Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net loss	$ (60,501)	$ (180,756)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Deferred tax expense	561	1,073
Depreciation, depletion and amortization	17,331	38,999
Ceiling test writedown	31,639	174,406
Accretion of asset retirement obligation	1,226	1,682
Share-based compensation expense	925	2,828
Amortization costs and other	810	1,162
Payments to settle asset retirement obligations	(2,515)	(1,186)
Gain on sale of oil and gas properties	0	(21,531)
Costs incurred to issue 2021 Notes	4,808	0
Changes in working capital accounts:
Revenue receivable	24	8,735
Joint interest billing receivable	30,814	(1,171)
Accounts payable and accrued liabilities	(31,260)	(36,051)
Advances from co-owners	(15,541)	17,846
Other	(4,387)	(410)
Net cash (used in) provided by operating activities	(26,066)	5,626
Cash flows provided by investing activities:
Investment in oil and gas properties	(18,166)	(62,451)
Investment in other property and equipment	(28)	(134)
Sale of oil and gas properties	24,909	257,698
Net cash provided by investing activities	6,715	195,113
Cash flows used in financing activities:
Net proceeds for share based compensation	52	432
Deferred financing costs	(100)	(829)
Payment of preferred stock dividend	(1,284)	(2,569)
Redemption of 2017 Notes	(53,626)	0
Costs incurred to issue 2021 Notes	(4,808)	0
Proceeds from bank borrowings	0	70,000
Repayment of bank borrowings	0	(145,000)
Net cash used in financing activities	(59,766)	(77,966)
Net (decrease) increase in cash and cash equivalents	(79,117)	122,773
Cash and cash equivalents, beginning of period	148,013	18,243
Cash and cash equivalents, end of period	68,896	141,016
Cash paid during the period for:
Interest	16,783	18,626
Income taxes	$ 0	$ (26)