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Investment Securities (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
Gain (loss) on investments        
Net gain on investment securities $ 680us-gaap_MarketableSecuritiesGainLoss $ 1,102us-gaap_MarketableSecuritiesGainLoss $ 695us-gaap_MarketableSecuritiesGainLoss $ 1,565us-gaap_MarketableSecuritiesGainLoss
Unrealized gain (loss) related to securities still held $ 219us-gaap_MarketableSecuritiesUnrealizedGainLoss $ 586us-gaap_MarketableSecuritiesUnrealizedGainLoss $ 288us-gaap_MarketableSecuritiesUnrealizedGainLoss $ 953us-gaap_MarketableSecuritiesUnrealizedGainLoss