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Commitments and Contingencies (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Mar. 31, 2012
Loan Contracts with Off-Balance Sheet Commitments    
Construction loan contract amount $ 10,293 $ 6,397
Cumulative advances (5,381) (3,865)
Remaining construction contingent commitment $ 4,912 $ 2,532