Property, Plant and Equipment, Net (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Property, plant and equipment, net (Textual) [Abstract]
Depreciation	$ 8.7	$ 10.0	$ 27.3	$ 29.9