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Loans Receivable and Other Lending Investments, net (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Receivables [Abstract]    
Carrying value of loans sold $ 30.8 $ 95.1
Realized investment gains (losses) $ 19.1 $ (0.6)