Property, Plant And Equipment (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Property, Plant And Equipment [Abstract]
Depreciation expense	$ 2.8	$ 3.4	$ 4.5
Cost of disposed assets		3.1
Accumulated depreciation of disposed assets		$ 3.0