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Fair Value Measurements Assets within Level 3 of Valuation Hierarchy (Details) - USD ($)
 3 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Available-for-sale $ 101,185,000  
Available-for-sale 86,972,000  
Change in unrealized loss of securities available-for sale (868,000) $ 1,562,000
Mortgage servicing rights 210,000  
Mortgage servicing rights 204,000  
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) (1,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net 0 0
Available-for-sale 46,000 48,000
Change in unrealized loss of securities available-for sale 0 0
Mortgage servicing rights 210,000 265,000
Mortgage Servicing unrealized loss [1] (6,000) (15,000)
Payments for (Proceeds from) Mortgage Servicing Rights 0 0
Mortgage servicing rights 204,000 250,000
Change in unrealized gains and losses to instruments held $ (6,000) $ (15,000)
[1] (1) Includes net servicing cash flows and the passage of time.