Quarterly report pursuant to Section 13 or 15(d)

Property, Equipment and Software (Details Textual)

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Property, Equipment and Software (Details Textual) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Property Equipment and Software (Textual) [Abstract]        
Depreciation and amortization expense for property, equipment and software $ 3.5 $ 3.1 $ 10.3 $ 9.5