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Summary of Significant Accounting Policies Summary of Significant Accounting Policies Text Tag (Details)
12 Months Ended
Mar. 31, 2017
USD ($)
Mar. 31, 2016
USD ($)
Available-for-sale Securities, Gross Unrealized Losses $ 1,940,000 $ 378,000
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net $ 0  
Number of Reportable Segments 1  
Mortgage servicing rights $ 192,000 201,000
Other investments    
Available-for-sale Securities, Gross Unrealized Losses [1] $ 496,000 $ 207,000
[1] (1) Primarily comprised of an investment in a CRA fund with 95% of its underlying investments consisting of government and agency backed securities.