CONDENSED CONSOLIDATED BALANCE SHEET (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 8,773	$ 20,954
Accounts receivable, net	119,743	235,397
Income taxes receivable	16,218	3,612
Inventories	18,283	14,026
Derivative instruments	48,445	137,603
Other current assets	3,959	1,855
Total current assets	215,421	413,447
Properties and equipment, net (Successful efforts method)	5,141,404	4,925,711
Equity method investments	93,408	68,029
Other assets	34,439	30,529
TOTAL ASSETS	5,484,672	5,437,716
Current liabilities
Accounts payable	191,341	400,076
Current portion of long-term debt	20,000	0
Accrued liabilities	39,123	63,669
Income taxes payable	2,448	0
Deferred income taxes	12,673	35,273
Total current liabilities	265,585	499,018
Postretirement benefits	38,018	35,827
Long-term debt	2,017,000	1,752,000
Deferred income taxes	874,702	843,876
Asset retirement obligations	138,889	124,655
Other liabilities	28,741	39,607
Total liabilities	$ 3,362,935	$ 3,294,983
Commitments and contingencies
Stockholders' equity
Common stock: Authorized -- 960,000,000 shares of $0.10 par value in 2015 and 2014, respectively Issued-- 423,767,060 shares and 422,915,258 shares in 2015 and 2014, respectively	$ 42,377	$ 42,292
Additional paid-in capital	716,930	710,432
Retained earnings	1,671,416	1,698,995
Accumulated other comprehensive income (loss)	(2,151)	(2,151)
Less treasury stock, at cost: 9,892,680 shares in 2015 and 2014, respectively	(306,835)	(306,835)
Total stockholders' equity	2,121,737	2,142,733
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 5,484,672	$ 5,437,716