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Investments - Gross Unrealized Losses (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Schedule of Trading Securities and Other Trading Assets    
Trading Securities, Realized Gain (Loss) $ 15 $ (42)
Trading Securities, Change in Unrealized Holding Gain (Loss) (205) (652)
Preferred Stock
   
Schedule of Trading Securities and Other Trading Assets    
Trading Securities, Realized Gain (Loss) $ (190) $ (694)