Property, Plant and Equipment (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Property Plant and Equipment (Textual) [Abstract]
Depreciation expense, inclusive of expense captured in cost of revenue	$ 2.3	$ 2.0	$ 4.4	$ 4.0