Consolidated Statement of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenue:
Coal sales		$ 95,323	$ 36,130	$ 192,396	$ 69,146
Other		120	197	872	480
Revenue		95,253	38,460	193,254	74,227
Costs and expenses:
Operating costs and expenses		68,280	26,096	134,432	49,101
DD&A		10,770	5,193	22,108	10,152
Coal exploration costs		492	526	1,200	1,191
SG&A		3,080	2,738	6,424	4,709
Interest		3,323	397	8,779	862
Costs and expenses		85,945	34,950	172,943	66,015
Income before income taxes		9,308	3,510	20,311	8,212
Less income taxes:
Current		(865)	3,169	551	4,401
Deferred		3,320	(2,727)	5,316	(2,783)
Income taxes		2,455	442	5,867	1,618
Net income (loss)	[1]	$ 6,853	$ 3,068	$ 14,444	$ 6,594
Net income per share: (Note 7)
Basic and diluted (in Dollars per share)		$ 0.23	$ 0.10	$ 0.48	$ 0.22
Weighted average shares outstanding:
Basic and diluted (in Shares)		29,024	28,770	28,993	28,763
Savoy [Member]
Revenue:
Equity income (loss)		$ (153)	$ 2,135	$ (17)	$ 4,514
Revenue				7,671	24,493
Costs and expenses:
Costs and expenses				7,712	14,480
Less income taxes:
Net income (loss)				(41)	10,013
Sunrise Energy [Member]
Revenue:
Equity income (loss)		$ (37)	$ (2)	3	87
Revenue				1,167	1,583
Costs and expenses:
Costs and expenses				1,161	1,409
Less income taxes:
Net income (loss)				$ 6	$ 174

[1] There is no material difference between net income and comprehensive income.