable
Total pension and postretirement plans	(11,871		)	(7,263		)
Income tax expense	4,155			2,542
Net of tax	(7,716		)	(4,721		)
Total reclassifications for the period	$	586		$	13,186

* In the first quarter of 2013, Energen incurred a settlement charge of $0.5 million for the payment of lump sums from the nonqualified supplemental retirement plans, of which $0.1 million was recognized in actuarial losses above and $0.4 million was recognized as a regulatory asset at Alagasco and reported in actuarial losses on settlement charges above. In the third quarter of 2013, Energen incurred a settlement charge of $64,000 for the payment of lump sums from the nonqualified supplemental retirement plans, of which $18,000 is recognized in actuarial losses above and $46,000 was recognized as a regulatory asset at Alagasco and reported in actuarial losses on settlement charges above.

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Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues
Oil, natural gas liquids and natural gas sales	$ 350,773	$ 360,507	$ 1,057,447	$ 927,746
Gain (loss) on derivative instruments, net	147,735	(88,192)	9,498	(51,904)
Loss on sale of assets and other	(747)	(277)	(1,809)	(492)
Total revenues	497,761	272,038	1,065,136	875,350
Operating Costs and Expenses
Oil, natural gas liquids and natural gas production	67,720	65,795	199,861	190,944
Production and ad valorem taxes	25,729	22,230	81,102	69,109
Depreciation, depletion and amortization	139,104	124,911	399,568	332,247
Asset impairment	179,074	0	179,074	0
Exploration	8,255	8,949	23,644	13,902
General and administrative	27,784	30,947	93,499	86,699
Accretion of discount on asset retirement obligations	1,924	1,771	5,650	5,187
Total costs and expenses	449,590	254,603	982,398	698,088
Operating Income	48,171	17,435	82,738	177,262
Other Income (Expense)
Interest expense	(11,522)	(10,149)	(27,374)	(30,232)
Other income	37	1,249	1,047	2,619
Total other expense	(11,485)	(8,900)	(26,327)	(27,613)
Income From Continuing Operations Before Income Taxes	36,686	8,535	56,411	149,649
Income tax expense	16,055	3,128	23,287	53,401
Income From Continuing Operations	20,631	5,407	33,124	96,248
Discontinued Operations, net of tax
Income (loss) from discontinued operations	(3,485)	(9,027)	30,435	39,891
Gain (loss) on disposal of discontinued operations	440,105	(15,678)	439,055	(15,678)
Income (Loss) From Discontinued Operations	436,620	(24,705)	469,490	24,213
Net Income (Loss)	$ 457,251	$ (19,298)	$ 502,614	$ 120,461
Diluted Earnings Per Average Common Share
Continuing operations (in dollars per share)	$ 0.28	$ 0.07	$ 0.45	$ 1.33
Discontinued operations (in dollars per share)	$ 5.94	$ (0.34)	$ 6.41	$ 0.34
Net Income (Loss) (in dollars per share)	$ 6.22	$ (0.27)	$ 6.86	$ 1.67
Basic Earnings Per Average Common Share
Continuing Operations (in dollars per share)	$ 0.28	$ 0.07	$ 0.45	$ 1.33
Discontinued operations (in dollars per share)	$ 5.98	$ (0.34)	$ 6.45	$ 0.34
Net Income (Loss) (in dollars per share)	$ 6.26	$ (0.27)	$ 6.90	$ 1.67
Dividends Per Common (In dollar per shares)	$ 0.15	$ 0.145	$ 0.45	$ 0.435
Diluted Shares Outstanding (in shares)	73,507	72,346	73,238	72,272
Basic Shares Outstanding (in shares)	73,093	72,346	72,861	72,220

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Reconciliation of Earnings Per Share (EPS)

9 Months Ended

Sep. 30, 2014

Earnings Per Share [Abstract]

Reconciliation of Earnings Per Share (EPS)

RECONCILIATION OF EARNINGS PER SHARE (EPS)

	Three months ended					Three months ended
(in thousands, except per share amounts)	September 30, 2014					September 30, 2013
	Net			Per Share		Net				Per Share
	Income		Shares	Amount		Income			Shares	Amount
Basic EPS	$	457,251	73,093	$	6.26	$	(19,298	)	72,346	$	(0.27	)
Effect of dilutive securities
Stock options			231						—
Non-vested restricted stock			68						—
Performance share awards			115						—
Diluted EPS	$	457,251	73,507	$	6.22	$	(19,298	)	72,346	$	(0.27	)

In periods of loss, shares that otherwise would have been included in diluted average common shares outstanding are excluded. The Company had 242,560 of excluded shares for the three months ended September 30, 2013.

	Nine months ended					Nine months ended
(in thousands, except per share amounts)	September 30, 2014					September 30, 2013
	Net			Per Share		Net			Per Share
	Income		Shares	Amount		Income		Shares	Amount
Basic EPS	$	502,614	72,861	$	6.90	$	120,461	72,220	$	1.67
Effect of dilutive securities
Stock options			219					41
Non-vested restricted stock			67					10
Performance share awards			91					1
Diluted EPS	$	502,614	73,238	$	6.86	$	120,461	72,272	$	1.67

Energen had the following shares that were excluded from the computation of diluted EPS, as inclusion would be anti-dilutive:

	Three months ended September 30,		Nine months ended September 30,
(in thousands)	2014	2013	2014	2013
Stock options	6	—	6	875
Performance share awards	2	—	4	79

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Long-Term Debt and Notes Payable

9 Months Ended

Sep. 30, 2014

Debt Disclosure [Abstract]

Long-Term Debt and Notes Payable

LONG-TERM DEBT AND NOTES PAYABLE

Long-term debt consisted of the following:

(in thousands)	September 30, 2014		December 31, 2013
Credit facility	$	78,900	$	—
7.40% Medium-term Notes, Series A, due July 24, 2017	2,000		2,000
7.36% Medium-term Notes, Series A, due July 24, 2017	15,000		15,000
7.23% Medium-term Notes, Series A, due July 28, 2017	2,000		2,000
7.32% Medium-term Notes, Series A, due July 28, 2022	20,000		20,000
7.60% Medium-term Notes, Series A, due July 26, 2027	5,000		5,000
7.35% Medium-term Notes, Series A, due July 28, 2027	10,000		10,000
7.125% Medium-term Notes, Series B, due February 15, 2028	100,000		100,000
4.625% Notes, due September 1, 2021	400,000		400,000
Senior Term Loans, (floating rate interest LIBOR plus 1.625%)	—		600,000
	632,900		1,154,000
Less amounts due within one year	—		60,000
Less unamortized debt discount	442		459
Total Energen	$	632,458	$	1,093,541

The aggregate maturities of Energen’s long-term debt outstanding at September 30, 2014 are as follows:

(in thousands)
Remaining 2014	2015	2016	2017	2018	2019 and thereafter
—	—	—	$19,000	—	$613,900

In December 2013, Energen issued $600 million in Senior Term Loans (Senior Term Loans) with a floating interest rate due March 31, 2014 through December 17, 2017. In conjunction with the sale of Alagasco, the Senior Term Loans were repaid in September 2014.

The debt agreements of Energen contain financial and nonfinancial covenants including routine matters such as timely payment of principal and interest, maintenance of corporate existence and restrictions on liens. Although none of the agreements have events of default based on credit ratings, the interest rates applicable to the syndicated credit facility discussed below may adjust based on credit rating changes during certain periods.

Under Energen’s Indenture dated September 1, 1996 with The Bank of New York as Trustee, a cross default provision provides that any debt default of more than $10 million by Energen or Energen Resources will constitute an event of default by Energen. The Indenture does not include a restriction on the payment of dividends.

Credit Facility: On September 2, 2014, Energen entered into a $1.5 billionfive-year syndicated secured credit facility with domestic and foreign lenders. The credit facility has an initial borrowing base of $2.1 billion. This credit facility refinances and replaces the $1.25 billionfive-year syndicated unsecured credit facility entered into on October 30, 2012. Energen’s obligations under the $1.5 billion syndicated credit facility are unconditionally guaranteed by Energen Resources. The current credit facility qualifies for classification as long-term debt on the consolidated balance sheets. The financial covenants of the credit facility require Energen to maintain a ratio of total debt to consolidated income before interest expense, income taxes, depreciation, depletion, amortization, exploration expense and other non-cash income and expenses (EBITDAX) less than or equal to 4.0 to 1.0, to maintain a ratio of consolidated current assets (adjusted to include amounts available for borrowings and exclude non-cash derivative instruments) to consolidated current liabilities (adjusted to exclude maturities under the credit facility and non-cash derivative instruments) greater than or equal to 1.0 to 1.0 and, during certain periods, to maintain a ratio of the net present value of proved reserves of our oil and natural gas properties to consolidated total debt greater than or equal to 1.50 to 1.0. We are also bound by covenants which limit our ability to incur additional indebtedness, make certain distributions or alter our corporate structure. Energen may not pay dividends during an event of default, if the payment would result in an event of default or if availability is less than 10 percent of the loan limit under the credit facility. Our credit facility also limits our ability to enter into commodity hedges based on projected production volumes.

