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5. Investment Securities (Details) (USD $)
3 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Mar. 31, 2013
Details      
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds $ 0 $ 0  
Available-for-sale Securities Pledged as Collateral $ 967,000   $ 996,000