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4. Mortgage-backed Securities: Mortgage backed securities available for sale pledged as collateral policy (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2013 | Mar. 31, 2012
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Details |  |
Mortgage backed securities available for sale pledged as collateral amortized cost | $ 416 | $ 744
Mortgage backed securities available for sale pledged as collateral fair value | $ 431 | $ 776

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