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Property, plant and equipment | 12 Months Ended
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Dec. 31, 2018
Property, Plant and Equipment [Abstract] |
Property, plant and equipment | Property, plant and equipment The major classes of property, plant and equipment, at cost, at December 31, 2018 and 2017 are as follows:
| 2018 |  | 2017
| (Dollars in thousands)
Land, buildings and leasehold improvements | $ | 224,605 |  |  | $ | 207,927 |
Machinery and equipment | 421,873 |  |  | 384,710 |
Computer equipment and software | 137,899 |  |  | 122,890 |
Construction in progress | 105,319 |  |  | 73,920 |
| 889,696 |  |  | 789,447 |
Less: Accumulated depreciation | (456,930 | ) |  | (406,448 | )
Property, plant and equipment, net | $ | 432,766 |  |  | $ | 382,999 |

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + 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 + Details
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