Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Operating Activities
Net income	$ 7,738	$ 8,461
Adjustments to reconcile net income to net
Change in derivative fair value	7,998	(6,840)
Depreciation, depletion, and amortization	16,877	12,285
Asset Impairment Charges	0	1,977
Amortization of deferred financing fees	629	676
Accretion of future site restoration	290	335
Stock-based compensation	1,468	1,142
Changes in operating assets and liabilities:
Accounts receivable	4,766	(6,474)
Other	281	4,941
Accounts payable and accrued expenses	(10,594)	6,268
Net cash provided by operating activities	29,453	22,771
Investing Activities
Capital expenditures, including purchases and development of properties	(92,770)	(33,466)
Proceeds from sale of oil and gas properties	5,471	3,192
Net cash used in investing activities	(87,299)	(30,274)
Financing Activities
Proceeds from long-term borrowings	48,000	21,000
Payments on long-term borrowings	(44,901)	(13,101)
Proceeds from Issuance of Common Stock	53,958	0
Increase (Decrease) in Deferred Charges	(855)	(96)
Exercise of stock options	201	44
Other	(26)	(29)
Net cash provided by financing activities	56,377	7,818
Effect of exchange rate changes on cash	6	56
(Decrease) increase in cash	(1,463)	371
Cash and equivalents, at beginning of period	5,205	2,061
Cash and equivalents, at end of period	3,742	2,432
Supplemental disclosure of cash flow information:
Interest paid	$ 1,052	$ 2,256