Earnings Per Share (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share (Textual) [Abstract]
Expense on the change in the fair value of the warrants	$ 6.4	$ 3.6	$ 32.2	$ 7.5