Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2013

Property Plant And Equipment [Abstract]

Summary of Property, Plant and Equipment

Property, plant and equipment as of March 31, 2013 and December 31, 2012 comprise the following:

	March 31, 2013			December 31, 2012
Buildings and related structures	$	77,022		$	79,822
Machinery and equipment		244,550			221,927
Vehicles and others		17,493			17,143
Equipment under capital lease		11,732			12,181
		350,797			331,073
Less: accumulated depreciation		(108,382	)		(106,271	)
accumulated depreciation on equipment under capital lease		(3,789	)		(3,697	)
Land		16,518			17,151
Property, plant and equipment, net	$	255,144		$	238,256