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PROPERTY, PLANT & EQUIPMENT (Tables) | 12 Months Ended
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Dec. 31, 2017
Property, Plant and Equipment [Abstract] |
Major Classes of Depreciable Assets | The major classes of depreciable assets are as follows:
|  | December 31,
In thousands |  | 2017 |  | 2016
Machinery and equipment |  | $ | 728,257 |  |  | $ | 645,354 |
Buildings and improvements |  | 259,561 |  |  | 225,307 |
Land and improvements |  | 38,228 |  |  | 41,569 |
Property, plant and equipment |  | 1,026,046 |  |  | 912,230 |
Less: accumulated depreciation |  | (452,074 | ) |  | (393,854 | )
Total |  | $ | 573,972 |  |  | $ | 518,376 |
Estimated Useful Lives of Property Plant and Equipment | The estimated useful lives of property, plant and equipment are as follows:
| Years
Land improvements | 10 to 20
Building and improvements | 20 to 40
Machinery and equipment | 3 to 15

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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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