Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 208,637	$ 3,252
Accounts receivable	35,074	108,110
Prepaid expenses and other current assets	9,699	13,092
Derivative instruments		160,217
Total current assets	253,410	284,671
Oil and natural gas properties (full cost method)
Proved	4,730,537	4,214,260
Unproved		319,256
Gas gathering and processing equipment	15,811	14,315
Total property, plant and equipment	4,762,186	4,561,861
Office furniture and fixtures	15,838	14,030
Accumulated depletion, depreciation and amortization	(4,253,806)	(2,495,793)
Total property, plant and equipment, net	508,380	2,066,068
Other assets:
Deferred financing costs, net		34,862
Other long-term assets	35,931	6,665
Total other assets	35,931	41,527
Total assets	797,721	2,392,266
Current liabilities:
Accounts payable - trade	11,012	83,282
Royalties payable	15,039	41,368
Accrued exploration and development	6,897	112,580
Accrued operating expenses and other	69,245	71,244
Accrued interest payable	128	30,946
Derivative instruments		4,645
Current maturities of long-term debt, net of discount		1,988,883
Other short-term liabilities	1,161	14,304
Total current liabilities	103,482	2,347,252
Asset retirement obligation	40,860	39,382
Derivative instruments		2,269
Other long-term liabilities	48,197	67,155
Liabilities subject to compromise	2,908,130
Total liabilities	$ 3,100,669	$ 2,456,058
Commitments and contingencies (Note 14)
Shareholders’ deficit
Preferred stock, $0.01 par value, 10,000,000 authorized shares, 2,508,945 shares issued and outstanding at December 31, 2015 and December 31, 2014	$ 25	$ 25
Common stock, $0.10 par value, 650,000,000 authorized shares; 202,041,900 and 200,975,778 shares issued and outstanding at December 31, 2015 and December 31, 2014, respectively	20,203	20,096
Additional paid in capital	1,566,289	1,564,805
Accumulated deficit	(3,888,361)	(1,648,718)
Other comprehensive loss	(1,104)
Total shareholders’ deficit	(2,302,948)	(63,792)
Total liabilities and shareholders’ deficit	$ 797,721	$ 2,392,266