Under the credit facility, a cross default provision provides that any debt default of more than $75 million by Energen or Energen Resources will constitute an event of default by Energen.

Upon an uncured event of default under the credit facility, all amounts owing under the credit facility, if any, depending on the nature of the event of default will automatically, or may upon notice by the administrative agent or the requisite lenders thereunder, become immediately due and payable and the lenders may terminate their commitments under the defaulted facility. Energen was in compliance with the terms of its credit facility as of September 30, 2014.

The following is a summary of information relating to Energen’s credit facilities:

(in thousands)	September 30, 2014			December 31, 2013
Notes payable to banks	$	78,900		$	489,000
Available for borrowings	1,421,100			761,000
Total	$	1,500,000		$	1,250,000
Maximum amount outstanding at any month-end	$	750,000		$	901,000
Average daily amount outstanding	$	559,878		$	804,895
Weighted average interest rates based on:
Average daily amount outstanding	1.43		%	1.38		%
Amount outstanding at period-end	1.66		%	1.32		%

Energen’s interest expense was $11.5 million and $27.4 million for the three months and nine months ended September 30, 2014, respectively. Interest expense for Energen was $10.1 million and $30.2 million for the three months and nine months ended September 30, 2013, respectively. Energen had no capitalized interest for the three months ended September 30, 2014. For the nine months ended September 30, 2014, Energen’s total interest expense included capitalized interest of $37,000. Energen had no capitalized interest expense for the three months ended September 30, 2013. Energen’s total interest expense for the nine months ended September 30, 2013 included capitalized interest expense of $0.2 million. At September 30, 2014, Energen paid commitment fees on the unused portion of the available credit facilities at a current annual rate of 30 basis points. See Note 1, Organization and Basis of Presentation, for further information regarding interest on debt required to be extinguished, associated with the sale of Alagasco, which was classified to discontinued operations.

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Organization and Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2014

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Derivative Instruments, Gain (Loss)

We further reclassified all commodity hedges from oil and natural gas operating revenues to gain (loss) on derivative instruments, net, as follows:

	Three months ended					Nine months ended
	September 30,					September 30,
(in thousands)	2014		2013			2014			2013
Open non-cash mark-to-market gains (losses) on derivative instruments	$	147,287	$	(63,560	)	$	53,985		$	(48,459	)
Closed gains (losses) on derivative instruments	448		(24,632		)	(44,487		)	(3,445		)
Gain (loss) on derivative instruments, net	$	147,735	$	(88,192	)	$	9,498		$	(51,904	)

Schedule of Discontinued Operations

The table below provides a detail of these items included in income (loss) from discontinued operations at September 30, 2014:

	Three months ended September 30,						Nine months ended September 30,
(in thousands)	2014			2013			2014			2013
Alagasco net income (loss)	$	(1,767	)	$	(8,961	)	$	40,646		$	37,557
Depreciation, depletion and amortization	(103		)	(150		)	(408		)	(443		)
General and administrative	1,710			1,158			3,337			4,784
Interest expense	(4,329		)	(3,676		)	(17,306		)	(9,786		)
Other income	—			(409		)	(347		)	(882		)
Income tax expense	1,029			1,145			5,567			2,392
Alagasco income (loss) from discontinued operations	(3,460		)	(10,893		)	31,489			33,622
Energen income (loss) from discontinued operations	(25		)	1,866			(1,054		)	6,269
Income (loss) from discontinued operations	$	(3,485	)	$	(9,027	)	$	30,435		$	39,891

The following table details held for sale properties by major classes of assets and liabilities:

(in thousands)	December 31, 2013
	Alabama Gas Corporation			Black Warrior Basin			North Louisiana/East Texas			Total
Cash	$	3,032		$	—		$	—		$	3,032
Accounts receivable*	103,748			2,829			1,272			107,849
Inventories	41,200			—			68			41,268
Oil and gas properties	—			—			348,379			348,379
Less accumulated depreciation, depletion and amortization	—						(301,609		)	(301,609		)
Utility plant	1,491,433			—			—			1,491,433
Less accumulated depreciation	(605,924		)	—			—			(605,924		)
Other property, net	41			—			165			206
Other current assets*	29,458			—			—			29,458
Other long-term assets	128,780			—			—			128,780
Total assets held for sale	1,191,768			2,829			48,275			1,242,872
Accounts payable	(48,653		)	(1,732		)	(11		)	(50,396		)
Royalty payable	—			(550		)	(869		)	(1,419		)
Accrued taxes	(28,027		)	—			—			(28,027		)
Notes payable to banks	(50,000		)	—			—			(50,000		)
Other current liabilities*	(105,013		)	(379		)	(21		)	(105,413		)
Other long-term liabilities	(331,409		)	—			(14,983		)	(346,392		)
Long-term debt	(249,923		)	—			—			(249,923		)
Total liabilities held for sale	(813,025		)	(2,661		)	(15,884		)	(831,570		)
Total net assets held for sale	$	378,743		$	168		$	32,391		$	411,302

*At December 31, 2013, Alagasco’s accounts receivable included a consolidating adjustment of $4.7 million to adjust for affiliated companies receivables. Certain other current assets and other current liabilities at Alagasco of $1.6 million and $0.5 million, respectively, were reclassified to continuing operations at Energen.

	Three months ended						Nine months ended
	September 30,						September 30,
(in thousands, except per share data)	2014			2013			2014		2013
Natural gas distribution revenues	$	39,874		$	48,368		$	397,648	$	390,567
Oil and natural gas revenues	6			18,258			5,217		55,483
Total revenues	$	39,880		$	66,626		$	402,865	$	446,050
Pretax income (loss) from discontinued operations	$	(5,938	)	$	(14,677	)	$	48,581	$	64,098
Income tax expense (benefit)	(2,453		)	(5,650		)	18,146		24,207
Income (Loss) From Discontinued Operations	$	(3,485	)	$	(9,027	)	$	30,435	$	39,891
Gain (loss) on disposal of discontinued operations	$	726,410		$	(24,612	)	$	724,743	$	(24,612	)
Income tax expense (benefit)	286,305			(8,934		)	285,688		(8,934		)
Gain (Loss) on Disposal of Discontinued Operations	$	440,105		$	(15,678	)	$	439,055	$	(15,678	)
Total Income (Loss) From Discontinued Operations	$	436,620		$	(24,705	)	$	469,490	$	24,213
Diluted Earnings Per Average Common Share
Income (loss) from discontinued operations	$	(0.05	)	$	(0.12	)	$	0.42	$	0.55
Gain (loss) on disposal of discontinued operations	5.99			(0.22		)	5.99		(0.21		)
Total Income (Loss) From Discontinued Operations	$	5.94		$	(0.34	)	$	6.41	$	0.34
Basic Earnings Per Average Common Share
Income (loss) from discontinued operations	$	(0.05	)	$	(0.12	)	$	0.42	$	0.55
Gain (loss) on disposal of discontinued operations	6.03			(0.22		)	6.03		(0.21		)
Total Income (Loss) From Discontinued Operations	$	5.98		$	(0.34	)	$	6.45	$	0.34

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Discontinued Operations

9 Months Ended

Sep. 30, 2014

Discontinued Operations and Disposal Groups [Abstract]

Discontinued Operations

DISCONTINUED OPERATIONS

On September 2, 2014, Energen completed the transaction to sell Alagasco to Laclede for $1.6 billion, less the assumption of $267 million in debt. The net pre-tax proceeds to Energen totaled approximately $1.32 billion, subject to closing adjustments. This sale has an effective date of August 31, 2014. Energen used cash proceeds from the sale to reduce long-term and short-term indebtedness. During the second quarter of 2014, Energen classified Alagasco as held for sale with prior period comparable and reflected the associated operating results in discontinued operations. Energen’s results of operations for the three months and nine months ended September 30, 2014 and 2013 and our financial position as of September 30, 2014 and December 31, 2013 presented in our unaudited consolidated financial statements and these notes reflect Alagasco as discontinued operations.

