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E. PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Property, plant and equipment, gross $ 190,183 $ 125,331
Less accumulated depreciation and amortization (49,175) (37,970)
Property, plant and equipment after accumulated depreciation and amortization, excluding construction in progress and land 141,008 87,361
Construction in progress 1,989 21,237
Land 1,101 1,101
Property, plant and equipment, net 144,098 109,699
Land improvements [Member]    
Property, plant and equipment, gross 792 863
Building and improvements [Member]    
Property, plant and equipment, gross 69,368 27,255
Machinery and equipment [Member]    
Property, plant and equipment, gross 108,724 88,882
Furniture and fixtures [Member]    
Property, plant and equipment, gross 4,227 2,422
Computer equipment and software [Member]    
Property, plant and equipment, gross 6,836 5,615
Transportation equipment [Member]    
Property, plant and equipment, gross $ 236 $ 294