Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 16,643	$ 11,463
Receivables:
Crude oil and natural gas sales	404,750	378,622
Affiliated parties	99	122
Joint interest and other, net	364,850	232,293
Derivative assets	4,061	93,922
Inventories	111,987	94,151
Prepaid expenses and other	10,843	11,766
Total current assets	913,233	822,339
Net property and equipment, based on successful efforts method of accounting	12,881,227	14,063,328
Noncurrent derivative assets	0	14,560
Other noncurrent assets	17,316	19,581
Total assets	13,811,776	14,919,808
Current liabilities:
Accounts payable trade	476,342	553,285
Revenues and royalties payable	217,425	187,000
Payables to affiliated parties	148	69
Accrued liabilities and other	176,770	176,947
Derivative liabilities	59,489	3,583
Current portion of long-term debt	2,219	2,144
Total current liabilities	932,393	923,028
Long-term debt, net of current portion	6,577,697	7,115,644
Other noncurrent liabilities:
Deferred income tax liabilities, net	1,890,305	2,090,228
Asset retirement obligations, net of current portion	94,436	101,251
Noncurrent derivative liabilities	0	3,706
Other noncurrent liabilities	14,949	17,051
Total other noncurrent liabilities	1,999,690	2,212,236
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; 374,492,357 shares issued and outstanding at December 31, 2016; 372,959,080 shares issued and outstanding at December 31, 2015	3,745	3,730
Additional paid-in capital	1,375,290	1,345,624
Accumulated other comprehensive loss	(260)	(3,354)
Retained earnings	2,923,221	3,322,900
Total shareholders’ equity	4,301,996	4,668,900
Total liabilities and shareholders’ equity	$ 13,811,776	$ 14,919,808