In March 2014, Energen completed the sale of its North Louisiana/East Texas natural gas and oil properties for $30.3 million (subject to closing adjustments). The sale had an effective date of December 1, 2013, and the proceeds from the sale were used to repay short-term obligations. During the third quarter of 2013, Energen classified these natural gas and oil properties as held for sale and reflected the associated operating results in discontinued operations. Energen recognized a non-cash impairment writedown on these properties in the first quarter of 2014 of $1.7 million pre-tax to adjust the carrying amount of these properties to their fair value based on an estimate of the selling price of the properties. This non-cash impairment writedown is reflected in loss on disposal of discontinued operations in the nine months ended September 30, 2014. Energen also recognized non-cash impairment writedowns on these properties in the third and fourth quarters of 2013 of $24.6 million pre-tax and $5.2 million pre-tax, respectively. Significant assumptions in valuing the proved reserves included the reserve quantities, anticipated operating costs, anticipated production taxes, future expected natural gas prices and basis differentials, anticipated production declines, and a discount rate of 10 percent commensurate with the risk of the underlying cash flow estimates. The impairment writedowns are classified as Level 3 fair value. At December 31, 2013, proved reserves associated with Energen’s North Louisiana/East Texas properties totaled 23 Bcf of natural gas and 91 MBbl of oil.

In October 2013, Energen completed the sale of its Black Warrior Basin coalbed methane properties in Alabama for $160 million (subject to closing adjustments). Energen recorded a pre-tax gain on the sale of approximately $35 million in the fourth quarter of 2013 which was reflected in gain on disposal of discontinued operations in the year ended December 31, 2013. The sale had an effective date of July 1, 2013, and the proceeds from the sale were used to repay short-term obligations. The property was classified as held for sale and reflected in discontinued operations during the third quarter of 2013. At December 31, 2012, proved reserves associated with Energen’s Black Warrior Basin properties totaled 97 Bcf of natural gas.

The following table details held for sale properties by major classes of assets and liabilities:

(in thousands)	December 31, 2013
	Alabama Gas Corporation			Black Warrior Basin			North Louisiana/East Texas			Total
Cash	$	3,032		$	—		$	—		$	3,032
Accounts receivable*	103,748			2,829			1,272			107,849
Inventories	41,200			—			68			41,268
Oil and gas properties	—			—			348,379			348,379
Less accumulated depreciation, depletion and amortization	—						(301,609		)	(301,609		)
Utility plant	1,491,433			—			—			1,491,433
Less accumulated depreciation	(605,924		)	—			—			(605,924		)
Other property, net	41			—			165			206
Other current assets*	29,458			—			—			29,458
Other long-term assets	128,780			—			—			128,780
Total assets held for sale	1,191,768			2,829			48,275			1,242,872
Accounts payable	(48,653		)	(1,732		)	(11		)	(50,396		)
Royalty payable	—			(550		)	(869		)	(1,419		)
Accrued taxes	(28,027		)	—			—			(28,027		)
Notes payable to banks	(50,000		)	—			—			(50,000		)
Other current liabilities*	(105,013		)	(379		)	(21		)	(105,413		)
Other long-term liabilities	(331,409		)	—			(14,983		)	(346,392		)
Long-term debt	(249,923		)	—			—			(249,923		)
Total liabilities held for sale	(813,025		)	(2,661		)	(15,884		)	(831,570		)
Total net assets held for sale	$	378,743		$	168		$	32,391		$	411,302

*At December 31, 2013, Alagasco’s accounts receivable included a consolidating adjustment of $4.7 million to adjust for affiliated companies receivables. Certain other current assets and other current liabilities at Alagasco of $1.6 million and $0.5 million, respectively, were reclassified to continuing operations at Energen.

We recognized interest on debt required to be extinguished in connection with the sale of Alagasco as discontinued operations. On September 2, 2014, Energen entered into a $1.5 billionfive-year syndicated secured credit facility with domestic and foreign lenders. This credit facility refinances and replaces the $1.25 billionfive-year syndicated unsecured credit facilities entered into on October 30, 2012. The interest associated with the October 2012 five-year syndicated unsecured credit facilities was classified as discontinued operations. See Note 1, Organization and Basis of Presentation, for further information regarding adjustments associated with the sale of Alagasco.

Gains and losses on the sale of certain oil and natural gas properties as well as any impairments of properties held for sale are reported as discontinued operations, with income or loss from operations of the associated assets reported as income or loss from discontinued operations. The results of operations for certain held for sale assets were reclassified and reported as discontinued operations for all prior periods presented. Energen may, in the ordinary course of business, be involved in the sale of developed or undeveloped properties. All assets held for sale are reported at the lower of the carrying amount or fair value.

	Three months ended						Nine months ended
	September 30,						September 30,
(in thousands, except per share data)	2014			2013			2014		2013
Natural gas distribution revenues	$	39,874		$	48,368		$	397,648	$	390,567
Oil and natural gas revenues	6			18,258			5,217		55,483
Total revenues	$	39,880		$	66,626		$	402,865	$	446,050
Pretax income (loss) from discontinued operations	$	(5,938	)	$	(14,677	)	$	48,581	$	64,098
Income tax expense (benefit)	(2,453		)	(5,650		)	18,146		24,207
Income (Loss) From Discontinued Operations	$	(3,485	)	$	(9,027	)	$	30,435	$	39,891
Gain (loss) on disposal of discontinued operations	$	726,410		$	(24,612	)	$	724,743	$	(24,612	)
Income tax expense (benefit)	286,305			(8,934		)	285,688		(8,934		)
Gain (Loss) on Disposal of Discontinued Operations	$	440,105		$	(15,678	)	$	439,055	$	(15,678	)
Total Income (Loss) From Discontinued Operations	$	436,620		$	(24,705	)	$	469,490	$	24,213
Diluted Earnings Per Average Common Share
Income (loss) from discontinued operations	$	(0.05	)	$	(0.12	)	$	0.42	$	0.55
Gain (loss) on disposal of discontinued operations	5.99			(0.22		)	5.99		(0.21		)
Total Income (Loss) From Discontinued Operations	$	5.94		$	(0.34	)	$	6.41	$	0.34
Basic Earnings Per Average Common Share
Income (loss) from discontinued operations	$	(0.05	)	$	(0.12	)	$	0.42	$	0.55
Gain (loss) on disposal of discontinued operations	6.03			(0.22		)	6.03		(0.21		)
Total Income (Loss) From Discontinued Operations	$	5.98		$	(0.34	)	$	6.45	$	0.34

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2014

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

COMMITMENTS AND CONTINGENCIES    

Commitments and Agreements: Under various agreements for third-party gathering, treatment, transportation or other services, Energen is committed to deliver minimum production volumes or to pay certain costs in the event the minimum quantities are not delivered. These delivery commitments are approximately 6 million barrels of oil equivalent (MMBOE) through September 2017.

Legal Matters: Energen and its affiliates are, from time to time, parties to various pending or threatened legal proceedings and we have accrued a provision for our estimated liability. Certain of these lawsuits include claims for punitive damages in addition to other specified relief. We recognize a liability for contingencies when information available indicates both a loss is probable and the amount of the loss can be reasonably estimated. Based upon information presently available, and in light of available legal and other defenses, contingent liabilities arising from threatened and pending litigation are not considered material in relation to the respective financial positions of Energen and its affiliates. It should be noted, however, that there is uncertainty in the valuation of pending claims and prediction of litigation results.

Energen Resources previously disclosed an adverse judgment relating to the ownership of the Company operated Cadenhead 25-1 Well (the Cadenhead Well) in Ward County, Texas. Upon a Motion to Reconsider, the adverse judgment was vacated by the District Court in Ward County, Texas and a Summary Judgment Order dated July 30, 2013 was entered confirming Energen Resources’ superior title to the Cadenhead Well and its associated oil and gas leases. The Summary Judgment Order has been affirmed by the Court of Appeals for the Eighth District of Texas.

Environmental Matters: Various environmental laws and regulations apply to the operations of Energen and Energen Resources. Historically, the cost of environmental compliance has not materially affected our financial position, results of operations or cash flows. New regulations, enforcement policies, claims for damages or other events could result in significant unanticipated costs.

Under oversight of the Site Remediation Section of the Railroad Commission of Texas, Energen Resources is currently in the process of cleanup and remediation of oil and gas wastes in nine reserve pits in Mitchell County, Texas. We estimate that the cleanup, remediation and related costs will approximate $4.1 million of which $3.4 million has been incurred.

During January 2014, Energen Resources responded to a General Notice and Information Request from the Environmental Protection Agency regarding the Reef Environmental Site in Sylacauga, Talladega County, Alabama. The letter identifies Energen Resources as a potentially responsible party under The Comprehensive Environmental Response, Compensation, and Liability Act for the cleanup of the Site. In 2008, Energen hired a third party to transport approximately 3,000 gallons of non-hazardous wastewater to Reef Environmental for wastewater treatment. Reef Environmental ceased operating its wastewater treatment system in 2010. Due to its one time use of Reef Environmental for a small volume of non-hazardous wastewater, Energen Resources has not accrued a liability for cleanup of the Site.

