Consolidated Statement of Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenue:
Coal sales	$ 33,995	$ 29,620
Equity income - Savoy	1,084	1,818
Equity income - Sunrise Energy	122	56
Other	2,461	2,462
	37,662	33,956
Costs and expenses:
Operating costs and expenses	23,290	18,433
DD&A	4,560	3,806
Coal exploration costs	539	419
SG&A	1,976	1,855
Interest	376	271
	30,741	24,784
Income before income taxes	6,921	9,172
Less income taxes:
Current	801	1,884
Deferred	652	1,135
	1,453	3,019
Net income	5,468	6,153
Net income per share:
Basic (in Dollars per share)	$ 0.19	$ 0.22
Diluted (in Dollars per share)	$ 0.19	$ 0.21
Weighted average shares outstanding:
Basic (in Shares)	28,529	28,309
Diluted (in Shares)	28,751	28,681
Other comprehensive income:
Increase in value of marketable equity securities available for sale, net of tax	174	14
Comprehensive income	$ 5,642	$ 6,167