Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Taxes [Abstract]

Expected Income Tax

Our income tax is different than the expected amount computed using the applicable federal and state statutory income tax rates.  The reasons for and effects of such differences for the years ended December 31 are below:

		2017		2016			2015
Expected amount	$	4,868	$	2,966		$	9,653
Adjustment to deferred taxes from the Tax Act rate reduction		(17,974)
Change in Indiana rate							(85	)
State income taxes, net of federal benefit		115		(387	)		612
Percentage depletion		(4,128)		(6,021	)		(2,606	)
Stock-based compensation		(204)		(238	)
Captive insurance		(379)		(418	)		(419	)
Adjustments to NOL carryforwards		(1,038)
Return to provision adjustments		(205)
Other		(249)		72			283
	$	(19,194)	$	(4,026	)	$	7,438

Schedule of Deferred Tax Assets and Liabilities

The deferred tax assets and liabilities resulting from temporary differences between book and tax basis are comprised of the following at December 31: 

		2017			2016
Long-term deferred tax assets:
Stock-based compensation	$	251		$	512
Investment in Savoy		781			1,031
Net operating loss		13,626			14,908
Alternative minimum tax credit		2,705			4,221
Other		943			564
Total long-term deferred tax assets		18,306			21,236
Long-term deferred tax liabilities:
Coal properties		(47,034	)		(50,439	)
Oil and gas properties		0			(15,971	)
Total long-term deferred tax liabilities		(47,034	)		(66,410	)
Net deferred tax liability	$	(28,728)		$	(45,174	)