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Fair Value Measurements Assets within Level 3 of Valuation Hierarchy (Details) - USD ($)
 3 Months Ended 9 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Available-for-sale     $ 101,185,000  
Available-for-sale $ 68,192,000   68,192,000  
Change in unrealized loss of securities available-for sale (592,000) $ 1,103,000 (364,000) $ 2,817,000
Mortgage servicing rights     210,000  
Mortgage servicing rights 205,000   205,000  
Fair Value, Inputs, Level 3 [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Available-for-sale     47,000 49,000
Available-for-sale Securities, Gross Unrealized Gain (Loss)     0 0
Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities     1,000 2,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net     0 0
Available-for-sale 46,000 47,000 46,000 47,000
Change in unrealized loss of securities available-for sale     0 0
Mortgage servicing rights     210,000 265,000
Mortgage Servicing unrealized loss [1] (5,000) (54,000) (5,000) (54,000)
Payments for (Proceeds from) Mortgage Servicing Rights     0 0
Mortgage servicing rights $ 205,000 $ 211,000 205,000 211,000
Change in unrealized gains and losses to instruments held     $ (4,000) $ (52,000)
[1] (1) Includes net servicing cash flows and the passage of time.