Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 170,379	$ 208,637
Accounts receivable	22,693	35,074
Prepaid expenses and other current assets	10,218	9,699
Total current assets	203,290	253,410
Oil and natural gas properties (full cost method)
Proved	4,739,021	4,730,537
Gas gathering and processing equipment	15,812	15,811
Office furniture and fixtures	16,002	15,838
Total property, plant and equipment	4,770,835	4,762,186
Accumulated depletion, depreciation and amortization	(4,359,776)	(4,253,806)
Total property, plant and equipment, net	411,059	508,380
Other assets:
Other long-term assets	35,887	35,931
Total other assets	35,887	35,931
Total assets	650,236	797,721
Current liabilities:
Accounts payable - trade	9,772	11,012
Royalties payable	11,236	15,039
Accrued exploration and development	1,875	6,897
Accrued operating expenses and other	65,162	69,245
Accrued interest payable	130	128
Other short-term liabilities	1,263	1,161
Total current liabilities	89,438	103,482
Asset retirement obligation	41,392	40,860
Other long-term liabilities	48,316	48,197
Liabilities subject to compromise	2,908,538	2,908,130
Total liabilities	$ 3,087,684	$ 3,100,669
Commitments and contingencies (Note 12)
Shareholders’ deficit
Preferred stock, $0.01 par value, 10,000,000 authorized shares, 2,508,945 shares issued and outstanding at March 31, 2016 and December 31, 2015	$ 25	$ 25
Common stock, $0.10 par value, 650,000,000 authorized shares; 202,758,722 and 202,041,900 shares issued and outstanding at March 31, 2016 and December 31, 2015, respectively	20,273	20,203
Additional paid in capital	1,566,801	1,566,289
Accumulated deficit	(4,023,443)	(3,888,361)
Accumulated other comprehensive loss	(1,104)	(1,104)
Total shareholders’ deficit	(2,437,448)	(2,302,948)
Total liabilities and shareholders’ deficit	$ 650,236	$ 797,721