Consolidated Statement of Operations (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Revenue:
Coal sales	$ 137,998	$ 129,003
Gain on sale of unproved oil and gas properties	10,653
Equity income - Savoy	5,476	1,005
Equity income - Sunrise Energy	922
Other income (loss) (Note 8)	2,305	(772)
	157,354	129,236
Costs and expenses:
Operating costs and expenses	77,094	72,527
DD&A	14,096	11,818
Coal exploration costs	1,132	780
SG&A	7,004	5,556
Interest	1,288	1,926
	100,614	92,607
Income before income taxes	56,740	36,629
Less income taxes:
Current	7,266	885
Deferred	13,665	13,369
	20,931	14,254
Net income	$ 35,809	$ 22,375
Net income per share:
Basic (in Dollars per share)	$ 1.27	$ 0.81
Diluted (in Dollars per share)	$ 1.25	$ 0.78
Weighted average shares outstanding:
Basic (in Shares)	28,135	27,790
Diluted (in Shares)	28,694	28,571