New Mexico Audits: In 2011, Energen Resources received an Order to Perform Restructured Accounting and Pay Additional Royalties (the Order), following an audit performed by the Taxation and Revenue Department (the Department) of the State of New Mexico on behalf of the Office of Natural Resources Revenue (ONRR), of federal oil and gas leases in New Mexico. The audit covered periods from January 2004 through December 2008 and included a review of the computation and payment of royalties due on minerals removed from specified U.S. federal leases. The Order addressed ONRR’s efforts to change accounting and reporting practices, and to unbundle fees charged by third parties that gather, compress and transport natural gas production. ONRR now maintains that all or some of such fees are not deductible.

Energen Resources appealed the Orderin 2011 and in July 2012, on a motion from ONRR, the Orderwas remanded. In August 2014, ONRR issued its Revised Order that is now under appeal. In the Revised Order, ONRR has ordered that Energen pay additional royalties on production from certain federal leases in the amount of $129,700. Energen estimates that application of the Revised Order to all of the Company’s federal leases would result in ONRR claims up to approximately $23 million, plus interest and penalties from 2004 forward. ONRR began implementing its unbundling initiative in 2010, but seeks to implement its revisions retroactively, despite the fact that they conflict with previous audits, allowances and industry practice. Energen continues to vigorously contest the Revised Order and the findings. Management is unable, at this time, to determine a range of reasonably possible losses, and no amount has been accrued as of September 30, 2014.

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Discontinued Operations Balance Sheet and Income Statement (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Assets of Disposal Group, Including Discontinued Operation [Abstract]
Cash					$ 3,032,000
Accounts receivable					107,849,000
Inventories					41,268,000
Oil and gas properties					348,379,000
Less accumulated depreciation, depletion and amortization					(301,609,000)
Utility plant					1,491,433,000
Less accumulated depreciation					(605,924,000)
Other property, net					206,000
Other current assets					29,458,000
Other long-term assets					128,780,000
Total assets held for sale					1,242,872,000
Total assets held for sale
Accounts payable					(50,396,000)
Royalty payable					(1,419,000)
Accrued taxes					(28,027,000)
Notes payable to banks					(50,000,000)
Other current liabilities					(105,413,000)
Other long-term liabilities					(346,392,000)
Long-term debt					(249,923,000)
Total liabilities held for sale					(831,570,000)
Total net assets held for sale					411,302,000
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Natural gas distribution revenues	39,874,000	48,368,000	397,648,000	390,567,000
Oil and natural gas revenues	6,000	18,258,000	5,217,000	55,483,000
Total revenues	39,880,000	66,626,000	402,865,000	446,050,000
Pretax income (loss) from discontinued operations	(5,938,000)	(14,677,000)	48,581,000	64,098,000
Income tax expense (benefit)	(2,453,000)	(5,650,000)	18,146,000	24,207,000
Income (Loss) From Discontinued Operations	(3,485,000)	(9,027,000)	30,435,000	39,891,000
Gain (loss) on disposal of discontinued operations	726,410,000	(24,612,000)	724,743,000	(24,612,000)
Income tax expense (benefit)	286,305,000	(8,934,000)	285,688,000	(8,934,000)
Gain (Loss) on Disposal of Discontinued Operations	440,105,000	(15,678,000)	439,055,000	(15,678,000)
Income (Loss) From Discontinued Operations	436,620,000	(24,705,000)	469,490,000	24,213,000
Diluted Earnings Per Average Common Share
Income (Loss) from Discontinued Operations (in dollars per share)	$ (0.05)	$ (0.12)	$ 0.42	$ 0.55
Loss on Disposal of Discontinued Operations (in dollars per share)	$ 5.99	$ (0.22)	$ 5.99	$ (0.21)
Total Income (Loss) From Discontinued Operations (in dollars per share)	$ 5.94	$ (0.34)	$ 6.41	$ 0.34
Basic Earnings Per Average Common Share
Income (Loss) from Discontinued Operations (in dollars per share)	$ (0.05)	$ (0.12)	$ 0.42	$ 0.55
Loss on Disposal of Discontinued Operations (in dollars per share)	$ 6.03	$ (0.22)	$ 6.03	$ (0.21)
Total Income (Loss) From Discontinued Operations (in dollars per share)	$ 5.98	$ (0.34)	$ 6.45	$ 0.34
Adjustment for affiliated companies receivables					4,700,000
Reclassification from accrued taxes to other current assets					1,600,000
Reclassification from accrued taxes to other current liabilities					500,000
Alabama Gas Corporation
Assets of Disposal Group, Including Discontinued Operation [Abstract]
Cash					3,032,000
Accounts receivable					103,748,000
Inventories					41,200,000
Oil and gas properties					0
Less accumulated depreciation, depletion and amortization					0
Utility plant					1,491,433,000
Less accumulated depreciation					(605,924,000)
Other property, net					41,000
Other current assets					29,458,000
Other long-term assets					128,780,000
Total assets held for sale					1,191,768,000
Total assets held for sale
Accounts payable					(48,653,000)
Royalty payable					0
Accrued taxes					(28,027,000)
Notes payable to banks					(50,000,000)
Other current liabilities					(105,013,000)
Other long-term liabilities					(331,409,000)
Long-term debt					(249,923,000)
Total liabilities held for sale					(813,025,000)
Total net assets held for sale					378,743,000
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Income (Loss) From Discontinued Operations	(3,460,000)	(10,893,000)	31,489,000	33,622,000
Black Warrior Basin
Assets of Disposal Group, Including Discontinued Operation [Abstract]
Cash					0
Accounts receivable					2,829,000
Inventories					0
Oil and gas properties					0
Less accumulated depreciation, depletion and amortization
Utility plant					0
Less accumulated depreciation					0
Other property, net					0
Other current assets					0
Other long-term assets					0
Total assets held for sale					2,829,000
Total assets held for sale
Accounts payable					(1,732,000)
Royalty payable					(550,000)
Accrued taxes					0
Notes payable to banks					0
Other current liabilities					(379,000)
Other long-term liabilities					0
Long-term debt					0
Total liabilities held for sale					(2,661,000)
Total net assets held for sale					168,000
North Louisiana/East Texas
Assets of Disposal Group, Including Discontinued Operation [Abstract]
Cash					0
Accounts receivable					1,272,000
Inventories					68,000
Oil and gas properties					348,379,000
Less accumulated depreciation, depletion and amortization					(301,609,000)
Utility plant					0
Less accumulated depreciation					0
Other property, net					165,000
Other current assets					0
Other long-term assets					0
Total assets held for sale					48,275,000
Total assets held for sale
Accounts payable					(11,000)
Royalty payable					(869,000)
Accrued taxes					0
Notes payable to banks					0
Other current liabilities					(21,000)
Other long-term liabilities					(14,983,000)
Long-term debt					0
Total liabilities held for sale					(15,884,000)
Total net assets held for sale					$ 32,391,000

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Stock Compensation

9 Months Ended

Sep. 30, 2014

Share-based Compensation [Abstract]

Stock Compensation

STOCK COMPENSATION

Stock Incentive Plan

Stock Options: The Stock Incentive Plan provides for the grant of incentive stock options and non-qualified stock options to officers and key employees. Options granted under the Stock Incentive Plan provide for the purchase of Energen common stock at not less than the fair market value on the date the option was granted. The sale or transfer of the shares is limited during certain periods. All outstanding options vest within three years from date of grant and expire 10 years from the grant date. Energen granted 107,868 non-qualified option shares during the first quarter of 2014 with a grant-date fair value of $27.57. During the second quarter of 2014, Energen granted 2,439 non-qualified option shares with a grant-date fair value of $32.22.

Restricted Stock: Additionally, the Stock Incentive Plan provides for the grant of restricted stock units. In January 2014, Energen awarded 41,664 restricted stock units with a grant-date fair value of $70.68. Energen granted 928 restricted stock units during the second quarter of 2014 with a grant-date fair value of $79.15. These awards have a three year vesting period. Energen also granted 6,312 restricted stock units during the second quarter of 2014 with a grant-date fair value of $78.99 and a two year graded vesting period. These awards were valued based on the quoted market price of Energen’s common stock at the date of grant.

Performance Share Awards: The Stock Incentive Plan also provides for the grant of performance share awards, with each unit equal to the market value of one share of common stock, to eligible employees based on predetermined Company performance criteria at the end of an award period. The Stock Incentive Plan provides that payment of earned performance share awards be made in the form of Energen common stock. Performance share awards are valued using the Monte Carlo model which uses historical volatility and other variables to estimate the probability of satisfying the market condition of the award. Energen granted 287 performance share awards during the first quarter of 2014 with a two year vesting period and a grant-date fair value of $118.99. Energen also granted 63,842 performance share awards during the first quarter of 2014 with a three year vesting period and a grant-date fair value of $93.13. During the second quarter of 2014, Energen granted 650 performance share awards with a two year vesting period and a grant-date fair value of $137.11. Energen also granted 1,467 performance share awards during the second quarter of 2014 with a three year vesting period and a grant-date fair value of $109.02.

