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Discontinued Operations and Assets Held for Sale (Tables) | 3 Months Ended
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Mar. 31, 2018
Discontinued Operations and Assets Held for Sale [Abstract] |
Results of Operations Associated with Discontinued Operations |
﻿ |  |  |  |  |
﻿ | Three Months |
﻿ | Ended March 31, |
﻿(Thousands of dollars) |  | 2018 |  | 2017 |
﻿Revenues | $ | – |  | 129 |
﻿Income (loss) before income taxes |  | (437) |  | 969 |
﻿Income tax benefit |  | – |  | – |
﻿Income (loss) from discontinued operations | $ | (437) |  | 969 |
﻿
Major Categories of Assets and Liabilities Reflected as Held for Sale |
﻿ |  |  |  |
﻿ |  |  |  |
﻿ |  | March 31, |  | December 31,
﻿(Thousands of dollars) |  | 2018 |  | 2017
﻿Current assets |  |  |  |
﻿Cash | $ | 16,380 |  | 16,631
﻿Accounts receivable |  | 6,316 |  | 6,298
﻿Total current assets held for sale | $ | 22,696 |  | 22,929
﻿Current liabilities |  |  |  |
﻿Accounts payable | $ | 467 |  | 837
﻿Refinery decommissioning cost |  | 2,693 |  | 2,693
﻿Total current liabilities associated with assets held for sale | $ | 3,160 |  | 3,530
﻿

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- Definition Schedule Of Disposal Groups Including Discontinued Operations Income Statement Disclosures [Table Text Block] + References No definition available. + Details
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