Capitalized Software, Furniture, Equipment and Leasehold Improvements (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Capitalized Software, Furniture, Equipment and Leasehold Improvements (Textual) [Abstract]
Software development costs	$ 5.2	$ 4.1	$ 1.9