Stock Appreciation Rights Plan

The Stock Appreciation Rights Plan provides for the payment of cash incentives measured by the long-term appreciation of Energen common stock. These awards are liability awards which settle in cash and are remeasured each reporting period until settlement and have a three year vesting period. Energen granted 62,749 awards during the first quarter of 2014. These awards had a fair value of $28.71 as of September 30, 2014.

Petrotech Incentive Plan

The Petrotech Incentive Plan provides for the grant of stock equivalent units. These awards are liability awards which settle in cash and are remeasured each reporting period until settlement. During the first quarter of 2014, Energen awarded 28,840 Petrotech units with a fair value of $72.06 as of September 30, 2014, none of which included a market condition. Also awarded were 36,920 Petrotech units which included a market condition and had a fair value of $94.38 as of September 30, 2014. These awards have a three year vesting period. During the third quarter of 2014, Energen Resources awarded 9,728 Petrotech units with a three-year vesting period and a fair value of $72.06 as of September 30, 2014, and 596 Petrotech units with a twenty-month vesting period and a fair value of $72.14 as of September 30, 2014, none of which included a market condition.

Stock Repurchase Program

During the three months and nine months ended September 30, 2014, Energen had non-cash purchases of approximately $36,000 and $0.4 million, respectively, of Energen common stock in conjunction with tax withholdings on our non-qualified deferred compensation plan and other stock compensation. Energen utilized internally generated cash flows in payment of the related tax withholdings.

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Employee Benefit Plans

9 Months Ended

Sep. 30, 2014

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Employee Benefit Plans

EMPLOYEE BENEFIT PLANS

In October 2014, Energen’s Board of Directors elected to freeze and terminate its qualified defined benefit pension plan. A plan amendment adopted in October 2014 closes the plan to new entrants, effective November 1, 2014, and freezes benefit accruals after December 31, 2014. Energen intends to terminate the plan on January 31, 2015. We anticipate distributing benefits under the plan in late 2015 or early 2016 pending receipt of a determination letter from the Internal Revenue Service and completion of certain administrative actions.

The Company’s non-qualified supplemental retirement plans will also be amended to terminate effective December 31, 2014. Distributions under the plans are subject to certain payment restrictions under the Internal Revenue Code and Treasury regulations and payments to plan participants will be made in each of the first quarters of 2015 and 2016. In connection with the termination of these plans, the Company has also reclassified approximately $17.1 million as of September 30, 2014 of its investment in a Rabbi Trust from other long term assets to prepayments and other assets in the accompanying balance sheets to reflect its intent to utilize these assets to fund the estimated payments in the first quarter of 2015.

In October 2014, Energen’s Board of Directors amended and restated the Employee Saving Plan to make certain benefit design changes effective January 1, 2015. The benefit design changes are expected to include an increase in the percentage of Company match and other contributions.

Effective April 30, 2014, Energen Corporation separated one of its defined benefit non-contributory pension plans into an Energen and an Alagasco plan reflecting the separation of assets and obligations in accordance with ERISA provisions. Energen remeasured our plans using current assumptions.

The components of net periodic benefit cost for Energen’s defined benefit non-contributory pension plan and certain nonqualified supplemental pension plans were as follows:

	Three months ended September 30,						Nine months ended September 30,
(in thousands)	2014			2013			2014			2013
Components of net periodic benefit cost:
Service cost	$	1,902		$	1,326		$	5,157		$	3,980
Interest cost	1,157			1,093			3,974			3,269
Expected long-term return on assets	(1,157		)	(1,321		)	(4,067		)	(3,966		)
Actuarial loss	1,296			1,760			4,115			5,417
Prior service cost amortization	63			62			177			185
Settlement charge	370			18			4,043			161
Net periodic expense	$	3,631		$	2,938		$	13,399		$	9,046

Energen is required to make approximately $7.7 million in contributions for 2014 to the qualified pension plans. This estimate includes required contributions for the Alagasco pension plans through August 31, 2014. In January 2014, we made a $3.0 million contribution and have utilized funding credits, as established under Internal Revenue Code Section 430(f), to meet the remaining required funding. We also made an additional discretionary contribution of $10 million to the Energen qualified pension plan in October 2014. We do not anticipate that the funded status of the qualified pension plans will fall below statutory thresholds requiring accelerated funding or constraints on benefit levels or plan administration. We may also make additional discretionary contributions to the qualified pension plan depending on the amount and timing of employee retirements and market conditions. For the three months and nine months ended September 30, 2014, Energen made benefit payments aggregating $74,000 and $1.0 million, respectively, to retirees from the non-qualified supplemental retirement plans and expects to make additional benefit payments of approximately $5.2 million through the remainder of 2014. In the third quarter of 2014, Energen incurred a settlement charge of $26,000 for the payment of lump sums from the non-qualified supplemental retirement plans. Also in the third quarter of 2014, Energen incurred settlement charges of $0.3 million for the payment of lump sums from the qualified defined benefit pension plan. In the second quarter of 2014, Energen incurred settlement charges of $0.4 million for the payment of lump sums from the qualified defined benefit pension plans. In the first quarter of 2014, Energen incurred settlement charges of $6.9 million for the payment of lump sums from the qualified defined benefit pension plans of which $3.7 million is included in discontinued operations. Also in the first quarter of 2014, Energen incurred a settlement charge of $0.4 million for the payment of lump sums from the non-qualified supplemental retirement plans. In the third quarter of 2013, Energen incurred a settlement charge of $18,000 for the payment of lump sums from the non-qualified supplemental retirement plans. In the first quarter of 2013, Energen incurred a settlement charge of $0.1 million for the payment of lump sums from the non-qualified supplemental retirement plans.

Also effective April 30, 2014, Energen Corporation separated its postretirement health care and life insurance benefit plans into separate plans established for Energen and Alagasco employees in accordance with ERISA provisions. Energen remeasured our plan using current assumptions.

The components of net periodic postretirement benefit expense for Energen’s postretirement benefit plan were as follows:

	Three months ended September 30,						Nine months ended September 30,
(in thousands)	2014			2013			2014			2013
Components of net periodic benefit cost:
Service cost	$	87		$	111		$	206		$	334
Interest cost	137			175			587			526
Expected long-term return on assets	(246		)	(212		)	(1,016		)	(638		)
Actuarial gain	(151		)	—			(572		)	—
Transition amortization	9			63			39			189
Net periodic (income) expense	$	(164	)	$	137		$	(756	)	$	411

There are no required contributions to the postretirement benefit plan during 2014.

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Exploratory Costs

9 Months Ended

Sep. 30, 2014

Extractive Industries [Abstract]

Exploratory Costs

EXPLORATORY COSTS

Energen capitalizes exploratory drilling costs until a determination is made that the well or project has either found proved reserves or is impaired. After an exploratory well has been drilled and found oil and natural gas reserves, a determination may be pending as to whether the oil and natural gas quantities can be classified as proved. In those circumstances, Energen continues to capitalize the drilling costs pending the determination of proved status if (i) the well has found a sufficient quantity of reserves to justify its completion as a producing well and (ii) Energen is making sufficient progress assessing the reserves and the economic and operating viability of the project. Capitalized exploratory drilling costs are presented in unproved properties in the balance sheets. If the exploratory well is determined to be impaired, the impaired costs are charged to exploration expense. Other exploration costs, including geological and geophysical costs, are expensed as incurred.

The following table sets forth capitalized exploratory well costs and includes additions pending determination of proved reserves, reclassifications to proved reserves and costs charged to expense:

	Three months ended September 30,						Nine months ended September 30,
(in thousands)	2014			2013			2014			2013
Capitalized exploratory well costs at beginning of period	$	166,458		$	72,172		$	57,600		$	79,791
Additions pending determination of proved reserves	258,724			99,428			623,913			319,008
Reclassifications due to determination of proved reserves	(258,123		)	(112,821		)	(513,263		)	(340,020		)
Exploratory well costs charged to expense	(1,217		)	—			(2,408		)	—
Capitalized exploratory well costs at end of period	$	165,842		$	58,779		$	165,842		$	58,779

The following table sets forth capitalized exploratory wells costs and includes amounts capitalized for a period greater than one year:

(in thousands)	September 30, 2014		December 31, 2013
Exploratory wells in progress	$	29,059	$	14,794
Capitalized exploratory well costs capitalized for a period of one year or less	136,783		42,481
Capitalized exploratory well costs for a period greater than one year	—		1,206
Total capitalized exploratory well costs	$	165,842	$	58,481

At September 30, 2014, Energen had 56 gross exploratory wells either drilling or waiting on results from completion and testing. These wells are located primarily in the Permian Basin.

