Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2013

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment

Property, plant and equipment consist of the following:

	December 31,
	2013			2012
Land	$	4,312		$	4,221
Buildings and improvements		108,460			92,307
Machinery and equipment		398,490			364,370
Furniture and fixtures		1,884			1,813
Construction in progress		16,808			21,382
Total		529,954			484,093
Accumulated depreciation		(357,988	)		(332,278	)
Net	$	171,966		$	151,815