Property, Plant, and Equipment (Tables)

3 Months Ended

Mar. 31, 2013

Property, Plant, and Equipment

Summary of costs for property, plant, and equipment

	March 31, 2013		December 31, 2012
	(in thousands)
Land and improvements		3,787	$	2,611
Buildings and improvements		1,611		1,223
Machinery and equipment		527,691		403,682
Automotive equipment		356		357
Furniture and fixtures		346		343
Railcars		2,496		2,496
Construction in progress		16,397		132,428
		552,684	$	543,140
Less: Accumulated depreciation		137,305		131,540
Total net, property, plant and equipment	$	415,379	$	411,600