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Discontinued Operations Discontinued Operations (Tables) | 12 Months Ended
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Dec. 31, 2020
Discontinued Operations and Disposal Groups [Abstract] |
Disposal Groups, Including Discontinued Operations [Table Text Block] | Results of discontinued operations are summarized as follows (dollars in thousands):
|  |  |  | Year ended December 31,
|  |  |  | 2019 |  | 2018
Net sales |  |  |  | $ | 182,590 |  |  | $ | 172,110 |
Cost of sales |  |  |  | (138,100) |  |  | (128,100) |
Gross profit |  |  |  | 44,490 |  |  | 44,010 |
Selling, general and administrative expenses |  |  |  | (32,920) |  |  | (30,590) |
Net gain (loss) on dispositions of assets |  |  |  | 38,900 |  |  | (160) |
Operating profit |  |  |  | 50,470 |  |  | 13,260 |
Other income (expense), net |  |  |  | (30) |  |  | 360 |
Other income (expense), net |  |  |  | (30) |  |  | 360 |
Income from discontinued operations, before income taxes |  |  |  | 50,440 |  |  | 13,620 |
Income tax expense |  |  |  | (13,760) |  |  | (4,030) |
Income from discontinued operations, net of tax |  |  |  | $ | 36,680 |  |  | $ | 9,590 |

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