Consolidated balance sheets - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents		$ 22,395
Accounts receivable, net		63,952
Inventories, net		4,207
Prepaid expenses		2,161
Derivative instruments		8,130
Total current assets		100,845
Property and equipment, net		52,766
Oil and natural gas properties, using the full cost method:
Proved		707,938
Unevaluated (excluded from the amortization base)		599,885
Accumulated depreciation, depletion, amortization and impairment		(59,157)
Total oil and natural gas properties		1,248,666
Derivative instruments		5,990
Other assets		3,082
Total assets		1,411,349
Current liabilities:
Accounts payable and accrued liabilities		65,069
Accrued payroll and benefits payable		9,466
Accrued interest payable		404
Revenue distribution payable		15,574
Long-term debt and capital leases, classified as current		4,758
Derivative instruments		0
Total current liabilities		95,271
Long-term debt and capital leases, less current maturities		319,696
Derivative instruments		0
Deferred compensation		561
Asset retirement obligations		60,614
Liabilities subject to compromise		0
Commitments and contingencies (Note 11)
Stockholders’ equity (deficit):
Preferred stock		0
Additional paid in capital		952,172
Accumulated deficit		(17,433)
Total stockholders' equity (deficit)		935,207
Total liabilities and stockholders' equity (deficit)		1,411,349
Common Class A
Stockholders’ equity (deficit):
Common stock		389
Common Class B
Stockholders’ equity (deficit):
Common stock		$ 79
Predecessor
Current assets:
Cash and cash equivalents			$ 186,480
Accounts receivable, net			46,226
Inventories, net			7,351
Prepaid expenses			3,886
Derivative instruments			0
Total current assets			243,943
Property and equipment, net			41,347
Oil and natural gas properties, using the full cost method:
Proved			4,323,964
Unevaluated (excluded from the amortization base)			20,353
Accumulated depreciation, depletion, amortization and impairment			(3,789,133)
Total oil and natural gas properties			555,184
Derivative instruments			0
Other assets			5,513
Total assets			845,987
Current liabilities:
Accounts payable and accrued liabilities			42,442
Accrued payroll and benefits payable			3,459
Accrued interest payable			732
Revenue distribution payable			9,426
Long-term debt and capital leases, classified as current	[1]		469,112
Derivative instruments			7,525
Total current liabilities			532,696
Long-term debt and capital leases, less current maturities			0
Derivative instruments			5,844
Deferred compensation			0
Asset retirement obligations			65,456
Liabilities subject to compromise			1,284,144
Commitments and contingencies (Note 11)
Stockholders’ equity (deficit):
Preferred stock			0
Additional paid in capital			425,231
Accumulated deficit			(1,467,398)
Total stockholders' equity (deficit)			(1,042,153)
Total liabilities and stockholders' equity (deficit)			845,987
Predecessor | Common Class A
Stockholders’ equity (deficit):
Common stock			4
Predecessor | Common Class B
Stockholders’ equity (deficit):
Common stock			3
Predecessor | Common Class C
Stockholders’ equity (deficit):
Common stock			2
Predecessor | Common Class E
Stockholders’ equity (deficit):
Common stock			5
Predecessor | Common Class F
Stockholders’ equity (deficit):
Common stock			0
Predecessor | Common Class G
Stockholders’ equity (deficit):
Common stock			$ 0

[1] Senior Notes have not been included in this table as they were classified as “Liabilities subject to compromise.”