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Organization and Basis of Presentation - Derivative Gains and Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivative instruments, net	$ 147,735	$ (88,192)	$ 9,498	$ (51,904)
Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Open non-cash mark-to-market gains (losses) on derivative instruments	147,287	(63,560)	53,985	(48,459)
Closed gains (losses) on derivative instruments	448	(24,632)	(44,487)	(3,445)
Gain (loss) on derivative instruments, net	$ 147,735	$ (88,192)	$ 9,498	$ (51,904)

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Stock Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended	3 Months Ended	1 Months Ended	3 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended		9 Months Ended	3 Months Ended		9 Months Ended	0 Months Ended	3 Months Ended		9 Months Ended	0 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Jun. 30, 2014 Stock options Stock Compensation Plan	Mar. 31, 2014 Stock options Stock Compensation Plan	Sep. 30, 2014 Stock options Stock Compensation Plan	Jun. 30, 2014 Restricted Stock Units (RSUs) Stock Compensation Plan 2 year vesting period	Jan. 31, 2013 Restricted Stock Units (RSUs) Stock Compensation Plan Vesting Period, Three [Member]	Jun. 30, 2014 Restricted Stock Units (RSUs) Stock Compensation Plan Vesting Period, Three [Member]	Sep. 30, 2014 Restricted Stock Units (RSUs) Stock Compensation Plan Vesting Period, Three [Member]	Sep. 30, 2014 Restricted Stock Units (RSUs) Petrotech Incentive Plan	Jun. 30, 2014 Performance share awards Stock Compensation Plan 2 year vesting period	Mar. 31, 2014 Performance share awards Stock Compensation Plan 2 year vesting period	Sep. 30, 2014 Performance share awards Stock Compensation Plan 2 year vesting period	Jun. 30, 2014 Performance share awards Stock Compensation Plan Vesting Period, Three [Member]	Mar. 31, 2014 Performance share awards Stock Compensation Plan Vesting Period, Three [Member]	Sep. 30, 2014 Performance share awards Stock Compensation Plan Vesting Period, Three [Member]	Sep. 30, 2014 Performance share awards Petrotech Incentive Plan	Mar. 31, 2014 Performance share awards Petrotech Incentive Plan	Mar. 31, 2014 Performance share awards Petrotech Incentive Plan Vesting Period, Three [Member]	Sep. 30, 2014 Performance share awards Petrotech Incentive Plan Vesting Period, Three [Member]	Sep. 30, 2014 Performance share awards Petrotech Incentive Plan 20 months vesting period	Sep. 30, 2014 Performance share awards Petrotech Incentive Plan 20 months vesting period	Sep. 30, 2014 Stock Appreciation Rights (SARs)	Mar. 31, 2014 Stock Appreciation Rights (SARs)	Sep. 30, 2014 Stock Appreciation Rights (SARs)	Sep. 30, 2014 Deferred Compensation	Sep. 30, 2014 Deferred Compensation
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period			3 years	2 years			3 years				2 years			3 years				3 years		20 months			3 years
Expiration period			10 years
Grants in period, options	2,439	107,868		6,312
Grants in period, options, fair value	$ 32.22	$ 27.57
Grants in period (in shares)					41,664	928		36,920	650	287		1,467	63,842			28,840	9,728		596			62,749
Grant date fair value				$ 78.99		$ 79.15
Grants in period, fair value (in dollars per share)					$ 70.68			$ 94.38	$ 137.11	$ 118.99		$ 109.02	$ 93.13		$ 72.06				$ 72.14		$ 28.71
Noncash payments for repurchase of common stock																								$ 36	$ 400

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Recently Issued Accounting Standards

9 Months Ended

Sep. 30, 2014

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

Recently Issued Accounting Standards

RECENTLY ISSUED ACCOUNTING STANDARDS

In April 2014, the Financial Accounting Standards Board issued Accounting Standards Update (ASU) No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. This update defines a discontinued operation as a disposal of a component or a group of components that is disposed of or is classified as held for sale and represents a strategic shift that has (or will have) a major effect on an entity’s operations and financial results. The amendment is effective for all annual periods beginning on or after December 15, 2014, and interim periods within those annual periods. Energen is currently evaluating the impact of the adoption of this ASU on its classification of future dispositions as discontinued operations.

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Long-Term Debt and Notes Payable (Tables)

9 Months Ended

Sep. 30, 2014

Debt Disclosure [Abstract]

Long-term debt

Long-term debt consisted of the following:

(in thousands)	September 30, 2014		December 31, 2013
Credit facility	$	78,900	$	—
7.40% Medium-term Notes, Series A, due July 24, 2017	2,000		2,000
7.36% Medium-term Notes, Series A, due July 24, 2017	15,000		15,000
7.23% Medium-term Notes, Series A, due July 28, 2017	2,000		2,000
7.32% Medium-term Notes, Series A, due July 28, 2022	20,000		20,000
7.60% Medium-term Notes, Series A, due July 26, 2027	5,000		5,000
7.35% Medium-term Notes, Series A, due July 28, 2027	10,000		10,000
7.125% Medium-term Notes, Series B, due February 15, 2028	100,000		100,000
4.625% Notes, due September 1, 2021	400,000		400,000
Senior Term Loans, (floating rate interest LIBOR plus 1.625%)	—		600,000
	632,900		1,154,000
Less amounts due within one year	—		60,000
Less unamortized debt discount	442		459
Total Energen	$	632,458	$	1,093,541

Maturities of Long-term Debt

The aggregate maturities of Energen’s long-term debt outstanding at September 30, 2014 are as follows:

(in thousands)
Remaining 2014	2015	2016	2017	2018	2019 and thereafter
—	—	—	$19,000	—	$613,900

Summary of Credit Facilities

The following is a summary of information relating to Energen’s credit facilities:

(in thousands)	September 30, 2014			December 31, 2013
Notes payable to banks	$	78,900		$	489,000
Available for borrowings	1,421,100			761,000
Total	$	1,500,000		$	1,250,000
Maximum amount outstanding at any month-end	$	750,000		$	901,000
Average daily amount outstanding	$	559,878		$	804,895
Weighted average interest rates based on:
Average daily amount outstanding	1.43		%	1.38		%
Amount outstanding at period-end	1.66		%	1.32		%

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Reconciliation of Earnings Per Share (EPS) - Earnings Per Share Reconciliation (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share Reconciliation
Net Income, Basic EPS	$ 457,251	$ (19,298)	$ 502,614	$ 120,461
Basic Shares Outstanding (in shares)	73,093	72,346	72,861	72,220
Earnings Per Share, Basic (in dollars per share)	$ 6.26	$ (0.27)	$ 6.90	$ 1.67
Effect of dilutive securities
Net Income, Diluted EPS	$ 457,251	$ (19,298)	$ 502,614	$ 120,461
Diluted Shares Outstanding (in shares)	73,507	72,346	73,238	72,272
Earnings Per Share, Diluted (dollars per share)	$ 6.22	$ (0.27)	$ 6.86	$ 1.67
Stock options
Effect of dilutive securities
Incremental common shares attributable to share-based payment arrangements	231	0	219	41
Non-vested restricted stock
Effect of dilutive securities
Incremental common shares attributable to share-based payment arrangements	68	0	67	10
Performance share awards
Effect of dilutive securities
Incremental common shares attributable to share-based payment arrangements	0	0	91	1

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Fair Value Measurements - Recurring Basis (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Noncurrent derivative instruments	$ 5,758	$ 5,439
Total assets	35,953	22,902
Total liabilities	(1,448)	(30,302)
Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative instruments	30,195	17,463
Noncurrent derivative instruments	5,758	5,439
Total assets	35,953	22,902
Derivative instruments	(808)	(30,302)
Noncurrent derivative instruments	(640)
Total liabilities	(1,448)	(30,302)
Net derivative asset	34,505	(7,400)
Recurring | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative instruments	16,355	(1,658)
Noncurrent derivative instruments	4,763	4,383
Total assets	21,118	2,725
Derivative instruments	(1,499)	(28,414)
Noncurrent derivative instruments	0
Total liabilities	(1,499)	(28,414)
Net derivative asset	19,619	(25,689)
Recurring | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative instruments	13,840	19,121
Noncurrent derivative instruments	995	1,056
Total assets	14,835	20,177
Derivative instruments	691	(1,888)
Noncurrent derivative instruments	(640)
Total liabilities	51	(1,888)
Net derivative asset	$ 14,886	$ 18,289

