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v3.19.1

Property, Plant and Equipment (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($) a | Dec. 31, 2017 USD ($)
Property, Plant and Equipment |  |
Property, plant and equipment - gross | $ 188,655 | $ 189,076
Less accumulated depreciation and amortization, including accumulated amortization of capitalized leases | 101,798 | (92,980)
Total property, plant and equipment, net | 86,857 | 96,096
Depreciation | 11,495 | 12,849
Proceeds from the sale of property, plant, and equipment | 2,389 | 1,462
Land |  |
Property, Plant and Equipment |  |
Property, plant and equipment - gross | $ 12,440 | 14,869
Area of land (in acres) | a | 54.5 |
Improvements to land and leaseholds |  |
Property, Plant and Equipment |  |
Property, plant and equipment - gross | $ 17,610 | 17,415
Buildings |  |
Property, Plant and Equipment |  |
Property, plant and equipment - gross | 34,608 | 34,929
Machinery and equipment, including equipment under capitalized leases |  |
Property, Plant and Equipment |  |
Property, plant and equipment - gross | 120,914 | 120,806
Construction in progress |  |
Property, Plant and Equipment |  |
Property, plant and equipment - gross | $ 3,083 | $ 1,057

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