Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment [Abstract]

Summary of Property, Plant and Equipment

Property, plant and equipment consist of the following as of December 31 (in thousands):

	2014			2013
Building and improvements	$	50,394		$	48,774
Machinery and equipment		203,496			195,873
Furniture and fixtures		2,237			2,062
Forklifts and tractors		6,052			6,191
Computer equipment		8,120			8,353
Construction in process		6,707			7,619
Land		8,858			8,858
Total property, plant and equipment		285,864			277,730
Accumulated depreciation		(187,148	)		(176,947	)
Total property, plant and equipment, net	$	98,716		$	100,783