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Investments - Gross Unrealized Losses (Details) (Preferred Stock, USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Jun. 30, 2012
Preferred Stock
   
Schedule of Trading Securities and Other Trading Assets    
Less than 12 Months - Fair Value $ 5,391 $ 1,750
Less than 12 Months - Unrealized Loss (161) (16)
Total - Fair Value 7,318 2,891
Total - Unrealized Loss $ (228) $ (40)