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Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net Income (Loss)	$ 457,251	$ (19,298)	$ 502,614	$ 120,461
Other comprehensive income (loss):
Total cash flow hedges	(3,525)	(5,220)	(8,560)	(28,831)
Pension and postretirement plans:
Amortization of net benefit obligation at transition, net of tax of ($1), $26, $6 and $77, respectively	(1)	48	11	143
Amortization of prior service cost, net of tax of $26, $28, $78 and $82, respectively	48	51	144	153
Amortization of net loss, including settlement charges, net of tax of $500, $729, $4,071 and $2,383, respectively	930	1,354	7,561	4,425
Current period change in fair value of pension and postretirement plans, net of tax of $190, $2,238, ($962) and $2,238, respectively	352	4,157	(1,784)	4,157
Total pension and postretirement plans	1,329	5,610	5,932	8,878
Comprehensive Income (Loss)	455,055	(18,908)	499,986	100,508
Commodity contracts
Other comprehensive income (loss):
Current period change in fair value of derivative commodity instruments, net of tax of $18, $42, $25, and ($6,669), respectively	29	69	40	(10,882)
Reclassification adjustment for derivative commodity instruments, net of tax of ($2,277), ($3,205), ($5,997) and ($11,486), respectively	(3,715)	(5,229)	(9,784)	(18,740)
Current period change in fair value of interest rate swap, net of tax of $0, ($188), ($160) and ($23), respectively	29	69	40	(10,882)
Reclassification adjustment for interest rate swap, net of tax of $86, $156, $798 and $449, respectively	(3,715)	(5,229)	(9,784)	(18,740)
Interest rate swap
Other comprehensive income (loss):
Current period change in fair value of derivative commodity instruments, net of tax of $18, $42, $25, and ($6,669), respectively	0	(350)	(298)	(42)
Reclassification adjustment for derivative commodity instruments, net of tax of ($2,277), ($3,205), ($5,997) and ($11,486), respectively	161	290	1,482	833
Current period change in fair value of interest rate swap, net of tax of $0, ($188), ($160) and ($23), respectively	0	(350)	(298)	(42)
Reclassification adjustment for interest rate swap, net of tax of $86, $156, $798 and $449, respectively	$ 161	$ 290	$ 1,482	$ 833

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Fair Value Measurements

9 Months Ended

Sep. 30, 2014

Fair Value Disclosures [Abstract]

Fair Value Measurements

FAIR VALUE MEASUREMENTS

Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (exit price). In determining fair value, we use various valuation approaches and classify all assets and liabilities based on the lowest level of input that is significant to the fair value measurement. Observable inputs represent market data obtained from independent sources, whereas unobservable inputs reflect our own considerations about the assumptions other market participants would use in pricing the asset or liability based on the best information available in the circumstances. Assessing the significance of a particular input may require judgment considering factors specific to the asset or liability, and may affect the valuation of the asset or liability and its placement within the fair value hierarchy. The hierarchy is broken down into three levels based on the observability of inputs as follows:

Level 1 - Unadjusted quoted prices in active markets for identical assets or liabilities;

Level 2 - Pricing inputs other than quoted prices in active markets included within Level 1, which are either directly or indirectly observable through correlation with market data as of the reporting date;

Level 3 - Pricing that requires inputs that are both significant and unobservable to the calculation of the fair value measure. The fair value measure represents estimates of the assumptions that market participants would use in pricing the asset or liability. Unobservable inputs are developed based on the best available information and subject to cost-benefit constraints.

No transfers between fair value hierarchy levels occurred during the three months or nine months ended September 30, 2014 or 2013.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Energen classifies the fair value of multiple derivative instruments executed under master netting arrangements as net derivative assets and liabilities. The following fair value hierarchy tables present information about Energen’s assets and liabilities measured at fair value on a recurring basis:

	September 30, 2014
(in thousands)	Level 2			Level 3			Total
Assets:
Derivative instruments	$	16,355		$	13,840		$	30,195
Noncurrent derivative instruments	4,763			995			5,758
Total assets	21,118			14,835			35,953
Liabilities:
Derivative instruments	(1,499		)	691			(808		)
Noncurrent derivative instruments	—			(640		)	(640		)
Total liabilities	(1,499		)	51			(1,448		)
Net derivative asset	$	19,619		$	14,886		$	34,505

	December 31, 2013
(in thousands)	Level 2			Level 3			Total
Assets:
Derivative instruments	$	(1,658	)	$	19,121		$	17,463
Noncurrent derivative instruments	4,383			1,056			5,439
Total assets	2,725			20,177			22,902
Liabilities:
Derivative instruments	(28,414		)	(1,888		)	(30,302		)
Total liabilities	(28,414		)	(1,888		)	(30,302		)
Net derivative asset (liability)	$	(25,689	)	$	18,289		$	(7,400	)

Derivative Instruments: The fair value of Energen’s derivative commodity instruments is determined using market transactions and other market evidence whenever possible, including market-based inputs to models and broker or dealer quotations. Our OTC derivative contracts trade in less liquid markets with limited pricing information as compared to markets with actively traded, unadjusted quoted prices; accordingly, the determination of fair value is inherently more difficult. OTC derivatives for which we are able to substantiate fair value through directly observable market prices are classified within Level 2 of the fair value hierarchy. These Level 2 fair values consist of swaps priced in reference to NYMEX oil and natural gas prices. OTC derivatives valued using unobservable market prices have been classified within Level 3 of the fair value hierarchy. These Level 3 fair values include basin specific, basis and natural gas liquids swaps. We consider the frequency of pricing and variability in pricing between sources in determining whether a market is considered active. While Energen does not have access to the specific assumptions used in its counterparties’ valuation models, Energen maintains communications with its counterparties and discusses pricing practices. Further, we corroborate the fair value of our transactions by comparison of market-based price sources.

Energen utilizes a discounted cash flow model in valuing its interest rate derivatives, which are comprised of interest rate swap agreements. The fair value attributable to Energen's interest rate derivative contracts is based on (i) the contracted notional amounts, (ii) active market-quoted London Interbank Offered Rate (LIBOR) yield curves and (iii) the applicable credit-adjusted risk-free rate yield curve.

At September 30, 2014, Energen had interest rate swap agreements with a notional of $150 million. The interest rate swaps exchange a variable interest rate for a fixed interest rate of 1.0425 percent. The fair value of our interest rate swaps was a $1.0 million and a $1.8 million liability at September 30, 2014 and December 31, 2013, respectively, and are classified as Level 2 fair value liabilities. The fair value of our interest rate swaps are recognized on a gross basis in accounts payable on the balance sheets.

Level 3 Fair Value Instruments: Energen prepared a sensitivity analysis to evaluate the hypothetical effect that changes in the prices used to estimate fair value would have on the fair value of its Level 3 instruments. We estimate that a 10 percent increase or decrease in commodity prices would result in an approximate $13 million change in the fair value of open Level 3 derivative contracts. The resulting impact upon the results of operations would be an approximate $13 million associated with open Level 3 derivative contracts. Liquidity requirements to meet the obligation would not be significantly impacted as gains and losses on the derivative contracts would be similarly offset by physical sales at the spot market price.

The tables below set forth a summary of changes in the fair value of Energen’s Level 3 derivative commodity instruments as follows:

	Three months ended			Three months ended
(in thousands)	September 30, 2014			September 30, 2013
Balance at beginning of period	$	5,207		$	51,131
Realized gains	10,769			10,852
Unrealized gains (losses) relating to instruments held at the reporting date*	9,348			(10,947		)
Settlements during period	(10,438		)	(9,830		)
Balance at end of period	$	14,886		$	41,206

	Nine months ended			Nine months ended
(in thousands)	September 30, 2014			September 30, 2013
Balance at beginning of period	$	18,289		$	89,019
Realized gains	8,581			41,952
Unrealized losses relating to instruments held at the reporting date*	(3,734		)	(48,835		)
Settlements during period	(8,250		)	(40,930		)
Balance at end of period	$	14,886		$	41,206

*Includes $12.2 million and $9.6 million in mark-to-market gains for the three months and nine months ended September 30, 2014, respectively. Includes $0.8 million and $4.7 million in mark-to-market gains for the three months and nine months ended September 30, 2013, respectively.

The table below sets forth quantitative information about Energen’s Level 3 fair value measurements of derivative commodity instruments as follows:

(in thousands, except price data)	Fair Value as of September 30, 2014			Valuation Technique*	Unobservable Input*	Range
Oil Basis - WTS/WTI
2014	$	1,115		Discounted Cash Flow	Forward Basis	($6.62) Bbl
2015	(181		)	Discounted Cash Flow	Forward Basis	($4.20 - $4.24) Bbl
Oil Basis - WTI/WTI
2014	$	2,736		Discounted Cash Flow	Forward Basis	($7.07 - $7.18) Bbl
2015	(1,979		)	Discounted Cash Flow	Forward Basis	($4.60 - $4.97) Bbl
Natural Gas Liquids
2014	$	1,600		Discounted Cash Flow	Forward Price	$0.67 - $0.90 Gal
Natural Gas Basis - San Juan
2014	$	4,946		Discounted Cash Flow	Forward Basis	($0.05 - $0.12) Mcf
2015	$	5,097		Discounted Cash Flow	Forward Basis	($0.09 - $0.10) Mcf
Natural Gas Basis - Permian
2014	$	(372	)	Discounted Cash Flow	Forward Basis	($0.09 - $0.10) Mcf
2015	$	1,924		Discounted Cash Flow	Forward Basis	($0.13) Mcf

*Discounted cash flow represents an income approach in calculating fair value including the referenced unobservable input and a discount reflecting credit quality of the counterparty.

