Pattiki Vertical Hoist Conveyor System Failure In 2010 (Details) (Pattiki Vertical Hoist Conveyor System [Member], USD $) In Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2010	Jun. 30, 2010
Pattiki Vertical Hoist Conveyor System [Member]
Expense related to retirement of assets	$ 1.2	$ 1.2