Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash Flows from Operating Activities:
Net Income (Loss)	$ 86,759	$ (309,382)
Adjustments to reconcile net income to net cash provided by operation activities -
Write-down of oil and gas properties	0	355,948
Depreciation, depletion, and amortization	68,629	64,564
Accretion of asset retirement obligation	306	354
Deferred income taxes	6,212	21,390
Stock-based compensation expense	4,645	4,557
Gain (Loss) on Sale of Derivatives	123,018	(61,304)
Cash Received (Paid) On Settlements of Derivative Contracts	(70,582)	78,421
Asset Retirement Obligation, Cash Paid to Settle	(158)	(94)
Write off of Deferred Debt Issuance Cost	229	557
Other Noncash Income (Expense)	2,877	3,061
Change in assets and liabilities-
(Increase) decrease in accounts receivable and other assets	(23,513)	9,011
Increase (decrease) in accounts payable and accrued liabilities	17,507	(977)
Increase (decrease) in income taxes payable	(83)	480
Increase (decrease) in accrued interest	(286)	(414)
Net Cash Provided by Operating Activities	215,726	165,212
Cash Flows from Investing Activities:
Additions to property and equipment	(133,638)	(114,738)
Acquisition of properties	(51,734)	(4,544)
Proceeds from Sale of Property, Plant, and Equipment	0	(4,777)
Payments for (Proceeds from) Other Investing Activities	(1,084)	(826)
Net Cash Used in Investing Activities	(186,456)	(115,331)
Cash Flows from Financing Activities:
Payments of long-term debt	(50,000)	0
Proceeds from bank borrowings	335,000	107,000
Payments of bank borrowings	(338,000)	(156,000)
Proceeds from Issuance or Sale of Equity	26,956	0
Purchase of treasury shares	(612)	(90)
Payments of debt issuance costs	(3,611)	(31)
Net Cash Provided by (Used in) Financing Activities	(30,267)	(49,121)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(997)	760
Total Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,121	2,118
Supplemental Disclosures of Cash Flows Information:
Cash paid during period for interest, net of amounts capitalized	27,221	28,929
Increase (decrease) in accrued payables for capital	(4,033)	(19,365)
Other Significant Noncash Transaction, Value of Consideration Given	$ (83,522)	$ 0