Property, Plant and Equipment (Tables)

6 Months Ended

Jun. 30, 2014

Property, Plant and Equipment [Abstract]

Property, plant and equipment

Property, plant and equipment consisted of the following (in thousands):

	June 30, 2014			December 31, 2013
Machinery and equipment	$	184,155		$	180,851
Land	8,101			8,101
Buildings and improvements	54,313			53,915
Computer equipment and software	11,953			11,742
Office furniture and fixtures	1,986			1,928
	260,508			256,537
Accumulated depreciation	(204,254		)	(198,758		)
Total property, plant and equipment, net	$	56,254		$	57,779