UPDATE 2-Discover beats forecasts, profit more than doubles

* Shares up 1.5 premarket
(Adds expectations, revenue, loan balances, background;
updates shares)

Source: http://feeds.reuters.com/~r/reuters/financialServicesRealEstateNews/~3/d7vT0xdVi1U/discover-idUSN1E75L26520110623

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