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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2016
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:
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﻿ |  |  |  |  |  |  |  |  |  |  |
﻿ | 2016 |  |  | 2015 |  |  |  | 2014 |
﻿Expected amount | $ | 2,966 |  |  | $ | 9,653 |  |  | $ | 3,745 |
﻿Change in Indiana rate |  |  |  |  |  | (85 | ) |  |  | (1,407 | )
﻿State income taxes, net of federal benefit |  | (387 | ) |  |  | 612 |  |  |  | 186 |
﻿Percentage depletion |  | (6,021 | ) |  |  | (2,606 | ) |  |  | (1,996 | )
﻿Stock-based compensation |  | (238 | ) |  |  |  |  |  |  | 343 |
﻿Captive insurance |  | (418 | ) |  |  | (419 | ) |  |  | (419 | )
﻿Other |  | 72 |  |  |  | 283 |  |  |  | 30 |
﻿ | $ | (4,026 | ) |  | $ | 7,438 |  |  | $ | 482 |
﻿
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:
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﻿ |  | 2016 |  |  |  | 2015 |
Long-term deferred tax assets: |  |  |  |  |  |  |
﻿Stock-based compensation | $ | 512 |  |  | $ | 458 |
﻿Investment in Savoy |  | 1,031 |  |  |  | 827 |
﻿Net operating loss |  | 14,908 |  |  |  | 7,583 |
﻿Alternative minimum tax credit |  | 4,221 |  |  |  | 4,388 |
﻿Other |  | 564 |  |  |  | 18 |
﻿Total long-term deferred tax assets |  | 21,236 |  |  |  | 13,274 |
Long-term deferred tax liabilities: |  |  |  |  |  |  |
﻿Coal properties |  | (50,439 | ) |  |  | (46,596 | )
﻿Oil and gas properties |  | (15,971 | ) |  |  | (15,711 | )
﻿Total long-term deferred tax liabilities |  | (66,410 | ) |  |  | (62,307 | )
﻿Net deferred tax liability | $ | (45,174 | ) |  | $ | (49,033 | )
﻿

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- Definition Expected Income Tax [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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