Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flows from Operating Activities:
Net Income (Loss)	$ (1,653,971)	$ (283,427)	$ (2,442)
Adjustments to reconcile net income to net cash provided by operation activities -
Write-down of oil and gas properties	1,562,086	445,396	46,948
Depreciation, depletion, and amortization	177,512	267,590	252,769
Accretion of asset retirement obligation	5,572	5,712	6,181
Deferred income taxes	(80,133)	(150,357)	2,647
Stock-based compensation expense	4,435	7,309	10,099
Reorganization items (non-cash)	6,565	0	0
Other	(831)	(8,910)	(5,443)
Change in assets and liabilities-
(Increase) decrease in accounts receivable	26,747	21,411	(1,894)
Increase (decrease) in accounts payable and accrued liabilities	(15,003)	1,505	2,607
Increase (decrease) in income taxes payable	(435)	314	(224)
Increase (decrease) in accrued interest	9,730	(172)	199
Net Cash Provided by Operating Activities	42,274	306,371	311,447
Cash Flows from Investing Activities:
Additions to property and equipment	(139,688)	(386,336)	(540,368)
Proceeds from the sale of property and equipment	1,164	145,035	6,991
Funds withdrawn from restricted cash account	0	25,994	0
Funds deposited into restricted cash account	0	(25,994)	0
Net Cash Used in Investing Activities	(138,524)	(241,301)	(533,377)
Cash Flows from Financing Activities:
Proceeds from bank borrowings	281,100	487,400	622,500
Payments of bank borrowings	(153,500)	(555,100)	(396,900)
Net proceeds from issuances of common stock	302	824	950
Purchase of treasury shares	(154)	(1,065)	(1,513)
Payments of debt issuance costs	(2,444)	0	0
Net Cash Provided by (Used in) Financing Activities	125,304	(67,941)	225,037
Net Increase (decrease) in Cash and Cash Equivalents	29,054	(2,871)	3,107
Cash and Cash Equivalents at Beginning of Period	406	3,277	170
Cash and Cash Equivalents at End of Period	29,460	406	3,277
Supplemental Disclosures of Cash Flows Information:
Cash paid during period for interest, net of amounts capitalized	63,132	70,933	67,070
Cash paid during period for income taxes	$ 450	$ 150	$ 217