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Discontinued operations (Tables) | 3 Months Ended
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Mar. 31, 2018
Discontinued Operations and Disposal Groups [Abstract] |
Disposal groups, including discontinued operations | The carrying amounts of the major classes of assets and liabilities classified as held for sale, related to the operations of Fidelity, on the Company's Consolidated Balance Sheets were as follows:
| March 31, 2018 |  | March 31, 2017 |  |  | December 31, 2017 |
| (In thousands)
Assets |  |  |  |
Current assets: |  |  |  |
Receivables, net | $ | 458 |  | $ | 266 |  |  | $ | 479 |
Total current assets held for sale | 458 |  | 266 |  |  | 479 |
Noncurrent assets: |  |  |  |
Net property, plant and equipment | 1,631 |  | 4,515 |  |  | 1,631 |
Deferred income taxes | 2,637 |  | 91,098 |  |  | 2,637 |
Other | 161 |  | 161 |  |  | 161 |
Total noncurrent assets held for sale | 4,429 |  | 95,774 |  |  | 4,429 |
Total assets held for sale | $ | 4,887 |  | $ | 96,040 |  |  | $ | 4,908 |
Liabilities |  |  |  |
Current liabilities: |  |  |  |
Accounts payable | $ | — |  | $ | 67 |  |  | $ | 30 |
Taxes payable | 10,774 |  | 4,732 |  | (a) | 10,857 |
Other accrued liabilities | 2,810 |  | 2,311 |  |  | 2,884 |
Total current liabilities held for sale | 13,584 |  | 7,110 |  |  | 13,771 |
Total liabilities held for sale | $ | 13,584 |  | $ | 7,110 |  |  | $ | 13,771 |
(a) | On the Company's Consolidated Balance Sheets, this amount was reclassified to prepayments and other current assets and is reflected in current assets held for sale.
The carrying amounts of the major classes of assets and liabilities classified as held for sale, related to the operations of and activity associated with Dakota Prairie Refining, on the Company's Consolidated Balance Sheets were as follows:
| March 31, 2018 |  |  | March 31, 2017 |  | December 31, 2017 |  |
| (In thousands) |
Assets |  |  |  |  |
Current assets: |  |  |  |  |
Income taxes receivable | $ | 1,858 |  | (a) | $ | 11,756 |  | $ | 1,778 |  | (a)
Total current assets held for sale | 1,858 |  |  | 11,756 |  | 1,778 |  |
Total assets held for sale | $ | 1,858 |  |  | $ | 11,756 |  | $ | 1,778 |  |
Liabilities |  |  |  |  |
Current liabilities: |  |  |  |  |
Accounts payable | $ | — |  |  | $ | 16 |  | $ | — |  |
Total current liabilities held for sale | — |  |  | 16 |  | — |  |
Noncurrent liabilities: |  |  |  |  |
Deferred income taxes (b) | 37 |  |  | 55 |  | 37 |  |
Total noncurrent liabilities held for sale | 37 |  |  | 55 |  | 37 |  |
Total liabilities held for sale | $ | 37 |  |  | $ | 71 |  | $ | 37 |  |
(a) | On the Company's Consolidated Balance Sheets, these amounts were reclassified to taxes payable and are reflected in current liabilities held for sale.
(b) | On the Company's Consolidated Balance Sheets, these amounts were reclassified to deferred charges and other assets - deferred income taxes and are reflected in noncurrent assets held for sale.
Reconciliation of major classes of income and expense | The reconciliation of the major classes of income and expense constituting pretax income (loss) from discontinued operations, which includes Dakota Prairie Refining and Fidelity, to the after-tax income from discontinued operations on the Company's Consolidated Statements of Income was as follows:
| Three Months Ended |
| March 31, |
| 2018 |  | 2017 |  |
| (In thousands)
Operating revenues | $ | 66 |  | $ | 105 |  |
Operating expenses | 174 |  | (6,577 | ) |
Operating income (loss) | (108 | ) | 6,682 |  |
Other income (expense) | 12 |  | (15 | ) |
Interest expense | 575 |  | — |  |
Income (loss) from discontinued operations before income taxes | (671 | ) | 6,667 |  |
Income taxes | (1,148 | ) | 4,980 |  | *
Income from discontinued operations | $ | 477 |  | $ | 1,687 |  |
* | Includes an elimination for the presentation of income tax adjustments between continuing and discontinued operations.

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- Definition Tabular disclosure of information related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721533-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721665-107760 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1474-107760 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721683-107760 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3A -URI http://asc.fasb.org/extlink&oid=84176398&loc=SL51724579-110230 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5C -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721675-107760 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 4A -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721663-107760 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84176398&loc=d3e2941-110230 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721673-107760 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 3A -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721659-107760 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5A -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721671-107760 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5D -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721677-107760 + Details
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