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Segment Information Narrative (Details) (Financial Services [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Financial Services [Member]
       
Segment Reporting Information        
Interest Income, Operating $ 1.3 $ 1.1 $ 2.6 $ 2.1