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Discontinued Operations and Assets Held for Sale (Tables) | 9 Months Ended
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Sep. 30, 2017
Discontinued Operations and Assets Held for Sale [Abstract] |
Results of Operations Associated with Discontinued Operations |
﻿ |  |  |  |  |  |  |  |
﻿ | Three Months |  | Nine Months
﻿ | Ended September 30, |  | Ended September 30,
﻿(Thousands of dollars) |  | 2017 |  | 2016 |  | 2017 |  | 2016
﻿Revenues (costs) | $ | 598 |  | 5 |  | 853 |  | 1,454
﻿Income (loss) before income taxes |  | 425 |  | (1,593) |  | 1,177 |  | (885)
﻿Income tax benefit |  | – |  | – |  | – |  | –
﻿Income (loss) from discontinued operations | $ | 425 |  | (1,593) |  | 1,177 |  | (885)
﻿
Major Categories of Assets and Liabilities Reflected as Held for Sale |
﻿ |  |  |  |
﻿ |  |  |  |
﻿ |  | September 30, |  | December 31,
﻿(Thousands of dollars) |  | 2017 |  | 2016
﻿Current assets |  |  |  |
﻿Cash | $ | 17,030 |  | 4,126
﻿Accounts receivable |  | 6,218 |  | 22,944
﻿Total current assets held for sale | $ | 23,248 |  | 27,070
﻿Current liabilities |  |  |  |
﻿Accounts payable | $ | 605 |  | 270
﻿Refinery decommissioning cost |  | 2,665 |  | 2,506
﻿Total current liabilities associated with assets held for sale | $ | 3,270 |  | 2,776
﻿Non-current liabilities |  |  |  |
﻿Asset retirement obligation - Seal asset | $ | – |  | 85,900
﻿

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