Fair Value Measurements Assets within Level 3 of Valuation Hierarchy (Details) - USD ($)		3 Months Ended		6 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale				$ 101,185,000
Available-for-sale		$ 75,760,000		75,760,000
Change in unrealized loss of securities available-for sale		1,096,000	$ 150,000	228,000	$ 1,713,000
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		46,000		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			48,000		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]	(5,000)	(26,000)	(5,000)	(26,000)
Payments for (Proceeds from) Mortgage Servicing Rights				0	0
Mortgage servicing rights		$ 205,000	$ 239,000	205,000	239,000
Change in unrealized gains and losses to instruments held				$ (4,000)	$ (25,000)

[1] (1) Includes net servicing cash flows and the passage of time.