Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 98,145	$ 43,902
Receivables:
Crude oil and natural gas sales	642,534	671,665
Affiliated parties	73	63
Joint interest and other, net	417,429	426,585
Derivative assets	8,683	2,603
Inventories	107,169	97,406
Prepaid expenses and other	17,022	9,501
Total current assets	1,291,055	1,251,725
Net property and equipment, based on successful efforts method of accounting	13,073,054	12,933,789
Other noncurrent assets	13,408	14,137
Total assets	14,377,517	14,199,651
Current liabilities:
Accounts payable trade	739,932	692,908
Revenues and royalties payable	393,372	374,831
Payables to affiliated parties	155	143
Accrued liabilities and other	255,412	260,074
Derivative liabilities	102	0
Current portion of long-term debt	2,304	2,286
Total current liabilities	1,391,277	1,330,242
Long-term debt, net of current portion	6,163,775	6,351,405
Other noncurrent liabilities:
Deferred income tax liabilities, net	1,331,094	1,259,558
Asset retirement obligations, net of current portion	114,840	111,794
Other noncurrent liabilities	15,310	15,449
Total other noncurrent liabilities	1,461,244	1,386,801
Commitments and contingencies (Note 8)
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; 376,057,204 shares issued and outstanding at March 31, 2018; 375,219,769 shares issued and outstanding at December 31, 2017	3,760	3,752
Additional paid-in capital	1,405,388	1,409,326
Accumulated other comprehensive income	309	307
Retained earnings	3,951,764	3,717,818
Total shareholders’ equity	5,361,221	5,131,203
Total liabilities and shareholders’ equity	$ 14,377,517	$ 14,199,651