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Discontinued operations | 12 Months Ended
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Dec. 31, 2019
Discontinued Operations and Disposal Groups [Abstract] |
Discontinued operations | Discontinued Operations The assets and liabilities of the Company's discontinued operations have been classified as held for sale and the results of operations are shown in income (loss) from discontinued operations, other than certain general and administrative costs and interest expense which do not meet the criteria for income (loss) from discontinued operations. At the time the assets were classified as held for sale, depreciation, depletion and amortization expense was no longer recorded. On June 27, 2016, the Company sold Dakota Prairie Refining to Tesoro. During 2015 and 2016, the Company sold substantially all of Fidelity's oil and natural gas assets. In July 2018, the Company completed the sale of a majority of the remaining property, plant and equipment of Fidelity. The sales of Dakota Prairie Refining and Fidelity were part of the Company's strategic plan to grow its capital investments in the remaining business segments, reduce exposure to commodity pricing and to focus on creating a greater long-term value. At December 31, 2019 and 2018, the Company’s deferred tax assets included in assets held for sale of $1.3 million and $1.9 million, respectively, were largely comprised of state alternative minimum tax credits. The carrying amounts of the major classes of assets and liabilities classified as held for sale on the Consolidated Balance Sheets at December 31 were as follows:
| 2019 |  | 2018 |
| (In thousands)
Assets |  |
Current assets: |  |
Receivables, net | $ | 425 |  | $ | 430 |
Total current assets held for sale | 425 |  | 430 |
Noncurrent assets: |  |
Deferred income taxes | 1,265 |  | 1,926 |
Other | 161 |  | 161 |
Total noncurrent assets held for sale | 1,426 |  | 2,087 |
Total assets held for sale | $ | 1,851 |  | $ | 2,517 |
Liabilities |  |
Current liabilities: |  |
Accounts payable | $ | — |  | $ | 80 |
Taxes payable | 1,279 |  | 1,451 |
Other accrued liabilities | 2,232 |  | 2,470 |
Total current liabilities held for sale | 3,511 |  | 4,001 |
Total liabilities held for sale | $ | 3,511 |  | $ | 4,001 |
The reconciliation of the major classes of income and expense constituting pretax income (loss) from discontinued operations to the after-tax income (loss) from discontinued operations on the Consolidated Statements of Income for the years ended December 31 were as follows:
| 2019 |  | 2018 |  | 2017 |
| (In thousands)
Operating revenues | $ | 103 |  | $ | (459 | ) | $ | 465 |
Operating expenses | 290 |  | 921 |  | (4,607 | )
Operating income (loss) | (187 | ) | (1,380 | ) | 5,072 |
Other income (expense) | — |  | 12 |  | (13 | )
Interest expense | — |  | 575 |  | 250 |
Income (loss) from discontinued operations before income taxes | (187 | ) | (1,943 | ) | 4,809 |
Income taxes* | (474 | ) | (4,875 | ) | 8,592 |
Income (loss) from discontinued operations | $ | 287 |  | $ | 2,932 |  | $ | (3,783 | )
* | Includes eliminations for the presentation of income tax adjustments between continuing and discontinued operations.

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- Definition The entire disclosure 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2122178 + Details
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