Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 43,902	$ 16,643
Receivables:
Crude oil and natural gas sales	671,665	404,750
Affiliated parties	63	99
Joint interest and other, net	426,585	364,850
Derivative assets	2,603	4,061
Inventories	97,406	111,987
Prepaid expenses and other	9,501	10,843
Total current assets	1,251,725	913,233
Net property and equipment, based on successful efforts method of accounting	12,933,789	12,881,227
Other noncurrent assets	14,137	17,316
Total assets	14,199,651	13,811,776
Current liabilities:
Accounts payable trade	692,908	476,342
Revenues and royalties payable	374,831	217,425
Payables to affiliated parties	143	148
Accrued liabilities and other	260,074	176,770
Derivative liabilities	0	59,489
Current portion of long-term debt	2,286	2,219
Total current liabilities	1,330,242	932,393
Long-term debt, net of current portion	6,351,405	6,577,697
Other noncurrent liabilities:
Deferred income tax liabilities, net	1,259,558	1,890,305
Asset retirement obligations, net of current portion	111,794	94,436
Noncurrent derivative liabilities	0	0
Other noncurrent liabilities	15,449	14,949
Total other noncurrent liabilities	1,386,801	1,999,690
Commitments and contingencies (Note 10)
Shareholders’ equity:
Preferred stock, $0.01 par value; 25,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.01 par value; 1,000,000,000 shares authorized; 375,219,769 shares issued and outstanding at December 31, 2017; 374,492,357 shares issued and outstanding at December 31, 2016	3,752	3,745
Additional paid-in capital	1,409,326	1,375,290
Accumulated other comprehensive loss	307	(260)
Retained earnings	3,717,818	2,923,221
Total shareholders’ equity	5,131,203	4,301,996
Total liabilities and shareholders’ equity	$ 14,199,651	$ 13,811,776