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Plant, Equipment and Timberlands (Tables) | 12 Months Ended
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Dec. 31, 2017
Property Plant And Equipment [Abstract] |
Summary of Plant, Equipment and Timberlands | Plant, equipment and timberlands at December 31 were as follows:
In thousands |  | 2017 |  |  |  |  | 2016 |
Land and buildings | $ | 221,436 |  |  |  | $ | 192,877 |
Machinery and equipment |  | 1,484,545 |  |  |  |  | 1,335,669 |
Furniture, fixtures, and other |  | 174,462 |  |  |  |  | 142,110 |
Accumulated depreciation |  | (1,125,203 | ) |  |  |  | (1,036,825 | )
|  | 755,240 |  |  |  |  | 633,831 |
Construction in progress |  | 105,673 |  |  |  |  | 137,665 |
Timberlands, less depletion |  | 4,830 |  |  |  |  | 4,402 |
Total | $ | 865,743 |  |  |  | $ | 775,898 |
Summary of Interest Expense Capitalized | The following table sets forth amounts of interest expense capitalized in connection with major capital projects:
| Year Ended December 31 |  |
| 2017 |  |  |  | 2016 |  |  |  | 2015 |  |
Interest cost incurred | $ | 19,852 |  |  |  | $ | 17,431 |  |  |  | $ | 17,815 |  |
Interest capitalized |  | 2,080 |  |  |  |  | 1,609 |  |  |  |  | 351 |  |
Interest expense | $ | 17,772 |  |  |  | $ | 15,822 |  |  |  | $ | 17,464 |  |

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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