Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Activities
Net income	$ 595	$ 817
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Equity in gain of joint venture	0	(783)
Change in derivative fair value	592	512
Monetization of derivative contracts	0	12,364
Depreciation, depletion, and amortization	6,509	4,838
Amortization of deferred financing fees	333	30
Accretion of future site restoration	172	116
Stock-based compensation	474	477
Changes in operating assets and liabilities:
Accounts receivable	(8,804)	(506)
Other	(69)	(101)
Accounts payable and accrued expenses	10,111	8,024
Net cash provided by operating activities	9,913	25,788
Investing Activities
Capital expenditures, including purchases and development of properties	(17,773)	(26,126)
Net cash used in investing activities	(17,773)	(26,126)
Financing Activities
Proceeds from long-term borrowings	12,000	4,500
Payments on long-term borrowings	(6,047)	(4,044)
Deferred financing fees	0	(72)
Exercise of stock options	0	59
Other	0	(105)
Net cash provided by financing activities	5,953	338
Effect of exchange rate changes on cash	0	0
Decrease in cash	(1,907)	0
Cash and equivalents, at beginning of period	2,061	0
Cash and equivalents, at end of period	154	0
Supplemental disclosure of cash flow information:
Interest paid	$ 1,016	$ 1,126