Financial Instruments not Carried at Fair Value

The stated value of cash and cash equivalents, short-term investments, accounts receivable (net of allowance), and short-term debt approximates fair value due to the short maturity of the instruments. The fair value of Energen’s long-term debt, including the current portion, was approximately $637.3 million and $1,161.9 million and had a carrying value of $632.9 million and $1,154.0 million at September 30, 2014 and December 31, 2013, respectively. The fair values are based on market prices of similar debt issues having the same remaining maturities, redemption terms and credit rating. Short-term debt is classified as Level 1 fair value and long-term debt is classified as Level 2 fair value.

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Reclassifications of Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Reclassification out of Accumulated Other Comprehensive Income	Sep. 30, 2013 Reclassification out of Accumulated Other Comprehensive Income	Sep. 30, 2014 Reclassification out of Accumulated Other Comprehensive Income	Sep. 30, 2013 Reclassification out of Accumulated Other Comprehensive Income	Sep. 30, 2014 Cash Flow Hedges Reclassification out of Accumulated Other Comprehensive Income	Sep. 30, 2013 Cash Flow Hedges Reclassification out of Accumulated Other Comprehensive Income	Sep. 30, 2014 Cash Flow Hedges Reclassification out of Accumulated Other Comprehensive Income	Sep. 30, 2013 Cash Flow Hedges Reclassification out of Accumulated Other Comprehensive Income	Sep. 30, 2014 Pension and Postretirement Plans Reclassification out of Accumulated Other Comprehensive Income	Sep. 30, 2013 Pension and Postretirement Plans Reclassification out of Accumulated Other Comprehensive Income	Sep. 30, 2014 Pension and Postretirement Plans Reclassification out of Accumulated Other Comprehensive Income	Sep. 30, 2013 Pension and Postretirement Plans Reclassification out of Accumulated Other Comprehensive Income	Sep. 30, 2014 Commodity contracts Cash Flow Hedges Reclassification out of Accumulated Other Comprehensive Income	Sep. 30, 2013 Commodity contracts Cash Flow Hedges Reclassification out of Accumulated Other Comprehensive Income	Sep. 30, 2014 Commodity contracts Cash Flow Hedges Reclassification out of Accumulated Other Comprehensive Income	Sep. 30, 2013 Commodity contracts Cash Flow Hedges Reclassification out of Accumulated Other Comprehensive Income	Sep. 30, 2014 Interest rate swap Cash Flow Hedges Reclassification out of Accumulated Other Comprehensive Income	Sep. 30, 2013 Interest rate swap Cash Flow Hedges Reclassification out of Accumulated Other Comprehensive Income	Sep. 30, 2014 Interest rate swap Cash Flow Hedges Reclassification out of Accumulated Other Comprehensive Income	Sep. 30, 2013 Interest rate swap Cash Flow Hedges Reclassification out of Accumulated Other Comprehensive Income	Sep. 30, 2014 Supplemental Employee Retirement Plan	Mar. 31, 2014 Supplemental Employee Retirement Plan	Sep. 30, 2013 Supplemental Employee Retirement Plan	Mar. 31, 2013 Supplemental Employee Retirement Plan	Sep. 30, 2013 Alabama Gas Corporation Supplemental Employee Retirement Plan	Mar. 31, 2013 Alabama Gas Corporation Supplemental Employee Retirement Plan
Gains (losses) on cash flow hedges:
Reclassification Adjustment from AOCI on Derivatives																	$ 5,992,000	$ 8,433,000	$ 15,781,000	$ 30,226,000	$ (247,000)	$ (446,000)	$ (2,280,000)	$ (1,282,000)
Total									5,745,000	7,987,000	13,501,000	28,944,000	(1,502,000)	(2,234,000)	(11,871,000)	(7,263,000)
Income tax expense	(16,055,000)	(3,128,000)	(23,287,000)	(53,401,000)					(2,191,000)	(3,048,000)	(5,199,000)	(11,037,000)	525,000	783,000	4,155,000	2,542,000
Net of tax					2,577,000	3,488,000	586,000	13,186,000	3,554,000	4,939,000	8,302,000	17,907,000	(977,000)	(1,451,000)	(7,716,000)	(4,721,000)
Pension and postretirement plans:
Transition obligation													2,000	(74,000)	(17,000)	(220,000)
Prior service cost													(74,000)	(78,000)	(222,000)	(235,000)
Actuarial losses													(1,060,000)	(2,036,000)	(3,640,000)	(6,387,000)
Actuarial losses on settlement charges														0	(7,992,000)	0
Actuarial losses on settlement charges													(370,000)	(46,000)	0	(421,000)
Settlement charges																									0	400,000	64,000	500,000
Settlement charges expensed																												100,000
Settlements recognized as a pension asset																													46,000	400,000
Recognized in actuarial losses																											$ 18,000

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Reconciliation of Earnings Per Share (EPS) (Tables)

9 Months Ended

Sep. 30, 2014

Earnings Per Share [Abstract]

Schedule of Earnings Per Share Reconciliation

	Three months ended					Three months ended
(in thousands, except per share amounts)	September 30, 2014					September 30, 2013
	Net			Per Share		Net				Per Share
	Income		Shares	Amount		Income			Shares	Amount
Basic EPS	$	457,251	73,093	$	6.26	$	(19,298	)	72,346	$	(0.27	)
Effect of dilutive securities
Stock options			231						—
Non-vested restricted stock			68						—
Performance share awards			115						—
Diluted EPS	$	457,251	73,507	$	6.22	$	(19,298	)	72,346	$	(0.27	)

In periods of loss, shares that otherwise would have been included in diluted average common shares outstanding are excluded. The Company had 242,560 of excluded shares for the three months ended September 30, 2013.

	Nine months ended					Nine months ended
(in thousands, except per share amounts)	September 30, 2014					September 30, 2013
	Net			Per Share		Net			Per Share
	Income		Shares	Amount		Income		Shares	Amount
Basic EPS	$	502,614	72,861	$	6.90	$	120,461	72,220	$	1.67
Effect of dilutive securities
Stock options			219					41
Non-vested restricted stock			67					10
Performance share awards			91					1
Diluted EPS	$	502,614	73,238	$	6.86	$	120,461	72,272	$	1.67

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

Energen had the following shares that were excluded from the computation of diluted EPS, as inclusion would be anti-dilutive:

	Three months ended September 30,		Nine months ended September 30,
(in thousands)	2014	2013	2014	2013
Stock options	6	—	6	875
Performance share awards	2	—	4	79

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Derivative Commodity Instruments Derivatives commodity instruments - Cash flow hedging relationship in financial statements (Details) (Commodity contracts, USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net gain (loss) recognized in other comprehensive income on derivatives (effective portion), net of tax	$ 29	$ 69	$ 40	$ (10,882)
Gain (Loss) Recognized in other comprehensive income on derivatives	18	42	25	(6,669)
Gain (loss) on derivative instruments, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain reclassified from accumulated other comprehensive income into income (effective portion)	5,992	8,455	15,781	29,391
Gain (Loss) recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing)	$ 0	$ (22)	$ 0	$ 835

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Acquisition and Disposition of Properties

9 Months Ended

Sep. 30, 2014

Business Acquisitions and Dispositions [Abstract]

Acquisition and Disposition of Properties

ACQUISITION AND DISPOSITION OF PROPERTIES

During the third quarter of 2014, Energen recognized a non-cash impairment writedown on certain properties in the Permian Basin of $31.2 million pre-tax to adjust the carrying amount of these properties to their fair value based on expected future discounted cash flows in anticipation of being designated as held for sale. This non-cash impairment writedown is reflected in asset impairment on the consolidated income statement.

During the third quarter of 2014, a non-cash impairment writedown of $147.9 million pre-tax was recognized by Energen on certain gas properties in the San Juan Basin to adjust the carrying amount of these properties to their fair value based on expected future discounted cash flows in anticipation of being designated as held for sale. This non-cash impairment writedown is reflected in asset impairment on the consolidated income statement. At December 31, 2013, proved reserves associated with Energen’s San Juan Basin properties totaled 73,070 MBOE.

In October 2014, Energen purchased approximately 15,000 net acres of unproved leasehold in the Mancos formation oil play in the San Juan Basin for $22.8 million.