Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 12,896	$ 43,902
Receivables:
Crude oil and natural gas sales	794,447	671,665
Affiliated parties	126	63
Joint interest and other, net	442,779	426,585
Derivative assets	0	2,603
Inventories	104,230	97,406
Prepaid expenses and other	14,659	9,501
Total current assets	1,369,137	1,251,725
Net property and equipment, based on successful efforts method of accounting	13,644,538	12,933,789
Other noncurrent assets	17,385	14,137
Total assets	15,031,060	14,199,651
Current liabilities:
Accounts payable trade	771,425	692,908
Revenues and royalties payable	462,082	374,831
Payables to affiliated parties	316	143
Accrued liabilities and other	245,229	260,074
Derivative liabilities	9,056	0
Current portion of long-term debt	2,341	2,286
Total current liabilities	1,490,449	1,330,242
Long-term debt, net of current portion	5,955,326	6,351,405
Other noncurrent liabilities:
Deferred income tax liabilities, net	1,511,569	1,259,558
Asset retirement obligations, net of current portion	122,532	111,794
Derivative liability, noncurrent	354	0
Other noncurrent liabilities	12,020	15,449
Total other noncurrent liabilities	1,646,475	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; 375,995,294 shares issued and outstanding at September 30, 2018; 375,219,769 shares issued and outstanding at December 31, 2017	3,760	3,752
Additional paid-in capital	1,426,222	1,409,326
Accumulated other comprehensive income	430	307
Retained earnings	4,508,398	3,717,818
Total shareholders’ equity	5,938,810	5,131,203
Total liabilities and shareholders’ equity	$ 15,031,060	$ 14,199,651