Subsequent Event (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Subsequent Events [Abstract]
Date Received Notification From Convertible Debt Holders Of Intent To Covert	Apr. 22, 2013
Principal Value of Convertible Note Holders Intent to Convert	$ 36.8
Number Of Trading Days Used To Determine Excess Conversion Value Above Face Value For Convertible Notes	25 days