CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net loss	$ (188,784)	$ (327,388)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, depletion and amortization	61,558	86,422
Write-down of oil and gas properties	129,204	491,412
Accretion expense	9,983	6,409
Deferred income tax provision (benefit)	2,877	(179,906)
Settlement of asset retirement obligations	(4,667)	(17,145)
Non-cash stock compensation expense	2,312	2,640
Non-cash derivative expense	192	1,511
Non-cash interest expense	4,635	4,318
Other non-cash expense	6,081	0
Change in current income taxes	(1,074)	7,188
Decrease in accounts receivable	5,845	8,206
(Increase) decrease in other current assets	(185)	1,883
Decrease in accounts payable	(2,138)	(8,657)
Increase in other current liabilities	3,898	6,889
Other	(298)	(260)
Net cash provided by operating activities	29,439	83,522
Cash flows from investing activities:
Investment in oil and gas properties	(129,859)	(169,895)
Investment in fixed and other assets	(496)	(662)
Change in restricted funds	1,045	177,642
Net cash (used in) provided by investing activities	(129,310)	7,085
Cash flows from financing activities:
Proceeds from bank borrowings	477,000	5,000
Repayments of bank borrowings	(20,000)	(5,000)
Repayments of building loan	(95)	0
Net payments for share-based compensation	(650)	(2,991)
Net cash provided by (used in) financing activities	456,255	(2,991)
Effect of exchange rate changes on cash	(9)	24
Net change in cash and cash equivalents	356,375	87,640
Cash and cash equivalents, beginning of period	10,759	74,488
Cash and cash equivalents, end of period	$ 367,134	$ 162,128