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Discontinued Operations (Tables) | 6 Months Ended
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Jun. 30, 2017
Discontinued Operations [Abstract] |
Results of Operations Associated with Discontinued Operations |
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﻿ | Three Months |  | Six Months
﻿ | Ended June 30, |  | Ended June 30,
﻿(Thousands of dollars) |  | 2017 |  | 2016 |  | 2017 |  | 2016
﻿Revenues | $ | 717 |  | 151 |  | 1,739 |  | 835
﻿Income (loss) before income taxes |  | (217) |  | 25 |  | 752 |  | 708
﻿Income tax benefit |  | – |  | – |  | – |  | –
﻿Income (loss) from discontinued operations | $ | (217) |  | 25 |  | 752 |  | 708
﻿
Major Categories of Assets and Liabilities Reflected as Held for Sale |
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﻿ |  |  |  |
﻿ | June 30, |  | December 31,
﻿(Thousands of dollars) | 2017 |  | 2016
﻿Current assets |  |  |  |
﻿Cash | $ | 13,050 |  | 4,126
﻿Accounts receivable |  | 9,195 |  | 22,944
﻿Total current assets held for sale | $ | 22,245 |  | 27,070
﻿Current liabilities |  |  |  |
﻿Accounts payable | $ | 508 |  | 270
﻿Refinery decommissioning cost |  | 2,444 |  | 2,506
﻿Total current liabilities associated with assets held for sale | $ | 2,952 |  | 2,776
﻿

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