Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 254,973	$ 3,252
Accounts receivable	46,173	108,110
Prepaid expenses and other current assets	14,173	13,092
Derivative instruments		160,217
Total current assets	315,319	284,671
Oil and natural gas properties (full cost method)
Proved	4,610,546	4,214,260
Unproved	109,070	319,256
Gas gathering and processing equipment	15,217	14,315
Office furniture and fixtures	15,765	14,030
Total property, plant and equipment	4,750,598	4,561,861
Accumulated depletion, depreciation and amortization	(3,953,455)	(2,495,793)
Total property, plant and equipment, net	797,143	2,066,068
Other assets:
Deferred financing costs, net		34,862
Deferred income taxes	1,173	117,662
Other long-term assets	10,051	6,665
Total other assets	11,224	159,189
Total assets	1,123,686	2,509,928
Current liabilities:
Accounts payable - trade	19,142	83,282
Royalties payable	20,985	41,368
Accrued exploration and development	24,870	112,580
Accrued operating expenses and other	63,692	71,244
Accrued interest payable	285	30,946
Derivative instruments		4,645
Deferred income taxes	1,173	117,662
Current maturities of long-term debt, net of discount		1,988,883
Other short-term liabilities	1,732	14,304
Total current liabilities	131,879	2,464,914
Asset retirement obligation	40,481	39,382
Derivative instruments		2,269
Other long-term liabilities	62,857	67,155
Liabilities subject to compromise	2,876,416
Total liabilities	$ 3,111,633	$ 2,573,720
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 September 30, 2015 and December 31, 2014	$ 25	$ 25
Common stock, $0.10 par value, 650,000,000 authorized shares, 200,548,103 and 200,975,778 shares issued and outstanding at September 30, 2015 and December 31, 2014, respectively	20,053	20,096
Additional paid in capital	1,566,034	1,564,805
Accumulated deficit	(3,574,059)	(1,648,718)
Total shareholders’ deficit	(1,987,947)	(63,792)
Total liabilities and shareholders’ deficit	$ 1,123,686	$ 2,509,928