CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net loss	$ (474,180)	$ (772,259)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, depletion and amortization	166,707	226,309
Write-down of oil and gas properties	284,337	1,011,385
Accretion expense	30,147	19,315
Deferred income tax provision (benefit)	10,947	(280,760)
Settlement of asset retirement obligations	(15,106)	(59,826)
Non-cash stock compensation expense	6,407	9,163
Non-cash derivative expense	1,261	10,854
Non-cash interest expense	14,278	13,210
Other non-cash expense	6,081	0
Change in current income taxes	21,584	7,211
Decrease in accounts receivable	3,968	33,895
Increase in other current assets	(4,426)	(1,090)
Increase (decrease) in accounts payable	3,217	(11,592)
Decrease in other current liabilities	(14,222)	(6,753)
Other	(8,107)	(82)
Net cash provided by operating activities	32,893	198,980
Cash flows from investing activities:
Investment in oil and gas properties	(200,622)	(385,528)
Proceeds from sale of oil and gas properties, net of expenses	0	11,643
Investment in fixed and other assets	(1,231)	(1,455)
Change in restricted funds	1,046	179,475
Net cash used in investing activities	(200,807)	(195,865)
Cash flows from financing activities:
Proceeds from bank borrowings	477,000	5,000
Repayments of bank borrowings	(135,500)	(5,000)
Repayments of building loan	(285)	0
Deferred financing costs	(900)	0
Net payments for share-based compensation	(752)	(3,127)
Net cash provided by (used in) financing activities	339,563	(3,127)
Effect of exchange rate changes on cash	(9)	(2)
Net change in cash and cash equivalents	171,640	(14)
Cash and cash equivalents, beginning of period	10,759	74,488
Cash and cash equivalents, end of period	$ 182,399	$ 74,474