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Other Long-Term Assets (Tables) | 12 Months Ended
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Dec. 31, 2018
Other Long-Term Assets [Abstract] |
Schedule of Long-Term Assets |
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﻿ |  |  |  |  |
﻿ |  |  |  |  |
﻿ |  | 2018 |  |  | 2017
﻿ |  |  |  |  |
﻿Advanced coal royalties | $ | 10,186 |  | $ | 9,720
﻿Marketable equity securities available for sale, |  |  |  |  |
﻿at fair value (restricted)* |  | 1,909 |  |  | 2,148
﻿Other |  | 2,122 |  |  | 2,792
﻿Total other long-term assets | $ | 14,217 |  | $ | 14,660
﻿ |  |  |  |  |
﻿______________________ |  |  |  |  |
﻿*Held by Sunrise Indemnity, Inc., our wholly owned captive insurance company. |  |  |  |  |
﻿

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- Definition Tabular disclosure of noncurrent assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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