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Investments - Gross Unrealized Losses (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Schedule of Trading Securities and Other Trading Assets        
Trading Securities, Realized Gain (Loss) $ (39)us-gaap_TradingSecuritiesRealizedGainLoss $ (24)us-gaap_TradingSecuritiesRealizedGainLoss $ (39)us-gaap_TradingSecuritiesRealizedGainLoss $ (66)us-gaap_TradingSecuritiesRealizedGainLoss
Unrealized gains (losses) from trading securities held for investment 244us-gaap_TradingSecuritiesUnrealizedHoldingGainLoss (31)us-gaap_TradingSecuritiesUnrealizedHoldingGainLoss 54us-gaap_TradingSecuritiesUnrealizedHoldingGainLoss (684)us-gaap_TradingSecuritiesUnrealizedHoldingGainLoss
Preferred Stock [Member]        
Schedule of Trading Securities and Other Trading Assets        
Trading Securities, Realized Gain (Loss) $ 205us-gaap_TradingSecuritiesRealizedGainLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember		 $ (55)us-gaap_TradingSecuritiesRealizedGainLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember		 $ 15us-gaap_TradingSecuritiesRealizedGainLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember		 $ (750)us-gaap_TradingSecuritiesRealizedGainLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember