Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash Flows from Operating Activities:
Net income (loss)	$ (1,124,532)	$ 14,743
Adjustments to reconcile net income to net cash provided by operating activities -
Depreciation, depletion, and amortization	138,392	201,072
Write-down of oil and gas properties	1,084,595	0
Accretion of asset retirement obligation	4,156	4,246
Deferred income taxes	(80,133)	13,507
Stock-based compensation expenses	3,288	5,571
Other Noncash Income (Expense)	3,627	(390)
(Increase) Decrease in accounts receivable and other current assets	11,841	14,159
Increase (decrease) in accounts payable and accrued liabilities	(4,768)	7,299
Increase (decrease) in income taxes payable	(450)	543
Increase (decrease) in accrued interest	(7,606)	(8,575)
Net Cash Provided by Operating Activities	28,410	252,175
Cash Flows from Investing Activities:
Additions to property and equipment	(126,752)	(316,972)
Proceeds from the sale of property and equipment	977	145,535
Funds withdrawn from restricted cash account	0	6,501
Funds deposited into restricted cash account	0	18,345
Net Cash Used in Investing Activities	(125,775)	(183,281)
Cash Flows from Financing Activities:
Proceeds from bank borrowings	258,200	356,900
Payments of bank borrowings	(153,500)	(419,900)
Net proceeds from issuances of common stock	302	824
Purchase of treasury shares	(150)	(954)
Payments of debt issuance costs	(571)	0
Net Cash Used in Financing Activities	104,281	(63,130)
Net Increase (Decrease) in Cash and Cash Equivalents	6,916	5,764
Cash and Cash Equivalents at Beginning of Period	406	3,277
Cash and Cash Equivalents at End of Period	7,322	9,041
Supplemental Disclosures of Cash Flows Information:
Cash paid during period for interest, net of amounts capitalized	62,012	61,983
Cash paid during period for income taxes	$ 450	$ 150