Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash Flows from Operating Activities:
Net Income	$ (769,944)	$ 12,269
Adjustments to reconcile net income to net cash provided by operation activities -
Depreciation, depletion, and amortization	102,786	135,741
Write-down of oil and gas properties	763,073	0
Accretion of asset retirement obligation	2,746	2,801
Deferred income taxes	(80,133)	11,199
Stock-based compensation expenses	2,153	3,683
Other Noncash Income (Expense)	3,606	(2,439)
(Increase) Decrease in accounts receivable	9,041	1,360
Increase (decrease) in accounts payable and accrued liabilities	(3,997)	5,895
Increase (decrease) in income taxes payable	0	(150)
Increase (decrease) in accrued interest	108	(56)
Net Cash Provided by Operating Activities	29,439	170,303
Cash Flows from Investing Activities:
Additions to property and equipment	(104,997)	(208,979)
Proceeds from the sale of property and equipment	946	35
Net Cash Used in Investing Activities	(104,051)	(208,944)
Cash Flows from Financing Activities:
Proceeds from bank borrowings	180,500	195,800
Payments of bank borrowings	(105,800)	(159,800)
Net proceeds from issuances of common stock	302	824
Purchase of treasury shares	(150)	(896)
Payments of debt issuance costs	(571)	0
Net Cash Used in Financing Activities	74,281	35,928
Net Increase (Decrease) in Cash and Cash Equivalents	(331)	(2,713)
Cash and Cash Equivalents at Beginning of Period	406	3,277
Cash and Cash Equivalents at End of Period	75	564
Supplemental Disclosures of Cash Flows Information:
Cash paid during period for interest, net of amounts capitalized	35,488	36,031
Cash paid during period for income taxes	$ 0	$ 150